| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.crunch.kafka.record; |
| |
| import org.apache.crunch.types.Converter; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.kafka.clients.consumer.ConsumerRecord; |
| |
| /** |
| * {@link Converter} for {@link KafkaSource} |
| */ |
| public class KafkaSourceConverter implements |
| Converter<ConsumerRecord<BytesWritable, BytesWritable>, Void, ConsumerRecord<BytesWritable, BytesWritable>, Iterable<ConsumerRecord<BytesWritable, BytesWritable>>> { |
| |
| private static final long serialVersionUID = 5270341393169043945L; |
| |
| @Override |
| public ConsumerRecord<BytesWritable, BytesWritable> convertInput(ConsumerRecord<BytesWritable, BytesWritable> record, |
| Void aVoid) { |
| return record; |
| } |
| |
| @Override |
| public Iterable<ConsumerRecord<BytesWritable, BytesWritable>> convertIterableInput( |
| ConsumerRecord<BytesWritable, BytesWritable> bytesWritableBytesWritableConsumerRecord, Iterable<Void> iterable) { |
| throw new UnsupportedOperationException("Should not be possible"); |
| } |
| |
| @Override |
| public ConsumerRecord<BytesWritable, BytesWritable> outputKey(ConsumerRecord<BytesWritable, BytesWritable> record) { |
| return record; |
| } |
| |
| @Override |
| public Void outputValue(ConsumerRecord<BytesWritable, BytesWritable> record) { |
| // No value, we just use the record as the key. |
| return null; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public Class<ConsumerRecord<BytesWritable, BytesWritable>> getKeyClass() { |
| return (Class<ConsumerRecord<BytesWritable, BytesWritable>>) (Object) ConsumerRecord.class; |
| } |
| |
| @Override |
| public Class<Void> getValueClass() { |
| return Void.class; |
| } |
| |
| @Override |
| public boolean applyPTypeTransforms() { |
| return false; |
| } |
| } |