org.apache.rocketmq.client.java.example.ProducerTransactionMessageExample Maven / Gradle / Ivy
/*
* 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.rocketmq.client.java.example;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
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.message.Message;
import org.apache.rocketmq.client.apis.producer.Producer;
import org.apache.rocketmq.client.apis.producer.SendReceipt;
import org.apache.rocketmq.client.apis.producer.Transaction;
import org.apache.rocketmq.client.apis.producer.TransactionChecker;
import org.apache.rocketmq.client.apis.producer.TransactionResolution;
import org.apache.rocketmq.shaded.org.slf4j.Logger;
import org.apache.rocketmq.shaded.org.slf4j.LoggerFactory;
public class ProducerTransactionMessageExample {
private static final Logger log = LoggerFactory.getLogger(ProducerTransactionMessageExample.class);
private ProducerTransactionMessageExample() {
}
public static void main(String[] args) throws ClientException, IOException {
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 topic = "yourTransactionTopic";
TransactionChecker checker = messageView -> {
log.info("Receive transactional message check, message={}", messageView);
// Return the transaction resolution according to your business logic.
return TransactionResolution.COMMIT;
};
Producer producer = provider.newProducerBuilder()
.setClientConfiguration(clientConfiguration)
// Set the topic name(s), which is optional. It makes producer could prefetch the topic route before
// message publishing.
.setTopics(topic)
// Set transactional checker.
.setTransactionChecker(checker)
.build();
final Transaction transaction = producer.beginTransaction();
// Define your message body.
byte[] body = "This is a transaction message for Apache RocketMQ".getBytes(StandardCharsets.UTF_8);
String tag = "yourMessageTagA";
final Message message = provider.newMessageBuilder()
// Set topic for the current message.
.setTopic(topic)
// Message secondary classifier of message besides topic.
.setTag(tag)
// Key(s) of the message, another way to mark message besides message id.
.setKeys("yourMessageKey-565ef26f5727")
.setBody(body)
.build();
try {
final SendReceipt sendReceipt = producer.send(message, transaction);
log.info("Send transaction message successfully, messageId={}", sendReceipt.getMessageId());
} catch (Throwable t) {
log.error("Failed to send message", t);
return;
}
// Commit the transaction.
transaction.commit();
// Or rollback the transaction.
// transaction.rollback();
// Close the producer when you don't need it anymore.
producer.close();
}
}