/*
* Copyright 2008-2009 LinkedIn, Inc
*
* 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 voldemort.store.readonly.mr;
import java.io.IOException;
import java.io.StringReader;
import java.util.List;
import org.apache.hadoop.mapred.JobConf;
import voldemort.VoldemortException;
import voldemort.cluster.Cluster;
import voldemort.store.StoreDefinition;
import voldemort.xml.ClusterMapper;
import voldemort.xml.StoreDefinitionsMapper;
/**
* A base class with basic configuration values shared by all the mapper,
* reducer, and partitioner
*
*
*/
public class AbstractStoreBuilderConfigurable {
private int numChunks;
private Cluster cluster;
private StoreDefinition storeDef;
private boolean saveKeys;
private boolean reducerPerBucket;
public void configure(JobConf conf) {
this.cluster = new ClusterMapper().readCluster(new StringReader(conf.get("cluster.xml")));
List<StoreDefinition> storeDefs = new StoreDefinitionsMapper().readStoreList(new StringReader(conf.get("stores.xml")));
if(storeDefs.size() != 1)
throw new IllegalStateException("Expected to find only a single store, but found multiple!");
this.storeDef = storeDefs.get(0);
this.numChunks = conf.getInt("num.chunks", -1);
if(this.numChunks < 1)
throw new VoldemortException("num.chunks not specified in the job conf.");
this.saveKeys = conf.getBoolean("save.keys", false);
this.reducerPerBucket = conf.getBoolean("reducer.per.bucket", false);
}
@SuppressWarnings("unused")
public void close() throws IOException {}
public Cluster getCluster() {
checkNotNull(cluster);
return cluster;
}
public boolean getSaveKeys() {
return this.saveKeys;
}
public boolean getReducerPerBucket() {
return this.reducerPerBucket;
}
public StoreDefinition getStoreDef() {
checkNotNull(storeDef);
return storeDef;
}
public String getStoreName() {
checkNotNull(storeDef);
return storeDef.getName();
}
private final void checkNotNull(Object o) {
if(o == null)
throw new VoldemortException("Not configured yet!");
}
public int getNumChunks() {
return this.numChunks;
}
}