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/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============================LICENSE_END===========================================
*/
package org.openecomp.dcae.apod.analytics.cdap.plugins.batch.sink.dmaap;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.NullWritable;
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.openecomp.dcae.apod.analytics.cdap.plugins.utils.DMaaPSinkConfigMapper;
import org.openecomp.dcae.apod.analytics.dmaap.DMaaPMRFactory;
import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig;
import org.openecomp.dcae.apod.analytics.dmaap.service.publisher.DMaaPMRPublisher;
import java.io.IOException;
/**
* DMaaP MR Output format used by DMaaP MR Sink Plugin to create a MR Publisher and pass to custom {@link
* DMaaPMRRecordWriter}
* <p>
* @author Rajiv Singla . Creation Date: 1/27/2017.
*/
public class DMaaPMROutputFormat extends OutputFormat<String, NullWritable> {
@Override
public RecordWriter<String, NullWritable> getRecordWriter(TaskAttemptContext context) throws IOException,
InterruptedException {
final Configuration configuration = context.getConfiguration();
final DMaaPMRPublisherConfig publisherConfig = DMaaPSinkConfigMapper.map(configuration);
final DMaaPMRPublisher publisher = DMaaPMRFactory.create().createPublisher(publisherConfig);
return new DMaaPMRRecordWriter(publisher);
}
@Override
public void checkOutputSpecs(JobContext context) throws IOException, InterruptedException {
// do nothing
}
@Override
public OutputCommitter getOutputCommitter(TaskAttemptContext context) throws IOException, InterruptedException {
return new NoOpOutputCommitter();
}
/**
* A dummy implementation for {@link OutputCommitter} that does nothing.
*/
protected static class NoOpOutputCommitter extends OutputCommitter {
@Override
public void setupJob(JobContext jobContext) throws IOException {
// no op
}
@Override
public void setupTask(TaskAttemptContext taskContext) throws IOException {
// no op
}
@Override
public boolean needsTaskCommit(TaskAttemptContext taskContext) throws IOException {
return false;
}
@Override
public void commitTask(TaskAttemptContext taskContext) throws IOException {
// no op
}
@Override
public void abortTask(TaskAttemptContext taskContext) throws IOException {
// no op
}
}
}
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