Java tutorial
/* * 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.zjy.mongo.mapred.output; import com.mongodb.DBCollection; import org.apache.hadoop.mapred.JobConf; import org.apache.hadoop.mapred.RecordWriter; import org.apache.hadoop.mapred.Reporter; import org.apache.hadoop.mapred.TaskAttemptContextImpl; import org.apache.hadoop.mapred.TaskAttemptID; import java.util.Collections; import java.util.List; public class MongoRecordWriter<K, V> extends com.zjy.mongo.output.MongoRecordWriter<K, V> implements RecordWriter<K, V> { private final JobConf configuration; /** * Create a new MongoRecordWriter. * @param conf the job configuration */ public MongoRecordWriter(final JobConf conf) { super(Collections.<DBCollection>emptyList(), new TaskAttemptContextImpl(conf, TaskAttemptID.forName(conf.get("mapred.task.id")))); configuration = conf; } /** * @deprecated MongoRecordWriter doesn't use DBCollections directly. * Please use {@link #MongoRecordWriter(JobConf)} instead. * @param c the DBCollection * @param conf the job configuration */ @Deprecated public MongoRecordWriter(final List<DBCollection> c, final JobConf conf) { this(conf); } public void close(final Reporter reporter) { super.close(getContext()); } public JobConf getConf() { return configuration; } }