/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.waveprotocol.box.server.waveserver;
import org.waveprotocol.box.common.DeltaSequence;
import org.waveprotocol.wave.model.id.WaveId;
import org.waveprotocol.wave.model.id.WaveletId;
import org.waveprotocol.wave.model.id.WaveletName;
import org.waveprotocol.wave.model.operation.wave.AddParticipant;
import org.waveprotocol.wave.model.operation.wave.RemoveParticipant;
import org.waveprotocol.wave.model.operation.wave.TransformedWaveletDelta;
import org.waveprotocol.wave.model.operation.wave.WaveletOperation;
import org.waveprotocol.wave.model.version.HashedVersion;
import org.waveprotocol.wave.model.wave.ParticipantId;
import org.waveprotocol.wave.model.wave.data.ReadableWaveletData;
import org.waveprotocol.wave.util.logging.Log;
import java.util.concurrent.CopyOnWriteArraySet;
/**
* Forwards wavelet notifications that can cause index changes to subscribers.
*
* @author yurize@apache.org (Yuri Zelikov)
*/
public class PerUserWaveViewDistpatcher implements WaveBus.Subscriber, PerUserWaveViewBus {
private static final Log LOG = Log.get(PerUserWaveViewDistpatcher.class);
private static final CopyOnWriteArraySet<PerUserWaveViewBus.Listener> listeners =
new CopyOnWriteArraySet<PerUserWaveViewBus.Listener>();
@Override
public void waveletUpdate(ReadableWaveletData wavelet, DeltaSequence deltas) {
WaveletId waveletId = wavelet.getWaveletId();
WaveId waveId = wavelet.getWaveId();
WaveletName waveletName = WaveletName.of(waveId, waveletId);
if(LOG.isInfoLoggable()) {
LOG.info("Got update for " + waveId + " " + waveletId);
}
// Find whether participants were added/removed and update the views
// accordingly.
for (TransformedWaveletDelta delta : deltas) {
for (WaveletOperation op : delta) {
if (op instanceof AddParticipant) {
if(LOG.isInfoLoggable()) {
LOG.info("Update contains AddParticipant for " + ((AddParticipant)op).getParticipantId());
}
ParticipantId user = ((AddParticipant) op).getParticipantId();
// Check first if we need to update views for this user.
for (Listener listener : listeners) {
listener.onParticipantAdded(waveletName, user);
}
} else if (op instanceof RemoveParticipant) {
ParticipantId user = ((RemoveParticipant) op).getParticipantId();
for (Listener listener : listeners) {
listener.onParticipantRemoved(waveletName, user);
}
}
}
}
}
@Override
public void waveletCommitted(WaveletName waveletName, HashedVersion version) {
// No op.
}
@Override
public void addListener(Listener listener) {
listeners.add(listener);
}
@Override
public void removeListener(Listener listener) {
listeners.remove(listener);
}
}