java - Spring-Boot : How can I add tomcat connectors to bind to controller

Question

In the Spring-Boot documentation, there is a section that describe how to enable multiple connectors for tomcat (http://docs.spring.io/spring-boot/docs/1.1.7.RELEASE/reference/htmlsingle/#howto-enable-multiple-connectors-in-tomcat).

But is there a way to simply add connectors to the existing one (the web and the management connectors)? And to bind them to some mvc controllers? What I want to do is to create some web services that are accessible on a different ports.

Answer 1

You could use a child application for each service, with each child configured to use a separate port by setting its server.port property. Any components that you want to be isolated should go in one of the children. Any components that you want to share should go in the parent.

Here's an example of this approach. There are two child applications, one listening on port 8080 and one listening on port 8081. Each contains a controller which is mapped to /one and /two respectively.

package com.example;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

public class Application {

    public static void main(String[] args) {
        SpringApplicationBuilder parentBuilder 
                = new SpringApplicationBuilder(ApplicationConfiguration.class);
        parentBuilder.child(ServiceOneConfiguration.class)
                .properties("server.port:8080").run(args);
        parentBuilder.child(ServiceTwoConfiguration.class)
                .properties("server.port:8081").run(args);      
    }

    @Configuration
    static class ApplicationConfiguration {

        @Bean
        public MySharedService sharedService() {
            return new MySharedService();

        }   
    }

    @Configuration
    @EnableAutoConfiguration
    static class ServiceOneConfiguration {

        @Bean
        public ControllerOne controller(MySharedService service) {
            return new ControllerOne(service);
        }
    }

    @Configuration
    @EnableAutoConfiguration
    static class ServiceTwoConfiguration {

        @Bean
        public ControllerTwo controller(MySharedService service) {
            return new ControllerTwo(service);
        }
    }

    @RequestMapping("/one")
    static class ControllerOne {

        private final MySharedService service;

        public ControllerOne(MySharedService service) {
            this.service = service;
        }

        @RequestMapping
        @ResponseBody
        public String getMessage() {
            return "ControllerOne says "" + this.service.getMessage() + """;
        }
    }

    @RequestMapping("/two")
    static class ControllerTwo {

        private final MySharedService service;

        public ControllerTwo(MySharedService service) {
            this.service = service;
        }

        @RequestMapping
        @ResponseBody
        public String getMessage() {
            return "ControllerTwo says "" + this.service.getMessage() + """;
        }
    }

   static class MySharedService {

        public String getMessage() {
            return "Hello";
        }
    }
}