ch09

Chapter 9: Messaging

9.1 Configure JMS

Problem

How to use JMS in a Spring Boot application and how to connect to the JMS broker.

Solution

Spring Boot supports auto-configuration for ActiveMQ and Artemis. Adding one of those JMS Providers together with setting some properties in, respectively, the spring.activemq and spring.artemis namespace is everything needed.

9.2 Send Messages Using JMS

Problem

How to send messaes to other systems over JMS.

Solution

Use the Spring Boot-provided JmsTemplate to send and (optionally) convert messages.

9.3 Receive Messages Using JMS

Problem

How to read messages from a JMS destination so that you can handle them in a Spring Boot application.

Solution

Create a class and annotate methods with @JmsListener to bind it to a destination and handle incoming messages.

9.4 Configure RabbitMQ

Problem How to use AMQP messaging in a Spring Boot application and need to connect to the RabbitMQ broker.

Solution

Configure the appropriate spring.rabbitmq properties (minimal spring.rabbitmq.host) to connect to the exchange and be able to send and receive messages.

9.5 Send Messages Using RabbitMQ

Problem

How to send a message to a RabbitMQ broker so that the message can be delivered to the receiver.

Solution

Using the RabbitTemplate, messages can be sent to an exchange and provide a routing key.

9.6 Receive Messages Using RabbitMQ

Problem

How to receive messages from a RabbitMQ.

Solution

Annotating a method with @RabbitListener will bind it to a queue and let it receive messages.