/*
* Copyright 2013 NGDATA nv
*
* 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.lilyproject.sep;
import com.ngdata.sep.EventListener;
import com.ngdata.sep.SepEvent;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.util.Bytes;
import org.lilyproject.repository.api.IdGenerator;
import org.lilyproject.repository.api.RepositoryException;
import org.lilyproject.repository.api.RepositoryManager;
import org.lilyproject.repository.api.RepositoryUnavailableException;
import java.util.ArrayList;
import java.util.List;
import org.lilyproject.util.hbase.RepoAndTableUtil;
/**
* Base class for SEP {@link EventListener}s that process events from Lily record tables.
* Filters out non-record events and provides richer {@link LilySepEvent}s.
*/
public abstract class LilyEventListener implements EventListener {
private RepositoryManager repositoryManager;
private Log log = LogFactory.getLog(getClass());
public LilyEventListener(RepositoryManager repositoryManager) {
this.repositoryManager = repositoryManager;
}
@Override
public final void processEvents(List<SepEvent> events) {
List<LilySepEvent> lilyEvents = new ArrayList<LilySepEvent>(events.size());
for (SepEvent event : events) {
if (event.getPayload() == null) {
// The event is either not from a Lily table or not a normal record operation.
continue;
}
String[] repoAndTable = RepoAndTableUtil.getRepositoryAndTable(Bytes.toString(event.getTable()));
IdGenerator idGenerator = null;
try {
idGenerator = repositoryManager.getRepository(repoAndTable[0]).getIdGenerator();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException(e);
} catch (RepositoryUnavailableException e) {
log.warn(String.format("Skipping an event because repository is not available. "
+ "Repository: %s, table: %s, row: %s", repoAndTable[0], repoAndTable[1],
Bytes.toStringBinary(event.getRow())));
} catch (RepositoryException e) {
throw new RuntimeException(e);
}
lilyEvents.add(new LilySepEvent(idGenerator, repoAndTable[0], repoAndTable[1], event.getTable(),
event.getRow(), event.getKeyValues(), event.getPayload()));
}
processLilyEvents(lilyEvents);
}
public abstract void processLilyEvents(List<LilySepEvent> sepEvents);
}