Merge pull request #112386 from ggailey777/brett

Adding v2 custom Javascript telemetry sample to use traceContext

Author: PRMerger20

articles/azure-functions/functions-monitoring.md

@@ -529,7 +529,9 @@ Don't set `telemetryClient.Context.Operation.Id`. This global setting causes inc
 
 ## Log custom telemetry in JavaScript functions
 
-Here is a sample code snippet that sends custom telemetry with the [Application Insights Node.js SDK](https://github.com/microsoft/applicationinsights-node.js):
+Here are sample code snippets that sends custom telemetry with the [Application Insights Node.js SDK](https://github.com/microsoft/applicationinsights-node.js):
+
+### Version 2.x and later
 
 ```javascript
 const appInsights = require("applicationinsights");
@@ -539,12 +541,39 @@ const client = appInsights.defaultClient;
 module.exports = function (context, req) {
     context.log('JavaScript HTTP trigger function processed a request.');
 
-    client.trackEvent({name: "my custom event", tagOverrides:{"ai.operation.id": context.invocationId}, properties: {customProperty2: "custom property value"}});
-    client.trackException({exception: new Error("handled exceptions can be logged with this method"), tagOverrides:{"ai.operation.id": context.invocationId}});
-    client.trackMetric({name: "custom metric", value: 3, tagOverrides:{"ai.operation.id": context.invocationId}});
-    client.trackTrace({message: "trace message", tagOverrides:{"ai.operation.id": context.invocationId}});
-    client.trackDependency({target:"http://dbname", name:"select customers proc", data:"SELECT * FROM Customers", duration:231, resultCode:0, success: true, dependencyTypeName: "ZSQL", tagOverrides:{"ai.operation.id": context.invocationId}});
-    client.trackRequest({name:"GET /customers", url:"http://myserver/customers", duration:309, resultCode:200, success:true, tagOverrides:{"ai.operation.id": context.invocationId}});
+    // Use this with 'tagOverrides' to correlate custom telemetry to the parent function invocation.
+    var operationIdOverride = {"ai.operation.id":context.traceContext.traceparent};
+
+    client.trackEvent({name: "my custom event", tagOverrides:operationIdOverride, properties: {customProperty2: "custom property value"}});
+    client.trackException({exception: new Error("handled exceptions can be logged with this method"), tagOverrides:operationIdOverride);
+    client.trackMetric({name: "custom metric", value: 3, tagOverrides:operationIdOverride});
+    client.trackTrace({message: "trace message", tagOverrides:operationIdOverride});
+    client.trackDependency({target:"http://dbname", name:"select customers proc", data:"SELECT * FROM Customers", duration:231, resultCode:0, success: true, dependencyTypeName: "ZSQL", tagOverrides:operationIdOverride});
+    client.trackRequest({name:"GET /customers", url:"http://myserver/customers", duration:309, resultCode:200, success:true, tagOverrides:operationIdOverride});
+
+    context.done();
+};
+```
+
+### Version 1.x
+
+```javascript
+const appInsights = require("applicationinsights");
+appInsights.setup();
+const client = appInsights.defaultClient;
+
+module.exports = function (context, req) {
+    context.log('JavaScript HTTP trigger function processed a request.');
+
+    // Use this with 'tagOverrides' to correlate custom telemetry to the parent function invocation.
+    var operationIdOverride = {"ai.operation.id":context.operationId};
+
+    client.trackEvent({name: "my custom event", tagOverrides:operationIdOverride, properties: {customProperty2: "custom property value"}});
+    client.trackException({exception: new Error("handled exceptions can be logged with this method"), tagOverrides:operationIdOverride);
+    client.trackMetric({name: "custom metric", value: 3, tagOverrides:operationIdOverride});
+    client.trackTrace({message: "trace message", tagOverrides:operationIdOverride});
+    client.trackDependency({target:"http://dbname", name:"select customers proc", data:"SELECT * FROM Customers", duration:231, resultCode:0, success: true, dependencyTypeName: "ZSQL", tagOverrides:operationIdOverride});
+    client.trackRequest({name:"GET /customers", url:"http://myserver/customers", duration:309, resultCode:200, success:true, tagOverrides:operationIdOverride});
 
     context.done();
 };