First screen-cast : Mooshabaya

This simple screen-cast demonstrates the basic functionality of Mooshabaya , which is mashup generation via Mooshabaya to WSO2 Mashup server. There are some other basic functionalities like WSO2 Governance Registry integration and event monitoring for mashup script execution which are not demonstrated in here. We will publish more explanatory ones once we get the project more towards the completion.

MoFilm : Learn to Learn : UoM

Learning is something, students do, not something done to students. This mobile movie is directed and produced by a team of students from 06 batch-Faculty of Engineering, University of Moratuwa.
The project is an outcome of my digital video production course coordinated by Department of Computer Science and Engineering. Other team members are displayed at the end of this clip.

Project Proposal-Association Rule Mining with Extended Vertical Format Data Mining

The goal of this research is to propose a better alternative to Apriori algorithm, and proving the efficiency enhancement by using a dataset. With the benchmarks of the datasets, the proposed algorithm will be tested along with the test parameters got from the Apriori Algorithm. The improvements on the performance and efficiency will be published based on the data gathered by the testing for the itemsets.

University of Moratuwa on top of the world in GSoC

The University of Moratuwa (UoM), Sri Lanka became the top of the world in Google Summer of Code 2009 with 22 students accepted for the second consecutive year.
Google Summer of Code (GSoC) is a global program in which Google awards stipends to hundreds of students who successfully complete a requested free software / open-source coding project during the summer.
Congratulations for all the UoM GSoCers for raising the UoM flag up once again.
I'm very proud to be among the top Sri Lankan GSoC 2009 winners, together with my colleagues from the Computer Science and Engineering Department from University of Moratuwa.
This is because the Computer Science and Engineering department of University of Moratuwa promotes the students to participate to this competition. Especially the open source software organizations like WSO2 Inc. and Lanka Software Foundation promote and guide students on applying for GSOC. Though there is very few open source software organizations located in Sri Lanka, the contribution they have made with the participation of University of Moratuwa towards this remarkable success is marvelous.
Finally I congratulate all the Sri Lankan students who were accepted and completed their GSoC projects for last 4 years and made this small island, Sri Lanka into a rising star.

For more Details Google Open source blog.

Related blog post - My first hands on experiences on Google Summer of Code

Confession for the last three years at university

I passed O/L in 2002. Then A/L in 2005. Came to University of Moratuwa in 2006.
Since then, I lived on my own and I had only one ambition. It was "to do what I love, and to love what I do". And still it's same as it is. :)
Spent 1st year on studying different engineering aspects and engineering mathematics. Decided to specialize on Computer Science and Engineering field. Then spent 2nd and 3rd years at the Computer Science and Engineering department.
Then in the 2nd semester of the 3rd year we went for the industrial training. I chose WSO2 Inc. as the training place. And then I was selected to Google Summer of Code 2009.
After 10 months industrial training period we had 2 months vacation (not really :)).
So after one year of a non-academic period, the dawn of the next week is the start of the 4th academic year.
Last three years at university were awesome, and the 3rd year was AWESOME. 3rd year internship period was filled with life changing experiences. All of my colleagues would agree with me on it. As well all of us may remember how we worked hard when exams came near. :)
I became a huge fan of European, Hollywood and Sinhala movies and learned some stuffs on cinematography and still photography last year. No matter how much work I have on my back, I spend hours and hours on watching movies.

Anyway 43.5 credits to be earned and the Final year project to be completed in the next year and I'll be the same old me.
 

Writing a simple WS-BPEL process for WSO2-BPS and Apache ODE

I've written an article on The WSO2 OxygenTank explaining the fundamentals on writing and deploying a simple BPEL which interacts with several partner services, in WSO2 BPS and Apache ODE.
So this article focuses on the basic functionalities such as: how to invoke partner services from a BPEL process, how to wait for a message from a client who invokes a BPEL process etc. A sample BPEL process called "FunctionProcess" is also attached to the article, with required sample partner services. All examples are based on the attached sample code.

The article flows based on the following topics.

• What is a business process?
• What's BPEL?
• Basic terms used in the BPEL terminology
• How to deploy sample partner services and the BPEL process
• How to establish a partner link with a Web service
• How to invoke the BPEL process from a client
• How to invoke a partner Web service from the BPEL process
• How to reply to the client from the BPEL process
• How to do basic variable manipulation in a BPEL process
• How to Deploy and test the BPEL process

The project Mooshabaya (මූෂාභය) - Brings the knowledge from workflow domain to Mashup domain

The idea for the project "Mooshabaya" was emergerged as a final year project, coordinated by the department of Computer Science and Engineering, University of Moratuwa.
The project "Mooshabaya" targets to generate Mashups to describe the composed workflows, by modifying XBaya Workflow Composer.
XBaya addresses the above mentioned issue regarding to the modeling of workflows based on web services. It is a graphical client program for workflow composition and monitoring. It provides an easy-to-use GUI for users to compose workflows from Web Services described in WSDL. It helps the developer to build a graphical representation of the workflow. To facilitate the execution phase of the workflow XBaya also enables the developer to insert the concrete deployment details such as end point URLs present in WSDLs to the workflow model metadata as well. To actually make it executable in real world this workflow model has to be converted in to an executable format which can be deployed within an existing workflow execution engine. BPEL is such executable workflow language which can be run inside a WS-BPEL compliant workflow engine. BPEL has been standardized by OASIS standard body. Currently conversion to BPEL from the XBaya workflow model is present where the converted workflow can be deployed in BPEL engines such Apache ODE.
XBaya currently exports the composed workflows into BPEL and Jython. Though Mooshabaya focuses and uses XBaya as its workflow composer, it can easily be generalized to be compatible to any other workflow composer. Mooshabaya will find the services from a service Registry, which governs SOA deployments, and the composed workflows are deployed into a Mashup Server as mashups.

Let's take a look at on what a mashup is. A mashup is a web application that combines data or functionality from two or more sources to create a new service. It enables fast and easy integration of services and data sources using open API s. This enables the realization of workflows in yet another format and which seems to be very promising due to the proliferation of web services and mashup enabled services on the Internet, a classical example being highly popular Google Maps. Currently there is no mechanism to export XBaya workflow models to mashups which we feel is a significant shortcoming. So we intend to fill this void by extending the XBaya export mechanism to include mashup exports. Also to facilitate monitoring of the workflow during its execution we intend to introduce event notification facility in the generated mashup codes.

How a simple mashup looks like.
Here is a simple mashup that will invoke a partner service "AdderService" and return the result inside "invokeFunctionProcessService" operation.

/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
this.serviceName = "FunctionProcess";this.documentation = "Invoke AdderService" ;
system.include("AdderService.js");

invokeFunctionProcessService.inputTypes={"param0" : "Number", "param1" : "Number"};
invokeFunctionProcessService.outputTypes="Number";

function invokeFunctionProcessService(param0, param1)
{
var adderServiceResponse = AdderService.add(param0, param1);
return adderServiceResponse;
}

So this approach enables to create workflows and business process (like BPEL processes) using in simple javascript.

Things to be figured out - Still, we do not have a clear image on how the mashup domain and the mashup technologies would fit in to the existing workflow domain. So still we are not sure about the actual functional requirements of this project.
We are still in the initial stage of this project. So in future we'll bring you more information in a more official way.

Link - http://mooshabaya.sourceforge.net/
IRC channel - ##m2sc on freenode


Project Members - De Alwis, K.D.B.C.
Malinga, A.S.
Pradeeban, K.
Weerasiri, W.A.D.D.

External Mentors - Dr. Srinath Perera
Dr. Sanjiva Weerawarana
Internal Mentors - Mrs. Vishaka Nanayakkara