How configure Spring-Boot app to continue to use RestEasy?

Question

I have an old web application (pure servlet, without Spring) that I want to run as fat-jar. This app provides a lot of REST services. I don\'t want to modified old code.

Answer 1

You can use RESTEasy Spring Boot starter. Here is how you do it:

Adding POM dependency

Add the Maven dependency below to your Spring Boot application pom file.

   com.paypal.springboot
   resteasy-spring-boot-starter
   2.1.1-RELEASE
   runtime

Registering JAX-RS application classes

Just define your JAX-RS application class (a subclass of Application) as a Spring bean, and it will be automatically registered. See the example below. See section JAX-RS application registration methods in How to use RESTEasy Spring Boot Starter for further information.

package com.test;

import org.springframework.stereotype.Component;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

@Component
@ApplicationPath("/sample-app/")
public class JaxrsApplication extends Application {
}

Registering JAX-RS resources and providers

Just define them as Spring beans, and they will be automatically registered. Notice that JAX-RS resources can be singleton or request scoped, while JAX-RS providers must be singletons.

Further information at the project GitHub page.