/*
* Copyright 2010-2013 10gen Inc.
*
* 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.
*/
package com.mongodb.hadoop;
import com.mongodb.hadoop.output.MongoOutputCommitter;
import com.mongodb.hadoop.output.MongoRecordWriter;
import com.mongodb.hadoop.util.MongoConfigUtil;
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 java.io.IOException;
public class MongoOutputFormat<K, V> extends OutputFormat<K, V> {
private final String[] updateKeys;
private final boolean multiUpdate;
public void checkOutputSpecs(final JobContext context) throws IOException {
if (MongoConfigUtil.getOutputURIs(context.getConfiguration()).isEmpty()) {
throw new IOException("No output URI is specified. You must set mongo.output.uri.");
}
}
public OutputCommitter getOutputCommitter(final TaskAttemptContext context) {
return new MongoOutputCommitter();
}
/**
* Get the record writer that points to the output collection.
*/
public RecordWriter<K, V> getRecordWriter(final TaskAttemptContext context) {
return new MongoRecordWriter(MongoConfigUtil.getOutputCollections(context.getConfiguration()), context);
}
public MongoOutputFormat() {
multiUpdate = false;
updateKeys = null;
}
public MongoOutputFormat(final String[] updateKeys, final boolean multiUpdate) {
this.updateKeys = updateKeys;
this.multiUpdate = multiUpdate;
}
}