RestAPI.java Source code

Introduction

Here is the source code for RestAPI.java

Source

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import io.vertx.core.AbstractVerticle;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.Router;
import io.vertx.ext.web.RoutingContext;
import io.vertx.ext.web.handler.BodyHandler;

import java.util.HashMap;
import java.util.Map;

/**
 *
 * @author User
 */
public class RestAPI extends AbstractVerticle {

    private Map<String, JsonObject> products = new HashMap<>();

    @Override
    public void start() {

        setUpInitialData();
        Router router = Router.router(vertx);
        router.route().handler(BodyHandler.create());
        router.get("/products/:productID").handler(this::handleGetProduct);
        router.put("/products/:productID").handler(this::handleAddProduct);
        router.get("/products").handler(this::handleListProducts);

        vertx.createHttpServer().requestHandler(router::accept).listen(8081);
    }

    private void handleGetProduct(RoutingContext routingContext) {
        String productID = routingContext.request().getParam("productID");
        HttpServerResponse response = routingContext.response();
        if (productID == null) {
            sendError(400, response);
        } else {
            JsonObject product = products.get(productID);
            if (product == null) {
                sendError(404, response);
            } else {
                response.putHeader("content-type", "application/json").end(product.encodePrettily());
            }
        }
    }

    private void handleAddProduct(RoutingContext routingContext) {

        JsonObject project = new JsonObject(routingContext.getBodyAsString());

        project.getString("name");
        project.getString("board");
        project.getString("ic");
        project.getString("detail");
        project.getString("visibility");
        //        System.out.println("from post "+routingContext.getBodyAsString());
        //        String productID = routingContext.request().getParam("productID");
        HttpServerResponse response = routingContext.response();
        //        if (productID == null) {
        //            sendError(400, response);
        //        } else {
        //            JsonObject product = routingContext.getBodyAsJson();
        //            if (product == null) {
        //                sendError(400, response);
        //            } else {
        //                products.put(productID, product);
        response.end();
        //            }
        //        }
    }

    private void handleListProducts(RoutingContext routingContext) {
        JsonArray arr = new JsonArray();
        products.forEach((k, v) -> arr.add(v));
        routingContext.response().putHeader("content-type", "application/json").end(arr.encodePrettily());
    }

    private void sendError(int statusCode, HttpServerResponse response) {
        response.setStatusCode(statusCode).end();
    }

    private void setUpInitialData() {
        addProduct(new JsonObject().put("id", "prod3568").put("name", "Egg Whisk").put("price", 3.99).put("weight",
                150));
        addProduct(new JsonObject().put("id", "prod7340").put("name", "Tea Cosy").put("price", 5.99).put("weight",
                100));
        addProduct(
                new JsonObject().put("id", "prod8643").put("name", "Spatula").put("price", 1.00).put("weight", 80));
    }

    private void addProduct(JsonObject product) {
        products.put(product.getString("id"), product);
    }
}