Spring Cloud Bus

Spring Cloud Bus makes it seamless to connect microservices to lightweight message brokers, such as Kafka and RabbitMQ.

The need for Spring Cloud Bus

Consider an example of making a configuration change in a microservice. Let's assume that there are five instances of Microservice A running in production. We would need to make an emergency configuration change. For example, let's make a change in localconfig-repo/microservice-a.properties:

    application.message=Message From Default Local 
      Git Repository Changed

For Microservice A to pick up this configuration change, we need to invoke a POST request on http://localhost:8080/refresh. The following command can be executed at command prompt to send a POST request:

curl -X POST http://localhost:8080/refresh

You will see the configuration change reflected at http://localhost:8080/message. The following is the response from the service:

    {"message":"Message From Default Local Git Repository Changed"}

We have five instances of...