[FIXED] How to use spring boot making a common library

Issue

Now I want to develop a common mail service for our systems. As we design, we want to develop a RabbitMQ producer and consumer. On consumer side, we could develop and deploy a Spring Boot or Spring Cloud application, but on producer side we want to give a common mail client like the interface below and make a jar dependency for other system.

interface MailClient {
  ListentableFuture send(Message message);
}

But i see spring boot and spring cloud using many declarative method and seems must use a application class, but i just want a class reference and not need deploy. i do not know how to implement it.

Solution

According to the documentation:

Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can "just run".

But Spring Boot is not the silver bullet which matches all situations. If you want to create a library, you can create a regular spring project which builds a jar and stores it in your company's repository, if you have one.

Answered By - jny