/*
* 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 samza.examples.wikipedia.task;
import java.util.Map;
import org.apache.samza.system.IncomingMessageEnvelope;
import org.apache.samza.system.OutgoingMessageEnvelope;
import org.apache.samza.system.SystemStream;
import org.apache.samza.task.MessageCollector;
import org.apache.samza.task.StreamTask;
import org.apache.samza.task.TaskCoordinator;
import samza.examples.wikipedia.system.WikipediaFeed.WikipediaFeedEvent;
/**
* This task is very simple. All it does is take messages that it receives, and
* sends them to a Kafka topic called wikipedia-raw.
*/
public class WikipediaFeedStreamTask implements StreamTask {
private static final SystemStream OUTPUT_STREAM = new SystemStream("kafka", "wikipedia-raw");
@Override
public void process(IncomingMessageEnvelope envelope, MessageCollector collector, TaskCoordinator coordinator) {
Map<String, Object> outgoingMap = WikipediaFeedEvent.toMap((WikipediaFeedEvent) envelope.getMessage());
collector.send(new OutgoingMessageEnvelope(OUTPUT_STREAM, outgoingMap));
}
}
