| /* |
| * 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.kinesis; |
| |
| import org.apache.samza.system.IncomingMessageEnvelope; |
| import org.apache.samza.system.kinesis.consumer.KinesisIncomingMessageEnvelope; |
| import org.apache.samza.task.MessageCollector; |
| import org.apache.samza.task.StreamTask; |
| import org.apache.samza.task.TaskCoordinator; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * A sample task which consumes messages from kinesis stream and logs the message content. |
| */ |
| public class KinesisHelloSamza implements StreamTask { |
| private static final Logger LOG = LoggerFactory.getLogger(KinesisHelloSamza.class); |
| |
| public void process(IncomingMessageEnvelope envelope, MessageCollector collector, TaskCoordinator coordinator) { |
| KinesisIncomingMessageEnvelope kEnvelope = (KinesisIncomingMessageEnvelope) envelope; |
| long lagMs = System.currentTimeMillis() - kEnvelope.getApproximateArrivalTimestamp().getTime(); |
| LOG.info(String.format("Kinesis message key: %s Lag: %d ms", envelope.getKey(), lagMs)); |
| } |
| } |