src/GraphDeployer/GraphDeployer.csproj

@@ -7,7 +7,7 @@
 		<AssemblyName>Coscine.GraphDeployer</AssemblyName>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
-		<Version>1.2.5</Version>
+		<Version>1.2.6</Version>
 	</PropertyGroup>
 	
 	<PropertyGroup>
@@ -27,6 +27,7 @@
 		<PackageReference Include="LibGit2Sharp" Version="0.26.2" />
 		<PackageReference Include="NLog" Version="5.1.0" />
 		<PackageReference Include="NLog.Extensions.Logging" Version="5.2.0" />
+		<PackageReference Include="Polly.Extensions.Http" Version="3.0.0" />
 	</ItemGroup>
 
 	<ItemGroup>

src/GraphDeployer/Helpers.cs

+using Polly;
+
+namespace Coscine.GraphDeployer;
+
+public static class Helpers
+{
+    /// <summary>
+    /// Retry Virtuoso Requests since they sometimes just fail
+    /// </summary>
+    /// <typeparam name="W"></typeparam>
+    /// <param name="function"></param>
+    /// <returns></returns>
+    public static void WrapRequest(Action action)
+    {
+        Policy
+            .Handle<Exception>()
+            .WaitAndRetry(5, retryNumber => TimeSpan.FromMilliseconds(200))
+            .Execute(() => action.Invoke());
+    }
+
+    /// <summary>
+    /// Retry Virtuoso Requests since they sometimes just fail
+    /// </summary>
+    /// <typeparam name="W"></typeparam>
+    /// <param name="function"></param>
+    /// <returns></returns>
+    public static W WrapRequest<W>(Func<W> function)
+    {
+        return Policy
+            .Handle<Exception>()
+            .WaitAndRetry(5, retryNumber => TimeSpan.FromMilliseconds(200))
+            .ExecuteAndCapture(() => function.Invoke()).Result;
+    }
+
+}

src/GraphDeployer/Program.cs

@@ -90,16 +90,41 @@ public class Program
                 // Graph Insertion
                 var queries = new List<string>();
                 var turtleFiles = Directory.GetFiles(WorkingFolder, "*.ttl", SearchOption.AllDirectories);
-                foreach (var file in turtleFiles)
+
+                var graphAccumulation = new Dictionary<Uri, (Graph, List<string>)>();
+                Array.ForEach(turtleFiles, (file) =>
                 {
-                    var fileInfo = new FileInfo(file);
                     var graph = new Graph();
                     graph.LoadFromFile(file);
-                    var graphName = graph.BaseUri.ToString();
+                    if (graphAccumulation.ContainsKey(graph.BaseUri))
+                    {
+                        graphAccumulation[graph.BaseUri].Item1.Merge(graph);
+                        graphAccumulation[graph.BaseUri].Item2.Add(file);
+                    }
+                    else
+                    {
+                        graphAccumulation.Add(graph.BaseUri, (graph, new List<string>() { file }));
+                    }
+                });
 
-                    if (_rdfStoreConnector.HasGraph(graphName))
+                foreach (var kv in graphAccumulation)
                 {
-                        _rdfStoreConnector.ClearGraph(graphName);
+                    var graph = kv.Value.Item1;
+                    var graphName = kv.Key.ToString();
+
+                    var currentGraph = Helpers.WrapRequest(() => _rdfStoreConnector.GetGraph(graphName));
+
+                    var graphWasChanged = graph.Triples.Count != currentGraph.Triples.Count
+                        || graph.Triples.Any((triple) => !currentGraph.Triples.Any((currentTriple) =>
+                            (triple.Subject.Equals(currentTriple.Subject) || (triple.Subject.NodeType == NodeType.Blank && currentTriple.Subject.NodeType == NodeType.Blank)
+                            && triple.Predicate.Equals(currentTriple.Predicate)
+                            && triple.Object.Equals(currentTriple.Object) || (triple.Object.NodeType == NodeType.Blank && currentTriple.Object.NodeType == NodeType.Blank))));
+
+                    if (graphWasChanged)
+                    {
+                        if (!currentGraph.IsEmpty)
+                        {
+                            Helpers.WrapRequest(() => _rdfStoreConnector.ClearGraph(graphName));
                             _logger.LogInformation("Cleared Graph {graphName}", graphName);
                         }
                         else
@@ -107,8 +132,18 @@ public class Program
                             _logger.LogInformation("No Graph {graphName}", graphName);
                         }
 
+                        foreach (var file in kv.Value.Item2)
+                        {
+                            var fileInfo = new FileInfo(file);
                             queries.Add($"ld_dir('{fileInfo.DirectoryName[2..].Replace("\\", "/")}', '{fileInfo.Name}', '{graphName}');");
                         }
+                    }
+                    else
+                    {
+                        _logger.LogInformation("Skipping {graphName}", graphName);
+
+                    }
+                }
                 queries.Add($"rdf_loader_run ();");
                 queries.Add($"DELETE from DB.DBA.load_list where 1=1;");