/**
* 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;
}
}