Java – how to configure spring boot applications to continue using resteasy?

I have an old web application (pure servlet without spring) and I want to run it as fat jar

Solution

You can use resteasy spring boot to start the program This is how you do it:

Add POM dependency

Add the following Maven dependency to the spring boot application POM file

<dependency>
   <groupId>com.paypal.springboot</groupId>
   <artifactId>resteasy-spring-boot-starter</artifactId>
   <version>2.1.1-RELEASE</version>
   <scope>runtime</scope>
</dependency>

Registering jax-rs application classes

Just define your Jax - RS application class (subclass of application) as a spring bean and it will be registered automatically See the example below For details, see the jax-rs application registration method section in how to use resteasy spring boot starter

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 {
}

Register jax-rs resources and providers

Just define them as spring beans and they will be registered automatically Note that Jax - RS resources can be singletons or request scopes, and Jax - RS providers must be singletons

Further information at the project GitHub page.