Skip to main content

Web.xml 301

I am a J2EE consultant by profession. Like in every other profession, You learn new things every day. The project I consult for, is architected viewing far ahead technologically. Although Many in my own project disagree that the project is in pristine shape (code wise). But to me, All it needs is a little tidying up (complement that superior design). However, at the core, This one is a masterpiece. And being an aspiring architect, I have had yet another those "Best so Far" projects. Here are somethings I haven't done in the past but did in this project.

Filters:
Recently I have had close encounters with Filters. the Advanced version of them. We have Sitemesh, OpenSessionInView, Acegi all filtering the requests. Acegi Filter itself calls its own (Configurable) Filter Chain.

The most commonly use of a filter is on a url-pattern
<url-pattern>PATTERN_HERE</url-pattern>
- However, It can also be used on servlets using <servlet-name>directgroup</servlet-name> You can also combine them to get both url mapping and also servlet.
There is also a dispatcher (<dispatcher>VAL_HERE</dispatcher>) which can further filter based if it was REQUEST, FORWARD etc - More Doc here

Scriptlets:
I have not seen this before - but apparently, You can disable Scriplets on certain pages completely. <% %> doesn't work in those pages
You can achieve that like this
<jsp-property-group>
<url-pattern>/WEB-INF/*</url-pattern>
<scripting-invalid>true</scripting-invalid>
</jsp-property-group>


there will more coming in this series. I have to write a lot about Acegi. with time.. ;) check back later.

Leave comments in Guestbook
Labels:

Popular posts from this blog

Powered By

As it goes, We ought to give thanks to people who power us. This page will be updated, like the version page , to show all the tools, and people this site is Powered By! Ubuntu GIMP Firebug Blogger Google [AppEngine, Ajax and other Apis] AddtoAny Project Fondue jQuery
Read More >>

One page Stock

Alright.. That was a long absence. The whole last week I dint blog. I dint go away. I was "occupied". I was learning stock trading. Its very fascinating. I have a good weeeked blog for you all. Here is my experience. I can literally hyper-link every word from the following paragraphs, but I am writing it as simple as I can so you can look up the italicised words in wikipedia . I got a paper trading account from a brokerage firm . You need one brokerage account first. Then it can be an Equity account where all your money is yours or a Margin account , where some of the money is lent by the brokerage firm. Then I get Buying power , which is the dollor value of how much stocks you can buy. I can make profit by simple rules. Buy when Price is low. Sell when price is high. There is another more intersting way of earning money. Selling short . Thats when price is not high, per say, but when are confident that the price WILL go down. then buy back when its lowest. This is what
Read More >>

Decorator for Memcache Get/Set in python

I have suggested some time back that you could modularize and stitch together fragments of js and css to spit out in one HTTP connection. That makes the page load faster. I also indicated that there ways to tune them by adding cache-control headers. On the server-side however, you could have a memcache layer on the stitching operation. This saves a lot of Resources (CPU) on your server. I will demonstrate this using a python script I use currently on my site to generate the combined js and css fragments. So My stitching method is like this @memize(region="jscss") def joinAndPut(files, ext): res = files.split("/") o = StringIO.StringIO() for f in res: writeFileTo(o, ext + "/" + f + "." + ext) #writes file out ret = o.getvalue() o.close() return ret; The method joinAndPut is * decorated * by memize. What this means is, all calls to joinAndPut are now wrapped (at runtime) with the logic in memize. All you wa
Read More >>