| /** |
| * 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.benchmark.dag; |
| |
| import org.apache.s4.base.Event; |
| import org.apache.s4.core.ProcessingElement; |
| import org.apache.s4.core.Stream; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class FirstPE extends ProcessingElement { |
| |
| private static Logger logger = LoggerFactory.getLogger(FirstPE.class); |
| |
| private Stream<Event> downstream; |
| |
| public void onEvent(Event event) { |
| |
| Long value = event.get("value", long.class); |
| logger.trace("FirstPE : {} -> {}", getId(), value); |
| Event outputEvent = new Event(); |
| // if we reuse the same key, with the same key finder, this event goes to the current node |
| outputEvent.put("key", int.class, event.get("key", int.class)); |
| outputEvent.put("value", String.class, "forwarded - " + value); |
| downstream.put(outputEvent); |
| } |
| |
| @Override |
| protected void onRemove() { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| @Override |
| protected void onCreate() { |
| // TODO Auto-generated method stub |
| |
| } |
| |
| public void setDownstream(Stream<Event> downstream) { |
| this.downstream = downstream; |
| } |
| |
| } |