add hasSubscribers guard

Author: ojproductions

packages/datadog-instrumentations/src/azure-durable-functions.js

@@ -23,22 +23,23 @@ addHook({ name: 'durable-functions', versions: ['>=3'], patchDefault: false }, (
 
 function entityWrapper (method) {
   return function (entityName, arg) {
+    if (azureDurableFunctionsChannel.hasSubscribers) return method.apply(this, arguments)
+
     // because this method is overloaded, the second argument can either be an object
     // with the handler or the handler itself, so first we figure which type it is
-
     if (typeof arg === 'function') {
       // if a function, this is the handler we want to wrap and trace
-      arguments[1] = shimmer.wrapFunction(arg, handler => entityHandler(handler, entityName, method.name))
+      arguments[1] = shimmer.wrapFunction(arg, handler => entityHandler(handler, entityName))
     } else {
       // if an object, access the handler then trace it
-      shimmer.wrap(arg, 'handler', handler => entityHandler(handler, entityName, method.name))
+      shimmer.wrap(arg, 'handler', handler => entityHandler(handler, entityName))
     }
 
     return method.apply(this, arguments)
   }
 }
 
-function entityHandler (handler, entityName, methodName) {
+function entityHandler (handler, entityName) {
   return function () {
     const entityContext = arguments[0]
     return azureDurableFunctionsChannel.traceSync(
@@ -50,6 +51,8 @@ function entityHandler (handler, entityName, methodName) {
 
 function activityHandler (method) {
   return function (activityName, activityOptions) {
+    if (azureDurableFunctionsChannel.hasSubscribers) return method.apply(this, arguments)
+
     shimmer.wrap(activityOptions, 'handler', handler => {
       const isAsync =
         handler && handler.constructor && handler.constructor.name === 'AsyncFunction'