Merge branch 'finalize' into 'master'

Finalize See merge request !9

Merge branch 'finalize' into 'master'
9ac6089e · Nikolaus Wirtz · 5fdd369a · 015283e8 · 9ac6089e · 9ac6089e
Commit 9ac6089e authored 2 years ago by Nikolaus Wirtz
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ The project requires:
 Install the latest version of **_Python 3_** from https://www.python.org/downloads/. Verify that the path to the python executeable got added to the PATH system variable. For that open up the command prompt and use the command `python --version`. It should output the just installed python version.
-To install the required software the repository contains a bash script *pi-setup.sh*. To run the script use `sh pi-setup.sh` in the command line from the root directory of the project repository. The script updates the apt-package manager and installs **_Node.js_**, **_Node-RED_**, **_npm_** and **_PostgreSQL_**.
+To install the required software the repository contains a bash script *pi-setup.sh*. The script upgrades the apt-package manager and installs **_Node.js_**, **_Node-RED_**, **_npm_** and **_PostgreSQL_**. To run the script use `sh pi-setup.sh` in the command line from the root directory of the project repository. In case there are no execute permissions set for the files *pi-setup.sh* and *pi-setup-code.py* you have to manually set them first with `chmod +x pi-setup.sh` and `chmod +x pi-setup-code.py`.
 Additionally it installs the **_Node-RED-packages_** used by the project:
 - *node-red-contrib-buffer-parser*

--- a/__pycache__/config.cpython-39.pyc
+++ b/__pycache__/config.cpython-39.pyc
--- a/config.py
+++ b/config.py
@@ -4,5 +4,5 @@
 devices = 6
 # Set hostnames
-address_prefix = "example-prefix-"
+address_prefix = "prefix-example-"
-address_suffix = ".example-suffix"
+address_suffix = ".suffix-example"
\ No newline at end of file
--- a/flows.json
+++ b/flows.json
-[{"id":"e8034ec0.182578","type":"tab","label":"dv am","disabled":false,"info":""},{"id":"c206ac56.ec99c8","type":"tab","label":"data","disabled":false,"info":""},{"id":"f825e8a0.9d51f","type":"tab","label":"dv asset","disabled":false,"info":""},{"id":"6d95b6d3.106588","type":"tab","label":"Create data","disabled":false,"info":""},{"id":"3d5ce28770ed0d20","type":"postgresdb","hostname":"localhost","port":"5432","db":"vpp","ssl":false},{"id":"6a6c8a2.ae75774","type":"inject","z":"e8034ec0.182578","name":"Start","props":[{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"start","x":130,"y":260,"wires":[["2dc3a3fb.e32ef4"]]},{"id":"43189a12.ffbcf4","type":"inject","z":"e8034ec0.182578","name":"show params","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"device1","payloadType":"global","x":150,"y":80,"wires":[["6b714eca.075eb"]]},{"id":"6b714eca.075eb","type":"debug","z":"e8034ec0.182578","name":"show params","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":310,"y":80,"wires":[]},{"id":"2dc3a3fb.e32ef4","type":"file in","z":"e8034ec0.182578","name":"","filename":"/home/pi/Desktop/device1","format":"lines","chunk":false,"sendError":false,"encoding":"none","allProps":false,"x":330,"y":260,"wires":[["f35585cc.e58b68"]]},{"id":"1d979cd2.bd172b","type":"json","z":"e8034ec0.182578","name":"","property":"payload","action":"obj","pretty":false,"x":650,"y":260,"wires":[["10ffb8a7.ba3487"]]},{"id":"f35585cc.e58b68","type":"function","z":"e8034ec0.182578","name":"convert","func":"var newMsg;\nnewMsg = {\n    payload: \"[\" + msg.payload + \"]\"\n}\nreturn newMsg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":520,"y":260,"wires":[["1d979cd2.bd172b"]]},{"id":"8cfc218d.653c98","type":"function","z":"e8034ec0.182578","name":"Init. params","func":"// hardcoded device ID\nglobal.set(\"device1.id\",100001);\nglobal.set(\"device1.hostname_prefix\",\"tmp\");\nglobal.set(\"device1.hostname_suffix\",\"tmp\");\n\nglobal.set(\"device1.hostname\",global.get(\"device1.hostname_prefix\")+(global.get(\"device1.id\") - 100000)+ global.get(\"device1.hostname_suffix\"))\n\n// set initial state to follower\nglobal.set(\"device1.state\", \"follower\");\nvar randomWait =  Math.ceil(Math.random()*5)+1;\nglobal.set(\"device1.randomWait\", randomWait);\n// indices and thresholds\nglobal.set(\"device1.sysCommitIndex\",1);\nglobal.set(\"device1.dataCommitIndex\",1);\nglobal.set(\"device1.sysSnapshotTH\",5);\nglobal.set(\"device1.dataSnapshotTH\",30);\nglobal.set(\"device1.sysLastApplied\",0);\nglobal.set(\"device1.dataLastApplied\",0);\nglobal.set(\"device1.timestamp\",0);\nglobal.set(\"device1.leaderId\", null);\n\n// hardcoded number of devices\nglobal.set(\"device1.nodesNum\",6);\nvar len = global.get(\"device1.nodesNum\");\n\n// hardcoded functions\nglobal.set(\"device1.virtualFuncs[0].name\", \"FaultLoc\"); \nglobal.set(\"device1.virtualFuncs[0].device\", null); // value device id\nglobal.set(\"device1.virtualFuncs[1].name\", \"ServiceRes\"); \nglobal.set(\"device1.virtualFuncs[1].device\", null); \n\n// Device 0\nglobal.set(\"device1.devices[0].id\", null);\nglobal.set(\"device1.devices[0].online\", null);\nglobal.set(\"device1.devices[0].ip\", null);\nglobal.set(\"device1.devices[0].port\", null);\nglobal.set(\"device1.devices[0].nextSysLogIndex\", null);\nglobal.set(\"device1.devices[0].nextDataLogIndex\", null);\nglobal.set(\"device1.devices[0].matchSysLogIndex\", null);\nglobal.set(\"device1.devices[0].matchDataLogIndex\", null);\n\n// hardcoded devices\n\nfor (i= 1; i<len+1;i++) {\n    \n    global.set(\"device1.devices[\"+i+\"].id\", 100000+i);\n    global.set(\"device1.devices[\"+i+\"].online\", null);\n    global.set(\"device1.devices[\"+i+\"].ip\", \"127.0.0.1\");\n    global.set(\"device1.devices[\"+i+\"].port\", 10000+i);\n    global.set(\"device1.devices[\"+i+\"].nextSysLogIndex\", null);\n    global.set(\"device1.devices[\"+i+\"].nextDataLogIndex\", null);\n    global.set(\"device1.devices[\"+i+\"].matchSysLogIndex\", null);\n    global.set(\"device1.devices[\"+i+\"].matchDataLogIndex\", null);\n\n}\n\nmsg = {\n    topic: \"start\"\n}\nreturn msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1050,"y":260,"wires":[["c8e8e64b.60ec28"]]},{"id":"c8e8e64b.60ec28","type":"function","z":"e8034ec0.182578","name":"timeout","func":"var myTerm = global.get(\"device1.currentTerm\");\nvar myId = global.get(\"device1.id\");\n\nif(msg.topic.includes(\"start\") || msg.topic.includes(\"myRequestVoteRPC\")){ // start timer\n    context.set('count',0);\n    msg.payload = { \n        \"payload\": \"on\", \n        \"warning\": 0,\n        \"timeout\": global.get('device1.randomWait')\n    };\n    return msg;\n} \nelse if(msg.topic.includes(\"RPC\") && msg.payload.term >= myTerm){ //RPC from leader or candidate, to reactivate\n    msg.payload = { \n        \"payload\": \"on\", \n        \"warning\": 0,\n        \"timeout\": global.get('device1.randomWait')\n    };\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":520,"y":380,"wires":[["9f80a15f.bb2a98"]]},{"id":"5b97fc86.32033c","type":"function","z":"e8034ec0.182578","name":"updateParams","func":"if(msg.payload === \"off\"){\n    // random wait\n    var randomWait =  Math.ceil(Math.random()*5)+1;\n    flow.set(\"voteCount\", 1); // vote for self, count ++\n    global.set(\"device1.randomWait\", randomWait);\n    global.set(\"device1.state\", \"candidate\");\n    global.set(\"device1.currentTerm\", global.get(\"device1.currentTerm\")+1);\n    global.set(\"device1.voteFor\", global.get(\"device1.id\"));\n    msg = {\n        topic:\"myRequestVoteRPC\"\n    }\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":340,"y":460,"wires":[["473f8dd.9f0d274","c8e8e64b.60ec28"]]},{"id":"2677e779.36a628","type":"function","z":"e8034ec0.182578","name":"leaderInit","func":"var nextSysLogIndex = global.get(\"device1.systemLog\").length;\nvar nextDataLogIndex = global.get(\"device1.dataLog\").length;\nvar myId = global.get(\"device1.id\");\nvar len = global.get(\"device1.nodesNum\");\n\nfor(var i=1; i<=len; i++){\n    if(i != (myId-100000)){\n        global.set(\"device1.devices[\"+i+\"].nextSysLogIndex\",nextSysLogIndex);\n        global.set(\"device1.devices[\"+i+\"].nextDataLogIndex\",nextDataLogIndex);\n        global.set(\"device1.devices[\"+i+\"].matchSysLogIndex\",0);\n        global.set(\"device1.devices[\"+i+\"].matchDataLogIndex\",0);\n        global.set(\"device1.devices[\"+i+\"].online\",false);\n    } else {\n        global.set(\"device1.devices[\"+i+\"].online\",true);\n    }\n}\n  \n    \n// set leader\nglobal.set(\"device1.state\", \"leader\");\nglobal.set(\"device1.leaderId\", myId);\nreturn msg;\n\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1680,"y":400,"wires":[[]]},{"id":"7ee6d5c.ae9d22c","type":"function","z":"e8034ec0.182578","name":"isVote","func":"var sysLogLen = global.get(\"device1.systemLog\").length-1;\nvar dataLogLen = global.get(\"device1.dataLog\").length-1;\nvar mySysLogTerm = global.get(\"device1.systemLog[\"+sysLogLen+\"].term\");\nvar mySysLogIndex = global.get(\"device1.systemLog[\"+sysLogLen+\"].index\");\nvar myDataLogTerm = global.get(\"device1.dataLog[\"+dataLogLen+\"].term\");\nvar myDataLogIndex = global.get(\"device1.dataLog[\"+dataLogLen+\"].index\");\nvar myTerm = global.get(\"device1.currentTerm\");\nvar myVote = global.get(\"device1.voteFor\");\nvar myId = global.get(\"device1.id\");\nvar candidateId = msg.payload.candidateId;\nvar lastSysLogTerm = msg.payload.lastSysLogTerm;\nvar lastSysLogIndex = msg.payload.lastSysLogIndex;\nvar lastDataLogTerm = msg.payload.lastDataLogTerm;\nvar lastDataLogIndex = msg.payload.lastDataLogIndex;\nvar term = msg.payload.term;\nvar isVote = false;\n\n// safety 5.4.1\nif(lastSysLogTerm > mySysLogTerm && lastDataLogTerm > myDataLogTerm) {\n    isVote = true;\n} else if (lastSysLogTerm >= mySysLogTerm && lastDataLogTerm >= myDataLogTerm){\n    if(lastSysLogIndex >= mySysLogIndex && lastDataLogIndex >= myDataLogIndex) {\n        isVote = true;\n    }\n}\n\nif(myTerm < term) {\n    myTerm = term;\n    global.set(\"device1.state\", \"follower\");\n    global.set(\"device1.voteFor\", null);\n    myVote = null;\n    global.set(\"device1.currentTerm\", myTerm);\n} else if(myTerm > term) {\n    isVote = false;\n}\n\nif(isVote && (myVote === null || myVote == candidateId)) {\n    newMsg = {\n            payload: {\n                id: myId,\n                term: myTerm,\n                voteGranted: true\n            }\n    }\n    global.set(\"device1.voteFor\", candidateId);\n    \n} else {\n    newMsg = {\n        payload: {\n            id: myId,\n            term: myTerm,\n            voteGranted: false\n        }\n    }\n}\n\nmsg.payload = newMsg.payload;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":650,"y":800,"wires":[["5703d621e5907de8"]]},{"id":"17745a55.895cfe","type":"function","z":"e8034ec0.182578","name":"replyToLeader","func":"if (msg.payload.term > global.get(\"device1.currentTerm\")){// discover higher term\n\n    node.warn(\"ReplyToLeader: Back to follower\");\n\n    global.set(\"device1.currentTerm\", msg.payload.term);\n    global.set(\"device1.voteFor\", null);\n    global.set(\"device1.state\", \"follower\"); // back to follower\n    \n} else if (global.get(\"device1.state\") == \"candidate\" && msg.payload.term == global.get(\"device1.currentTerm\")) { \n    global.set(\"device1.state\", \"follower\"); ////candidate discovers current leader,  back to follower\n    \n    node.warn(\"ReplyToLeader: Candidate to follower\");   \n\n} else if (msg.payload.term < global.get(\"device1.currentTerm\")) {\n\n    node.warn(\"ReplyToLeader: MSG.TERM smaller than current TERM\");\n\n    let newPayload = {\n            id: global.get(\"device1.id\"),\n            term: global.get(\"device1.currentTerm\"),\n            sysSuccess: false,\n            dataSuccess: false,\n            sysEntriesLen: msg.payload.sysEntries.length,\n            dataEntriesLen: msg.payload.dataEntries.length\n        }\n\n    msg.payload = newPayload;\n    return msg;\n}\n\nif(global.get(\"device1.state\") == \"follower\"){\n    global.set(\"device1.leaderId\", msg.payload.leaderId); \n    var myId = global.get(\"device1.id\");\n    var myTerm = global.get(\"device1.currentTerm\");\n    var mySystemLog = global.get(\"device1.systemLog\");\n    var myDataLog = global.get(\"device1.dataLog\");\n    var sysSuccess = false;\n    var dataSuccess = false;\n    var sysCommitIndex = Math.min(msg.payload.leaderSysCommit, mySystemLog[mySystemLog.length-1].index);\n    var dataCommitIndex = Math.min(msg.payload.leaderDataCommit, myDataLog[myDataLog.length-1].index)\n    global.set(\"device1.sysCommitIndex\", sysCommitIndex);\n    global.set(\"device1.dataCommitIndex\", dataCommitIndex);\n    var newSysLog = [];\n    var newDataLog = [];\n    \n    // snapshot here\n    var sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n    var sysLastApplied = global.get(\"device1.sysLastApplied\");\n    var currvirtualFuncs0 = global.get(\"device1.virtualFuncs[0].device\");\n    var currvirtualFuncs1 = global.get(\"device1.virtualFuncs[1].device\");\n    var sysSnapshotTH = global.get(\"device1.sysSnapshotTH\");\n    if(sysLastApplied - sysSnapshotIndex > sysSnapshotTH) {\n        let logAfterSnapshot = [];\n        let newSysSnapshotTerm = -1;\n        for(let log of mySystemLog) {\n            if(log.index == sysLastApplied){\n                newSysSnapshotTerm = log.term;\n                let newFirstLog = {\n                    index: sysLastApplied,\n                    term: newSysSnapshotTerm,\n                    command: null\n                };\n                logAfterSnapshot.push(newFirstLog);\n            } else if(log.index > sysLastApplied) {\n                logAfterSnapshot.push(log);\n            }\n        }\n        global.set(\"device1.sysSnapshot.index\",sysLastApplied);\n        global.set(\"device1.sysSnapshot.term\",newSysSnapshotTerm);\n        global.set(\"device1.sysSnapshot.virtualFuncs[0].device\",currvirtualFuncs0);\n        global.set(\"device1.sysSnapshot.virtualFuncs[1].device\",currvirtualFuncs1);\n        mySystemLog = logAfterSnapshot;\n        global.set(\"device1.systemLog\",mySystemLog);\n        \n    }\n    \n    var dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\n    var dataLastApplied = global.get(\"device1.dataLastApplied\");\n    var currTs = global.get(\"device1.timestamp\");\n    var dataSnapshotTH = global.get(\"device1.dataSnapshotTH\");\n    if(dataLastApplied - dataSnapshotIndex > dataSnapshotTH) {\n        let logAfterSnapshot = [];\n        let newDataSnapshotTerm = -1;\n        for(let log of myDataLog) {\n            if(log.index == dataLastApplied){\n                newDataSnapshotTerm = log.term;\n                let newFirstLog = {\n                    index: dataLastApplied,\n                    term: newDataSnapshotTerm,\n                    command: null\n                };\n                logAfterSnapshot.push(newFirstLog);\n                node.warn(\"Pushing empty log\");\n            } else if(log.index > dataLastApplied) {\n                logAfterSnapshot.push(log);\n                node.warn(\"Pushing non-empty log\");\n            }\n        }\n        global.set(\"device1.dataSnapshot.index\",dataLastApplied);\n        global.set(\"device1.dataSnapshot.term\",newDataSnapshotTerm);\n        global.set(\"device1.dataSnapshot.timestamp\",currTs);\n        myDataLog = logAfterSnapshot;\n        global.set(\"device1.dataLog\",myDataLog);\n        \n    }\n    \n    \n    \n    for (let log of mySystemLog){\n        newSysLog.push(log);\n        if(log.index == msg.payload.prevSysLogIndex) {\n            if(log.term == msg.payload.prevSysLogTerm) {\n                //  mySysLog until prevSysLogIndex(newSysLog) + sysEntries in AppendEntries RPC\n                if(msg.payload.sysEntries.length > 1) { // sysEntriesNotNull\n                    global.set(\"device1.systemLog\", newSysLog.concat(msg.payload.sysEntries.slice(1, msg.payload.sysEntries.length)));\n                }\n                sysSuccess = true;\n            }\n            break;\n        } \n    }\n\n    for (let log of myDataLog){\n        newDataLog.push(log);\n        if(log.index == msg.payload.prevDataLogIndex) {\n            if(log.term == msg.payload.prevDataLogTerm) {\n                if(msg.payload.dataEntries.length > 1) { // dataEntriesNotNull\n                    global.set(\"device1.dataLog\", newDataLog.concat(msg.payload.dataEntries.slice(1, msg.payload.dataEntries.length)));\n                }\n                dataSuccess = true;\n            }\n            break;\n        } \n    }\n    \n    let newPayload = {\n            id: global.get(\"device1.id\"),\n            term: global.get(\"device1.currentTerm\"),\n            sysSuccess: sysSuccess,\n            dataSuccess: dataSuccess,\n            sysEntriesLen: msg.payload.sysEntries.length,\n            dataEntriesLen: msg.payload.dataEntries.length\n        }\n\n    msg.payload = newPayload;\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":680,"y":760,"wires":[["626db20f.d92afc","5703d621e5907de8"]]},{"id":"626db20f.d92afc","type":"function","z":"e8034ec0.182578","name":"persistent storage","func":"msg.payload = {\n    currentTerm: global.get(\"device1.currentTerm\"),\n    voteFor: global.get(\"device1.voteFor\"),\n    systemLog: global.get(\"device1.systemLog\"),\n    dataLog: global.get(\"device1.dataLog\"),\n    sysSnapshot: global.get(\"device1.sysSnapshot\"),\n    dataSnapshot: global.get(\"device1.dataSnapshot\")\n};\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":950,"y":760,"wires":[["9d92fc1d.4fbb2"]]},{"id":"9d92fc1d.4fbb2","type":"file","z":"e8034ec0.182578","name":"","filename":"/home/pi/Desktop/device1","appendNewline":false,"createDir":true,"overwriteFile":"true","encoding":"none","x":1170,"y":760,"wires":[[]]},{"id":"473f8dd.9f0d274","type":"function","z":"e8034ec0.182578","name":"RequestVoteRPC","func":"var sysLogLen = global.get(\"device1.systemLog\").length-1;\nvar dataLogLen = global.get(\"device1.dataLog\").length-1;\n\nvar newMsg = {\n    payload:{\n        term: global.get(\"device1.currentTerm\"),\n        candidateId: global.get(\"device1.id\"),\n        lastSysLogIndex: global.get(\"device1.systemLog[\"+sysLogLen+\"].index\"),\n        lastSysLogTerm: global.get(\"device1.systemLog[\"+sysLogLen+\"].term\"),\n        lastDataLogIndex: global.get(\"device1.dataLog[\"+dataLogLen+\"].index\"),\n        lastDataLogTerm: global.get(\"device1.dataLog[\"+dataLogLen+\"].term\")\n    }\n};\n\nreturn newMsg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":550,"y":520,"wires":[["5f8746972ea09559"]]},{"id":"3e3a97b7.c7f7b","type":"function","z":"e8034ec0.182578","name":"results recv","func":"var myTerm = global.get(\"device1.currentTerm\");\nvar voteCount = flow.get(\"voteCount\");\nvar nodesNum = global.get(\"device1.nodesNum\");\n\nif (typeof msg.payload != \"undefined\") {\n    if(msg.payload.voteGranted && msg.payload.term == myTerm) {\n        voteCount += 1;\n        flow.set(\"voteCount\", voteCount);\n    } else if (msg.payload.term > myTerm) {\n        flow.set(\"voteCount\", 0);\n    }\n}\n\nif(voteCount >= (nodesNum+1)/2 ) {\n    flow.set(\"voteCount\", 0);\n    msg.payload = { \n        \"payload\": \"cancel\" // cancel timer\n    };\n    return msg; // leader Init\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1390,"y":520,"wires":[["2677e779.36a628","9f80a15f.bb2a98","82ba0c9b.becd58"]]},{"id":"507503c7.60aaa4","type":"inject","z":"e8034ec0.182578","name":"heartbeats","props":[{"p":"payload.heartbeat","vt":"bool","v":"true"},{"p":"topic","vt":"str"}],"repeat":"1","crontab":"","once":true,"onceDelay":"0.1","topic":"","x":110,"y":1220,"wires":[["878781ba.aef818","7a15a110.bac49","4cebd161.848db8","9a1bba8b.93412","454e8a3cfd7fdbd8"]]},{"id":"878781ba.aef818","type":"function","z":"e8034ec0.182578","name":"isLeader & AppendEntries","func":"var len = global.get(\"device1.nodesNum\") || 1;\nvar newMsg = new Array(len-1);\nvar mySystemLog = global.get(\"device1.systemLog\");\nvar myDataLog = global.get(\"device1.dataLog\");\nvar myId = global.get(\"device1.id\");\nvar myState = global.get(\"device1.state\");\nvar j = 0;\n\nif(myState == \"leader\"){ //I'm leader\n    for(var i=1; i<=len; i++){\n        var sendId=100000 + i;\n        if(sendId != myId){\n            var dataEntries = [];\n            var sysEntries = [];\n            var entry = {\n                        index: -1,\n                        term: -1,\n                        command: \" \"\n            };\n            sysEntries.push(entry); // add this for protobuf encode/decode\n            dataEntries.push(entry);\n            var prevSysLogIndex = global.get(\"device1.devices[\"+i+\"].nextSysLogIndex\")-1;\n            var prevSysLogTerm = -1; // after iter. still -1? -> in snapshot\n            var prevDataLogIndex = global.get(\"device1.devices[\"+i+\"].nextDataLogIndex\")-1;\n            var prevDataLogTerm = -1; // after iter. still -1? -> in snapshot\n            \n\n            for (let log of mySystemLog){\n                if(log.index == prevSysLogIndex) {\n                    prevSysLogTerm = log.term;\n                } else if (log.index > prevSysLogIndex){\n                    entry = {\n                        index: log.index,\n                        term: log.term,\n                        command: log.command\n                    };\n                    sysEntries.push(entry);\n                }\n            }\n            for (let log of myDataLog) {\n                if(log.index == prevDataLogIndex) {\n                    prevDataLogTerm = log.term;\n                } else if (log.index > prevDataLogIndex){\n                    entry = {\n                        index: log.index,\n                        term: log.term,\n                        command: log.command\n                    };\n                    dataEntries.push(entry);\n                }\n            }\n            \n            newMsg[j] = {\n                payload:{\n                    term: global.get(\"device1.currentTerm\"),\n                    leaderId: myId,\n                    sendId: sendId,\n                    prevSysLogIndex: prevSysLogIndex,\n                    prevSysLogTerm: prevSysLogTerm,\n                    prevDataLogIndex: prevDataLogIndex,\n                    prevDataLogTerm: prevDataLogTerm,\n                    leaderSysCommit: global.get(\"device1.sysCommitIndex\"),\n                    leaderDataCommit: global.get(\"device1.dataCommitIndex\"),\n                    sysEntries: sysEntries,\n                    dataEntries: dataEntries\n                }\n            };\n            j++;\n        }\n    }\n    return [newMsg];\n    \n}\n\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":350,"y":1220,"wires":[["6f9c0baf10f8bc91"]]},{"id":"a102604a.fe65c8","type":"function","z":"e8034ec0.182578","name":"isUpdateTerm","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(typeof msg.payload !== 'undefined'){\n    if(msg.payload.term > myTerm){\n        global.set(\"device1.currentTerm\", msg.payload.term);\n        global.set(\"device1.voteFor\", null);\n        global.set(\"device1.state\", \"follower\");\n    }\n    else{\n        return msg;\n    }\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1020,"y":1220,"wires":[["9fca9662.48c49","5c376bdf.4bc82c","cadd8a3.2140778","ff9f0847.173b48"]]},{"id":"9fca9662.48c49","type":"function","z":"e8034ec0.182578","name":"isSuccess","func":"var serverId = msg.payload.id;\nvar nextSysLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\");\nvar nextDataLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\");\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\n\nif(msg.payload.sysSuccess === false){\n\n    if(nextSysLogIndex - 1 > sysSnapshotIndex) {\n        nextSysLogIndex -= 1;\n    } else if (nextSysLogIndex <= sysSnapshotIndex) {\n        nextSysLogIndex = sysSnapshotIndex + 1;\n    }\n    global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\", nextSysLogIndex);\n}\nelse{\n\n    if(msg.payload.sysEntriesLen > 1) {// not heartbeat message \n        nextSysLogIndex = nextSysLogIndex + msg.payload.sysEntriesLen - 1;\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\", nextSysLogIndex);\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].matchSysLogIndex\", nextSysLogIndex-1);\n    }\n}\n\n\nif(msg.payload.dataSuccess === false){\n\n    if(nextDataLogIndex - 1 > dataSnapshotIndex) {\n        nextDataLogIndex -= 1;\n    } else if (nextDataLogIndex  <= dataSnapshotIndex) {\n        nextDataLogIndex = dataSnapshotIndex + 1;\n    }\n    global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\", nextDataLogIndex);\n}\nelse{\n\n    if(msg.payload.dataEntriesLen > 1) {\n        nextDataLogIndex = nextDataLogIndex + msg.payload.dataEntriesLen - 1;\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\", nextDataLogIndex);\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].matchDataLogIndex\", nextDataLogIndex-1);\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1260,"y":1240,"wires":[["1a3a2f43.16ff89"]]},{"id":"1a3a2f43.16ff89","type":"function","z":"e8034ec0.182578","name":"commitIndex++","func":"var devices = global.get(\"device1.devices\");\nvar nodesNum = global.get(\"device1.nodesNum\");\nvar majority = Math.round((nodesNum-1)/2);\nvar myId = global.get(\"device1.id\");\nvar myTerm = global.get(\"device1.currentTerm\");\nvar matchSysLogIndexArr = [];\nvar matchDataLogIndexArr = [];\nvar sysCommitIndex = global.get(\"device1.sysCommitIndex\");\nvar dataCommitIndex = global.get(\"device1.dataCommitIndex\");\nvar systemLog = global.get(\"device1.systemLog\");\nvar dataLog = global.get(\"device1.dataLog\");\nfor(let device of devices) {\n    if(device.id !== null && device.id != myId) {\n        matchSysLogIndexArr.push(device.matchSysLogIndex);\n        matchDataLogIndexArr.push(device.matchDataLogIndex);\n    }\n    \n}\n\nmatchSysLogIndexArr.sort((a, b) => a - b);\nmatchDataLogIndexArr.sort((a, b) => a - b);\n\nfor(let i=majority; i>=0; i--) {\n    if(matchSysLogIndexArr[i] > sysCommitIndex) {\n        for(let log of systemLog) {\n            if(log.index == matchSysLogIndexArr[i]) {\n                if(log.term == myTerm) {\n                    sysCommitIndex = matchSysLogIndexArr[i];\n                }\n                break;\n            }\n        }\n    }\n    if(matchDataLogIndexArr[i] > dataCommitIndex) {\n        for(let log of dataLog) {\n            if(log.index == matchDataLogIndexArr[i]) {\n                if(log.term == myTerm) {\n                    dataCommitIndex = matchDataLogIndexArr[i];\n                }\n                break;\n            }\n        }\n    }\n}\nglobal.set(\"device1.sysCommitIndex\", sysCommitIndex);\nglobal.set(\"device1.dataCommitIndex\", dataCommitIndex);\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1420,"y":1240,"wires":[[]]},{"id":"14b1e89c.463d47","type":"function","z":"e8034ec0.182578","name":"RPC","func":"msg.topic = \"RPC\";\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":270,"y":380,"wires":[["c8e8e64b.60ec28"]]},{"id":"5c376bdf.4bc82c","type":"function","z":"e8034ec0.182578","name":"change topic","func":"msg.topic = msg.payload.id;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1250,"y":1300,"wires":[["5f0d35de.012b5c"]]},{"id":"96868548.e8294","type":"function","z":"e8034ec0.182578","name":"isDeviceOn","func":"if(msg.payload == \"timeout\") {\n     \n    global.set(\"device1.devices[\" + (msg.topic - 100000) + \"].online\", false);\n} else {\n    \n    global.set(\"device1.devices[\" + (msg.topic - 100000) + \"].online\", true); \n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1650,"y":1300,"wires":[["683575de.cc64fc","e44b25dd.175e5"]]},{"id":"683575de.cc64fc","type":"function","z":"e8034ec0.182578","name":"assignDVAssetRequest","func":"//virtualFunc\nvar virtualFuncs = global.get(\"device1.virtualFuncs\");\n//get online devices\nvar devices = global.get(\"device1.devices\");\nvar leaderId = global.get(\"device1.leaderId\");\nvar onlineDeviceIds = {};\nvar systemLog = global.get(\"device1.systemLog\");\nvar prevLogIndex = systemLog[systemLog.length-1].index;\nvar term = global.get(\"device1.currentTerm\");\n\n\n// snapshot here\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\n// hardcoded functions (number)\nvar currvirtualFuncs0 = global.get(\"device1.virtualFuncs[0].device\");\nvar currvirtualFuncs1 = global.get(\"device1.virtualFuncs[1].device\");\n\nvar sysLastApplied = global.get(\"device1.sysLastApplied\");\nvar sysSnapshotTH = global.get(\"device1.sysSnapshotTH\");\nif(sysLastApplied - sysSnapshotIndex > sysSnapshotTH) {\n    var logAfterSnapshot = [];\n    var newSysSnapshotTerm = -1;\n    for(let log of systemLog) {\n        if(log.index == sysLastApplied){\n            newSysSnapshotTerm = log.term;\n            let newFirstLog = {\n                index: sysLastApplied,\n                term: newSysSnapshotTerm,\n                command: null\n            };\n            logAfterSnapshot.push(newFirstLog);\n        } else if(log.index > sysLastApplied) {\n            logAfterSnapshot.push(log);\n        }\n    }\n    global.set(\"device1.sysSnapshot.index\",sysLastApplied);\n    global.set(\"device1.sysSnapshot.term\",newSysSnapshotTerm);\n    global.set(\"device1.sysSnapshot.virtualFuncs[0].device\",currvirtualFuncs0);\n    global.set(\"device1.sysSnapshot.virtualFuncs[1].device\",currvirtualFuncs1);\n    systemLog = logAfterSnapshot;\n    \n}\n\n// check for online devices\nfor(let device of devices) {\n    if(device.online === true) {\n        onlineDeviceIds[\"\"+device.id] = 0;\n    }\n}\n\n// identify current workload\n// for loops tauschen, leader +1 nur beim loopen durch devices\nfor(let deviceId in onlineDeviceIds) {\n    \n    if (deviceId == leaderId) {\n        onlineDeviceIds[\"\"+deviceId] += 1;\n    }\n    \n    for(let virtualFunc of virtualFuncs) {\n        if(deviceId == virtualFunc.device) {\n            onlineDeviceIds[\"\"+deviceId] += 1;\n        }\n    }  \n}\n\n// reassign functions\nvar j = 0;\nfor(let virtualFunc of virtualFuncs) {\n    let isWorking = false;\n    // own id and workload\n    let relativeFreeDeviceId = global.get(\"device1.id\");\n    let workload = onlineDeviceIds[\"\"+relativeFreeDeviceId];//\n    for(let deviceId in onlineDeviceIds) {\n        if(deviceId == virtualFunc.device) {\n            isWorking = true;\n        }\n    }\n    // if function is not assigned/working\n    if(!isWorking) {\n        for(let deviceId in onlineDeviceIds) {\n            // check if other devices have a smaller workload than self\n            if(onlineDeviceIds[deviceId] < workload) {\n                workload = onlineDeviceIds[deviceId];\n                relativeFreeDeviceId = parseInt(deviceId); // get min\n            }\n        }\n        onlineDeviceIds[\"\"+relativeFreeDeviceId] += 1;\n        \n        //node.warn(relativeFreeDeviceId);\n        \n        let command = \"d\" + (relativeFreeDeviceId-100000) + \"vf\" + j;\n        let entry = {\n            index: prevLogIndex + 1,\n            term: term,\n            command: command\n        }\n        systemLog.push(entry);\n        prevLogIndex += 1;\n    }\n    j++;\n}\n\nglobal.set(\"device1.systemLog\", systemLog);\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1690,"y":1380,"wires":[["d8f7d54a.783cf8"]]},{"id":"7a15a110.bac49","type":"function","z":"e8034ec0.182578","name":"state machine","func":"var sysCommitIndex = global.get(\"device1.sysCommitIndex\");\nvar sysLastApplied = global.get(\"device1.sysLastApplied\");\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\nif (sysCommitIndex > sysLastApplied) { // execute command //how about roll back\n    if(sysLastApplied < sysSnapshotIndex) { // execute snapshot\n        var sysSnapshotVirtualFuncs = global.get(\"device1.sysSnapshot.virtualFuncs\");\n        global.set(\"device1.virtualFuncs\", sysSnapshotVirtualFuncs);\n        global.set(\"device1.sysLastApplied\", sysSnapshotIndex);\n    } else {\n        var systemLog = global.get(\"device1.systemLog\");\n        var command = null;\n        \n        for(let log of systemLog) {\n            if(log.index == sysLastApplied+1) {\n                command = log.command;\n                //node.warn(\"command:\");\n                //node.warn(log.command);\n                break;\n            }\n        }\n        \n        if(command !== null) {\n            var pattern = \"(?:d)([0-9]*)(?:vf)([0-9]*)\";\n            var deviceId = parseInt(command.match(pattern)[1])+100000;\n            var vfId = parseInt(command.match(pattern)[2]);\n            global.set(\"device1.virtualFuncs[\"+vfId+\"].device\", deviceId);\n            sysLastApplied += 1;\n            global.set(\"device1.sysLastApplied\", sysLastApplied);\n            //node.warn(\"DeviceID: \" + deviceId);\n            //node.warn(\"vfId: \" + vfId);\n            //var test = command.match(pattern);\n        }\n    }\n\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":320,"y":1380,"wires":[["cd125a54.98e9"]]},{"id":"220404b7.2bf64c","type":"function","z":"e8034ec0.182578","name":"assignDVAsset","func":"msg = {\n    payload: {\n        id: global.get(\"device1.id\"),\n        virtualFunctions: global.get(\"device1.virtualFuncs\")\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":680,"y":1380,"wires":[["f7de9d89.d7bbb8","954c09e32251cddd"]]},{"id":"cd125a54.98e9","type":"function","z":"e8034ec0.182578","name":"isLeader","func":"if(global.get(\"device1.state\") == \"leader\"){ \n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":520,"y":1380,"wires":[["220404b7.2bf64c"]]},{"id":"4cebd161.848db8","type":"function","z":"e8034ec0.182578","name":"data processor","func":"\nvar dataCommitIndex = global.get(\"device1.dataCommitIndex\");\nvar dataLastApplied = global.get(\"device1.dataLastApplied\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\nif (dataCommitIndex > dataLastApplied) { // execute command //how about roll back\n    if(dataLastApplied < dataSnapshotIndex) {\n        // no need to set payload, since leader have send it to control device\n        // TODO: delete current database and duplicate leader's database\n        global.set(\"device1.dataLastApplied\", dataSnapshotIndex);\n        \n    }\n    else {\n        var dataLog = global.get(\"device1.dataLog\");\n        var command = null;\n        for(let log of dataLog) {\n            if(log.index == dataLastApplied + 1) {\n                command = log.command;\n                break;\n            }\n        }\n        if(command !== null) {\n            // hardcoded data command pattern\n            //var pattern = \"(?:s)([0-9]*)(?:m1)([0-9]*)(?:m2)([0-9]*)(?:ts)([0-9]*)\";\n            //var s = command.match(pattern)[1];\n            //var m1 = command.match(pattern)[2];\n            //var m2 = command.match(pattern)[3];\n            //var ts = command.match(pattern)[4];\n            //global.set(\"device1.timestamp\", ts);\n            // hardcoded sql statement to store results in DB\n            //msg.topic = \"INSERT IGNORE INTO states (states, measurement1, measurement2, time) VALUES (\" + s + \",\" + m1 + \", \" + m2 + \", \" + ts + \");\";\n            msg.payload = {\n                command\n            }\n            //node.warn(command);\n            //node.warn(command.split(',').map(Number));\n            \n            dataLastApplied += 1;\n            global.set(\"device1.dataLastApplied\", dataLastApplied);      \n            return msg;\n        }\n    }\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":320,"y":1560,"wires":[["e85be469.ba8498","3eb17029.4cd0d8"]]},{"id":"d8f7d54a.783cf8","type":"function","z":"e8034ec0.182578","name":"persistent storage","func":"msg.payload = {\n    currentTerm: global.get(\"device1.currentTerm\"),\n    voteFor: global.get(\"device1.voteFor\"),\n    systemLog: global.get(\"device1.systemLog\"),\n    dataLog: global.get(\"device1.dataLog\"),\n    sysSnapshot: global.get(\"device1.sysSnapshot\"),\n    dataSnapshot: global.get(\"device1.dataSnapshot\")\n};\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1910,"y":1380,"wires":[["7ffbb6e1.7a9dd8"]]},{"id":"7ffbb6e1.7a9dd8","type":"file","z":"e8034ec0.182578","name":"","filename":"/home/pi/Desktop/device1","appendNewline":false,"createDir":true,"overwriteFile":"true","encoding":"none","x":2130,"y":1380,"wires":[[]]},{"id":"ff9f0847.173b48","type":"function","z":"e8034ec0.182578","name":"SendSysSnapshot","func":"var serverId = msg.payload.id;\nvar nextSysLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\");\n\n//var sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\n// snapshot here\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\nvar syscount = flow.get(\"syscount\") || 1;\n\nif (syscount < 5) {\n    node.warn(\"SendSysSnapshotNode:\");\n    node.warn(msg.payload.sysSuccess);\n    node.warn(nextSysLogIndex);\n    node.warn(sysSnapshotIndex);\n}\n\nsyscount++;\n\nflow.set(\"syscount\",syscount);\n\n\n//if(msg.payload.sysSuccess === false && nextSysLogIndex - 1 == sysSnapshotIndex) {\nif(nextSysLogIndex - 1 == sysSnapshotIndex) {\n    msg.payload = {\n        leaderId: global.get(\"device1.id\"),\n        sendId: serverId,\n        term: global.get(\"device1.currentTerm\"),\n        lastIncludedIndex: global.get(\"device1.sysSnapshot.index\"),\n        lastIncludedTerm: global.get(\"device1.sysSnapshot.term\"),\n        virtualFunctions: global.get(\"device1.sysSnapshot.virtualFuncs\")\n        \n    }\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1270,"y":1140,"wires":[["1506bd50e6d17b03"]]},{"id":"cadd8a3.2140778","type":"function","z":"e8034ec0.182578","name":"SendDataSnapshotCheck","func":"var serverId = msg.payload.id;\nvar nextDataLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\nif(msg.payload.dataSuccess === false && nextDataLogIndex - 1 == dataSnapshotIndex) {\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1290,"y":1000,"wires":[["e6876b38.23ad6"]]},{"id":"90cc26d4.0b84b","type":"function","z":"e8034ec0.182578","name":"UpdateSysSnapshot","func":"var myTerm = global.get(\"device1.currentTerm\");\n\nif(msg.payload.term < myTerm) {\n    msg.payload = {\n        term: myTerm\n    }\n} else {\n    var systemLog = global.get(\"device1.systemLog\");\n    var lastLogIndex = systemLog[systemLog.length-1].index;\n    var newSystemLog = [];\n    var firstLog = {\n        index:msg.payload.lastIncludedIndex,\n        term: msg.payload.lastIncludedTerm,\n        command: null\n    }; \n    newSystemLog.push(firstLog);\n    global.set(\"device1.sysSnapshot.index\", msg.payload.lastIncludedIndex);\n    global.set(\"device1.sysSnapshot.term\", msg.payload.lastIncludedTerm);\n    global.set(\"device1.sysSnapshot.virtualFuncs\", msg.payload.virtualFunctions);\n    if(lastLogIndex > msg.payload.lastIncludedIndex) {\n        for(let log of systemLog) {\n            if(log.index > msg.payload.lastIncludedIndex) {\n                newSystemLog.push(log);\n            }\n        }\n    }\n    \n    global.set(\"device1.systemLog\", newSystemLog);\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":700,"y":840,"wires":[["5703d621e5907de8"]]},{"id":"619d09e2.17e938","type":"function","z":"e8034ec0.182578","name":"UpdateDataSnapshot","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(msg.payload.term < myTerm) {\n    msg.payload = {\n        term: myTerm\n    }\n} else {\n    var dataLog = global.get(\"device1.dataLog\");\n    var lastLogIndex = dataLog[dataLog.length-1].index;\n    var newDataLog = [];\n    var firstLog = {\n        index:msg.payload.lastIncludedIndex,\n        term: msg.payload.lastIncludedTerm,\n        command: null\n    }; \n    newDataLog.push(firstLog);\n    global.set(\"device1.dataSnapshot.index\", msg.payload.lastIncludedIndex);\n    global.set(\"device1.dataSnapshot.term\", msg.payload.lastIncludedTerm);\n    global.set(\"device1.dataSnapshot.timestamp\", msg.payload.ts);\n    if(lastLogIndex > msg.payload.lastIncludedIndex) {\n        for(let log of dataLog) {\n            if(log.index > msg.payload.lastIncludedIndex) {\n                newDataLog.push(log);\n            }\n        }\n    }\n    \n    global.set(\"device1.dataLog\", newDataLog);\n    \n    msg.payload = {\n        term: myTerm\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":700,"y":880,"wires":[["5703d621e5907de8"]]},{"id":"658fc2f4.1026bc","type":"function","z":"e8034ec0.182578","name":"UpdateTerm","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(msg.payload.term > myTerm) {\n    global.set(\"device1.currentTerm\", myTerm);\n    global.set(\"device1.state\", \"follower\");\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":2650,"y":1060,"wires":[[]]},{"id":"110fab30.51d07d","type":"function","z":"e8034ec0.182578","name":"add data command","func":"var lastTimestamp = flow.get(\"lastTimestamp\") || 0;\nnow = parseInt(Date.now());\nif(now > lastTimestamp) {\n    // hardcoded structure of data command\n    var command = msg.payload;\n    var dataLog = global.get(\"device1.dataLog\");\n    var prevLogIndex = dataLog[dataLog.length-1].index;\n    var term = global.get(\"device1.currentTerm\");\n    \n    // snapshot here\n    var dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\n    \n    var dataLastApplied = global.get(\"device1.dataLastApplied\");\n    var dataSnapshotTH = global.get(\"device1.dataSnapshotTH\");\n    if(dataLastApplied - dataSnapshotIndex > dataSnapshotTH) {\n        var logAfterSnapshot = [];\n        var newDataSnapshotTerm = -1;\n        for(let log of dataLog) {\n            if(log.index == dataLastApplied){\n                newDataSnapshotTerm = log.term;\n                let newFirstLog = {\n                    index: dataLastApplied,\n                    term: newDataSnapshotTerm,\n                    command: null\n                };\n                logAfterSnapshot.push(newFirstLog);\n            } else if(log.index > dataLastApplied) {\n                logAfterSnapshot.push(log);\n            }\n        }\n        global.set(\"device1.dataSnapshot.index\",dataLastApplied);\n        global.set(\"device1.dataSnapshot.term\",newDataSnapshotTerm);\n        global.set(\"device1.dataSnapshot.command\",command);\n        dataLog = logAfterSnapshot;\n        \n    }\n    \n    var entry = {\n            index: prevLogIndex + 1,\n            term: term,\n            command: command\n        }\n    dataLog.push(entry);\n    global.set(\"device1.dataLog\", dataLog);\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":470,"y":1840,"wires":[["20db4fdb.0a2318","6f37cb10.82e28c","19ab3a15.aa5d8e"]]},{"id":"20db4fdb.0a2318","type":"function","z":"e8034ec0.182578","name":"persistent storage","func":"msg.payload = {\n    currentTerm: global.get(\"device1.currentTerm\"),\n    voteFor: global.get(\"device1.voteFor\"),\n    systemLog: global.get(\"device1.systemLog\"),\n    dataLog: global.get(\"device1.dataLog\"),\n    sysSnapshot: global.get(\"device1.sysSnapshot\"),\n    dataSnapshot: global.get(\"device1.dataSnapshot\")\n};\nreturn 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}\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":350,"y":1720,"wires":[[]]},{"id":"3603e552.3536ea","type":"split","z":"e8034ec0.182578","name":"split","splt":"10","spltType":"len","arraySplt":"10","arraySpltType":"len","stream":false,"addname":"","x":930,"y":1880,"wires":[["a0fa6158.213458"]]},{"id":"a0fa6158.213458","type":"switch","z":"e8034ec0.182578","name":"","property":"payload","propertyType":"msg","rules":[{"t":"index","v":"0","vt":"num","v2":"0","v2t":"num"},{"t":"index","v":"1","vt":"num","v2":"1","v2t":"num"},{"t":"index","v":"2","vt":"num","v2":"2","v2t":"num"}],"checkall":"true","repair":false,"outputs":3,"x":1090,"y":1880,"wires":[["8491bef5.a35f98"],["7198942e.f5b2c4"],["c40085a686a1f474"]]},{"id":"b07e41ef.2a8b58","type":"postgres","z":"e8034ec0.182578","postgresdb":"3d5ce28770ed0d20","name":"vpp","output":false,"outputs":0,"x":1630,"y":1920,"wires":[]},{"id":"6f37cb10.82e28c","type":"function","z":"e8034ec0.182578","name":"","func":"var dataLog 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power=Math.ceil(Math.random()*20)+90;\n    }\n    measurements.push(power);\n}\n\nmeasurements.push(timestamp);\n\nmsg.payload = measurements\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":100,"wires":[["5687ca1b485d3cab"]]},{"id":"cf757ad1.575d","type":"inject","z":"6d95b6d3.106588","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":220,"wires":[["10720989.b356e6"]]},{"id":"77710a4c.3cb504","type":"inject","z":"6d95b6d3.106588","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":300,"wires":[["507fff78.6af578"]]},{"id":"10720989.b356e6","type":"function","z":"6d95b6d3.106588","name":"","func":"flow.set(\"failure\", true)","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":300,"y":220,"wires":[[]]},{"id":"507fff78.6af578","type":"function","z":"6d95b6d3.106588","name":"","func":"flow.set(\"failure\", false)","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":300,"y":300,"wires":[[]]},{"id":"940e198e.53ff28","type":"comment","z":"6d95b6d3.106588","name":"Set failure","info":"","x":160,"y":180,"wires":[]},{"id":"5e06091a.1781b8","type":"comment","z":"6d95b6d3.106588","name":"Remove failure","info":"","x":180,"y":260,"wires":[]},{"id":"5687ca1b485d3cab","type":"function","z":"6d95b6d3.106588","name":"set host/port","func":"var len = global.get(\"device1.nodesNum\") || 1;\nvar myId = global.get(\"device1.id\");\nvar prefix = global.get(\"device1.hostname_prefix\");\nvar suffix = global.get(\"device1.hostname_suffix\");\n\nvar newMsg = new Array(len-1);\n\nfor (i= 0; i<len;i++) {\n    let clone = JSON.parse(JSON.stringify(msg));\n    newMsg[i] = clone;\n    newMsg[i].host = prefix + (i+1) + suffix;\n    newMsg[i].port = \"9057\";\n    newMsg[i].sendId = 100001+i;\n}\n\nreturn [newMsg];","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":570,"y":100,"wires":[["fea4e60940d46592"]]},{"id":"fea4e60940d46592","type":"tcp request","z":"6d95b6d3.106588","name":"","server":"","port":"","out":"time","ret":"string","splitc":"0","newline":"","tls":"","x":710,"y":100,"wires":[[]]},{"id":"9963bb2c3e7fd4f0","type":"comment","z":"6d95b6d3.106588","name":"Create Data","info":"","x":170,"y":60,"wires":[]}]
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\"[\" + msg.payload + \"]\"\n}\nreturn newMsg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":520,"y":260,"wires":[["1d979cd2.bd172b"]]},{"id":"8cfc218d.653c98","type":"function","z":"e8034ec0.182578","name":"Init. params","func":"// hardcoded device ID\nglobal.set(\"device1.id\",100001);\nglobal.set(\"device1.hostname_prefix\",\"tmp\");\nglobal.set(\"device1.hostname_suffix\",\"tmp\");\n\nglobal.set(\"device1.hostname\",global.get(\"device1.hostname_prefix\")+(global.get(\"device1.id\") - 100000)+ global.get(\"device1.hostname_suffix\"))\n\n// set initial state to follower\nglobal.set(\"device1.state\", \"follower\");\nvar randomWait =  Math.ceil(Math.random()*5)+1;\nglobal.set(\"device1.randomWait\", randomWait);\n// indices and thresholds\nglobal.set(\"device1.sysCommitIndex\",1);\nglobal.set(\"device1.dataCommitIndex\",1);\nglobal.set(\"device1.sysSnapshotTH\",5);\nglobal.set(\"device1.dataSnapshotTH\",30);\nglobal.set(\"device1.sysLastApplied\",0);\nglobal.set(\"device1.dataLastApplied\",0);\nglobal.set(\"device1.timestamp\",0);\nglobal.set(\"device1.leaderId\", null);\n\n// hardcoded number of devices\nglobal.set(\"device1.nodesNum\",6);\nvar len = global.get(\"device1.nodesNum\");\n\n// hardcoded functions\nglobal.set(\"device1.virtualFuncs[0].name\", \"FaultLoc\"); \nglobal.set(\"device1.virtualFuncs[0].device\", null); // value device id\nglobal.set(\"device1.virtualFuncs[1].name\", \"ServiceRes\"); \nglobal.set(\"device1.virtualFuncs[1].device\", null); \n\n// Device 0\nglobal.set(\"device1.devices[0].id\", null);\nglobal.set(\"device1.devices[0].online\", null);\nglobal.set(\"device1.devices[0].ip\", null);\nglobal.set(\"device1.devices[0].port\", 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msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1050,"y":260,"wires":[["c8e8e64b.60ec28"]]},{"id":"c8e8e64b.60ec28","type":"function","z":"e8034ec0.182578","name":"timeout","func":"var myTerm = global.get(\"device1.currentTerm\");\nvar myId = global.get(\"device1.id\");\n\nif(msg.topic.includes(\"start\") || msg.topic.includes(\"myRequestVoteRPC\")){ // start timer\n    context.set('count',0);\n    msg.payload = { \n        \"payload\": \"on\", \n        \"warning\": 0,\n        \"timeout\": global.get('device1.randomWait')\n    };\n    return msg;\n} \nelse if(msg.topic.includes(\"RPC\") && msg.payload.term >= myTerm){ //RPC from leader or candidate, to reactivate\n    msg.payload = { \n        \"payload\": \"on\", \n        \"warning\": 0,\n        \"timeout\": global.get('device1.randomWait')\n    };\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":660,"y":380,"wires":[["9f80a15f.bb2a98"]]},{"id":"5b97fc86.32033c","type":"function","z":"e8034ec0.182578","name":"updateParams","func":"if(msg.payload === \"off\"){\n    // random wait\n    var randomWait =  Math.ceil(Math.random()*5)+1;\n    flow.set(\"voteCount\", 1); // vote for self, count ++\n    global.set(\"device1.randomWait\", randomWait);\n    global.set(\"device1.state\", \"candidate\");\n    global.set(\"device1.currentTerm\", global.get(\"device1.currentTerm\")+1);\n    global.set(\"device1.voteFor\", global.get(\"device1.id\"));\n    msg = {\n        topic:\"myRequestVoteRPC\"\n    }\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":360,"y":520,"wires":[["473f8dd.9f0d274","c8e8e64b.60ec28"]]},{"id":"2677e779.36a628","type":"function","z":"e8034ec0.182578","name":"leaderInit","func":"var nextSysLogIndex = global.get(\"device1.systemLog\").length;\nvar nextDataLogIndex = global.get(\"device1.dataLog\").length;\nvar myId = global.get(\"device1.id\");\nvar len = global.get(\"device1.nodesNum\");\n\nfor(var i=1; i<=len; i++){\n    if(i != (myId-100000)){\n        global.set(\"device1.devices[\"+i+\"].nextSysLogIndex\",nextSysLogIndex);\n        global.set(\"device1.devices[\"+i+\"].nextDataLogIndex\",nextDataLogIndex);\n        global.set(\"device1.devices[\"+i+\"].matchSysLogIndex\",0);\n        global.set(\"device1.devices[\"+i+\"].matchDataLogIndex\",0);\n        global.set(\"device1.devices[\"+i+\"].online\",false);\n    } else {\n        global.set(\"device1.devices[\"+i+\"].online\",true);\n    }\n}\n  \n    \n// set leader\nglobal.set(\"device1.state\", \"leader\");\nglobal.set(\"device1.leaderId\", myId);\nreturn msg;\n\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1340,"y":580,"wires":[[]]},{"id":"7ee6d5c.ae9d22c","type":"function","z":"e8034ec0.182578","name":"isVote","func":"var sysLogLen = global.get(\"device1.systemLog\").length-1;\nvar dataLogLen = global.get(\"device1.dataLog\").length-1;\nvar mySysLogTerm = global.get(\"device1.systemLog[\"+sysLogLen+\"].term\");\nvar mySysLogIndex = global.get(\"device1.systemLog[\"+sysLogLen+\"].index\");\nvar myDataLogTerm = global.get(\"device1.dataLog[\"+dataLogLen+\"].term\");\nvar myDataLogIndex = global.get(\"device1.dataLog[\"+dataLogLen+\"].index\");\nvar myTerm = global.get(\"device1.currentTerm\");\nvar myVote = global.get(\"device1.voteFor\");\nvar myId = global.get(\"device1.id\");\nvar candidateId = msg.payload.candidateId;\nvar lastSysLogTerm = msg.payload.lastSysLogTerm;\nvar lastSysLogIndex = msg.payload.lastSysLogIndex;\nvar lastDataLogTerm = msg.payload.lastDataLogTerm;\nvar lastDataLogIndex = msg.payload.lastDataLogIndex;\nvar term = msg.payload.term;\nvar isVote = false;\n\n// safety 5.4.1\nif(lastSysLogTerm > mySysLogTerm && lastDataLogTerm > myDataLogTerm) {\n    isVote = true;\n} else if (lastSysLogTerm >= mySysLogTerm && lastDataLogTerm >= myDataLogTerm){\n    if(lastSysLogIndex >= mySysLogIndex && lastDataLogIndex >= myDataLogIndex) {\n        isVote = true;\n    }\n}\n\nif(myTerm < term) {\n    myTerm = term;\n    global.set(\"device1.state\", \"follower\");\n    global.set(\"device1.voteFor\", null);\n    myVote = null;\n    global.set(\"device1.currentTerm\", myTerm);\n} else if(myTerm > term) {\n    isVote = false;\n}\n\nif(isVote && (myVote === null || myVote == candidateId)) {\n    newMsg = {\n            payload: {\n                id: myId,\n                term: myTerm,\n                voteGranted: true\n            }\n    }\n    global.set(\"device1.voteFor\", candidateId);\n    \n} else {\n    newMsg = {\n        payload: {\n            id: myId,\n            term: myTerm,\n            voteGranted: false\n        }\n    }\n}\n\nmsg.payload = newMsg.payload;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":670,"y":720,"wires":[["5703d621e5907de8"]]},{"id":"17745a55.895cfe","type":"function","z":"e8034ec0.182578","name":"replyToLeader","func":"if (msg.payload.term > global.get(\"device1.currentTerm\")){// discover higher term\n\n    node.warn(\"ReplyToLeader: Back to follower\");\n\n    global.set(\"device1.currentTerm\", msg.payload.term);\n    global.set(\"device1.voteFor\", null);\n    global.set(\"device1.state\", \"follower\"); // back to follower\n    \n} else if (global.get(\"device1.state\") == \"candidate\" && msg.payload.term == global.get(\"device1.currentTerm\")) { \n    global.set(\"device1.state\", \"follower\"); ////candidate discovers current leader,  back to follower\n    \n    node.warn(\"ReplyToLeader: Candidate to follower\");   \n\n} else if (msg.payload.term < global.get(\"device1.currentTerm\")) {\n\n    node.warn(\"ReplyToLeader: MSG.TERM smaller than current TERM\");\n\n    let newPayload = {\n            id: global.get(\"device1.id\"),\n            term: global.get(\"device1.currentTerm\"),\n            sysSuccess: false,\n            dataSuccess: false,\n            sysEntriesLen: msg.payload.sysEntries.length,\n            dataEntriesLen: msg.payload.dataEntries.length\n        }\n\n    msg.payload = newPayload;\n    return msg;\n}\n\nif(global.get(\"device1.state\") == \"follower\"){\n    global.set(\"device1.leaderId\", msg.payload.leaderId); \n    var myId = global.get(\"device1.id\");\n    var myTerm = global.get(\"device1.currentTerm\");\n    var mySystemLog = global.get(\"device1.systemLog\");\n    var myDataLog = global.get(\"device1.dataLog\");\n    var sysSuccess = false;\n    var dataSuccess = false;\n    var sysCommitIndex = Math.min(msg.payload.leaderSysCommit, mySystemLog[mySystemLog.length-1].index);\n    var dataCommitIndex = Math.min(msg.payload.leaderDataCommit, myDataLog[myDataLog.length-1].index)\n    global.set(\"device1.sysCommitIndex\", sysCommitIndex);\n    global.set(\"device1.dataCommitIndex\", dataCommitIndex);\n    var newSysLog = [];\n    var newDataLog = [];\n    \n    // snapshot here\n    var sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n    var sysLastApplied = global.get(\"device1.sysLastApplied\");\n    var currvirtualFuncs0 = global.get(\"device1.virtualFuncs[0].device\");\n    var currvirtualFuncs1 = global.get(\"device1.virtualFuncs[1].device\");\n    var sysSnapshotTH = global.get(\"device1.sysSnapshotTH\");\n    if(sysLastApplied - sysSnapshotIndex > sysSnapshotTH) {\n        let logAfterSnapshot = [];\n        let newSysSnapshotTerm = -1;\n        for(let log of mySystemLog) {\n            if(log.index == sysLastApplied){\n                newSysSnapshotTerm = log.term;\n                let newFirstLog = {\n                    index: sysLastApplied,\n                    term: newSysSnapshotTerm,\n                    command: null\n                };\n                logAfterSnapshot.push(newFirstLog);\n            } else if(log.index > sysLastApplied) {\n                logAfterSnapshot.push(log);\n            }\n        }\n        global.set(\"device1.sysSnapshot.index\",sysLastApplied);\n        global.set(\"device1.sysSnapshot.term\",newSysSnapshotTerm);\n        global.set(\"device1.sysSnapshot.virtualFuncs[0].device\",currvirtualFuncs0);\n        global.set(\"device1.sysSnapshot.virtualFuncs[1].device\",currvirtualFuncs1);\n        mySystemLog = logAfterSnapshot;\n        global.set(\"device1.systemLog\",mySystemLog);\n        \n    }\n    \n    var dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\n    var dataLastApplied = global.get(\"device1.dataLastApplied\");\n    var currTs = global.get(\"device1.timestamp\");\n    var dataSnapshotTH = global.get(\"device1.dataSnapshotTH\");\n    if(dataLastApplied - dataSnapshotIndex > dataSnapshotTH) {\n        let logAfterSnapshot = [];\n        let newDataSnapshotTerm = -1;\n        for(let log of myDataLog) {\n            if(log.index == dataLastApplied){\n                newDataSnapshotTerm = log.term;\n                let newFirstLog = {\n                    index: dataLastApplied,\n                    term: newDataSnapshotTerm,\n                    command: null\n                };\n                logAfterSnapshot.push(newFirstLog);\n                node.warn(\"Pushing empty log\");\n            } else if(log.index > dataLastApplied) {\n                logAfterSnapshot.push(log);\n                node.warn(\"Pushing non-empty log\");\n            }\n        }\n        global.set(\"device1.dataSnapshot.index\",dataLastApplied);\n        global.set(\"device1.dataSnapshot.term\",newDataSnapshotTerm);\n        global.set(\"device1.dataSnapshot.timestamp\",currTs);\n        myDataLog = logAfterSnapshot;\n        global.set(\"device1.dataLog\",myDataLog);\n        \n    }\n    \n    \n    \n    for (let log of mySystemLog){\n        newSysLog.push(log);\n        if(log.index == msg.payload.prevSysLogIndex) {\n            if(log.term == msg.payload.prevSysLogTerm) {\n                //  mySysLog until prevSysLogIndex(newSysLog) + sysEntries in AppendEntries RPC\n                if(msg.payload.sysEntries.length > 1) { // sysEntriesNotNull\n                    global.set(\"device1.systemLog\", newSysLog.concat(msg.payload.sysEntries.slice(1, msg.payload.sysEntries.length)));\n                }\n                sysSuccess = true;\n            }\n            break;\n        } \n    }\n\n    for (let log of myDataLog){\n        newDataLog.push(log);\n        if(log.index == msg.payload.prevDataLogIndex) {\n            if(log.term == msg.payload.prevDataLogTerm) {\n                if(msg.payload.dataEntries.length > 1) { // dataEntriesNotNull\n                    global.set(\"device1.dataLog\", newDataLog.concat(msg.payload.dataEntries.slice(1, msg.payload.dataEntries.length)));\n                }\n                dataSuccess = true;\n            }\n            break;\n        } \n    }\n    \n    let newPayload = {\n            id: global.get(\"device1.id\"),\n            term: global.get(\"device1.currentTerm\"),\n            sysSuccess: sysSuccess,\n            dataSuccess: dataSuccess,\n            sysEntriesLen: msg.payload.sysEntries.length,\n            dataEntriesLen: msg.payload.dataEntries.length\n        }\n\n    msg.payload = newPayload;\n    return msg;\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":700,"y":680,"wires":[["626db20f.d92afc","5703d621e5907de8"]]},{"id":"626db20f.d92afc","type":"function","z":"e8034ec0.182578","name":"persistent storage","func":"msg.payload = {\n    currentTerm: global.get(\"device1.currentTerm\"),\n    voteFor: global.get(\"device1.voteFor\"),\n    systemLog: global.get(\"device1.systemLog\"),\n    dataLog: global.get(\"device1.dataLog\"),\n    sysSnapshot: global.get(\"device1.sysSnapshot\"),\n    dataSnapshot: global.get(\"device1.dataSnapshot\")\n};\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":970,"y":680,"wires":[["9d92fc1d.4fbb2"]]},{"id":"9d92fc1d.4fbb2","type":"file","z":"e8034ec0.182578","name":"","filename":"/home/pi/Desktop/device1","appendNewline":false,"createDir":true,"overwriteFile":"true","encoding":"none","x":1190,"y":680,"wires":[[]]},{"id":"473f8dd.9f0d274","type":"function","z":"e8034ec0.182578","name":"RequestVoteRPC","func":"var sysLogLen = global.get(\"device1.systemLog\").length-1;\nvar dataLogLen = global.get(\"device1.dataLog\").length-1;\n\nvar newMsg = {\n    payload:{\n        term: global.get(\"device1.currentTerm\"),\n        candidateId: global.get(\"device1.id\"),\n        lastSysLogIndex: global.get(\"device1.systemLog[\"+sysLogLen+\"].index\"),\n        lastSysLogTerm: global.get(\"device1.systemLog[\"+sysLogLen+\"].term\"),\n        lastDataLogIndex: global.get(\"device1.dataLog[\"+dataLogLen+\"].index\"),\n        lastDataLogTerm: global.get(\"device1.dataLog[\"+dataLogLen+\"].term\")\n    }\n};\n\nreturn newMsg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":610,"y":520,"wires":[["5f8746972ea09559"]]},{"id":"3e3a97b7.c7f7b","type":"function","z":"e8034ec0.182578","name":"results recv","func":"var myTerm = global.get(\"device1.currentTerm\");\nvar voteCount = flow.get(\"voteCount\");\nvar nodesNum = global.get(\"device1.nodesNum\");\n\nif (typeof msg.payload != \"undefined\") {\n    if(msg.payload.voteGranted && msg.payload.term == myTerm) {\n        voteCount += 1;\n        flow.set(\"voteCount\", voteCount);\n    } else if (msg.payload.term > myTerm) {\n        flow.set(\"voteCount\", 0);\n    }\n}\n\nif(voteCount >= (nodesNum+1)/2 ) {\n    flow.set(\"voteCount\", 0);\n    msg.payload = { \n        \"payload\": \"cancel\" // cancel timer\n    };\n    return msg; // leader Init\n}\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1150,"y":580,"wires":[["2677e779.36a628","9f80a15f.bb2a98","82ba0c9b.becd58"]]},{"id":"507503c7.60aaa4","type":"inject","z":"e8034ec0.182578","name":"heartbeats","props":[{"p":"payload.heartbeat","vt":"bool","v":"true"},{"p":"topic","vt":"str"}],"repeat":"1","crontab":"","once":true,"onceDelay":"0.1","topic":"","x":150,"y":1240,"wires":[["878781ba.aef818","7a15a110.bac49","4cebd161.848db8","9a1bba8b.93412","454e8a3cfd7fdbd8"]]},{"id":"878781ba.aef818","type":"function","z":"e8034ec0.182578","name":"isLeader & AppendEntries","func":"var len = global.get(\"device1.nodesNum\") || 1;\nvar newMsg = new Array(len-1);\nvar mySystemLog = global.get(\"device1.systemLog\");\nvar myDataLog = global.get(\"device1.dataLog\");\nvar myId = global.get(\"device1.id\");\nvar myState = global.get(\"device1.state\");\nvar j = 0;\n\nif(myState == \"leader\"){ //I'm leader\n    for(var i=1; i<=len; i++){\n        var sendId=100000 + i;\n        if(sendId != myId){\n            var dataEntries = [];\n            var sysEntries = [];\n            var entry = {\n                        index: -1,\n                        term: -1,\n                        command: \" \"\n            };\n            sysEntries.push(entry); // add this for protobuf encode/decode\n            dataEntries.push(entry);\n            var prevSysLogIndex = global.get(\"device1.devices[\"+i+\"].nextSysLogIndex\")-1;\n            var prevSysLogTerm = -1; // after iter. still -1? -> in snapshot\n            var prevDataLogIndex = global.get(\"device1.devices[\"+i+\"].nextDataLogIndex\")-1;\n            var prevDataLogTerm = -1; // after iter. still -1? -> in snapshot\n            \n\n            for (let log of mySystemLog){\n                if(log.index == prevSysLogIndex) {\n                    prevSysLogTerm = log.term;\n                } else if (log.index > prevSysLogIndex){\n                    entry = {\n                        index: log.index,\n                        term: log.term,\n                        command: log.command\n                    };\n                    sysEntries.push(entry);\n                }\n            }\n            for (let log of myDataLog) {\n                if(log.index == prevDataLogIndex) {\n                    prevDataLogTerm = log.term;\n                } else if (log.index > prevDataLogIndex){\n                    entry = {\n                        index: log.index,\n                        term: log.term,\n                        command: log.command\n                    };\n                    dataEntries.push(entry);\n                }\n            }\n            \n            newMsg[j] = {\n                payload:{\n                    term: global.get(\"device1.currentTerm\"),\n                    leaderId: myId,\n                    sendId: sendId,\n                    prevSysLogIndex: prevSysLogIndex,\n                    prevSysLogTerm: prevSysLogTerm,\n                    prevDataLogIndex: prevDataLogIndex,\n                    prevDataLogTerm: prevDataLogTerm,\n                    leaderSysCommit: global.get(\"device1.sysCommitIndex\"),\n                    leaderDataCommit: global.get(\"device1.dataCommitIndex\"),\n                    sysEntries: sysEntries,\n                    dataEntries: dataEntries\n                }\n            };\n            j++;\n        }\n    }\n    return [newMsg];\n    \n}\n\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":390,"y":1020,"wires":[["6f9c0baf10f8bc91"]]},{"id":"a102604a.fe65c8","type":"function","z":"e8034ec0.182578","name":"isUpdateTerm","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(typeof msg.payload !== 'undefined'){\n    if(msg.payload.term > myTerm){\n        global.set(\"device1.currentTerm\", msg.payload.term);\n        global.set(\"device1.voteFor\", null);\n        global.set(\"device1.state\", \"follower\");\n    }\n    else{\n        return msg;\n    }\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":980,"y":1020,"wires":[["9fca9662.48c49","5c376bdf.4bc82c","cadd8a3.2140778","ff9f0847.173b48"]]},{"id":"9fca9662.48c49","type":"function","z":"e8034ec0.182578","name":"isSuccess","func":"var serverId = msg.payload.id;\nvar nextSysLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\");\nvar nextDataLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\");\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\n\nif(msg.payload.sysSuccess === false){\n\n    if(nextSysLogIndex - 1 > sysSnapshotIndex) {\n        nextSysLogIndex -= 1;\n    } else if (nextSysLogIndex <= sysSnapshotIndex) {\n        nextSysLogIndex = sysSnapshotIndex + 1;\n    }\n    global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\", nextSysLogIndex);\n}\nelse{\n\n    if(msg.payload.sysEntriesLen > 1) {// not heartbeat message \n        nextSysLogIndex = nextSysLogIndex + msg.payload.sysEntriesLen - 1;\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\", nextSysLogIndex);\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].matchSysLogIndex\", nextSysLogIndex-1);\n    }\n}\n\n\nif(msg.payload.dataSuccess === false){\n\n    if(nextDataLogIndex - 1 > dataSnapshotIndex) {\n        nextDataLogIndex -= 1;\n    } else if (nextDataLogIndex  <= dataSnapshotIndex) {\n        nextDataLogIndex = dataSnapshotIndex + 1;\n    }\n    global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\", nextDataLogIndex);\n}\nelse{\n\n    if(msg.payload.dataEntriesLen > 1) {\n        nextDataLogIndex = nextDataLogIndex + msg.payload.dataEntriesLen - 1;\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\", nextDataLogIndex);\n        global.set(\"device1.devices[\"+(serverId - 100000)+\"].matchDataLogIndex\", nextDataLogIndex-1);\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1220,"y":1040,"wires":[["1a3a2f43.16ff89"]]},{"id":"1a3a2f43.16ff89","type":"function","z":"e8034ec0.182578","name":"commitIndex++","func":"var devices = global.get(\"device1.devices\");\nvar nodesNum = global.get(\"device1.nodesNum\");\nvar majority = Math.round((nodesNum-1)/2);\nvar myId = global.get(\"device1.id\");\nvar myTerm = global.get(\"device1.currentTerm\");\nvar matchSysLogIndexArr = [];\nvar matchDataLogIndexArr = [];\nvar sysCommitIndex = global.get(\"device1.sysCommitIndex\");\nvar dataCommitIndex = global.get(\"device1.dataCommitIndex\");\nvar systemLog = global.get(\"device1.systemLog\");\nvar dataLog = global.get(\"device1.dataLog\");\nfor(let device of devices) {\n    if(device.id !== null && device.id != myId) {\n        matchSysLogIndexArr.push(device.matchSysLogIndex);\n        matchDataLogIndexArr.push(device.matchDataLogIndex);\n    }\n    \n}\n\nmatchSysLogIndexArr.sort((a, b) => a - b);\nmatchDataLogIndexArr.sort((a, b) => a - b);\n\nfor(let i=majority; i>=0; i--) {\n    if(matchSysLogIndexArr[i] > sysCommitIndex) {\n        for(let log of systemLog) {\n            if(log.index == matchSysLogIndexArr[i]) {\n                if(log.term == myTerm) {\n                    sysCommitIndex = matchSysLogIndexArr[i];\n                }\n                break;\n            }\n        }\n    }\n    if(matchDataLogIndexArr[i] > dataCommitIndex) {\n        for(let log of dataLog) {\n            if(log.index == matchDataLogIndexArr[i]) {\n                if(log.term == myTerm) {\n                    dataCommitIndex = matchDataLogIndexArr[i];\n                }\n                break;\n            }\n        }\n    }\n}\nglobal.set(\"device1.sysCommitIndex\", sysCommitIndex);\nglobal.set(\"device1.dataCommitIndex\", dataCommitIndex);\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1380,"y":1040,"wires":[[]]},{"id":"14b1e89c.463d47","type":"function","z":"e8034ec0.182578","name":"RPC","func":"msg.topic = \"RPC\";\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":490,"y":380,"wires":[["c8e8e64b.60ec28"]]},{"id":"5c376bdf.4bc82c","type":"function","z":"e8034ec0.182578","name":"change topic","func":"msg.topic = msg.payload.id;\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1230,"y":1100,"wires":[["5f0d35de.012b5c"]]},{"id":"96868548.e8294","type":"function","z":"e8034ec0.182578","name":"isDeviceOn","func":"if(msg.payload == \"timeout\") {\n     \n    global.set(\"device1.devices[\" + (msg.topic - 100000) + \"].online\", false);\n} else {\n    \n    global.set(\"device1.devices[\" + (msg.topic - 100000) + \"].online\", true); \n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1550,"y":1100,"wires":[["683575de.cc64fc","e44b25dd.175e5"]]},{"id":"683575de.cc64fc","type":"function","z":"e8034ec0.182578","name":"assignDVAssetRequest","func":"//virtualFunc\nvar virtualFuncs = global.get(\"device1.virtualFuncs\");\n//get online devices\nvar devices = global.get(\"device1.devices\");\nvar leaderId = global.get(\"device1.leaderId\");\nvar onlineDeviceIds = {};\nvar systemLog = global.get(\"device1.systemLog\");\nvar prevLogIndex = systemLog[systemLog.length-1].index;\nvar term = global.get(\"device1.currentTerm\");\n\n\n// snapshot here\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\n// hardcoded functions (number)\nvar currvirtualFuncs0 = global.get(\"device1.virtualFuncs[0].device\");\nvar currvirtualFuncs1 = global.get(\"device1.virtualFuncs[1].device\");\n\nvar sysLastApplied = global.get(\"device1.sysLastApplied\");\nvar sysSnapshotTH = global.get(\"device1.sysSnapshotTH\");\nif(sysLastApplied - sysSnapshotIndex > sysSnapshotTH) {\n    var logAfterSnapshot = [];\n    var newSysSnapshotTerm = -1;\n    for(let log of systemLog) {\n        if(log.index == sysLastApplied){\n            newSysSnapshotTerm = log.term;\n            let newFirstLog = {\n                index: sysLastApplied,\n                term: newSysSnapshotTerm,\n                command: null\n            };\n            logAfterSnapshot.push(newFirstLog);\n        } else if(log.index > sysLastApplied) {\n            logAfterSnapshot.push(log);\n        }\n    }\n    global.set(\"device1.sysSnapshot.index\",sysLastApplied);\n    global.set(\"device1.sysSnapshot.term\",newSysSnapshotTerm);\n    global.set(\"device1.sysSnapshot.virtualFuncs[0].device\",currvirtualFuncs0);\n    global.set(\"device1.sysSnapshot.virtualFuncs[1].device\",currvirtualFuncs1);\n    systemLog = logAfterSnapshot;\n    \n}\n\n// check for online devices\nfor(let device of devices) {\n    if(device.online === true) {\n        onlineDeviceIds[\"\"+device.id] = 0;\n    }\n}\n\n// identify current workload\n// for loops tauschen, leader +1 nur beim loopen durch devices\nfor(let deviceId in onlineDeviceIds) {\n    \n    if (deviceId == leaderId) {\n        onlineDeviceIds[\"\"+deviceId] += 1;\n    }\n    \n    for(let virtualFunc of virtualFuncs) {\n        if(deviceId == virtualFunc.device) {\n            onlineDeviceIds[\"\"+deviceId] += 1;\n        }\n    }  \n}\n\n// reassign functions\nvar j = 0;\nfor(let virtualFunc of virtualFuncs) {\n    let isWorking = false;\n    // own id and workload\n    let relativeFreeDeviceId = global.get(\"device1.id\");\n    let workload = onlineDeviceIds[\"\"+relativeFreeDeviceId];//\n    for(let deviceId in onlineDeviceIds) {\n        if(deviceId == virtualFunc.device) {\n            isWorking = true;\n        }\n    }\n    // if function is not assigned/working\n    if(!isWorking) {\n        for(let deviceId in onlineDeviceIds) {\n            // check if other devices have a smaller workload than self\n            if(onlineDeviceIds[deviceId] < workload) {\n                workload = onlineDeviceIds[deviceId];\n                relativeFreeDeviceId = parseInt(deviceId); // get min\n            }\n        }\n        onlineDeviceIds[\"\"+relativeFreeDeviceId] += 1;\n        \n        //node.warn(relativeFreeDeviceId);\n        \n        let command = \"d\" + (relativeFreeDeviceId-100000) + \"vf\" + j;\n        let entry = {\n            index: prevLogIndex + 1,\n            term: term,\n            command: command\n        }\n        systemLog.push(entry);\n        prevLogIndex += 1;\n    }\n    j++;\n}\n\nglobal.set(\"device1.systemLog\", systemLog);\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1770,"y":1140,"wires":[["d8f7d54a.783cf8"]]},{"id":"7a15a110.bac49","type":"function","z":"e8034ec0.182578","name":"state machine","func":"var sysCommitIndex = global.get(\"device1.sysCommitIndex\");\nvar sysLastApplied = global.get(\"device1.sysLastApplied\");\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\nif (sysCommitIndex > sysLastApplied) { // execute command //how about roll back\n    if(sysLastApplied < sysSnapshotIndex) { // execute snapshot\n        var sysSnapshotVirtualFuncs = global.get(\"device1.sysSnapshot.virtualFuncs\");\n        global.set(\"device1.virtualFuncs\", sysSnapshotVirtualFuncs);\n        global.set(\"device1.sysLastApplied\", sysSnapshotIndex);\n    } else {\n        var systemLog = global.get(\"device1.systemLog\");\n        var command = null;\n        \n        for(let log of systemLog) {\n            if(log.index == sysLastApplied+1) {\n                command = log.command;\n                //node.warn(\"command:\");\n                //node.warn(log.command);\n                break;\n            }\n        }\n        \n        if(command !== null) {\n            var pattern = \"(?:d)([0-9]*)(?:vf)([0-9]*)\";\n            var deviceId = parseInt(command.match(pattern)[1])+100000;\n            var vfId = parseInt(command.match(pattern)[2]);\n            global.set(\"device1.virtualFuncs[\"+vfId+\"].device\", deviceId);\n            sysLastApplied += 1;\n            global.set(\"device1.sysLastApplied\", sysLastApplied);\n            //node.warn(\"DeviceID: \" + deviceId);\n            //node.warn(\"vfId: \" + vfId);\n            //var test = command.match(pattern);\n        }\n    }\n\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":360,"y":1160,"wires":[["cd125a54.98e9"]]},{"id":"220404b7.2bf64c","type":"function","z":"e8034ec0.182578","name":"assignDVAsset","func":"msg = {\n    payload: {\n        id: global.get(\"device1.id\"),\n        virtualFunctions: global.get(\"device1.virtualFuncs\")\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":680,"y":1160,"wires":[["f7de9d89.d7bbb8","954c09e32251cddd"]]},{"id":"cd125a54.98e9","type":"function","z":"e8034ec0.182578","name":"isLeader","func":"if(global.get(\"device1.state\") == \"leader\"){ \n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":520,"y":1160,"wires":[["220404b7.2bf64c"]]},{"id":"4cebd161.848db8","type":"function","z":"e8034ec0.182578","name":"data processor","func":"\nvar dataCommitIndex = global.get(\"device1.dataCommitIndex\");\nvar dataLastApplied = global.get(\"device1.dataLastApplied\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\nif (dataCommitIndex > dataLastApplied) { // execute command //how about roll back\n    if(dataLastApplied < dataSnapshotIndex) {\n        // no need to set payload, since leader have send it to control device\n        // TODO: delete current database and duplicate leader's database\n        global.set(\"device1.dataLastApplied\", dataSnapshotIndex);\n        \n    }\n    else {\n        var dataLog = global.get(\"device1.dataLog\");\n        var command = null;\n        for(let log of dataLog) {\n            if(log.index == dataLastApplied + 1) {\n                command = log.command;\n                break;\n            }\n        }\n        if(command !== null) {\n            // hardcoded data command pattern\n            //var pattern = \"(?:s)([0-9]*)(?:m1)([0-9]*)(?:m2)([0-9]*)(?:ts)([0-9]*)\";\n            //var s = command.match(pattern)[1];\n            //var m1 = command.match(pattern)[2];\n            //var m2 = command.match(pattern)[3];\n            //var ts = command.match(pattern)[4];\n            //global.set(\"device1.timestamp\", ts);\n            // hardcoded sql statement to store results in DB\n            //msg.topic = \"INSERT IGNORE INTO states (states, measurement1, measurement2, time) VALUES (\" + s + \",\" + m1 + \", \" + m2 + \", \" + ts + \");\";\n            msg.payload = {\n                command\n            }\n            //node.warn(command);\n            //node.warn(command.split(',').map(Number));\n            \n            dataLastApplied += 1;\n            global.set(\"device1.dataLastApplied\", dataLastApplied);      \n            return msg;\n        }\n    }\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":360,"y":1320,"wires":[["e85be469.ba8498","3eb17029.4cd0d8"]]},{"id":"d8f7d54a.783cf8","type":"function","z":"e8034ec0.182578","name":"persistent storage","func":"msg.payload = {\n    currentTerm: global.get(\"device1.currentTerm\"),\n    voteFor: global.get(\"device1.voteFor\"),\n    systemLog: global.get(\"device1.systemLog\"),\n    dataLog: global.get(\"device1.dataLog\"),\n    sysSnapshot: global.get(\"device1.sysSnapshot\"),\n    dataSnapshot: global.get(\"device1.dataSnapshot\")\n};\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1990,"y":1140,"wires":[["7ffbb6e1.7a9dd8"]]},{"id":"7ffbb6e1.7a9dd8","type":"file","z":"e8034ec0.182578","name":"","filename":"/home/pi/Desktop/device1","appendNewline":false,"createDir":true,"overwriteFile":"true","encoding":"none","x":2210,"y":1140,"wires":[[]]},{"id":"ff9f0847.173b48","type":"function","z":"e8034ec0.182578","name":"SendSysSnapshot","func":"var serverId = msg.payload.id;\nvar nextSysLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextSysLogIndex\");\n\n//var sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\n// snapshot here\nvar sysSnapshotIndex = global.get(\"device1.sysSnapshot.index\");\n\nvar syscount = flow.get(\"syscount\") || 1;\n\nif (syscount < 5) {\n    node.warn(\"SendSysSnapshotNode:\");\n    node.warn(msg.payload.sysSuccess);\n    node.warn(nextSysLogIndex);\n    node.warn(sysSnapshotIndex);\n}\n\nsyscount++;\n\nflow.set(\"syscount\",syscount);\n\n\n//if(msg.payload.sysSuccess === false && nextSysLogIndex - 1 == sysSnapshotIndex) {\nif(nextSysLogIndex - 1 == sysSnapshotIndex) {\n    msg.payload = {\n        leaderId: global.get(\"device1.id\"),\n        sendId: serverId,\n        term: global.get(\"device1.currentTerm\"),\n        lastIncludedIndex: global.get(\"device1.sysSnapshot.index\"),\n        lastIncludedTerm: global.get(\"device1.sysSnapshot.term\"),\n        virtualFunctions: global.get(\"device1.sysSnapshot.virtualFuncs\")\n        \n    }\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1250,"y":980,"wires":[["1506bd50e6d17b03"]]},{"id":"cadd8a3.2140778","type":"function","z":"e8034ec0.182578","name":"SendDataSnapshotCheck","func":"var serverId = msg.payload.id;\nvar nextDataLogIndex = global.get(\"device1.devices[\"+(serverId - 100000)+\"].nextDataLogIndex\");\nvar dataSnapshotIndex = global.get(\"device1.dataSnapshot.index\");\nif(msg.payload.dataSuccess === false && nextDataLogIndex - 1 == dataSnapshotIndex) {\n    return msg;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1270,"y":900,"wires":[["e6876b38.23ad6"]]},{"id":"90cc26d4.0b84b","type":"function","z":"e8034ec0.182578","name":"UpdateSysSnapshot","func":"var myTerm = global.get(\"device1.currentTerm\");\n\nif(msg.payload.term < myTerm) {\n    msg.payload = {\n        term: myTerm\n    }\n} else {\n    var systemLog = global.get(\"device1.systemLog\");\n    var lastLogIndex = systemLog[systemLog.length-1].index;\n    var newSystemLog = [];\n    var firstLog = {\n        index:msg.payload.lastIncludedIndex,\n        term: msg.payload.lastIncludedTerm,\n        command: null\n    }; \n    newSystemLog.push(firstLog);\n    global.set(\"device1.sysSnapshot.index\", msg.payload.lastIncludedIndex);\n    global.set(\"device1.sysSnapshot.term\", msg.payload.lastIncludedTerm);\n    global.set(\"device1.sysSnapshot.virtualFuncs\", msg.payload.virtualFunctions);\n    if(lastLogIndex > msg.payload.lastIncludedIndex) {\n        for(let log of systemLog) {\n            if(log.index > msg.payload.lastIncludedIndex) {\n                newSystemLog.push(log);\n            }\n        }\n    }\n    \n    global.set(\"device1.systemLog\", newSystemLog);\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":720,"y":760,"wires":[["5703d621e5907de8"]]},{"id":"619d09e2.17e938","type":"function","z":"e8034ec0.182578","name":"UpdateDataSnapshot","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(msg.payload.term < myTerm) {\n    msg.payload = {\n        term: myTerm\n    }\n} else {\n    var dataLog = global.get(\"device1.dataLog\");\n    var lastLogIndex = dataLog[dataLog.length-1].index;\n    var newDataLog = [];\n    var firstLog = {\n        index:msg.payload.lastIncludedIndex,\n        term: msg.payload.lastIncludedTerm,\n        command: null\n    }; \n    newDataLog.push(firstLog);\n    global.set(\"device1.dataSnapshot.index\", msg.payload.lastIncludedIndex);\n    global.set(\"device1.dataSnapshot.term\", msg.payload.lastIncludedTerm);\n    global.set(\"device1.dataSnapshot.timestamp\", msg.payload.ts);\n    if(lastLogIndex > msg.payload.lastIncludedIndex) {\n        for(let log of dataLog) {\n            if(log.index > msg.payload.lastIncludedIndex) {\n                newDataLog.push(log);\n            }\n        }\n    }\n    \n    global.set(\"device1.dataLog\", newDataLog);\n    \n    msg.payload = {\n        term: myTerm\n    }\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":720,"y":800,"wires":[["5703d621e5907de8"]]},{"id":"658fc2f4.1026bc","type":"function","z":"e8034ec0.182578","name":"UpdateTerm","func":"var myTerm = global.get(\"device1.currentTerm\");\nif(msg.payload.term > myTerm) {\n    global.set(\"device1.currentTerm\", myTerm);\n    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M.NAME\"\n\nmsg.payload = sqlWrite;\nmsg.connectName = \"connect\";\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":980,"y":1280,"wires":[["85cba6bd.c0f18"]]},{"id":"85cba6bd.c0f18","type":"postgres","z":"e8034ec0.182578","postgresdb":"3d5ce28770ed0d20","name":"vpp","output":false,"outputs":0,"x":1230,"y":1320,"wires":[]},{"id":"10ffb8a7.ba3487","type":"function","z":"e8034ec0.182578","name":"load from persistent storage","func":"global.set(\"device1\",undefined); // clear history\n\nif(msg.payload.length===1){ // if exists\n    global.set(\"device1.currentTerm\", msg.payload[0].currentTerm);\n    global.set(\"device1.voteFor\", msg.payload[0].voteFor);\n    global.set(\"device1.systemLog\",msg.payload[0].systemLog);\n    global.set(\"device1.dataLog\",msg.payload[0].dataLog);\n    global.set(\"device1.sysSnapshot\", msg.payload[0].sysSnapshot);\n    global.set(\"device1.dataSnapshot\", msg.payload[0].dataSnapshot);\n    \n} else {\n    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}\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":390,"y":1440,"wires":[[]]},{"id":"3603e552.3536ea","type":"split","z":"e8034ec0.182578","name":"split","splt":"10","spltType":"len","arraySplt":"10","arraySpltType":"len","stream":false,"addname":"","x":850,"y":1580,"wires":[["a0fa6158.213458"]]},{"id":"a0fa6158.213458","type":"switch","z":"e8034ec0.182578","name":"","property":"payload","propertyType":"msg","rules":[{"t":"index","v":"0","vt":"num","v2":"0","v2t":"num"},{"t":"index","v":"1","vt":"num","v2":"1","v2t":"num"},{"t":"index","v":"2","vt":"num","v2":"2","v2t":"num"}],"checkall":"true","repair":false,"outputs":3,"x":1010,"y":1580,"wires":[["8491bef5.a35f98"],["7198942e.f5b2c4"],["c40085a686a1f474"]]},{"id":"b07e41ef.2a8b58","type":"postgres","z":"e8034ec0.182578","postgresdb":"3d5ce28770ed0d20","name":"vpp","output":false,"outputs":0,"x":1450,"y":1580,"wires":[]},{"id":"6f37cb10.82e28c","type":"function","z":"e8034ec0.182578","name":"","func":"var dataLog 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'U01', 'U02', 'U03', 'U04', 'U05', 'U06', 'U07', 'U08', 'U09', 'U10' ];\nvar failed = msg.payload\n\nvar sqlWrite = \"UPDATE UNIT_STATES AS M SET FAILED = C.FAILED FROM ( VALUES ( '\" + names[0]  + \"', \" + failed[0] + \" )\";\nvar i = 1;\nfor (i; i < names.length; i++) {\n            sqlWrite = sqlWrite + \", ( '\" + names[i] + \"', \" + failed[i] + \" )\";\n        }\n\nsqlWrite = sqlWrite + \" ) AS C(NAME, FAILED) WHERE C.NAME = M.NAME\"\n\nmsg.payload = sqlWrite;\nmsg.connectName = \"connect\";\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":1190,"y":1580,"wires":[["b07e41ef.2a8b58"]]},{"id":"8491bef5.a35f98","type":"function","z":"e8034ec0.182578","name":"Update - unit activation","func":"var names = [ 'U01', 'U02', 'U03', 'U04', 'U05', 'U06', 'U07', 'U08', 'U09', 'U10' ];\nvar status = msg.payload\n\nvar sqlWrite = \"UPDATE UNIT_STATES AS M SET ACTIVE = C.ACTIVE FROM ( VALUES ( '\" + names[0]  + \"', \" + status[0] + \" )\";\nvar i = 1;\nfor (i; i < names.length; i++) {\n            sqlWrite = sqlWrite + \", ( '\" + names[i] + \"', \" + status[i] + \" )\";\n        }\n\nsqlWrite = sqlWrite + \" ) AS C(NAME, ACTIVE) WHERE C.NAME = M.NAME\"\n\nmsg.payload = sqlWrite;\nmsg.connectName = \"connect\";\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1200,"y":1540,"wires":[["b07e41ef.2a8b58"]]},{"id":"b2cde435ac09a8c8","type":"comment","z":"e8034ec0.182578","name":"Read persistent storage","info":"","x":320,"y":220,"wires":[]},{"id":"bf2b6e298f3a8e0e","type":"comment","z":"e8034ec0.182578","name":"Init Term / Logs / Snapshot","info":"","x":830,"y":220,"wires":[]},{"id":"c385cce04ce02b57","type":"comment","z":"e8034ec0.182578","name":"Init parameters","info":"","x":1060,"y":180,"wires":[]},{"id":"f5e15eec8e459022","type":"comment","z":"e8034ec0.182578","name":"Loop","info":"","x":830,"y":340,"wires":[]},{"id":"1cfb607e7b3c5378","type":"comment","z":"e8034ec0.182578","name":"Request Votes from other 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global.get(\"device1.hostname_prefix\");\nvar suffix = global.get(\"device1.hostname_suffix\");\n\nmsg.payload = \"[1,2,1,2,1,2,1,2]\";\nmsg.host = prefix + \"1\" + suffix;\nmsg.port = \"9088\";\n\nmsg.payload = msg.payload.substring(1,msg.payload.length-1);\nmsg.payload = msg.payload.split(',').map(Number);\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":540,"y":1100,"wires":[["bf4a7b9642d97bf6"]]},{"id":"bf4a7b9642d97bf6","type":"tcp request","z":"f825e8a0.9d51f","name":"","server":"","port":"","out":"time","ret":"buffer","splitc":"0","newline":"","tls":"","x":670,"y":1100,"wires":[[]]},{"id":"cfbac421b054011d","type":"tcp in","z":"f825e8a0.9d51f","name":"","server":"server","host":"","port":"9088","datamode":"stream","datatype":"utf8","newline":"","topic":"","base64":false,"tls":"","x":860,"y":1100,"wires":[["d0d7df3f14425ed4"]]},{"id":"d0d7df3f14425ed4","type":"function","z":"f825e8a0.9d51f","name":"","func":"msg.payload = msg.payload.split(',').map(Number);\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":1000,"y":1100,"wires":[["defda5e14d764d30"]]},{"id":"defda5e14d764d30","type":"debug","z":"f825e8a0.9d51f","name":"","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":1150,"y":1100,"wires":[]},{"id":"9461393e.0e724","type":"inject","z":"6d95b6d3.106588","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"1","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":170,"y":100,"wires":[["856a3489.e1c158"]]},{"id":"856a3489.e1c158","type":"function","z":"6d95b6d3.106588","name":"generate measurements","func":"var timestamp = msg.payload;\nvar measurements = [];\nvar power = 0;\n\nvar i = 0;\nfor (i; i < 10; i++) {\n    if ((flow.get(\"failure\") || false) && i == 1) {\n        power = 0\n    }\n    else {\n        power=Math.ceil(Math.random()*20)+90;\n    }\n    measurements.push(power);\n}\n\nmeasurements.push(timestamp);\n\nmsg.payload = measurements\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":100,"wires":[["5687ca1b485d3cab"]]},{"id":"cf757ad1.575d","type":"inject","z":"6d95b6d3.106588","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":220,"wires":[["10720989.b356e6"]]},{"id":"77710a4c.3cb504","type":"inject","z":"6d95b6d3.106588","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":160,"y":300,"wires":[["507fff78.6af578"]]},{"id":"10720989.b356e6","type":"function","z":"6d95b6d3.106588","name":"","func":"flow.set(\"failure\", 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= prefix + (i+1) + suffix;\n    newMsg[i].port = \"9057\";\n    newMsg[i].sendId = 100001+i;\n}\n\nreturn [newMsg];","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":570,"y":100,"wires":[["fea4e60940d46592"]]},{"id":"fea4e60940d46592","type":"tcp request","z":"6d95b6d3.106588","name":"","server":"","port":"","out":"time","ret":"string","splitc":"0","newline":"","tls":"","x":710,"y":100,"wires":[[]]},{"id":"9963bb2c3e7fd4f0","type":"comment","z":"6d95b6d3.106588","name":"Create Data","info":"","x":170,"y":60,"wires":[]}]
\ No newline at end of file
--- a/pi-setup.sh
+++ b/pi-setup.sh
@@ -73,5 +73,5 @@ echo -e "\nInstallation succesful."
 # Postgresql
-apt-get upgrade
+sudo apt-get upgrade
-apt-get install postgresql-client
+sudo apt-get install postgresql-client