GTLAB Overview

Installing and Building GTLAB

GTLAB and OGCE
OGCE contains multiple sub-projects
Portlet-based Grid portal (with Gridsphere and Tomcat).
Workflow suite (services and add-ins to the portal)
Information Web services
Gadget container
JavaScript libraries
GTLAB
These are packaged with Maven and include everything you need except Java and (for some services) MySQL.
We try to make things installable with minimal fuss.
Edit one config file (pom.xml)
Run one command (mvn clean install)
You may need to futz a little with MySQL

Getting GTLAB
See http://www.collab-ogce.org/ogce/index.php/GTLAB
You can use your favorite SVN client to check out.
svn co https://ogce.svn.sourceforge.net/svnroot/ogce/GTLAB (latest)
svn co https://ogce.svn.sourceforge.net/svnroot/ogce/tags/GTLAB-release-SC08-1.1 (tagged)
The tagged represents a stable preview release. The latest is whatever was checked in last.
“ Latest” will also give you easy access to any updates
“ svn update”
Best option if you want to actively develop and get fixes right away.

No SVN? Get the TAR
SourceForge’s SVN/CVS viewer now provides a “Download GNU Tar” option.
http://ogce.svn.sourceforge.net/viewvc/ogce/GTLAB/ for latest.
http://ogce.svn.sourceforge.net/viewvc/ogce/tags/GTLAB-release-SC08-1.1/ for tag

What’s in GTLAB?

Build GTLAB
Unpack or checkout code
Cd GTLAB
All commands are executed from here.
Edit properties at the top of pom.xml.
Change IP
Change project.home if you unpack someplace besides $HOME.
Run “mvn clean install”
<properties> <portal.server.ip> 156.56.104.143 </portal.server.ip> <host.base.url> http://${portal.server.ip}:8080/ </host.base.url> <project.home> ${env.HOME}/GTLAB </project.home> <tomcat.version> apache-tomcat-5.5.27 </tomcat.version> <catalina.home> ${project.home}/portal_deploy/${tomcat.version}/ </catalina.home> <dot.globus.home> ${env.HOME}/.globus/ </dot.globus.home> </properties>

Run Examples
From GTLAB, start tomcat with ./startup.sh.
From GTLAB, stop Tomcat with ./shutdown.sh
Point browser to http://localhost:8080/GTLAB
Start with MyProxy Example

Next Steps
Play with examples.
These are really bare bones. Make something interesting.
Make a Google gadget.
Mix and match tags in a pipeline to make a new application.
Use the dependency tag.
Note you can mix and match JSF and JSP if you are not familiar with JSF.
Try making a new tag.
Explained next.

Making a New JSF Page from Tags
I recommend starting from the examples.
jsf_standalone/src/main/webapp/examples
“ Build” the examples with
mvn –o clean install –f jsf_standalone/pom.xml
The “-o” option is used to build offline. Will also avoid unnecessary Maven repository updates.
The “-f” specifies only build this specific module.
I recommend not futzing with the deployed versions under portal_deploy.
A computer is a state machine. State must be reproducible.

Making a New Tag
Run the following command from GTLAB:
mvn clean process-resources -Dtag.name=test -Dprojectname=Test -f templateTag/pom.xml
Add -Ddest.dir=/tmp for a dry run.
Replace “test” with the name of your tag.
Replace “Test” with the name for your Bean.
This will make 4 files
TestBean.java , TestTag.java, TestBeanFactory.java , UITest.java
Edits also 3 config files
gtlab-factory.xml, managed-beans.xml , components.xml
This will compile but to implement something useful, you will need to edit the highlighted files.

Implementing a Tag
The place to start is TestBean.java (or whatever you used for –Dprojectname=…).
This includes several inherited methods that can be implemented.
Most important is submit() . Use the try/catch block. This is where the action is.
If you need to hook tags into chains, implement getOutput() and setInput() .
Also take a look at the other beans.

What Can You Implement as a Tag?
What can you do in your bean? Anything server-side Java can do.
Some suggestions:
Implement a tag client to a remote Web service. Amazon has some interesting ones….
Implement an RSS/Atom feed client to Twitter, your blog, Facebook, etc.
Combine the feeds as a mash-up.
Connect to a database with JDBC.
Implement a JMS publisher or subscriber.
Use Google Java APIs to interact with Blogger, Calendar, and YouTube.
Try interacting with Facebook.

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GTLAB Overview

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GTLAB Overview

by marpierc

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