/*
* 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.giraph.hive.output;
import com.facebook.giraph.hive.output.HiveApiOutputFormat;
import com.facebook.giraph.hive.record.HiveWritableRecord;
import java.io.IOException;
import org.apache.giraph.hive.common.HiveProfiles;
import org.apache.giraph.io.VertexOutputFormat;
import org.apache.giraph.io.VertexWriter;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.OutputCommitter;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
/**
* VertexOutputFormat using Hive
*
* @param <I> Vertex ID
* @param <V> Vertex Value
* @param <E> Edge Value
*/
public class HiveVertexOutputFormat<I extends WritableComparable,
V extends Writable, E extends Writable>
extends VertexOutputFormat<I, V, E> {
/** Underlying Hive OutputFormat used */
private final HiveApiOutputFormat hiveOutputFormat;
/**
* Create vertex output format
*/
public HiveVertexOutputFormat() {
hiveOutputFormat = new HiveApiOutputFormat();
hiveOutputFormat.setMyProfileId(HiveProfiles.VERTEX_OUTPUT_PROFILE_ID);
}
@Override
public VertexWriter<I, V, E> createVertexWriter(TaskAttemptContext context)
throws IOException, InterruptedException {
RecordWriter<WritableComparable, HiveWritableRecord> baseWriter =
hiveOutputFormat.getRecordWriter(context);
HiveVertexWriter<I, V, E> writer = new HiveVertexWriter<I, V, E>();
writer.setBaseWriter(baseWriter);
writer.setTableSchema(hiveOutputFormat.getTableSchema(getConf()));
return writer;
}
@Override
public void checkOutputSpecs(JobContext context)
throws IOException, InterruptedException {
hiveOutputFormat.checkOutputSpecs(context);
}
@Override
public OutputCommitter getOutputCommitter(TaskAttemptContext context)
throws IOException, InterruptedException {
return hiveOutputFormat.getOutputCommitter(context);
}
}