WSO2Con 2011

Architects, Developers, IT Managers and technology enthusiasts, WSO2Con 2011, focuses on you! Newbie or seasoned professional, WSO2Con offers a great week of learning, sharing and the opportunity to connect with experts who have shaped the future enterprise. Register here

How to hide vertical grid lines in jQuery flot

There is a straight forward method to hide vertical or horizontal grid lines in your jQuery flot bar chart. First of all you need to checkout the flot trunk and include jquery.flot.js and jquery.flot.stack.js scripts in your script. You need the trunk, since released flot - 0.6 does not support this feature.

Then include the following as the options.

xaxis: {
  tickLength: 0
}

 i.e.

<script id="source">
$(function () {
    var d1 = [];
    for (var i = 0; i <= 10; i += 1)
        d1.push([i, parseInt(Math.random() * 30)]);
 
    var d2 = [];
    for (var i = 0; i <= 10; i += 1)
        d2.push([i, parseInt(Math.random() * 30)]);
 
    var d3 = [];
    for (var i = 0; i <= 10; i += 1)
        d3.push([i, parseInt(Math.random() * 30)]);
 
    var stack = 0, bars = true, lines = false, steps = false;
 
    function plotWithOptions() {
        $.plot($("#placeholder"), [ d1, d2, d3 ], {
            series: {
                stack: stack,
                lines: { show: lines, steps: steps },
                bars: { show: bars, barWidth: 0.6, align: "center" }
            },
            xaxis: { tickLength: 0}
        });
    }
 
    plotWithOptions();
});
</script>

How to list all svn externals recursively

You can use the following command to list all the svn externals in a directory structure.

svn propget svn:externals -R

How to get the transitive dependency list using Maven

You may need to find the list of transitive dependencies, so that you can exclude unnecessary dependencies. Add the following maven plugin

  <build>
      <plugins>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
         </plugin>
      </plugins>
   </build>

Use dependency:tree as the goal.

mvn clean install dependency:tree

If maven fails with some error, then, use dependency:tree as the goal with -X option.

mvn clean install dependency:tree -X

Sample:

com.hp.hpl.jena.wso2:arq:bundle:1.0.0.wso2v1
+- com.ibm.icu:icu4j:jar:3.8:compile
\- com.hp.hpl.jena:arq:jar:2.8.3:compile
   +- com.hp.hpl.jena:jena:jar:2.6.2:compile
   |  +- org.slf4j:slf4j-log4j12:jar:1.5.6:runtime
   |  \- log4j:log4j:jar:1.2.13:runtime
   +- com.hp.hpl.jena:iri:jar:0.8:compile
   +- org.codehaus.woodstox:wstx-asl:jar:3.2.9:compile
   |  \- stax:stax-api:jar:1.0.1:compile
   +- org.apache.lucene:lucene-core:jar:2.3.1:compile
   +- junit:junit:jar:3.8.1:compile (version managed from 4.5)
   +- org.slf4j:slf4j-api:jar:1.5.8:compile
   \- xerces:xercesImpl:jar:2.7.1:compile
------------------------------------------------------------------------

How to Deploy WSO2 BPS on JBoss

This article from Pavithra provides step by step directions to deploy WSO2 BPS 2.0.2 in JBoss 5.1.0 GA.
WSO2 BPS can also be installed on other application servers as well. Refer Oxygen Tank for more information.

Orchestration vs Choreography

Service orchestration and service choreography are widely spoken topics when it comes to service composition. Lets take a look at the definitions.

Orchestration

Analogy: Orchestra

The conductor of the orchestra is the one who knows the entire composition. The musicians in the orchestra do not necessarily have to know what other musicians part or what they do. The musicians just have to know how play their instrument in which they best at. The conductor orchestrate the group of musicians to achieve the final output (composition).

Orchestration is the coordination of web services in order to compose the business processes. The business process plays the role of orchestrator/conductor and coordinate the services to fulfill the business process. The individual web services do not aware (it is not necessarily need to know) of the other services involved in the process and the services even do not know that they participate in a business process, they just serve the requests. WS-BPEL specification is an example. WS-BPEL is a language for defining processes that can be executed on an orchestration engine such as WSO2 BPS.

Choreography

Analogy: Group Dance

Each and every dancer know, exactly what to do and what other dances will do. They synchronize them selves according to the other dances.  The dancers aware of the each others moves.

Therefore, in choreography, services do not rely on a central coordinator. Each of the service, knows exactly when to execute them selves and when to talk to its peers and sync up. WS-CDL standard is an example.

References: http://www.infoq.com/news/2008/09/Orchestration

WSO2Con 2010

WSO2 celebrates 5th year anniversary with WSO2Con 2010.

The conference will feature some of WSO2’s most renowned technical thought leaders. Topics range from Platform-as-a-Service (PaaS) and On-Premise Cloud Systems, Enterprise Security, Governance, and Managing Business Processes.

Most importantly, there will be a demo of an end to end business scenario which is powered by WSO2 product stack.

Still not too late. Register for WSO2Con 2010.