Milen Dyankov's blog

This post will demonstrate how liferay-maven-sdk can be employed to build a Liferay portlet using Liferay's Service Builder feature. For this purpose we will create service-builder-portlet which is capable of displaying a list of players and adding a new player to this list. The model, persistence layer and data access services will be generated by Service Builder.
But first things first. Download and install  liferay-maven-sdk if you haven't done so already (have a look at  "Download and Install" page for instructions). Once liferay-maven-sdk is installed in your local repository, you can create the portlet.

It seems to get more and more cloudy in the IT world these days . It's a matter of time before the rain (of applications) starts. When this happen one will need the proper tools, to be able to add his/hers own few drops.

So I though it's about time to start experimenting with Google Web Toolkit. What I like the most about GWT is it's "hosted mode". The fact that Java code changes reflect the GUI right away and one don't have to wait for generate, compile, build, deploy, ... steps to complete is really speeding up the development process.

Since 99% of my projects use Maven the first thing to look for (after reading GWT tutorials) was a GWT maven plug-in. No surprise here - there is one (http://mojo.codehaus.org/gwt-maven-plugin). The GWT docs and gwt-maven-plugin docs gives a lot of information how to create and build GWT applications.  Unfortunately the released version of  gwt-maven-plugin (1.0 at the time of writing) does not support hosted mode.

If an ATG based web application is available under few subdomains (domain.com, www.domain.com, shop.domain.com) keeping track of session cookies across subdomains may be a challenge. Session tracking cookies (like jsessionid) usually do not have domain property set, which means they are sent back to exactly the same host they came from. So if visitors switch to another subdomain while navigating through the application they would most likely end up having a new session. Depending on what information session holds, the number of visitors and how many simultaneous sessions the server can handle, this may or may not be a problem.

Don't know why but every once in a while I find myself reading some article, tutorial or case study about error handling and creating useful error messages. No doubt it's very important in what way you serve the bad news (which error messages actually are). But on the other hand, how much time one can spend on error handling and constructing good error messages?

Welcome to my new blog powered by Movable Type. Finally got it up and running but it took me a few hours. Cutting the long story short, here is a note of what problems I had and how they were solved.

A friend of mine recently asked me about merging survey results, which reminded me I had similar problem about an year ago and have written a peace of code to solve it. It's not a framework or user friendly application and it's not well documented. It was written in a couple of hours to solve particular problem, but in case anyone is interested here is  so called SpreadSurvey.

Some time ago a set of files ware committed to CVS repository and tagged (lets say with TAG1) . These files have changed a few times since then. Today I needed to tag the latest versions of all files that have ever been tagged TAG1 with TAG2.