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/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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 com.motorola.studio.android.emulator.logic.stop;
import static com.motorola.studio.android.common.log.StudioLogger.error;
import static com.motorola.studio.android.common.log.StudioLogger.info;
import static com.motorola.studio.android.common.log.StudioLogger.warn;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.osgi.util.NLS;
import org.eclipse.sequoyah.vnc.protocol.PluginProtocolActionDelegate;
import org.eclipse.sequoyah.vnc.protocol.lib.ProtocolHandle;
import org.eclipse.sequoyah.vnc.vncviewer.registry.VNCProtocolRegistry;
import com.motorola.studio.android.common.utilities.EclipseUtils;
import com.motorola.studio.android.emulator.i18n.EmulatorNLS;
import com.motorola.studio.android.emulator.logic.AndroidLogicUtils;
import com.motorola.studio.android.emulator.logic.IAndroidLogicInstance;
/**
* DESCRIPTION:
* This class contains the business layer of the Android
* Emulator stop procedure
*
* RESPONSIBILITY:
* Stop any Android Emulator
*
* COLABORATORS:
* None.
*
* USAGE:
* Use the public method to stop a Android Emulator
*/
public class AndroidEmulatorStopper
{
private static Lock lock = new ReentrantReadWriteLock().writeLock();
private static final int MAX_LOCK_ATTEMPTS = 20;
/**
* Stops this instance, removing its viewer from Android Emulator View
*
* @param instance The device instance
* @param force If true do not ask the user if he/she wants to proceed
* @param monitor A progress monitor that will show the disposal
* action progress at UI
*
* @return True if the instance was stopped; false if the user chose not to stop it
*/
public static boolean stopInstance(final IAndroidLogicInstance instance, boolean force,
boolean kill, IProgressMonitor monitor)
{
if (instance == null)
{
error("Could not stop the protocol because the provided instance is null");
return false;
}
boolean canProceed = true;
// decision whether to actually stop or not comes from user
if (!force)
{
canProceed =
EclipseUtils.showQuestionDialog(EmulatorNLS.GEN_Question, NLS.bind(
EmulatorNLS.QUESTION_AndroidEmulatorStopper_StopEmulatorQuestion,
instance.getName()));
}
if (canProceed)
{
int attempts = 0;
boolean locked = lock.tryLock();
while (!locked && (attempts < MAX_LOCK_ATTEMPTS))
{
try
{
Thread.sleep(125);
}
catch (InterruptedException e)
{
//Do nothing!
}
locked = lock.tryLock();
attempts++;
}
if (locked)
{
if (monitor == null)
{
monitor = new NullProgressMonitor();
}
try
{
info("Stopping the Android Emulator instance");
monitor
.beginTask(EmulatorNLS.MON_AndroidEmulatorStopper_DisposingInstance,
200);
monitor.setTaskName(EmulatorNLS.MON_AndroidEmulatorStopper_DisposingInstance);
// Try to stop the protocol.
//
// This is not critical to the stop instance procedure, but it is
// desirable because the TmL's methods may do some cleanup
// before returning. The loop below tries to stop for some time (and
// give enough time for cleanup as well), but if TmL does not finish
// in an acceptable time, the stop instance procedure continues
try
{
info("Trying to stop the protocol");
// Try to implement a TmL independent code
ProtocolHandle handle = instance.getProtocolHandle();
if (handle != null)
{
PluginProtocolActionDelegate.requestStopProtocol(handle);
while (PluginProtocolActionDelegate.isProtocolRunning(handle))
{
Thread.sleep(250);
}
VNCProtocolRegistry.getInstance().unregister(handle);
info("Protocol stopped");
}
}
catch (Exception e)
{
error("There was an error while trying to stop the protocol");
}
// Try to implement a TmL independent code
instance.setProtocolHandle(null);
monitor.worked(100);
monitor.setTaskName(EmulatorNLS.MON_AndroidEmulatorStopper_StopVm);
if (kill)
{
AndroidLogicUtils.kill(instance);
}
info("Stopped the Android Emulator instance");
}
finally
{
monitor.done();
try
{
lock.unlock();
}
catch (Exception e)
{
warn("The thread that is releasing the lock is not the one which has it.");
}
}
}
else
{
canProceed = false;
}
}
return canProceed;
}
}
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