org.apache.mina.util.NamePreservingRunnable Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. All rights reserved.
*
* 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.
*/
package org.apache.mina.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A {@link Runnable} wrapper that preserves the name of the thread after the runnable is
* complete (for {@link Runnable}s that change the name of the Thread they use.)
*
* @author Apache MINA Project
*/
public class NamePreservingRunnable implements Runnable {
private final static Logger LOGGER = LoggerFactory.getLogger(NamePreservingRunnable.class);
/** The runnable name */
private final String newName;
/** The runnable task */
private final Runnable runnable;
/**
* Creates a new instance of NamePreservingRunnable.
*
* @param runnable The underlying runnable
* @param newName The runnable's name
*/
public NamePreservingRunnable(Runnable runnable, String newName) {
this.runnable = runnable;
this.newName = newName;
}
/**
* Run the runnable after having renamed the current thread's name
* to the new name. When the runnable has completed, set back the
* current thread name back to its origin.
*/
public void run() {
Thread currentThread = Thread.currentThread();
String oldName = currentThread.getName();
if (newName != null) {
setName(currentThread, newName);
}
try {
runnable.run();
} finally {
setName(currentThread, oldName);
}
}
/**
* Wraps {@link Thread#setName(String)} to catch a possible {@link Exception}s such as
* {@link SecurityException} in sandbox environments, such as applets
*/
private void setName(Thread thread, String name) {
try {
thread.setName(name);
} catch (SecurityException se) {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn("Failed to set the thread name.", se);
}
}
}
}