| /* |
| * 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. |
| */ |
| |
| package org.apache.servicecomb.tests.tracing; |
| |
| import org.apache.log4j.MDC; |
| import org.springframework.context.annotation.Bean; |
| import org.springframework.context.annotation.Configuration; |
| import org.springframework.context.annotation.Primary; |
| |
| import brave.internal.codec.HexCodec; |
| import brave.propagation.CurrentTraceContext; |
| import brave.propagation.TraceContext; |
| |
| @Configuration |
| class TraceContextConfig { |
| |
| @Bean |
| @Primary |
| CurrentTraceContext traceContext() { |
| return ParentAwareMDCCurrentTraceContext.create(); |
| } |
| |
| private static class ParentAwareMDCCurrentTraceContext extends CurrentTraceContext { |
| static ParentAwareMDCCurrentTraceContext create() { |
| return new ParentAwareMDCCurrentTraceContext(Default.inheritable()); |
| } |
| |
| private final CurrentTraceContext delegate; |
| |
| ParentAwareMDCCurrentTraceContext(CurrentTraceContext delegate) { |
| if (delegate == null) { |
| throw new NullPointerException("delegate == null"); |
| } |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public TraceContext get() { |
| return delegate.get(); |
| } |
| |
| @Override |
| public Scope newScope(TraceContext currentSpan) { |
| final Object previousTraceId = MDC.get("traceId"); |
| final Object previousSpanId = MDC.get("spanId"); |
| final Object previousParentId = MDC.get("parentId"); |
| |
| if (currentSpan != null) { |
| MDC.put("traceId", currentSpan.traceIdString()); |
| MDC.put("spanId", HexCodec.toLowerHex(currentSpan.spanId())); |
| if (currentSpan.parentId() != null) { |
| MDC.put("parentId", HexCodec.toLowerHex(currentSpan.parentId())); |
| } |
| } else { |
| MDC.remove("traceId"); |
| MDC.remove("spanId"); |
| MDC.remove("parentId"); |
| } |
| |
| Scope scope = delegate.newScope(currentSpan); |
| class MDCCurrentTraceContextScope implements Scope { |
| @Override |
| public void close() { |
| scope.close(); |
| if (previousTraceId != null) { |
| MDC.put("traceId", previousTraceId); |
| } else { |
| MDC.remove("traceId"); |
| } |
| |
| if (previousSpanId != null) { |
| MDC.put("spanId", previousSpanId); |
| } else { |
| MDC.remove("spanId"); |
| } |
| |
| if (previousParentId != null) { |
| MDC.put("parentId", previousParentId); |
| } else { |
| MDC.remove("parentId"); |
| } |
| } |
| } |
| return new MDCCurrentTraceContextScope(); |
| } |
| } |
| } |