message format

NwNsgProject/BlobTriggerIngestAndTransmit.cs

@@ -32,6 +32,13 @@ namespace nsgFunc
                 throw new System.ArgumentNullException("blobContainerName", "Please provide setting.");
             }
 
+            string outputBinding = Util.GetEnvironmentVariable("outputBinding");
+            if (outputBinding.Length == 0)
+            {
+                log.LogError("Value for outputBinding is required. Permitted values are: 'logstash', 'arcsight', 'splunk', 'eventhub'.");
+                return 0;
+            }
+
             var blobDetails = new BlobDetails(subId, resourceGroup, nsgName, blobYear, blobMonth, blobDay, blobHour, blobMinute, mac);
 
             // get checkpoint
@@ -80,7 +87,7 @@ namespace nsgFunc
             try
             {
                 int bytesSent = await Util.SendMessagesDownstreamAsync(nsgMessagesString, log);
-                log.LogInformation($"Sending {nsgMessagesString.Length} bytes (denormalized to {bytesSent} bytes) downstream.");
+                log.LogInformation($"Sending {nsgMessagesString.Length} bytes (denormalized to {bytesSent} bytes) downstream via output binding {outputBinding}.");
             }
             catch (Exception ex)
             {