| /** |
| * 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.apex.examples.mroperator; |
| |
| import java.io.IOException; |
| import java.io.PipedInputStream; |
| import java.io.PipedOutputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.apex.malhar.lib.util.KeyHashValPair; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.serializer.Deserializer; |
| import org.apache.hadoop.io.serializer.SerializationFactory; |
| import org.apache.hadoop.io.serializer.Serializer; |
| import org.apache.hadoop.mapred.OutputCollector; |
| |
| /** |
| * <p>OutputCollectorImpl class.</p> |
| * |
| * @since 0.9.0 |
| */ |
| @SuppressWarnings("unchecked") |
| public class OutputCollectorImpl<K extends Object, V extends Object> implements OutputCollector<K, V> |
| { |
| private static final Logger logger = LoggerFactory.getLogger(OutputCollectorImpl.class); |
| |
| private List<KeyHashValPair<K, V>> list = new ArrayList<KeyHashValPair<K, V>>(); |
| |
| public List<KeyHashValPair<K, V>> getList() |
| { |
| return list; |
| } |
| |
| private transient SerializationFactory serializationFactory; |
| private transient Configuration conf = null; |
| |
| public OutputCollectorImpl() |
| { |
| conf = new Configuration(); |
| serializationFactory = new SerializationFactory(conf); |
| |
| } |
| |
| private <T> T cloneObj(T t) throws IOException |
| { |
| Serializer<T> keySerializer; |
| Class<T> keyClass; |
| PipedInputStream pis = new PipedInputStream(); |
| PipedOutputStream pos = new PipedOutputStream(pis); |
| keyClass = (Class<T>)t.getClass(); |
| keySerializer = serializationFactory.getSerializer(keyClass); |
| keySerializer.open(pos); |
| keySerializer.serialize(t); |
| Deserializer<T> keyDesiralizer = serializationFactory.getDeserializer(keyClass); |
| keyDesiralizer.open(pis); |
| T clonedArg0 = keyDesiralizer.deserialize(null); |
| pos.close(); |
| pis.close(); |
| keySerializer.close(); |
| keyDesiralizer.close(); |
| return clonedArg0; |
| |
| } |
| |
| @Override |
| public void collect(K arg0, V arg1) throws IOException |
| { |
| if (conf == null) { |
| conf = new Configuration(); |
| serializationFactory = new SerializationFactory(conf); |
| } |
| list.add(new KeyHashValPair<K, V>(cloneObj(arg0), cloneObj(arg1))); |
| } |
| } |