Try WebSocket communication with jooby.

Prerequisites

--jooby's QUICK START has ended

① Preparation of HTML for client

Place ws.html directly under the public directory.

The following is just a sample, so only the minimum methods are described.

`ws.html`


<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>WebSocket sample</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(function(){
    var ws = new WebSocket("ws://localhost:8080/ws");
    ws.onmessage = function(message){
        $("#log").prepend(message.data + "<br>");
    }
    $("#message").keyup(function(e){
        ws.send($(this).val());
    });
})
</script>
</head>
<body><input type="text" id="message"><div id="log"></div></body>
</html>

(2) Addition of processing on the server side

It is a simple configuration that receives a message, returns it to the sender, and broadcasts it.

`App.java`


	{
		assets("/ws.html", "ws.html");
		ws("/ws", ws -> {
			ws.onMessage(msg -> {
				ws.send("send : " + msg.value());
				ws.broadcast("broadcast : " + msg.value());
			});
		});
	}

③ Access http: //localhost:8080/ws.html from a browser on multiple tabs and enter a message in the text box.

In each tab, both the message I sent and the broadcast are displayed, so it seems to be working properly.

Tab 1

Tab 2

Finally

I think that it is very easy and easy to understand because simple ** WebSocket ** communication is possible with only this amount of description. However, if you are familiar with Java for a long time, it doesn't look like Java code.

[JAVA] Try WebSocket with jooby