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/*******************************************************************************
* Copyright (c) 2012, 2016 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.core.internal.utility.command;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jpt.common.core.utility.command.JobCommand;
import org.eclipse.jpt.common.core.utility.command.JobCommandContext;
import org.eclipse.jpt.common.core.utility.command.NotifyingRepeatingJobCommand;
import org.eclipse.jpt.common.utility.exception.ExceptionHandler;
import org.eclipse.jpt.common.utility.internal.ListenerList;
import org.eclipse.jpt.common.utility.internal.model.ModelTools;
/**
* @see org.eclipse.jpt.common.utility.internal.command.NotifyingRepeatingCommandWrapper
*/
public class NotifyingRepeatingJobCommandWrapper
extends RepeatingJobCommandWrapper
implements NotifyingRepeatingJobCommand
{
private final ListenerList<Listener> listenerList = ModelTools.listenerList();
// ********** construction **********
/**
* Construct a notifying repeating command wrapper that executes the
* specified command. Any exceptions thrown by the command or listener
* will be handled by the specified exception handler.
*/
public NotifyingRepeatingJobCommandWrapper(JobCommand command, ExceptionHandler exceptionHandler) {
super(command, exceptionHandler);
}
/**
* Construct a notifying repeating command wrapper that executes the
* specified command and uses the specified command context to execute the
* wrapped command whenever it is not already executing.
* Any exceptions thrown by the command or listener will be handled by the
* specified exception handler.
*/
public NotifyingRepeatingJobCommandWrapper(JobCommand command, JobCommandContext startCommandContext, ExceptionHandler exceptionHandler) {
super(command, startCommandContext, exceptionHandler);
}
// ********** listeners **********
public void addListener(Listener listener) {
this.listenerList.add(listener);
}
public void removeListener(Listener listener) {
this.listenerList.remove(listener);
}
// ********** override **********
@Override
/* private protected */ IStatus executeCommand(IProgressMonitor monitor) {
IStatus status = super.executeCommand(monitor);
if (status.getSeverity() == IStatus.CANCEL) {
this.executionCanceled();
}
else if (this.state.isQuiesced()) {
this.executionQuiesced();
}
return status;
}
/**
* Notify our listeners. All listeners are notified. There is no way to
* cancel the notifications (e.g. via a monitor or exception).
*/
private void executionQuiesced() {
for (Listener listener : this.listenerList) {
this.notifyListenerQuiesced(listener);
}
}
private void notifyListenerQuiesced(Listener listener) {
try {
listener.executionQuiesced(this);
} catch (Throwable ex) {
this.exceptionHandler.handleException(ex);
}
}
/**
* Notify our listeners. All listeners are notified. There is no way to
* cancel the notifications (e.g. via a monitor or exception).
*/
private void executionCanceled() {
for (Listener listener : this.listenerList) {
this.notifyListenerCanceled(listener);
}
}
private void notifyListenerCanceled(Listener listener) {
try {
listener.executionCanceled(this);
} catch (Throwable ex) {
this.exceptionHandler.handleException(ex);
}
}
}
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