org.apache.rocketmq.client.java.example.PushConsumerExample Maven / Gradle / Ivy
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* 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
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.rocketmq.client.java.example;
import java.io.IOException;
import java.util.Collections;
import org.apache.rocketmq.client.apis.ClientConfiguration;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.client.apis.ClientServiceProvider;
import org.apache.rocketmq.client.apis.SessionCredentialsProvider;
import org.apache.rocketmq.client.apis.StaticSessionCredentialsProvider;
import org.apache.rocketmq.client.apis.consumer.ConsumeResult;
import org.apache.rocketmq.client.apis.consumer.FilterExpression;
import org.apache.rocketmq.client.apis.consumer.FilterExpressionType;
import org.apache.rocketmq.client.apis.consumer.PushConsumer;
import org.apache.rocketmq.shaded.org.slf4j.Logger;
import org.apache.rocketmq.shaded.org.slf4j.LoggerFactory;
public class PushConsumerExample {
private static final Logger log = LoggerFactory.getLogger(PushConsumerExample.class);
private PushConsumerExample() {
}
public static void main(String[] args) throws ClientException, IOException, InterruptedException {
final ClientServiceProvider provider = ClientServiceProvider.loadService();
// Credential provider is optional for client configuration.
String accessKey = "yourAccessKey";
String secretKey = "yourSecretKey";
SessionCredentialsProvider sessionCredentialsProvider =
new StaticSessionCredentialsProvider(accessKey, secretKey);
String endpoints = "foobar.com:8080";
ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
.setEndpoints(endpoints)
.setCredentialProvider(sessionCredentialsProvider)
.build();
String tag = "yourMessageTagA";
FilterExpression filterExpression = new FilterExpression(tag, FilterExpressionType.TAG);
String consumerGroup = "yourConsumerGroup";
String topic = "yourTopic";
PushConsumer pushConsumer = provider.newPushConsumerBuilder()
.setClientConfiguration(clientConfiguration)
// Set the consumer group name.
.setConsumerGroup(consumerGroup)
// Set the subscription for the consumer.
.setSubscriptionExpressions(Collections.singletonMap(topic, filterExpression))
.setMessageListener(messageView -> {
// Handle the received message and return consume result.
log.info("Consume message={}", messageView);
return ConsumeResult.SUCCESS;
})
.build();
// Block the main thread, no need for production environment.
Thread.sleep(Long.MAX_VALUE);
// Close the push consumer when you don't need it anymore.
pushConsumer.close();
}
}