| /*! |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| import Context from '../../trace/context/Context'; |
| import Span from '../../trace/span/Span'; |
| import SpanContext from '../../trace/context/SpanContext'; |
| |
| import async_hooks from 'async_hooks'; |
| |
| type AsyncState = { context: Context, spans: Span[], invalid: boolean }; |
| |
| let store: { |
| getStore(): AsyncState | undefined; |
| enterWith(s: AsyncState): void; |
| }; |
| |
| if (async_hooks.AsyncLocalStorage) { |
| store = new async_hooks.AsyncLocalStorage(); |
| } else { // Node 10 doesn't have AsyncLocalStore, so recreate it |
| const executionAsyncId = async_hooks.executionAsyncId; |
| const asyncLocalStore: { [index: string]: any } = {}; |
| |
| store = { |
| getStore(): AsyncState | undefined { |
| return asyncLocalStore[executionAsyncId()] as unknown as AsyncState; |
| }, |
| |
| enterWith(s: AsyncState): void { |
| asyncLocalStore[executionAsyncId()] = s; |
| }, |
| }; |
| |
| async_hooks.createHook({ |
| init(asyncId: number, type: string, triggerId: number) { |
| asyncLocalStore[asyncId] = asyncLocalStore[triggerId]; |
| }, |
| destroy(asyncId: number) { |
| delete asyncLocalStore[asyncId]; |
| }, |
| }).enable(); |
| } |
| |
| class ContextManager { |
| get asyncState(): AsyncState { |
| let asyncState = store.getStore(); |
| // since `AsyncLocalStorage.getStore` may get previous state, see issue https://github.com/nodejs/node/issues/35286#issuecomment-697207158, so recreate when asyncState is invalid |
| if (asyncState === undefined || asyncState.invalid) { |
| asyncState = { context: new SpanContext(), spans: [], invalid: false }; |
| store.enterWith(asyncState); |
| } |
| |
| return asyncState; |
| } |
| |
| get current(): Context { |
| return this.asyncState.context; |
| } |
| |
| get spans(): Span[] { |
| return this.asyncState.spans; |
| } |
| |
| spansDup(): Span[] { |
| let asyncState = store.getStore(); |
| |
| if (asyncState === undefined || asyncState.invalid) { |
| asyncState = { context: new SpanContext(), spans: [], invalid: false }; |
| } else { |
| asyncState = { context: asyncState.context, spans: [...asyncState.spans], invalid: asyncState.invalid }; |
| } |
| |
| store.enterWith(asyncState); |
| |
| return asyncState.spans; |
| } |
| |
| clear(): void { |
| this.asyncState.invalid = true; |
| store.enterWith(undefined as unknown as AsyncState); |
| } |
| |
| restore(context: Context, spans: Span[]): void { |
| store.enterWith({ context, spans: spans || [], invalid: this.asyncState.invalid }); |
| } |
| |
| withSpan(span: Span, callback: (...args: any[]) => any, ...args: any[]): any { |
| if (!span.startTime) |
| span.start(); |
| try { |
| return callback(...args); |
| } catch (e) { |
| span.error(e); |
| throw e; |
| } finally { |
| span.stop(); |
| } |
| } |
| |
| async withSpanAwait(span: Span, callback: (...args: any[]) => any, ...args: any[]): Promise<any> { |
| if (!span.startTime) |
| span.start(); |
| try { |
| return await callback(...args); |
| } catch (e) { |
| span.error(e); |
| throw e; |
| } finally { |
| span.stop(); |
| } |
| } |
| } |
| |
| export default new ContextManager(); |