| /** |
| * 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.s4.wordcount; |
| |
| import org.apache.s4.core.App; |
| import org.apache.s4.core.ProcessingElement; |
| import org.apache.s4.core.Stream; |
| |
| public class WordCounterPE extends ProcessingElement { |
| |
| int wordCounter; |
| transient Stream<WordCountEvent> wordClassifierStream; |
| |
| private WordCounterPE() { |
| } |
| |
| public WordCounterPE(App app) { |
| super(app); |
| } |
| |
| public void setWordClassifierStream(Stream<WordCountEvent> stream) { |
| this.wordClassifierStream = stream; |
| } |
| |
| public void onEvent(WordSeenEvent event) { |
| |
| wordCounter++; |
| System.out.println("seen word " + event.getWord()); |
| // NOTE: it seems the id is the key for now... |
| wordClassifierStream.put(new WordCountEvent(getId(), wordCounter)); |
| |
| // add some tests for partition count and id |
| if (!((getApp().getPartitionCount() == 1) && (getApp().getPartitionId() == 0))) { |
| throw new RuntimeException("Invalid partitioning"); |
| } |
| |
| } |
| |
| @Override |
| protected void onCreate() { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| @Override |
| protected void onRemove() { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| } |