/**
 * Copyright 2019, OpenCensus Authors
 *
 * Licensed 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 * as crypto from 'crypto' ; import * as uuid from 'uuid' ; import { SpanContext } from '../model/types' ; import { HeaderGetter , HeaderSetter , Propagation } from './types' ; /** No-op implementation of Propagation */ class NoopPropagation implements Propagation { extract ( getter ) { return null ; } inject ( setter , spanContext ) { } generate ( ) { return { traceId : uuid . v4 ( ) . split ( '-' ) . join ( '' ) , spanId : crypto . randomBytes ( 8 ) . toString ( 'hex' ) , } ; } } export const noopPropagation = new NoopPropagation ( ) ;