The scheduler service is a service that is supposed to do backend jobs, such as verifying that the payment has been received, reading or transferring the data for different reports for management, and so on.

Each microservice here has its own database, and each microservice can have a different microservice. This makes our application technology agnostic. This is easy if we are thinking from scratch. If we have to migrate it from a monolithic application to a microservice application, then the appropriate method is to take the scheduler and communicator service and separate them out to try to run these roles separately. After completing this task successfully, you can think of taking the catalog service out, and so on. The final picture of your application would be something like the following: