New: Add the option to supply a default value

(coscine/issues#741)

src/Logging/CoscineLogger.cs

@@ -350,13 +350,13 @@ namespace Coscine.Logging
 
         private static void UpdateActiveLogs()
         {
-            activeLoglevels[(int)LogType.Debug] = !GetStringFromConsul(LogLevelKeyDebug).Equals("0");
-            activeLoglevels[(int)LogType.Low] = !GetStringFromConsul(LogLevelKeyLow).Equals("0");
-            activeLoglevels[(int)LogType.Medium] = !GetStringFromConsul(LogLevelKeyMedium).Equals("0");
-            activeLoglevels[(int)LogType.High] = !GetStringFromConsul(LogLevelKeyHigh).Equals("0");
-            activeLoglevels[(int)LogType.Critical] = !GetStringFromConsul(LogLevelKeyCritical).Equals("0");
-            activeLoglevels[(int)LogType.Analytics] = !GetStringFromConsul(LogLevelKeyAnalytics).Equals("0");
-            activeLoglevels[(int)LogType.Reporting] = !GetStringFromConsul(LogLevelKeyReporting).Equals("0");
+            activeLoglevels[(int)LogType.Debug] = !GetStringFromConsul(LogLevelKeyDebug, "0").Equals("0");
+            activeLoglevels[(int)LogType.Low] = !GetStringFromConsul(LogLevelKeyLow, "0").Equals("0");
+            activeLoglevels[(int)LogType.Medium] = !GetStringFromConsul(LogLevelKeyMedium, "0").Equals("0");
+            activeLoglevels[(int)LogType.High] = !GetStringFromConsul(LogLevelKeyHigh, "1").Equals("0");
+            activeLoglevels[(int)LogType.Critical] = !GetStringFromConsul(LogLevelKeyCritical, "1").Equals("0");
+            activeLoglevels[(int)LogType.Analytics] = !GetStringFromConsul(LogLevelKeyAnalytics, "0").Equals("0");
+            activeLoglevels[(int)LogType.Reporting] = !GetStringFromConsul(LogLevelKeyReporting, "0").Equals("0");
 
             var config = LogManager.Configuration;
             config.FindRuleByName("blockAllInformation").Final = !activeLoglevels[(int)LogType.Analytics] && !activeLoglevels[(int)LogType.Reporting];
@@ -392,15 +392,28 @@ namespace Coscine.Logging
 
                 getPair.Wait();
 
-                var returnValue = getPair.Result.Response.Value;
-
-                if (returnValue != null)
+                if (getPair.Result.Response?.Value != null)
+                {
+                    var value = getPair.Result.Response.Value;
+                    return Encoding.UTF8.GetString(value, 0, value.Length);
+                }
+                else
                 {
-                    return Encoding.UTF8.GetString(returnValue, 0, returnValue.Length);
+                    // TODO: Add logging that key has not been found
+                    return null;
                 }
-                return null;
+            }
+        }
 
+        private static string GetStringFromConsul(string key, string defaultValue)
+        {
+            var value = GetStringFromConsul(key);
+            if(value == null)
+            {
+                // TODO: Add logging that default value has been used
+                return defaultValue;
             }
+            return value;
         }
     }
 }