/*
* This file is provided 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 com.basho.riak.hadoop;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import com.basho.riak.client.IRiakClient;
import com.basho.riak.client.RiakException;
import com.basho.riak.client.bucket.Bucket;
import com.basho.riak.hadoop.config.ClientFactory;
import com.basho.riak.hadoop.config.RiakConfig;
/**
* Writes reducer results to Riak
*
* @author russell
* @param <V>
*
*/
public class RiakRecordWriter<V> extends RecordWriter<Text, V> {
private final Bucket bucket;
RiakRecordWriter(TaskAttemptContext tac) throws RiakException {
Configuration conf = tac.getConfiguration();
IRiakClient client = ClientFactory.clusterClient(RiakConfig.getRiakLocatons(conf));
bucket = client.fetchBucket(RiakConfig.getOutputBucket(conf)).execute();
}
/*
* (non-Javadoc)
*
* @see
* org.apache.hadoop.mapreduce.RecordWriter#close(org.apache.hadoop.mapreduce
* .TaskAttemptContext)
*/
@Override public void close(TaskAttemptContext tac) throws IOException, InterruptedException {
// NO-OP
}
/*
* (non-Javadoc)
*
* @see org.apache.hadoop.mapreduce.RecordWriter#write(java.lang.Object,
* java.lang.Object)
*/
@Override public void write(Text key, V value) throws IOException, InterruptedException {
try {
bucket.store(key.toString(), value).execute();
} catch (RiakException e) {
throw new IOException(e);
}
}
}