Spring cloud Bus Refresh Event in spring cloud config server client :

First we need to install kafka server in system with the help of below link:

https://kafka.apache.org/quickstart

Setup spring cloud server and client with below wiki

https://soshace.com/spring-cloud-config-refresh-strategies/
https://soshace.com/centralize-the-configuration-of-services-with-spring-cloud-config/

Create github repository for maintaining the application profiles at center place.

repository structure: reponame: -.properties

Spring cloud server:

Whenever updating any value in profiles we can update the properties in each client without restarting the client applications, below are the 3 ways we can do

	1) Calling /actuator/refresh event at each client application
	2) By calling the /actuator/bus-refresh endpoint exposed on the config client integrated with Spring Cloud Bus.
	3) By calling the /monitor endpoint exposed on the config server integrated with Spring Cloud Bus

Working structure:

whenever we are updating using second point, below are the events will generated in the follwing order.
1) RefreshRemoteApplicationEvent - RefreshRemoteApplicationEvent is catched before refreshment of environment. So here the old value of property is printed.
2) EnvironmentChangeEvent - If you use the local varible you will get the old value and if you fetch from the env type of Environment class, you will get the new value
3) RefreshScopeRefreshedEvent - This event will be like finally in refresh bus concept.

Spring cloud Server code github repo:

curl --location --request POST 'http://localhost:9090/actuator/busrefresh'
curl --location --request POST 'http://localhost:9090/actuator/refresh'

Client Repositories:

https://github.com/NithishReddy/springclienttwo
https://github.com/NithishReddy/springclientone

SpringProfiles:

https://github.com/NithishReddy/springprofiles