comet

I built my project using Struts, Spring, and Hibernate. I am using Tomcat for the server. Now I want to implement push notifications in my web application, to perform tasks like updating a table on a view layer according to new data in the database, or show a notification when a certain condition occurs. How can I implement this, and what tools should I use? Maybe Comet or something similar? If you have a link to a tutorial, I would find that helpful. I am also wondering whether this (push) is related to messaging? I've tried this link but it looks like pull. My case is like a chatting

I'm new to comet, but I have read about it and I realize that PHP is bad for comet long polling. All of my project is written in CodeIgniter PHP Framework, so all my code is PHP. But I need request data all seconds to update auctions products, and I'm looking for comet, but as PHP is a bad way to comet, how can I do it? also it is possible to read from MySQL and send to listener? Thanks. One solution is Ajax Push Engine - they dish out their own server for handling the connections with clients, but you can use whatever backend to feed data to APE - including PHP. You can also work with MySQL

I want to create a section in my site, where a user has a few simple update buttons. Each of these update buttons will be going to the server, and will do a long crunching behind the scene. While the server crunches data, I want the user to have a some kind of progress indicator, like progress bar or textual percentage. I'm using jQuery as my JavaScript library, and CodeIgniter (PHP) as the server-side framework, if it's important... What I was thinking about is using PHP's flush() function to report progress status to jQuery, but I'm not sure that jQuery's Ajax functions are reading the

I have a usecase for which I would like to know if HTML5's Server-sent-Events is suitable. Multiple clients (Javascript+HTML5 browsers) connect to the web server (with a Java EE backend). Each client could be looking at a different view at any time, depending on what is their object of interest. My Question is: How to keep multiple clients (on different views) up-to-date on the updates happening on the server-side, without flooding all clients with all updates on all views ? Important points that I need to consider are: Many clients might be interested in the same events. If two clients are

I'm looking for an example, how to implement a longpoling mechanism in java. I would love to use a stateless EJB. I know that something like that would work: @WebService(serviceName="mywebservice") @Stateless public class MyWebService { @WebMethod public String longPoll() { short ct = 0; while(someCondition == false && ct < 60) { sleep(1000); // 1 sec ct++; } if (someCondition) return "got value"; else return ""; } } Unfortunately i know that this does'nt scale. Can i return in the webmethod without finishing the response and finish it somewhere else? iirekm The thing you're trying to

I want to know how to use ajax push . i have learnt from various Web articles that Ajax push can be obtained by using few programmes like COMET, APE (AJAX PUSH ENGINE) etc.... But i want to know whether there is a simpler way of using it and what language is used to implement ajax push. because in the articles which i have seen. they are using java. which i did not learn :( so i would like to know whether there is something like : a javascript in your server which sets an interval to a particular item and then if any changes found then echo it out using php. ? please help me out for this . its

Can someone please explain me how the "Forever Frame" technique works ? A code example would be awesome! I went through all the material i could find in Google but i still don`t have much of an idea how it works. Dylan Schiemann gives a great explanation. In short, it uses "chunked encoding", a feature of HTTP/1.1 intended for an entirely different purpose, but which allows the server to maintain a connection to the client indefinitely, sending additional data to the client at will. As Dylan says : This technique is very low-latency because it avoids HTTP and TCP/IP set-up and tear-down by

I was trying to implement COMET chat using Async Processing defined in Servlet API 3. It was not working - chat got blocked, so I have created debug servlet to test async part only. This is my doGet method: @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { log.debug("doGet called"); int timeout = 30 + RandomUtils.nextInt(60); String message = RandomStringUtils.randomAlphanumeric(50 + RandomUtils.nextInt(250)); response.setHeader("Access-Control-Allow-Origin", "*"); final AsyncContext context = request.startAsync();