org.apache.hadoop.hive.ql.exec.spark.SparkMergeFileRecordHandler Maven / Gradle / Ivy
/**
* 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.hadoop.hive.ql.exec.spark;
import java.io.IOException;
import java.util.Iterator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.ql.exec.AbstractFileMergeOperator;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.io.merge.MergeFileWork;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.plan.FileMergeDesc;
import org.apache.hadoop.hive.ql.plan.MapWork;
import org.apache.hadoop.hive.ql.plan.OperatorDesc;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import com.google.common.base.Preconditions;
/**
* Copied from MergeFileMapper.
*
* As MergeFileMapper is very similar to ExecMapper, this class is
* very similar to SparkMapRecordHandler
*/
public class SparkMergeFileRecordHandler extends SparkRecordHandler {
private static final String PLAN_KEY = "__MAP_PLAN__";
private static final Log LOG = LogFactory.getLog(SparkMergeFileRecordHandler.class);
private Operator op;
private AbstractFileMergeOperator mergeOp;
private Object[] row;
@SuppressWarnings("unchecked")
@Override
public void init(JobConf job, OutputCollector output, Reporter reporter) throws Exception {
super.init(job, output, reporter);
try {
jc = job;
MapWork mapWork = Utilities.getMapWork(job);
if (mapWork instanceof MergeFileWork) {
MergeFileWork mergeFileWork = (MergeFileWork) mapWork;
String alias = mergeFileWork.getAliasToWork().keySet().iterator().next();
op = mergeFileWork.getAliasToWork().get(alias);
if (op instanceof AbstractFileMergeOperator) {
mergeOp = (AbstractFileMergeOperator) op;
mergeOp.initializeOp(jc);
row = new Object[2];
abort = false;
} else {
abort = true;
throw new IllegalStateException(
"Merge file work's top operator should be an"
+ " instance of AbstractFileMergeOperator");
}
} else {
abort = true;
throw new IllegalStateException("Map work should be a merge file work.");
}
LOG.info(mergeOp.dump(0));
} catch (HiveException e) {
abort = true;
throw new RuntimeException(e);
}
}
@Override
public void processRow(Object key, Object value) throws IOException {
row[0] = key;
row[1] = value;
try {
mergeOp.process(row, 0);
} catch (HiveException e) {
abort = true;
throw new IOException(e);
}
}
@Override
public void processRow(Object key, Iterator values) throws IOException {
throw new UnsupportedOperationException("Do not support this method in "
+ this.getClass().getSimpleName());
}
@Override
public void close() {
LOG.info("Closing Merge Operator " + mergeOp.getName());
try {
mergeOp.closeOp(abort);
} catch (HiveException e) {
throw new RuntimeException(e);
}
}
@Override
public boolean getDone() {
return mergeOp.getDone();
}
}