1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.mina.util;
20
21 import org.slf4j.Logger;
22 import org.slf4j.LoggerFactory;
23
24 /**
25 * A {@link Runnable} wrapper that preserves the name of the thread after the runnable is
26 * complete (for {@link Runnable}s that change the name of the Thread they use.)
27 *
28 * @author The Apache MINA Project (dev@mina.apache.org)
29 * @version $Rev: 446581 $, $Date: 2006-09-15 11:36:12Z $,
30 */
31 public class NamePreservingRunnable implements Runnable {
32 private final Logger logger = LoggerFactory.getLogger(NamePreservingRunnable.class);
33
34 private final String newName;
35 private final Runnable runnable;
36
37 public NamePreservingRunnable(Runnable runnable, String newName) {
38 this.runnable = runnable;
39 this.newName = newName;
40 }
41
42 public void run() {
43 Thread currentThread = Thread.currentThread();
44 String oldName = currentThread.getName();
45
46 if (newName != null) {
47 setName(currentThread, newName);
48 }
49
50 try {
51 runnable.run();
52 } finally {
53 setName(currentThread, oldName);
54 }
55 }
56
57 /**
58 * Wraps {@link Thread#setName(String)} to catch a possible {@link Exception}s such as
59 * {@link SecurityException} in sandbox environments, such as applets
60 */
61 private void setName(Thread thread, String name) {
62 try {
63 thread.setName(name);
64 } catch (Exception e) {
65 // Probably SecurityException.
66 if (logger.isWarnEnabled()) {
67 logger.warn("Failed to set the thread name.", e);
68 }
69 }
70 }
71 }