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feat(async): fix #740, use async hooks to wrap nodejs async api
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| /** | ||
| * @license | ||
| * Copyright Google Inc. All Rights Reserved. | ||
| * | ||
| * Use of this source code is governed by an MIT-style license that can be | ||
| * found in the LICENSE file at https://angular.io/license | ||
| */ | ||
|
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| Zone.__load_patch('node_async_check', (global: any, Zone: ZoneType, api: _ZonePrivate) => { | ||
| try { | ||
| require('async_hooks'); | ||
| (process as any)._rawDebug('load async_hooks'); | ||
| // nodejs 8.x with async_hooks support. | ||
| // disable original Zone patch | ||
| global['__Zone_disable_ZoneAwarePromise'] = true; | ||
| global['__Zone_disable_node_timers'] = true; | ||
| global['__Zone_disable_nextTick'] = true; | ||
| global['__Zone_disable_handleUnhandledPromiseRejection'] = true; | ||
| global['__Zone_disable_crypto'] = true; | ||
| global['__Zone_disable_fs'] = true; | ||
| } catch (err) { | ||
| global['__Zone_disable_node_async_hooks'] = true; | ||
| } | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /** | ||
| * @license | ||
| * Copyright Google Inc. All Rights Reserved. | ||
| * | ||
| * Use of this source code is governed by an MIT-style license that can be | ||
| * found in the LICENSE file at https://angular.io/license | ||
| */ | ||
|
|
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| /** | ||
| * patch nodejs async operations (timer, promise, net...) with | ||
| * nodejs async_hooks | ||
| */ | ||
| Zone.__load_patch('node_async_hooks', (global: any, Zone: ZoneType, api: _ZonePrivate) => { | ||
| let async_hooks; | ||
| const BEFORE_RUN_TASK_STATUS = 'BEFORE_RUN_TASK_STATUS'; | ||
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| async_hooks = require('async_hooks'); | ||
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| const idTaskMap: {[key: number]: Task} = (Zone as any)[Zone.__symbol__('nodeTasks')] = {}; | ||
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| const noop = function() {}; | ||
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| function init(id: number, provider: string, parentId: number, parentHandle: any) { | ||
| // @JiaLiPassion, check which tasks are microTask or macroTask | ||
| //(process as any)._rawDebug('init hook', id , provider); | ||
| if (provider === 'TIMERWRAP') { | ||
| return; | ||
| } | ||
| // create microTask if 'PROMISE' | ||
| if (provider === 'PROMISE') { | ||
| const task = idTaskMap[id] = Zone.current.scheduleMicroTask(provider, noop, null, noop); | ||
| //(process as any)._rawDebug('after init', id, 'status', task.state); | ||
| return; | ||
| } | ||
| // create macroTask in other cases | ||
| if (provider === 'Timeout' || provider === 'Immediate' || provider === 'FSREQWRAP') { | ||
| idTaskMap[id] = Zone.current.scheduleMacroTask(provider, noop, null, noop, noop); | ||
| } | ||
| } | ||
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| function before(id: number) { | ||
| //(process as any)._rawDebug('before hook', id); | ||
| // call Zone.beforeRunTask | ||
| const task: Task = idTaskMap[id]; | ||
| if (!task) { | ||
| return; | ||
| } | ||
| (task as any)[Zone.__symbol__(BEFORE_RUN_TASK_STATUS)] = api.beforeRunTask(task.zone, task); | ||
| } | ||
|
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| function after(id: number) { | ||
| //(process as any)._rawDebug('after hook', id); | ||
| const task: Task = idTaskMap[id]; | ||
| if (!task) { | ||
| return; | ||
| } | ||
| const beforeRunTask: BeforeRunTaskStatus = (task as any)[Zone.__symbol__(BEFORE_RUN_TASK_STATUS)]; | ||
| if (beforeRunTask) { | ||
| return; | ||
| } | ||
| (task as any)[Zone.__symbol__(BEFORE_RUN_TASK_STATUS)] = null; | ||
| api.afterRunTask(task.zone, beforeRunTask, task); | ||
| } | ||
|
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| function destroy(id: number) { | ||
| // try to cancel the task if is not canceled | ||
| const task: Task = idTaskMap[id]; | ||
| if (task && task.state === 'scheduled') { | ||
| task.zone.cancelTask(task); | ||
| } | ||
| idTaskMap[id] = null; | ||
| } | ||
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| process.on('uncaughtException', (err: any) => { | ||
| const task = Zone.currentTask; | ||
| if (task) { | ||
| const beforeRunTask: BeforeRunTaskStatus = (task as any)[Zone.__symbol__(BEFORE_RUN_TASK_STATUS)]; | ||
| if (beforeRunTask) { | ||
| if ((task.zone as any)._zoneDelegate.handleError(Zone.current, err)) { | ||
| throw err; | ||
| } | ||
| } | ||
| } | ||
| }); | ||
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| global[Zone.__symbol__('setTimeout')] = global.setTimeout; | ||
| global[Zone.__symbol__('setInterval')] = global.setInterval; | ||
| global[Zone.__symbol__('setImmediate')] = global.setImmediate; | ||
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| async_hooks.createHook({ init, before, after, destroy }).enable(); | ||
| }); |
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