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

It wasn't so difficult. I simply rewrote configuration from my old web.xml using Spring annotations.

package kjkrol;

import org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher;
import org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.embedded.ServletContextInitializer;
import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;

import javax.servlet.ServletContextListener;

@ComponentScan
@EnableAutoConfiguration
@SpringBootApplication
public class Application {

    public static void main(String[] args) {
            SpringApplication.run(Application.class, args);
    }

    @Bean
    public ServletContextInitializer initializer() {
            return servletContext -> {                      
                    // RestEasy configuration
                    servletContext.setInitParameter("resteasy.scan", "true");
                    servletContext.setInitParameter("resteasy.servlet.mapping.prefix", "/services");
            };
    }    

    @Bean
    public ServletContextListener restEasyBootstrap() {
            return new ResteasyBootstrap();
    }

    @Bean
    public ServletRegistrationBean restEasyServlet() {
            final ServletRegistrationBean registrationBean = new ServletRegistrationBean();
            registrationBean.setServlet(new HttpServletDispatcher());
            registrationBean.setName("restEasy-servlet");
            registrationBean.addUrlMappings("/services/*");
            registrationBean.addInitParameter("javax.ws.rs.Application", "kjkrol.MyRESTApplication");
            return registrationBean;
    }
}


package kjkrol;


import javax.ws.rs.core.Application;
import java.util.HashSet;
import java.util.Set;


public class MyRESTApplication extends Application {

    private final Set