| /** |
| * 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.storm.trident.operation; |
| |
| import java.io.Serializable; |
| import java.util.Map; |
| import org.apache.storm.trident.tuple.TridentTuple; |
| |
| |
| public interface GroupedMultiReducer<T> extends Serializable { |
| void prepare(Map<String, Object> conf, TridentMultiReducerContext context); |
| |
| T init(TridentCollector collector, TridentTuple group); |
| |
| void execute(T state, int streamIndex, TridentTuple group, TridentTuple input, TridentCollector collector); |
| |
| void complete(T state, TridentTuple group, TridentCollector collector); |
| |
| void cleanup(); |
| } |