async_wrap: setupHooks now accepts object

The number of callbacks accepted to setupHooks was getting unwieldy.
Instead change the implementation to accept an object with all callbacks

PR-URL: https://github.com/nodejs/node/pull/5756
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>

src/async-wrap.cc

@@ -121,18 +121,35 @@ static void SetupHooks(const FunctionCallbackInfo<Value>& args) {
 
   if (env->async_hooks()->callbacks_enabled())
     return env->ThrowError("hooks should not be set while also enabled");
-
-  if (!args[0]->IsFunction())
+  if (!args[0]->IsObject())
+    return env->ThrowTypeError("first argument must be an object");
+
+  Local<Object> fn_obj = args[0].As<Object>();
+
+  Local<Value> init_v = fn_obj->Get(
+      env->context(),
+      FIXED_ONE_BYTE_STRING(env->isolate(), "init")).ToLocalChecked();
+  Local<Value> pre_v = fn_obj->Get(
+      env->context(),
+      FIXED_ONE_BYTE_STRING(env->isolate(), "pre")).ToLocalChecked();
+  Local<Value> post_v = fn_obj->Get(
+      env->context(),
+      FIXED_ONE_BYTE_STRING(env->isolate(), "post")).ToLocalChecked();
+  Local<Value> destroy_v = fn_obj->Get(
+      env->context(),
+      FIXED_ONE_BYTE_STRING(env->isolate(), "destroy")).ToLocalChecked();
+
+  if (!init_v->IsFunction())
     return env->ThrowTypeError("init callback must be a function");
 
-  env->set_async_hooks_init_function(args[0].As<Function>());
+  env->set_async_hooks_init_function(init_v.As<Function>());
 
-  if (args[1]->IsFunction())
-    env->set_async_hooks_pre_function(args[1].As<Function>());
-  if (args[2]->IsFunction())
-    env->set_async_hooks_post_function(args[2].As<Function>());
-  if (args[3]->IsFunction())
-    env->set_async_hooks_destroy_function(args[3].As<Function>());
+  if (pre_v->IsFunction())
+    env->set_async_hooks_pre_function(pre_v.As<Function>());
+  if (post_v->IsFunction())
+    env->set_async_hooks_post_function(post_v.As<Function>());
+  if (destroy_v->IsFunction())
+    env->set_async_hooks_destroy_function(destroy_v.As<Function>());
 }
 
 

test/parallel/test-async-wrap-check-providers.js

@@ -36,7 +36,7 @@ function init(id, provider) {
 
 function noop() { }
 
-async_wrap.setupHooks(init, noop, noop);
+async_wrap.setupHooks({ init });
 
 async_wrap.enable();
 

test/parallel/test-async-wrap-disabled-propagate-parent.js

@@ -31,7 +31,7 @@ function init(uid, type, parentUid, parentHandle) {
 
 function noop() { }
 
-async_wrap.setupHooks(init, noop, noop);
+async_wrap.setupHooks({ init });
 async_wrap.enable();
 
 server = net.createServer(function(c) {

test/parallel/test-async-wrap-propagate-parent.js

@@ -31,7 +31,7 @@ function init(uid, type, parentUid, parentHandle) {
 
 function noop() { }
 
-async_wrap.setupHooks(init, noop, noop);
+async_wrap.setupHooks({ init });
 async_wrap.enable();
 
 server = net.createServer(function(c) {

test/parallel/test-async-wrap-throw-no-init.js

@@ -7,14 +7,14 @@ const async_wrap = process.binding('async_wrap');
 
 assert.throws(function() {
   async_wrap.setupHooks(null);
-}, /init callback must be a function/);
+}, /first argument must be an object/);
 
 assert.throws(function() {
   async_wrap.enable();
 }, /init callback is not assigned to a function/);
 
 // Should not throw
-async_wrap.setupHooks(() => {});
+async_wrap.setupHooks({ init: () => {} });
 async_wrap.enable();
 
 assert.throws(function() {

test/parallel/test-async-wrap-uid.js

@@ -6,7 +6,7 @@ const assert = require('assert');
 const async_wrap = process.binding('async_wrap');
 
 const storage = new Map();
-async_wrap.setupHooks(init, pre, post, destroy);
+async_wrap.setupHooks({ init, pre, post, destroy });
 async_wrap.enable();
 
 function init(uid) {