100 lines
2.2 KiB
Java
100 lines
2.2 KiB
Java
/*
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This file is part of Subsonic.
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Subsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Subsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2009 (C) Sindre Mehus
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*/
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package org.moire.ultrasonic.util;
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import timber.log.Timber;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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/**
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* @author Sindre Mehus
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* @version $Id$
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*/
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public abstract class CancellableTask
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{
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private final AtomicBoolean running = new AtomicBoolean(false);
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private final AtomicBoolean cancelled = new AtomicBoolean(false);
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private final AtomicReference<Thread> thread = new AtomicReference<Thread>();
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private final AtomicReference<OnCancelListener> cancelListener = new AtomicReference<OnCancelListener>();
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public void cancel()
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{
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Timber.i("Cancelling %s", CancellableTask.this);
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cancelled.set(true);
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OnCancelListener listener = cancelListener.get();
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if (listener != null)
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{
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try
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{
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listener.onCancel();
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}
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catch (Throwable x)
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{
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Timber.w(x, "Error when invoking OnCancelListener.");
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}
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}
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}
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public boolean isCancelled()
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{
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return cancelled.get();
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}
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public void setOnCancelListener(OnCancelListener listener)
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{
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cancelListener.set(listener);
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}
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public boolean isRunning()
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{
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return running.get();
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}
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public abstract void execute();
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public void start()
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{
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thread.set(new Thread()
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{
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@Override
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public void run()
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{
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running.set(true);
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Timber.i("Starting thread for %s", CancellableTask.this);
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try
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{
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execute();
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}
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finally
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{
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running.set(false);
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Timber.i("Stopping thread for %s", CancellableTask.this);
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}
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}
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});
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thread.get().start();
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}
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public static interface OnCancelListener
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{
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void onCancel();
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}
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} |