在客户端（浏览器）的Java EE Web应用程序上播放音频

Question

We are trying to play audio on the client machine. It is a web application based on Java EE, wherein due to some event happening at server side, the client should ring a bell or something of that sort.

I am not aware of any such thing. Alternative is to use

Html5

, but then it's become browser dependent that the browser should be Html5 compatible. I cannot enforce this requirement onto the client.

I went through

Red5

but found it not very useful..

Please advise

Answer 1

There are two parts to the problem:

• playing sound in a browser
• the browser being notified of events on the server

For playing sounds, and to support a wide range of browsers, you have a number of options. HTML5 <audio> tag and Plugins (Flash, Java applet). You could also use a Javascript library such as Yahoo Media Player to make this easier. A starter is here .

The second problem is how to notify clients when an event on the server occurs. This could be done with AJAX calls polling the server. Since you are using Java EE, this could be made a bit more efficient using Asynchronous Servlets . You could also go down the WebSocket path with this as well, though there can be issues through proxy servers with this.