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/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.core.subscribers;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.team.core.synchronize.ISyncInfoSetChangeListener;
import org.eclipse.team.core.synchronize.SyncInfoTree;
import org.eclipse.team.internal.core.Policy;
/**
* The <code>SubscriberSyncInfoSet</code> is a <code>SyncInfoSet</code> that provides the ability to add,
* remove and change <code>SyncInfo</code> and fires change event notifications to registered listeners.
* It also provides the ability
* to batch changes in a single change notification as well as optimizations for sync info retrieval.
*
* This class uses synchronized methods and synchronized blocks to protect internal data structures during both access
* and modify operations and uses an <code>ILock</code> to make modification operations thread-safe. The events
* are fired while this lock is held so clients responding to these events should not obtain their own internal locks
* while processing change events.
*
* TODO: Override modification methods to enforce use with handler
*
*/
public class SubscriberSyncInfoSet extends SyncInfoTree {
protected SubscriberEventHandler handler;
public SubscriberSyncInfoSet(SubscriberEventHandler handler) {
this.handler = handler;
}
@Override
public void connect(ISyncInfoSetChangeListener listener, IProgressMonitor monitor) {
if (handler == null) {
super.connect(listener, monitor);
} else {
connect(listener);
}
}
/**
* Variation of connect that does not need progress and does not throw an exception.
* Progress is provided by the background event handler and errors are passed through
* the chain to the view.
* @param listener
*/
public void connect(final ISyncInfoSetChangeListener listener) {
if (handler == null) {
// Should only use this connect if the set has a handler
throw new UnsupportedOperationException();
} else {
handler.run(monitor -> {
try {
beginInput();
monitor.beginTask(null, 100);
removeSyncSetChangedListener(listener);
addSyncSetChangedListener(listener);
listener.syncInfoSetReset(SubscriberSyncInfoSet.this, Policy.subMonitorFor(monitor, 95));
} finally {
endInput(Policy.subMonitorFor(monitor, 5));
monitor.done();
}
}, true /* high priority */);
}
}
}
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