/**
* 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.apache.hbase.index.write.recovery;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.hadoop.hbase.regionserver.HRegion;
import com.google.common.collect.Multimap;
import org.apache.hbase.index.exception.MultiIndexWriteFailureException;
import org.apache.hbase.index.table.HTableInterfaceReference;
import org.apache.hbase.index.write.IndexFailurePolicy;
import org.apache.hbase.index.write.KillServerOnFailurePolicy;
/**
* Tracks any failed writes in The {@link PerRegionIndexWriteCache}, given a
* {@link MultiIndexWriteFailureException} (which is thrown from the
* {@link TrackingParallelWriterIndexCommitter}. Any other exception failure causes the a server
* abort via the usual {@link KillServerOnFailurePolicy}.
*/
public class StoreFailuresInCachePolicy implements IndexFailurePolicy {
private KillServerOnFailurePolicy delegate;
private PerRegionIndexWriteCache cache;
private HRegion region;
/**
* @param failedIndexEdits cache to update when we find a failure
*/
public StoreFailuresInCachePolicy(PerRegionIndexWriteCache failedIndexEdits) {
this.cache = failedIndexEdits;
}
@Override
public void setup(Stoppable parent, RegionCoprocessorEnvironment env) {
this.region = env.getRegion();
this.delegate = new KillServerOnFailurePolicy();
this.delegate.setup(parent, env);
}
@Override
public void handleFailure(Multimap<HTableInterfaceReference, Mutation> attempted, Exception cause) throws IOException {
// if its not an exception we can handle, let the delegate take care of it
if (!(cause instanceof MultiIndexWriteFailureException)) {
delegate.handleFailure(attempted, cause);
}
List<HTableInterfaceReference> failedTables =
((MultiIndexWriteFailureException) cause).getFailedTables();
for (HTableInterfaceReference table : failedTables) {
cache.addEdits(this.region, table, attempted.get(table));
}
}
@Override
public void stop(String why) {
this.delegate.stop(why);
}
@Override
public boolean isStopped() {
return this.delegate.isStopped();
}
}