| /** |
| * 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 com.datatorrent.contrib.kafka; |
| |
| import kafka.message.Message; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Kafka input adapter operator with a single output port, which consumes String data from the Kafka message bus. |
| * <p></p> |
| * |
| * @displayName Kafka Single Port String Input |
| * @category Messaging |
| * @tags input operator, string |
| * |
| * @since 0.3.5 |
| */ |
| public class KafkaSinglePortStringInputOperator extends AbstractKafkaSinglePortInputOperator<String> |
| { |
| |
| /** |
| * Implement abstract method of AbstractActiveMQSinglePortInputOperator |
| */ |
| @Override |
| public String getTuple(Message message) |
| { |
| String data = ""; |
| try { |
| ByteBuffer buffer = message.payload(); |
| byte[] bytes = new byte[buffer.remaining()]; |
| buffer.get(bytes); |
| data = new String(bytes); |
| //logger.debug("Consuming {}", data); |
| } |
| catch (Exception ex) { |
| return data; |
| } |
| return data; |
| } |
| |
| } |