fix: use gals lib (#268)

https://github.com/node-modules/gals

Author: fengmk2

lib/egg.js

@@ -1,12 +1,12 @@
 const assert = require('assert');
-const { AsyncLocalStorage } = require('async_hooks');
 const fs = require('fs');
 const KoaApplication = require('koa');
 const EggConsoleLogger = require('egg-logger').EggConsoleLogger;
 const debug = require('debug')('egg-core');
 const is = require('is-type-of');
 const co = require('co');
 const Router = require('@eggjs/router').EggRouter;
+const { getAsyncLocalStorage } = require('gals');
 const BaseContextClass = require('./utils/base_context_class');
 const utils = require('./utils');
 const Timing = require('./utils/timing');
@@ -16,7 +16,6 @@ const DEPRECATE = Symbol('EggCore#deprecate');
 const ROUTER = Symbol('EggCore#router');
 const EGG_LOADER = Symbol.for('egg#loader');
 const CLOSE_PROMISE = Symbol('EggCore#closePromise');
-const EGG_CTX_STORAGE = Symbol.for('egg#ctxStorage');
 
 class EggCore extends KoaApplication {
 
@@ -40,10 +39,7 @@ class EggCore extends KoaApplication {
     // disable koa als and use egg logic
     super({ asyncLocalStorage: false });
     // can access the AsyncLocalStorage instance in global
-    if (!global[EGG_CTX_STORAGE]) {
-      global[EGG_CTX_STORAGE] = new AsyncLocalStorage();
-    }
-    this.ctxStorage = global[EGG_CTX_STORAGE];
+    this.ctxStorage = getAsyncLocalStorage();
 
     this.timing = new Timing();
 

package.json

@@ -65,6 +65,7 @@
     "egg-logger": "^3.1.0",
     "egg-path-matching": "^1.0.1",
     "extend2": "^1.0.0",
+    "gals": "^1.0.1",
     "get-ready": "^2.0.1",
     "globby": "^11.0.2",
     "is-type-of": "^1.2.1",

test/asyncLocalStorage.test.js

@@ -2,6 +2,7 @@ const assert = require('assert');
 const path = require('path');
 const { AsyncLocalStorage } = require('async_hooks');
 const request = require('supertest');
+const { getAsyncLocalStorage, kGALS } = require('gals');
 const EggApplication = require('./fixtures/egg').Application;
 
 describe('test/asyncLocalStorage.test.js', () => {
@@ -26,8 +27,10 @@ describe('test/asyncLocalStorage.test.js', () => {
   });
 
   it('should access als on global', async () => {
-    assert(global[Symbol.for('egg#ctxStorage')]);
-    assert(global[Symbol.for('egg#ctxStorage')] instanceof AsyncLocalStorage);
-    assert.equal(app.ctxStorage, global[Symbol.for('egg#ctxStorage')]);
+    assert(global[Symbol.for('gals#asyncLocalStorage')]);
+    assert(global[kGALS]);
+    assert(global[Symbol.for('gals#asyncLocalStorage')] instanceof AsyncLocalStorage);
+    assert.equal(app.ctxStorage, global[Symbol.for('gals#asyncLocalStorage')]);
+    assert.equal(app.ctxStorage, getAsyncLocalStorage());
   });
 });