/*
* 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.bsp;
import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.OutputCommitter;
import org.apache.hadoop.mapreduce.OutputFormat;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.log4j.Logger;
import java.io.IOException;
/**
* This is for internal use only. Allows the vertex output format routines
* to be called as if a normal Hadoop job.
*/
public class BspOutputFormat extends OutputFormat<Text, Text> {
/** Class logger */
private static Logger LOG = Logger.getLogger(BspOutputFormat.class);
@Override
public void checkOutputSpecs(JobContext context)
throws IOException, InterruptedException {
ImmutableClassesGiraphConfiguration conf =
new ImmutableClassesGiraphConfiguration(context.getConfiguration());
if (!conf.hasVertexOutputFormat()) {
LOG.warn("checkOutputSpecs: ImmutableOutputCommiter" +
" will not check anything");
return;
}
conf.createVertexOutputFormat().checkOutputSpecs(context);
}
@Override
public OutputCommitter getOutputCommitter(TaskAttemptContext context)
throws IOException, InterruptedException {
ImmutableClassesGiraphConfiguration conf =
new ImmutableClassesGiraphConfiguration(context.getConfiguration());
if (!conf.hasVertexOutputFormat()) {
LOG.warn("getOutputCommitter: Returning " +
"ImmutableOutputCommiter (does nothing).");
return new ImmutableOutputCommitter();
}
return conf.createVertexOutputFormat().getOutputCommitter(context);
}
@Override
public RecordWriter<Text, Text> getRecordWriter(TaskAttemptContext context)
throws IOException, InterruptedException {
return new BspRecordWriter();
}
}