Simple RESTful API using vertx-web

RestCrudHttpd.java

import io.vertx.core.Vertx;
import io.vertx.core.http.HttpMethod;
import io.vertx.core.http.HttpServer;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.Router;

public class RestCrudHttpd {

	public static void main(String[] args) {
		Vertx vertx = Vertx.vertx();
		HttpServer server = vertx.createHttpServer();

		Router mainRouter = Router.router(vertx);

		Router dbapiRouter = Router.router(vertx);
		mainRouter.mountSubRouter("/dbapi", dbapiRouter);

		dbapiRouter.route().handler(routingContext -> {
			System.out.println("http request is comming ...: " + routingContext.request().absoluteURI());
			routingContext.response().putHeader("Server", "autorest4db");
			routingContext.response().putHeader("Content-Type", "application/json;charset=UTF-8");
			routingContext.next();
		});

		dbapiRouter.route(HttpMethod.GET, "/:dbname").handler(routingContext -> {
			String dbname = routingContext.request().getParam("dbname");

			JsonObject json = new JsonObject().put("action", "list").put("dbname", dbname);
			routingContext.response().end(json.toString());
		});

		dbapiRouter.route(HttpMethod.GET, "/:dbname/:id").handler(routingContext -> {
			String dbname = routingContext.request().getParam("dbname");
			String id = routingContext.request().getParam("id");
			JsonObject json = new JsonObject().put("action", "detail").put("dbname", dbname).put("id", id);
			routingContext.response().end(json.toString());
		});

		dbapiRouter.route(HttpMethod.POST, "/:dbname").handler(routingContext -> {
			String dbname = routingContext.request().getParam("dbname");
			JsonObject json = new JsonObject().put("action", "create").put("dbname", dbname);
			routingContext.response().end(json.toString());
		});

		dbapiRouter.route(HttpMethod.PUT, "/:dbname/:id").handler(routingContext -> {
			String dbname = routingContext.request().getParam("dbname");
			String id = routingContext.request().getParam("id");
			
			JsonObject json = new JsonObject().put("action", "update").put("dbname", dbname).put("id", id);
			routingContext.response().end(json.toString());
		});

		dbapiRouter.route(HttpMethod.DELETE, "/:dbname/:id").handler(routingContext -> {
			String dbname = routingContext.request().getParam("dbname");
			String id = routingContext.request().getParam("id");
			JsonObject json = new JsonObject().put("action", "delete").put("dbname", dbname).put("id", id);
			routingContext.response().end(json.toString());
			
		});

		server.requestHandler(mainRouter::accept);

		server.listen(8080);
		System.out.println("listening on: 8080");
		

	}

}

testing url

curl -i -X GET http://localhost:8080/dbapi/student
curl -i -X GET http://localhost:8080/dbapi/student/1234
curl -i -X POST http://localhost:8080/dbapi/student
curl -i -X PUT http://localhost:8080/dbapi/student/1234
curl -i -X DELETE http://localhost:8080/dbapi/student/1234

GET /student

$ curl -i -X GET http://localhost:8080/dbapi/student
HTTP/1.1 200 OK
Server: autorest4db
Content-Type: application/json;charset=UTF-8
Content-Length: 36

{"action":"list","dbname":"student"}%

GET /student/1234

$ curl -i -X GET http://localhost:8080/dbapi/student/1234
HTTP/1.1 200 OK
Server: autorest4db
Content-Type: application/json;charset=UTF-8
Content-Length: 50

{"action":"detail","dbname":"student","id":"1234"}

POST /student

$ curl -i -X POST http://localhost:8080/dbapi/student
HTTP/1.1 200 OK
Server: autorest4db
Content-Type: application/json;charset=UTF-8
Content-Length: 38

{"action":"create","dbname":"student"}

PUT /student/1234

$ curl -i -X PUT http://localhost:8080/dbapi/student/1234
HTTP/1.1 200 OK
Server: autorest4db
Content-Type: application/json;charset=UTF-8
Content-Length: 50

{"action":"update","dbname":"student","id":"1234"}

DELETE /student/1234

$ curl -i -X DELETE http://localhost:8080/dbapi/student/1234
HTTP/1.1 200 OK
Server: autorest4db
Content-Type: application/json;charset=UTF-8
Content-Length: 50

{"action":"delete","dbname":"student","id":"1234"}

maven dependency

<dependency>
      <groupId>io.vertx</groupId>
      <artifactId>vertx-web</artifactId>
      <version>3.4.1</version>
</dependency>

重构-1

DbapiAction