| /** |
| * 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.heron.streamlet.impl.sinks; |
| |
| import org.apache.heron.api.tuple.Tuple; |
| import org.apache.heron.streamlet.SerializableConsumer; |
| import org.apache.heron.streamlet.impl.operators.StreamletOperator; |
| |
| /** |
| * ConsumerSink is a very simple Sink that basically invokes a user supplied |
| * consume function for every tuple. |
| */ |
| public class ConsumerSink<R> extends StreamletOperator<R, R> { |
| |
| private static final long serialVersionUID = 8716140142187667638L; |
| private SerializableConsumer<R> consumer; |
| |
| public ConsumerSink(SerializableConsumer<R> consumer) { |
| this.consumer = consumer; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public void execute(Tuple tuple) { |
| R obj = (R) tuple.getValue(0); |
| consumer.accept(obj); |
| collector.ack(tuple); |
| } |
| } |