| /** |
| * 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.util; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class TupleGenerateCacheOperator<T> extends POJOTupleGenerateOperator<T> |
| { |
| //one instance of TupleCacheOutputOperator map to one |
| private static Map< String, List<?> > emittedTuplesMap = new HashMap< String, List<?>>(); |
| |
| private String uuid; |
| |
| public TupleGenerateCacheOperator() |
| { |
| uuid = java.util.UUID.randomUUID().toString(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected void tupleEmitted( T tuple ) |
| { |
| List<T> emittedTuples = (List<T>)emittedTuplesMap.get(uuid); |
| if( emittedTuples == null ) |
| { |
| emittedTuples = new ArrayList<T>(); |
| emittedTuplesMap.put(uuid, emittedTuples); |
| } |
| emittedTuples.add(tuple); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public List<T> getTuples() |
| { |
| return (List<T>)emittedTuplesMap.get(uuid); |
| } |
| } |