/*
* Copyright 2009 the original author or 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.
*/
package org.gradle.process.internal.shutdown;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class ShutdownHookActionRegister {
private static final ShutdownHookActionRegister INSTANCE = new ShutdownHookActionRegister();
private final List<Runnable> shutdownHookActions = new CopyOnWriteArrayList<Runnable>();
private ShutdownHookActionRegister() {
Runtime.getRuntime().addShutdownHook(new Thread(new GradleShutdownHook(), "gradle-shutdown-hook"));
}
public static void addAction(Runnable shutdownHookAction) {
INSTANCE.shutdownHookActions.add(shutdownHookAction);
}
public static void removeAction(Runnable shutdownHookAction) {
INSTANCE.shutdownHookActions.remove(shutdownHookAction);
}
private class GradleShutdownHook implements Runnable {
public void run() {
for (final Runnable shutdownHookAction : shutdownHookActions) {
try {
shutdownHookAction.run();
} catch (Throwable t) {
System.err.println("failed to execute a shutdown action.");
t.printStackTrace(System.err);
}
}
}
}
}