| /** |
| * 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.benchmark.kafka; |
| |
| import com.datatorrent.api.DefaultOutputPort; |
| import com.datatorrent.contrib.kafka.AbstractKafkaInputOperator; |
| |
| import kafka.message.Message; |
| |
| /** |
| * This operator emits one constant message for each kafka message received. |
| * So we can track the throughput by messages emitted per second in the stram platform. |
| * <p></p> |
| * @displayName Benchmark Partitionable Kafka Input |
| * @category Messaging |
| * @tags input operator |
| * |
| * @since 0.9.3 |
| */ |
| public class BenchmarkKafkaInputOperator extends AbstractKafkaInputOperator |
| { |
| /** |
| * The output port on which messages are emitted. |
| */ |
| public transient DefaultOutputPort<String> oport = new DefaultOutputPort<String>(); |
| |
| @Override |
| protected void emitTuple(Message message) |
| { |
| oport.emit("Received"); |
| } |
| |
| } |