Prepare the environment

Procedure

1. Use either of the following methods to add the dependency:
   • Add the dependency by using Maven:

     <dependency>
         <groupId>com.aliyun.openservices</groupId>
         <artifactId>ons-client</artifactId>
         <version>XXX</version>
         // Enter the latest version of the SDK for Java.
     </dependency>                            

   • Download the dependency JAR package: For the download link to the latest version, see the Release notes for the SDK for Java.
2. In the Message Queue for Apache RocketMQ console, create the resources, such as topics and group IDs, that you reference in the code.
   You can create resources based on the following two protocols:

   • HTTP: For more information, see Create resources.
   • TCP: For more information, see Create resources.

What to do next

More information

• Spring integration
• Use the exactly-once delivery semantics to send and subscribe to messages
• Send normal messages in one of three modes
• Send messages in multiple threads