| /** |
| * 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.apex.malhar.contrib.util; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.datatorrent.api.DefaultInputPort; |
| import com.datatorrent.common.util.BaseOperator; |
| |
| public class TupleCacheOutputOperator<T> extends BaseOperator |
| { |
| private static final long serialVersionUID = 3090932382383138500L; |
| private static final Logger logger = LoggerFactory.getLogger( TupleCacheOutputOperator.class ); |
| |
| //one instance of TupleCacheOutputOperator map to one |
| private static Map<String, List<?>> receivedTuplesMap = new HashMap<>(); |
| |
| public final transient DefaultInputPort<T> inputPort = new DefaultInputPort<T>() |
| { |
| @Override |
| public void process(T tuple) |
| { |
| processTuple( tuple ); |
| } |
| }; |
| |
| private String uuid; |
| |
| public TupleCacheOutputOperator() |
| { |
| uuid = java.util.UUID.randomUUID().toString(); |
| } |
| |
| public String getUuid() |
| { |
| return uuid; |
| } |
| |
| public void processTuple( T tuple ) |
| { |
| List<T> receivedTuples = (List<T>)receivedTuplesMap.get(uuid); |
| if ( receivedTuples == null ) { |
| receivedTuples = new ArrayList<T>(); |
| receivedTuplesMap.put(uuid, receivedTuples); |
| } |
| receivedTuples.add(tuple); |
| logger.info( "received a tuple. total received tuple size is {}. instance is {}.", receivedTuples.size(), System.identityHashCode(this) ); |
| } |
| |
| public List<T> getReceivedTuples() |
| { |
| return (List<T>)receivedTuplesMap.get(uuid); |
| } |
| |
| public static List<Object> getReceivedTuples( String uuid ) |
| { |
| return (List<Object>)receivedTuplesMap.get(uuid); |
| } |
| } |