web-applications

debugging JBoss 100% CPU usage

Originally posted on Server Fault, where it was suggested this question might better asked here. We are using JBoss to run two of our WARs. One is our web app, the other is our web service. The web app accesses a database on another machine and makes requests to the web service. The web service makes JMS requests to other machines, aggr...

Java - Problem in deploying Web Application

I have built a Java Web Application and packed it in a .war file and tested it on my local tomcat server and it is running fine. But when I deployed it on my client's server, it is showing an error. According to the remote server (my client's server), it is not finding a tld file packed in a jar file which I had placed in WEB-INF/lib di...

File sharing service with an API?

Hello! Is there a file sharing service akin to Dropbox or SugarSync that would offer an API? I would like to add a file sharing service to a website, but the full Dropbox interface is still too complicated for my users, so that I’d like an API to build a dead-simple list of files integrated to the website. There is a Dropbox API project ...

Spring Application Context Switch at Runtime

Hi, I'm wondering if it is possible to change which application context your app is using at run time. The use case would be: I have a GUI that allows you create queuing networks. It also allows you to select which simulation library you would like to use run the model you've just created. Each library has its own application contex...

Continuous Integration or Publishing System

I've been testing Hudson for a few days now and for PHP projects it seems ok; What I need though is a system that will allow me to publish an SVN tag to an FTP folder without adding a pile of rubbish on the end; hudson gets overexcited and adds a pile of folders to the export. Are their any other decent systems; it needs to be simple to ...

Managing execution priorities and request expiry time in your web application

Some installations that run our applications can be under hefty stress on a busy day. Our clients ask us is there is a way to manage priorities in our application. For example, in a typical internet banking application, banks are interested in having the form “Transfer money” responsive, while the “Statement” page is a lot less critical....

how to build good python web application

hello i never worked with web programming and i've been asked lately to write a web-based software to manage assets and tasks. to be used by more than 900 persons what are the recommended modules , frameworks , libraries for this task. and it will be highly appreciated if you guyz recommend some books and articles that might help me...

Regular expressions in URL Rewrite Module for IIS7

I have following rewrite rule to append .aspx extension if url has no extension. <rule name="SimpleRewrite" stopProcessing="true"> <match url="^(.*(?&lt;=/)([^/.]*))$" /> <action type="Rewrite" url="{R:1}.aspx" /> </rule> However the rule is not working: Error HTTP 500.52 - URL Rewrite Module Error. The ex...

How do I update a webpage with the progress of a server-side task?

Hi everyone, I'm working on a web project that takes the results from a survey type application, and runs them through a bunch of calculations to come up with some recommended suggestions for the user. Now, this calculation might take a minute or so, so I'd like to be able to give the user some update on it's progress. Obviously, the ...

Giving users a "reputation system" - Should I... ?

Hi folks, I'm thinking of adding a reputation system to a web application, the site is already being used so I'm trying to be careful about my choices. I'm developing in Django/Python, thought this would be important. Reputation is generated in all actions that contribute to the site, similar to Stackoverflow's system. I know there a...

Branch structure for a web site

I was recently reading the TFS Branching Guide and it suggests a branch for every release. For a web site, there is only one "version" released at a time. In that case is it appropriate to have a single "Production" branch? Then, during the process of preparing for a release, you merge changes from the Main branch into Production. (As op...

Do I need to auto-login after account activation?

This is the standard scenario: User registers on the site User receives an account activation email, clicks link to activate Web site notifies the user that account is activated Now there are at least two pathways: User is taken to the login screen and asked to enter login details User is automatically logged in and taken to a welc...

downloaded zip file returns zero has 0 bytes as size

I have written a Java web application that allows a user to download files from a server. These files are quite large and so are zipped together before download. It works like this: 1. The user gets a list of files that match his/her criteria 2. If the user likes a file and wants to download he/she selects it by checking a checkbox 3. ...

How to make a legacy webapp spring aware at the container level for bean autowire into Servlets?

We have a legacy web application (not Spring based) and are looking for best practices to autowire some newer Spring configured (thread safe) service beans into instance variables in several of the legacy servlets. Rewriting every servlet to Spring MVC is out of scope. For testability, we do not want any Spring specific bean lookup cod...

Categories and Tagging in a Web Application

I'm creating a small trivia site and would like to know if anyone has insight as to how I could categorize the trivia questions/quizzes so that it does not hinder the "typical browse around and answer questions" type of user, as opposed to one who uses the search engine to explicitly find trivia of interest. Trivia content will be creat...

Loading a class file immediately AFTER startup

We have a few war files deployed inside an ear file. Some of the war files have a class that caches static data from our PLM system in singletons. Since some of the classes take several minutes to load we use the load-on-startup in the web.xml to load them ahead of time. This all works fine until we attempt to re-deploy the applicatio...

Jetty 6 - VirtualHosting

Hi all, I am using Jetty 6 to host multiple web applications for various domains. I am doing the exploded WAR route, so how would I configure that in Jetty? Would I still set the war path and then say extractWar = false? http://jetty.codehaus.org/jetty/jetty-6/apidocs/org/mortbay/jetty/webapp/WebAppContext.html <Configure class="org...

What is the length of time to send a list of 200,000 integers from a client's browser to an internet sever?

Over the connections that most people in the USA have in their homes, what is the approximate length of time to send a list of 200,000 integers from a client's browser to an internet sever (say Google app engine)? Does it change much if the data is sent from an iPhone? How does the length of time increase as the size of the integer list...

Handling multiple sessions for same user credentials and avoiding new browser window opening in my web application.

Hello. I want to handle following scenarios in my new web application. If multiple users log into the application with same credentials, the application should deny access. Since I have out of process session store, I would be able to make out when this situation happens. So I can deny all requests after first successful attempt. This ...

How would you organize a large complex web application (see basic example)?

Just to keep things interesting and close my final open question, the solution that implements the below functionality in a nicely organized manner with a decent architecture gets a good bounty. The full code is on jsfiddle, and feel free to ask any questions :) How do you usually organize complex web applications that are extremely r...