Implementing Spring Boot messaging

In an ideal case, all microservice interactions are expected to happen asynchronously using publish-subscribe semantics. Spring Boot provides a hassle-free mechanism to configure messaging solutions:

In this example, we will create a Spring Boot application with a sender and receiver, both connected though an external queue. Perform the following steps:

Note

The full source code of this example is available as the chapter2.bootmessaging project in the code files of this book.

1. Create a new project using STS to demonstrate this capability. In this example, instead of selecting Web, select AMQP under I/O:

   

2. Rabbit MQ will also be needed for this example. Download and install the latest version of Rabbit MQ from https://www.rabbitmq.com/download.html.

   Rabbit MQ 3.5.6 is used in this book.

3. Follow the installation steps documented on the site. Once ready, start the RabbitMQ server via the following command:

   $./rabbitmq-server
   

4. Make the configuration changes to the application...