io.openmessaging.samples.consumer.PullConsumerApp Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
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package io.openmessaging.samples.consumer;
import io.openmessaging.api.Message;
import io.openmessaging.api.MessagingAccessPoint;
import io.openmessaging.api.OMS;
import io.openmessaging.api.PullConsumer;
import io.openmessaging.api.TopicPartition;
import java.util.List;
import java.util.Properties;
import java.util.Set;
public class PullConsumerApp {
public static void main(String[] args) {
//Load and start the vendor implementation from a specific OMS driver URL.
final MessagingAccessPoint messagingAccessPoint =
OMS.builder()
.endpoint("http://mq-instance-xxx-1234567890-test:8080")
.region("Shenzhen")
.driver("rocketmq")
.build();
Properties properties = new Properties();
//Start a PullConsumer to receive messages from the specific queue.
final PullConsumer consumer = messagingAccessPoint.createPullConsumer(properties);
//Register a shutdown hook to close the opened endpoints.
Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
@Override
public void run() {
consumer.shutdown();
}
}));
Set topicPartitions = consumer.topicPartitions("NS://TOPIC");
consumer.assign(topicPartitions);
consumer.start();
List message = consumer.poll(1000);
System.out.println("Received message: " + message);
//Acknowledge the consumed message
consumer.commitSync();
consumer.shutdown();
}
}