| /** |
| * 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.streams; |
| |
| import java.io.Serializable; |
| |
| /** |
| * A wrapper for the stream state which can be used to query the state via {@link Stream#stateQuery(StreamState)}. |
| * |
| * @param <K> the key type |
| * @param <V> the value type |
| */ |
| public class StreamState<K, V> implements Serializable { |
| private final transient PairStream<K, V> stream; |
| |
| StreamState(PairStream<K, V> stream) { |
| this.stream = stream; |
| } |
| |
| public PairStream<K, V> toPairStream() { |
| return stream; |
| } |
| |
| ProcessorNode getUpdateStateNode() { |
| return (ProcessorNode) stream.node; |
| } |
| } |