FlightSimResource.java

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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 * The contents of this file are subject to the terms of either the GNU
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.jersey.examples.flight.resources;

import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import static javax.ws.rs.core.MediaType.APPLICATION_FORM_URLENCODED;

import javax.validation.constraints.NotNull;

import org.glassfish.jersey.examples.flight.internal.SimEngine;
import org.glassfish.jersey.media.sse.EventOutput;
import org.glassfish.jersey.media.sse.SseFeature;

/**
 * JAX-RS resource controlling the flight simulation.
 *
 * @author Marek Potociar (marek.potociar at oracle.com)
 */
@Path("simulation")
public class FlightSimResource {

    public static enum Command {
        START {
            @Override
            public String execute() {
                return SimEngine.start() ? "STARTED" : "ALREADY RUNNING";
            }
        },
        STOP {
            @Override
            public String execute() {
                return SimEngine.stop() ? "STOPPED" : "NOT RUNNING";
            }
        };

        public abstract String execute();
    }

    @POST
    @Consumes(APPLICATION_FORM_URLENCODED)
    public String execute(@NotNull @FormParam("command") String command) {
        Command cmd = Command.valueOf(command);
        return cmd.execute();
    }

    @GET
    @Path("events")
    @Produces(SseFeature.SERVER_SENT_EVENTS)
    public EventOutput connect() {
        EventOutput output = new EventOutput();
        SimEngine.register(output);
        return output;
    }
}