| /*! |
| * |
| * 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 { AsyncLocalStorage } from 'async_hooks'; |
| |
| type AsyncState = {context: Context, spans: Span[]}; |
| |
| const store = new AsyncLocalStorage<AsyncState>(); |
| |
| class ContextManager { |
| get asyncState(): AsyncState { |
| let asyncState = store.getStore(); |
| |
| if (asyncState === undefined) { |
| asyncState = {context: new SpanContext(), spans: []}; |
| 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 = {context: new SpanContext(), spans: []}; |
| } else { |
| asyncState = {context: asyncState.context, spans: [...asyncState.spans]}; |
| } |
| |
| store.enterWith(asyncState); |
| |
| return asyncState.spans; |
| } |
| |
| clear(): void { |
| store.enterWith(undefined as unknown as AsyncState); |
| } |
| |
| restore(context: Context, spans: Span[]): void { |
| store.enterWith({context, spans: spans || []}); |
| } |
| |
| withSpan(span: Span, callback: (...args: any[]) => any, ...args: any[]): any { |
| if(!span.startTime) |
| span.start(); |
| |
| try { |
| return callback(span, ...args); |
| } catch (e) { |
| span.error(e); |
| throw e; |
| } finally { |
| span.stop(); |
| } |
| } |
| |
| withSpanNoStop(span: Span, callback: (...args: any[]) => any, ...args: any[]): any { |
| if(!span.startTime) |
| span.start(); |
| |
| try { |
| return callback(span, ...args); |
| } catch (e) { |
| span.error(e); |
| span.stop(); |
| throw e; |
| } |
| } |
| } |
| |
| export default new ContextManager(); |