Remote Interface

Books to read

2011-05-16T03:20:00.000-07:00

Data Structure
Clean Code
Refactoring
Effective Java
Pragmatic Programmer
Thinking in Java

testing links

2011-05-16T03:16:00.001-07:00

http://martinfowler.com/articles/mocksArentStubs.html

http://misko.hevery.com/code-reviewers-guide/

http://misko.hevery.com/code-reviewers-guide/flaw-constructor-does-real-work/

http://java.dzone.com/articles/static-methods-are-death-testa

http://www.codeproject.com/KB/cs/autp1.aspx#WorkOrder44

http://misko.hevery.com/2008/07/08/how-to-think-about-the-new-operator/

Lessons learned in testing

2011-05-16T03:15:00.001-07:00

1. define for almost everything an interface. Everything, means
everything that the other classes probabaly need (factories, services,
and alike). You should use interfaces, otherwise you can't create
mocks.
2. Inject everything a class need (its dependencies), for exmaple
using its constructor.
3. during testing, you create mocks for these dependencies, and give
them to your class. This way you are sure you are testing you class in
isolation.

Remark 1: A mock is infact the means by which you break up this chain
of dependencies, so that you can test you class in isolation; and not
testing 10 other classes as you are "unit" testing your class. Imagine
the example of testing AssignmentFactory.

createAssignment() method. In
order to create an assignement, AssignementFactory needs a
MailingFactory needs an ImageFactory needs .... . By injecting the
factories in constructors and using interfaces, you have the
possibility to mock them and isolate for example AssignmentFactory
implementation from implementation of MailingFactory using
MailingFactoryMock.

Remark 2: As a rule of thum, your code most consist of classes who do
work, and classes that create the object graph by creating new
objects. Hence the classes who do work, should not contain "new"
statements.

and so you code ... :D

2010-09-25T00:35:00.001-07:00

http://www.youtube.com/watch?v=Eq3CuMDXaPs

I lost something - I find something

2010-09-25T00:34:00.001-07:00

idea for a web 2.0 lost porperty site

RichFaces modal panel containing a form causes problem

2010-03-16T02:35:00.000-07:00

1. put a rich:modalPanel inside a form. Every time that panel was closed (e.g usign X button on top, or OK or Cancel buttons) the form got refreshed. Actually not refreshed but I think a GET happened. I'm not sure. The effect was that, I back and forward the same form so much as I had opened the modal pannel. Or if I refreshed the page, it wanted to send form data again to the server.

2. I put modal panle outside the form, but thought that I must have a form so that buttons function. Hence I put a h:form arround the buttons. But it caused again the same behavior.

3. I put the modal panel outside of form, and there was also no form in it (arround buttons). It worked.

Integrating ActiveMQ with JBoss AS

2010-02-23T08:15:00.000-08:00

1. extract ActiveMQ.rar in deployment folder of JBoss
2. edit META-INF/ra.xml (set connector proocol (tcp or jvm), and config file (brocker-config.xml))

3. edit brocker-config.xml (add brockerName attribute, set persistance dataDir, set transport connector name attribute)
4. configure JBoss to start ActiveMQ on startup (add activmq-ds.xml to deployment directory of JBoss)
for details see:

http://activemq.apache.org/integrating-apache-activemq-with-jboss.html

integrating jobss seam manually without seam-gen

2010-02-16T01:40:00.000-08:00

Well, actually my question was:

Which dependencies do I need?
What configurations sould I make to for example web.xml or faces-context.xml

1. Which dependencies do I need?
It depends on which features are you going to have in your project. For example for a just simple porject with seam and hibernate (for beam validation) just copy all dependecies found in jboss-seam-2.2.0.GA\examples\jpa project:

first build it using ant tomcat6
then deploy the created .war file to tomcat, and after it is exploded (LoL) look at /WEB-INF/lib directory to find dependencies.

Remember that seam.2.2.0.GA might need older versions than what you may find in projects web sites. For example it needed version 3.1.0.GA of hibernate-validator.jar and could not work with the last version.

2. What configurations sould I make to for example web.xml or faces-context.xml?
look here: http://docs.jboss.com/seam/latest/reference/en-US/html/configuration.html#d0e24011

and don't forget to put an empty seam.properties file at your package root
otherwise you get continously errors on the console stating that hibernate cannot do something with transactions

JBoss EL - Passing vlues from view to bean methods

2010-01-26T04:23:00.000-08:00

add jboss-el.jar to project build path
add following configuration to web.xml

<!-- jboss el expressions allow method params -->
<context-param>
  <param-name>com.sun.faces.expressionFactory</param-name>
  <param-value>org.jboss.el.ExpressionFactoryImpl</param-value>
</context-param>

http://www.ilikespam.com/blog/el-function-parameters-with-jboss-el

Using IIPViewer in a web app

2009-12-23T05:05:00.000-08:00

1. install apache besides tomcat
2. set up apache-tomcat connector
3. set up fastcgi in apache
4. install IIPImageServer
5. test the client (javascript mootools viewer, javascript prototype viewer, flash client)
iipmooviewer had did'nt show in our facelets composite page. This might have been because of some problems of mootools framework (look at this thread http://sourceforge.net/projects/iipimage/forums/forum/299494/topic/3493189). The Flash viewer is written in ActionScript and works quite fine.

Look at following links for different possibilities for an ajax large image viewer:

Ajaxian » IIPImage: Ajax-based Ultra High Resolution Image Viewer
Panoramic JavaScript Image Viewer (PanoJS) | mojavelinux.com
Google Maps Image Viewer Module - OpenMRS

Inside Deep Zoom – Part I: Multiscale Imaging — RTFM / Daniel Gasienica
panojs - Project Hosting on Google Code
Put Your Large Pictures in Web Pages without Resizing Them – Google Maps Image Viewer
Viewing Large Images – OpenLayers, GSIV, ModestMaps, DeepZoom, and Python « Itinerant Source

A filter for RichFaces tree using javascript

2009-12-23T05:02:00.000-08:00

1. pseudocode: text box over tree, key press event calls a java script function which makes all tree nodes not containing the entered text invisible.
2. how RichFaces 3.3.2 implements a tree using TreeNodeAdapter (using tables and divs. Use DomNavigator firefox plug-in to investigate how RichFaces renders a tree).
3. using jquery and source code.

Eclipse content assist and project natures

2009-12-05T09:41:00.000-08:00

Well... I took till 4 A.M. but I found the problem.
In eclipse with JBoss Tools plug-ins installed I want to edit a .jsp page with editor of jboss tools. And the content asist do not work for ELs. For example if you have something like this


<h:outputText value="#{...}" ...

you expect the content assist to work inside the braces to show you for example your beans etc.
But it didn't work. After searching and searching, deleting the whole workspace and setting it up again, and lots of other crazy trial and errors, I realized that it is a project specific problem i.e. the content assist works in other projects.
After comparing the .project files in two projects I see the following lines are missing in my .project file in natures section:


<natures>

 ...

 <nature>org.jboss.tools.jsf.jsfnature</nature>

 ...

</natures>

Do not forget the form

2009-12-05T09:28:00.000-08:00

I think ajax-enabled html needs a form around it to work.
A typical scenario: I put a richfaces tree on the html page with the hope that when i click a node, the content of another area of page is updated (using ajax).
I looked over existing samples on richfaces demo site, and it looked not so complicated. But, as alway...IT DOESN'T WORK ;(
After a while, trying everything out and being quite upset, I changed the switchMode of the tree from "client" to "ajax" just to see what happens.
And I got an error message indicating that this poor tree cannot find its FORM
You can imagine how angry I was, when i realized that i've forgotten to put ... tags arround my page.

Mac OS X mouse acceleration

2009-10-20T04:00:00.001-07:00

Install iMouseFix
It works.

Using Interfaces instead of Inheritance

2009-10-16T09:38:00.000-07:00

The keyword is here "loose coupling". By using Interfaces we achieve loose coupling, because the consumers of an API do not dependt anymore on its implementation.

Bug me not - bypass compulsory registration

2009-10-14T07:09:00.001-07:00

Have you ever got angry, trying to download something from a famous site (e.g. sun, or ibm) and you were asked to register for free to download the stuff?
Here is the solution:
http://www.bugmenot.com/
Thank you guys, and thanks to Otto showing me this.