| /* |
| * 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.cloudera.htrace.wrappers; |
| |
| import org.cloudera.htrace.Span; |
| import org.cloudera.htrace.Trace; |
| import org.cloudera.htrace.TraceScope; |
| |
| /** |
| * Wrap a Runnable with a Span that survives a change in threads. |
| * |
| */ |
| public class TraceRunnable implements Runnable { |
| |
| private final Span parent; |
| private final Runnable runnable; |
| private final String description; |
| |
| public TraceRunnable(Runnable runnable) { |
| this(Trace.currentSpan(), runnable); |
| } |
| |
| public TraceRunnable(Span parent, Runnable runnable) { |
| this(parent, runnable, null); |
| } |
| |
| public TraceRunnable(Span parent, Runnable runnable, String description) { |
| this.parent = parent; |
| this.runnable = runnable; |
| this.description = description; |
| } |
| |
| @Override |
| public void run() { |
| if (parent != null) { |
| TraceScope chunk = Trace.startSpan(getDescription(), parent); |
| |
| try { |
| runnable.run(); |
| } finally { |
| chunk.close(); |
| } |
| } else { |
| runnable.run(); |
| } |
| } |
| |
| private String getDescription() { |
| return this.description == null ? Thread.currentThread().getName(): description; |
| } |
| } |