async_hooks: remove deprecated emitBefore and emitAfter

AsyncResource.emitBefore and AsyncResource.emitAfter have been
deprecated in #18632. This PR removes
it all.
This commit also updates some embedder tests to use internal APIs.
The conditions are still possible for Node.js core developers but not
for end users.

PR-URL: #26530
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Benedikt Meurer <benedikt.meurer@gmail.com>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/async_hooks.md

@@ -659,41 +659,6 @@ of the async resource. This will establish the context, trigger the AsyncHooks
 before callbacks, call the function, trigger the AsyncHooks after callbacks, and
 then restore the original execution context.
 
-#### asyncResource.emitBefore()
-<!-- YAML
-deprecated: v9.6.0
--->
-> Stability: 0 - Deprecated: Use [`asyncResource.runInAsyncScope()`][] instead.
-
-Call all `before` callbacks to notify that a new asynchronous execution context
-is being entered. If nested calls to `emitBefore()` are made, the stack of
-`asyncId`s will be tracked and properly unwound.
-
-`before` and `after` calls must be unwound in the same order that they
-are called. Otherwise, an unrecoverable exception will occur and the process
-will abort. For this reason, the `emitBefore` and `emitAfter` APIs are
-considered deprecated. Please use `runInAsyncScope`, as it provides a much safer
-alternative.
-
-#### asyncResource.emitAfter()
-<!-- YAML
-deprecated: v9.6.0
--->
-> Stability: 0 - Deprecated: Use [`asyncResource.runInAsyncScope()`][] instead.
-
-Call all `after` callbacks. If nested calls to `emitBefore()` were made, then
-make sure the stack is unwound properly. Otherwise an error will be thrown.
-
-If the user's callback throws an exception, `emitAfter()` will automatically be
-called for all `asyncId`s on the stack if the error is handled by a domain or
-`'uncaughtException'` handler.
-
-`before` and `after` calls must be unwound in the same order that they
-are called. Otherwise, an unrecoverable exception will occur and the process
-will abort. For this reason, the `emitBefore` and `emitAfter` APIs are
-considered deprecated. Please use `runInAsyncScope`, as it provides a much safer
-alternative.
-
 #### asyncResource.emitDestroy()
 
 * Returns: {AsyncResource} A reference to `asyncResource`.
@@ -713,7 +678,6 @@ never be called.
 `AsyncResource` constructor.
 
 [`after` callback]: #async_hooks_after_asyncid
-[`asyncResource.runInAsyncScope()`]: #async_hooks_asyncresource_runinasyncscope_fn_thisarg_args
 [`before` callback]: #async_hooks_before_asyncid
 [`destroy` callback]: #async_hooks_destroy_asyncid
 [`init` callback]: #async_hooks_init_asyncid_type_triggerasyncid_resource

doc/api/deprecations.md

@@ -1905,6 +1905,9 @@ should start using the `async_context` variant of `MakeCallback` or
 ### DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url:
+    description: End-of-Life
   - version:
     - v8.12.0
     - v9.6.0
@@ -1913,7 +1916,7 @@ changes:
     description: Runtime deprecation.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
 The embedded API provided by AsyncHooks exposes `.emitBefore()` and
 `.emitAfter()` methods which are very easy to use incorrectly which can lead

lib/async_hooks.js

@@ -127,17 +127,6 @@ function createHook(fns) {
 
 const destroyedSymbol = Symbol('destroyed');
 
-let emitBeforeAfterWarning = true;
-function showEmitBeforeAfterWarning() {
-  if (emitBeforeAfterWarning) {
-    process.emitWarning(
-      'asyncResource.emitBefore and emitAfter are deprecated. Please use ' +
-      'asyncResource.runInAsyncScope instead',
-      'DeprecationWarning', 'DEP0098');
-    emitBeforeAfterWarning = false;
-  }
-}
-
 class AsyncResource {
   constructor(type, opts = {}) {
     validateString(type, 'type');
@@ -169,18 +158,6 @@ class AsyncResource {
     }
   }
 
-  emitBefore() {
-    showEmitBeforeAfterWarning();
-    emitBefore(this[async_id_symbol], this[trigger_async_id_symbol]);
-    return this;
-  }
-
-  emitAfter() {
-    showEmitBeforeAfterWarning();
-    emitAfter(this[async_id_symbol]);
-    return this;
-  }
-
   runInAsyncScope(fn, thisArg, ...args) {
     emitBefore(this[async_id_symbol], this[trigger_async_id_symbol]);
     let ret;

test/async-hooks/test-callback-error.js

@@ -19,7 +19,7 @@ switch (arg) {
       onbefore: common.mustCall(() => { throw new Error(arg); })
     }).enable();
     const resource = new async_hooks.AsyncResource(`${arg}_type`);
-    resource.emitBefore();
+    resource.runInAsyncScope(() => {});
     return;
 
   case 'test_callback_abort':

test/async-hooks/test-embedder.api.async-resource.js

@@ -47,16 +47,16 @@ assert.strictEqual(typeof alcaEvent.asyncId(), 'number');
 assert.notStrictEqual(alcaEvent.asyncId(), alcaTriggerId);
 assert.strictEqual(alcaEvent.triggerAsyncId(), alcaTriggerId);
 
-alcaEvent.emitBefore();
-checkInvocations(alcazares, { init: 1, before: 1 },
-                 'alcazares emitted before');
-alcaEvent.emitAfter();
+alcaEvent.runInAsyncScope(() => {
+  checkInvocations(alcazares, { init: 1, before: 1 },
+                   'alcazares emitted before');
+});
 checkInvocations(alcazares, { init: 1, before: 1, after: 1 },
                  'alcazares emitted after');
-alcaEvent.emitBefore();
-checkInvocations(alcazares, { init: 1, before: 2, after: 1 },
-                 'alcazares emitted before again');
-alcaEvent.emitAfter();
+alcaEvent.runInAsyncScope(() => {
+  checkInvocations(alcazares, { init: 1, before: 2, after: 1 },
+                   'alcazares emitted before again');
+});
 checkInvocations(alcazares, { init: 1, before: 2, after: 2 },
                  'alcazares emitted after again');
 alcaEvent.emitDestroy();
@@ -75,11 +75,11 @@ function tick1() {
   assert.strictEqual(typeof poblado.uid, 'number');
   assert.strictEqual(poblado.triggerAsyncId, pobTriggerId);
   checkInvocations(poblado, { init: 1 }, 'poblado constructed');
-  pobEvent.emitBefore();
-  checkInvocations(poblado, { init: 1, before: 1 },
-                   'poblado emitted before');
+  pobEvent.runInAsyncScope(() => {
+    checkInvocations(poblado, { init: 1, before: 1 },
+                     'poblado emitted before');
+  });
 
-  pobEvent.emitAfter();
   checkInvocations(poblado, { init: 1, before: 1, after: 1 },
                    'poblado emitted after');
 

test/async-hooks/test-embedder.api.async-resource.after-on-destroyed.js → test/async-hooks/test-emit-after-on-destroyed.js

@@ -1,13 +1,18 @@
+// Flags: --expose-internals
 'use strict';
 
 const common = require('../common');
 const assert = require('assert');
-const async_hooks = require('async_hooks');
-const { AsyncResource } = async_hooks;
+const internal_async_hooks = require('internal/async_hooks');
 const { spawn } = require('child_process');
 const corruptedMsg = /async hook stack has become corrupted/;
 const heartbeatMsg = /heartbeat: still alive/;
 
+const {
+  newAsyncId, getDefaultTriggerAsyncId,
+  emitInit, emitBefore, emitAfter, emitDestroy
+} = internal_async_hooks;
+
 const initHooks = require('./init-hooks');
 
 if (process.argv[2] === 'child') {
@@ -17,20 +22,29 @@ if (process.argv[2] === 'child') {
   // Once 'destroy' has been emitted, we can no longer emit 'after'
 
   // Emitting 'before', 'after' and then 'destroy'
-  const event1 = new AsyncResource('event1', async_hooks.executionAsyncId());
-  event1.emitBefore();
-  event1.emitAfter();
-  event1.emitDestroy();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event1', triggerId, {});
+    emitBefore(asyncId, triggerId);
+    emitAfter(asyncId);
+    emitDestroy(asyncId);
+  }
 
   // Emitting 'after' after 'destroy'
-  const event2 = new AsyncResource('event2', async_hooks.executionAsyncId());
-  event2.emitDestroy();
-
-  console.log('heartbeat: still alive');
-  event2.emitAfter();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event2', triggerId, {});
+    emitDestroy(asyncId);
 
+    console.log('heartbeat: still alive');
+    emitAfter(asyncId);
+  }
 } else {
-  const args = process.argv.slice(1).concat('child');
+  const args = ['--expose-internals']
+    .concat(process.argv.slice(1))
+    .concat('child');
   let errData = Buffer.from('');
   let outData = Buffer.from('');
 

test/async-hooks/test-embedder.api.async-resource.before-on-destroyed.js → test/async-hooks/test-emit-before-on-destroyed.js

@@ -1,13 +1,18 @@
+// Flags: --expose-internals
 'use strict';
 
 const common = require('../common');
 const assert = require('assert');
-const async_hooks = require('async_hooks');
-const { AsyncResource } = async_hooks;
+const internal_async_hooks = require('internal/async_hooks');
 const { spawn } = require('child_process');
 const corruptedMsg = /async hook stack has become corrupted/;
 const heartbeatMsg = /heartbeat: still alive/;
 
+const {
+  newAsyncId, getDefaultTriggerAsyncId,
+  emitInit, emitBefore, emitAfter, emitDestroy
+} = internal_async_hooks;
+
 const initHooks = require('./init-hooks');
 
 if (process.argv[2] === 'child') {
@@ -17,20 +22,29 @@ if (process.argv[2] === 'child') {
   // Once 'destroy' has been emitted, we can no longer emit 'before'
 
   // Emitting 'before', 'after' and then 'destroy'
-  const event1 = new AsyncResource('event1', async_hooks.executionAsyncId());
-  event1.emitBefore();
-  event1.emitAfter();
-  event1.emitDestroy();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event1', triggerId, {});
+    emitBefore(asyncId, triggerId);
+    emitAfter(asyncId);
+    emitDestroy(asyncId);
+  }
 
   // Emitting 'before' after 'destroy'
-  const event2 = new AsyncResource('event2', async_hooks.executionAsyncId());
-  event2.emitDestroy();
-
-  console.log('heartbeat: still alive');
-  event2.emitBefore();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event2', triggerId, {});
+    emitDestroy(asyncId);
 
+    console.log('heartbeat: still alive');
+    emitBefore(asyncId, triggerId);
+  }
 } else {
-  const args = process.argv.slice(1).concat('child');
+  const args = ['--expose-internals']
+    .concat(process.argv.slice(1))
+    .concat('child');
   let errData = Buffer.from('');
   let outData = Buffer.from('');
 

test/async-hooks/test-embedder.api.async-resource.improper-order.js → test/async-hooks/test-improper-order.js

@@ -1,13 +1,18 @@
+// Flags: --expose-internals
 'use strict';
 
 const common = require('../common');
 const assert = require('assert');
-const async_hooks = require('async_hooks');
-const { AsyncResource } = async_hooks;
+const internal_async_hooks = require('internal/async_hooks');
 const { spawn } = require('child_process');
 const corruptedMsg = /async hook stack has become corrupted/;
 const heartbeatMsg = /heartbeat: still alive/;
 
+const {
+  newAsyncId, getDefaultTriggerAsyncId,
+  emitInit, emitBefore, emitAfter
+} = internal_async_hooks;
+
 const initHooks = require('./init-hooks');
 
 if (process.argv[2] === 'child') {
@@ -17,18 +22,28 @@ if (process.argv[2] === 'child') {
   // Async hooks enforce proper order of 'before' and 'after' invocations
 
   // Proper ordering
-  const event1 = new AsyncResource('event1', async_hooks.executionAsyncId());
-  event1.emitBefore();
-  event1.emitAfter();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event1', triggerId, {});
+    emitBefore(asyncId, triggerId);
+    emitAfter(asyncId);
+  }
 
   // Improper ordering
   // Emitting 'after' without 'before' which is illegal
-  const event2 = new AsyncResource('event2', async_hooks.executionAsyncId());
-
-  console.log('heartbeat: still alive');
-  event2.emitAfter();
+  {
+    const asyncId = newAsyncId();
+    const triggerId = getDefaultTriggerAsyncId();
+    emitInit(asyncId, 'event2', triggerId, {});
+
+    console.log('heartbeat: still alive');
+    emitAfter(asyncId);
+  }
 } else {
-  const args = process.argv.slice(1).concat('child');
+  const args = ['--expose-internals']
+    .concat(process.argv.slice(1))
+    .concat('child');
   let errData = Buffer.from('');
   let outData = Buffer.from('');
 

test/async-hooks/test-embedder.api.async-resource.improper-unwind.js → test/async-hooks/test-improper-unwind.js

@@ -1,13 +1,18 @@
+// Flags: --expose-internals
 'use strict';
 
 const common = require('../common');
 const assert = require('assert');
-const async_hooks = require('async_hooks');
-const { AsyncResource } = async_hooks;
+const internal_async_hooks = require('internal/async_hooks');
 const { spawn } = require('child_process');
 const corruptedMsg = /async hook stack has become corrupted/;
 const heartbeatMsg = /heartbeat: still alive/;
 
+const {
+  newAsyncId, getDefaultTriggerAsyncId,
+  emitInit, emitBefore, emitAfter
+} = internal_async_hooks;
+
 const initHooks = require('./init-hooks');
 
 if (process.argv[2] === 'child') {
@@ -21,23 +26,28 @@ if (process.argv[2] === 'child') {
   // The first test of the two below follows that rule,
   // the second one doesn't.
 
-  const event1 = new AsyncResource('event1', async_hooks.executionAsyncId());
-  const event2 = new AsyncResource('event2', async_hooks.executionAsyncId());
+  const eventOneId = newAsyncId();
+  const eventTwoId = newAsyncId();
+  const triggerId = getDefaultTriggerAsyncId();
+  emitInit(eventOneId, 'event1', triggerId, {});
+  emitInit(eventTwoId, 'event2', triggerId, {});
 
   // Proper unwind
-  event1.emitBefore();
-  event2.emitBefore();
-  event2.emitAfter();
-  event1.emitAfter();
+  emitBefore(eventOneId, triggerId);
+  emitBefore(eventTwoId, triggerId);
+  emitAfter(eventTwoId);
+  emitAfter(eventOneId);
 
   // Improper unwind
-  event1.emitBefore();
-  event2.emitBefore();
+  emitBefore(eventOneId, triggerId);
+  emitBefore(eventTwoId, triggerId);
 
   console.log('heartbeat: still alive');
-  event1.emitAfter();
+  emitAfter(eventOneId);
 } else {
-  const args = process.argv.slice(1).concat('child');
+  const args = ['--expose-internals']
+    .concat(process.argv.slice(1))
+    .concat('child');
   let errData = Buffer.from('');
   let outData = Buffer.from('');