OSGi Console Services and Filter

In the Equinox OSGi Console with the command services all running services will be listed. When you like to filter you can use the OSGi Filter Syntax. The filter I use often is services (objectClass=com.github.tux2323*) then all services which starts with the Java package com.github.tux2323 will be listed.

Example:

osgi> services (objectClass=com.github.tux2323*)
{com.github.tux2323.demo.chat.server.ChatServer}={service.id=26}
  Registered by bundle: com.github.tux2323.demo.chat.server_1.0.0.qualifier [1]
  No bundles using service.

A nice german article from Heiko Seeberger about OSGi filter can be found here.

My first op4j code

I play around with op4j makes a lot of fun. Here my first op4j code:

// Create a array with out null and 0 values
Integer[] integers = Op.onArrayFor(1, 2, 3, null, 4, null, 0).removeAllNull().removeAllEqual(0).get();
  
// Assert
for (Integer value : integers) {
   assertNotNull(value);
   assertNotSame(0, value);
}

Link:

• www.op4j.org/
• http://martinfowler.com/bliki/FluentInterface.html

UML Talk Infos and Links

Here some Infos around my german UML "Einführung in die UML" talk. More details about SDC see http://www.seitenbau.com/sdc/.

Here my slides:

2010 - Einführung in die UML - Seitenbau Developer Convention

View more presentations from tux2323.

Here some Links to the topics from the talk:

• http://yuml.me/
• http://www.umlgraph.org/
• http://www.umlet.com/
• http://domaindrivendesign.org/
• http://maven-plugins.sourceforge.net/maven-dotuml-plugin/
• http://maven.apache.org/plugins/maven-javadoc-plugin/examples/alternate-doclet.html
• http://sourceforge.net/apps/mediawiki/textuml/index.php?title=TextUML_Toolkit
• http://plantuml.sourceforge.net/classes.html
• http://www.eclipse.org/modeling/mdt/?project=uml2
• http://www.vogella.de/articles/UML/article.html
• http://www.powerpointsgratis.net/UML/1/
• http://de.wikipedia.org/wiki/Class-Responsibility-Collaboration-Karten
• http://wiki.eclipse.org/Graphviz_DOT_as_a_DSL_for_Zest

jSonde – Generate a UML Sequence Diagram

The eclipse TPTP profiler has a very cool feature, create a UML sequence diagram from a profiling session. But the problem the TPTP profiling agent doesn’t run on my MacBook. So I looked for other free tools and I found jSonde an open source Java profiler (GPL).

jSonde can be used to generate a UML sequence diagram from a java application by profiling the app e.g. this can be used to document the actual implementation of a use case. How a this can be done, I will show step by step here in this post:

Step 1.) Get jSonde from http://www.jsonde.com/

Step 2.) Create a JUnit test case for the use case / function which you want to document, or when you do TDD look for an existing test...

Here the example code of my test:

@Test
 public void testPurchase() {

  Seller sellerOne = kasse.getSeller(100);
  Seller sellerTwo = kasse.getSeller(101);

  Position hose = new Position();
  hose.setDescription("Hose");
  hose.setPrice(2150);
  hose.setSeller(sellerOne);

  Position kleid = new Position();
  kleid.setDescription("Kleid");
  kleid.setPrice(2150);
  kleid.setSeller(sellerTwo);

  Sale sale = new Sale();
  sale.addPosition(hose);
  sale.addPosition(kleid);

  kasse.purchase(sale);  

}

Step 3.) Run the test e.g. in eclipse (or in other IDE) with the follow VM parameter: “-javaagent${JSONE_PATH}/lib/jsonde.agent-1.0.0.beta7.jar=60001”

Step 4.) Start jSonde and click File -> New Project

Step 5.) Enter a project name and the namespace of the application then click Connect

Step 6.) After the test is pass, click sequence diagram and select the test method in the tree view

Here the full UML sequence diagram for the "Purchase" test implementation:

Links:

• http://www.jsonde.com/
• http://www.eclipse.org/tptp/
  

TwiP JUnit Test with more then one Parameter

Here a example, how a JUnit test which use TwiP, can use more then one test parameter.



See also my previous contribution on TwiP here.

Links:

• http://twip.sourceforge.net/