| /*! |
| * |
| * 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 config from '../../config/AgentConfig'; |
| import Context from '../../trace/context/Context'; |
| import Span from '../../trace/span/Span'; |
| import SpanContext from '../../trace/context/SpanContext'; |
| import DummyContext from '../../trace/context/DummyContext'; |
| |
| import async_hooks from 'async_hooks'; |
| |
| type AsyncState = { spans: Span[] }; |
| |
| 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 { |
| isCold = true; |
| |
| cosntructor() { |
| setTimeout(() => this.isCold = false, 1000).unref(); |
| } |
| |
| checkCold(): boolean { |
| const isCold = this.isCold; |
| this.isCold = false; |
| |
| return isCold; |
| } |
| |
| get asyncState(): AsyncState { |
| let asyncState = store.getStore(); |
| |
| if (!asyncState) { |
| asyncState = { spans: [] }; |
| store.enterWith(asyncState); |
| } |
| |
| return asyncState; |
| } |
| |
| get currentSpan(): Span { |
| const spans = store.getStore()?.spans; |
| |
| return spans?.[spans.length - 1] as Span; |
| }; |
| |
| get hasContext(): boolean | undefined { |
| return Boolean(store.getStore()?.spans.length); |
| } |
| |
| get current(): Context { |
| const asyncState = this.asyncState; |
| |
| if (asyncState.spans.length) |
| return asyncState.spans[asyncState.spans.length - 1].context; |
| |
| if (SpanContext.nActiveSegments < config.maxBufferSize) |
| return new SpanContext(); |
| |
| return new DummyContext(); |
| } |
| |
| get spans(): Span[] { |
| return this.asyncState.spans; |
| } |
| |
| spansDup(): Span[] { |
| let asyncState = store.getStore(); |
| |
| if (!asyncState) { |
| asyncState = { spans: [] }; |
| } else { |
| asyncState = { spans: [...asyncState.spans] }; |
| } |
| |
| store.enterWith(asyncState); |
| |
| return asyncState.spans; |
| } |
| |
| clear(span: Span): void { |
| const spans = this.spansDup(); // this needed to make sure async tasks created before this call will still have this span at the top of their span list |
| const idx = spans.indexOf(span); |
| |
| if (idx !== -1) |
| spans.splice(idx, 1); |
| } |
| |
| restore(span: Span): void { |
| const spans = this.spansDup(); |
| |
| if (spans.indexOf(span) === -1) |
| spans.push(span); |
| } |
| |
| 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(); |