/**
* Copyright 2012 Apache Wave
*
* 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 org.waveprotocol.box.server.waveserver;
import org.waveprotocol.box.common.ExceptionalIterator;
import org.waveprotocol.wave.model.id.WaveId;
import org.waveprotocol.wave.model.id.WaveletId;
import org.waveprotocol.wave.model.id.WaveletName;
/**
* Base implementation of {@link WaveIndexer}.
*
* @author yurize@apache.org (Yuri Zelikov)
*/
public abstract class AbstractWaveIndexer implements WaveIndexer {
protected final WaveMap waveMap;
protected final WaveletProvider waveletProvider;
public AbstractWaveIndexer(WaveMap waveMap, WaveletProvider waveletProvider) {
this.waveletProvider = waveletProvider;
this.waveMap = waveMap;
}
/**
* Forces all waves to be loaded into memory and processes each wavelet.
*/
@Override
public synchronized void remakeIndex() throws WaveletStateException, WaveServerException {
waveMap.loadAllWavelets();
ExceptionalIterator<WaveId, WaveServerException> witr = waveletProvider.getWaveIds();
while (witr.hasNext()) {
WaveId waveId = witr.next();
for (WaveletId waveletId : waveletProvider.getWaveletIds(waveId)) {
WaveletName waveletName = WaveletName.of(waveId, waveletId);
// Required to call this method to load the wavelet into memory.
waveletProvider.getSnapshot(waveletName);
processWavelet(waveletName);
}
}
}
/**
* Provdes a hook to process the wavelet.
*
* @param waveletName
*/
protected abstract void processWavelet(WaveletName waveletName);
/**
* Provides a hook to perform some logic after indexing was completed.
*/
protected abstract void postIndexHook();
protected WaveMap getWaveMap() {
return waveMap;
}
protected WaveletProvider getWaveletProvider() {
return waveletProvider;
}
}