Adding a Custom Exception


	Table of Contents Adding the Exception Edit the Service to Throw the Exception Edit the Client to Cause the Exception Re-Deploy Re-Start the Service Container Invoke

Adding the Exception

In Introduce with the Modify Service Interface window open for the tutorial service, click the Operations tab.
Select the findGenesSharePathways method in the Operations table.
Click the Modify button.
When the Build/Modify Operation dialog appears select the Faults tab.
At the bottom of the panel there is a text box for creating a new fault type. Enter the fault name NoSharedPathwayGenesFound
Click the Add New Fault. You will see the new fault was created and added to the table in the upper right.
Click the Done button.
Click the Save button. (this make take a few minutes in order to modify and regenerate the service skeleton)

Open for editing the file C:\CaGridTutorialService\src\gov\nih\nci\cagrid\tutorial\service\CaGridTutorialServiceImpl.java. You should see in the findGenesSharePathway method that it now throws the new exception NoSharedPathwayGenesFound. We will now modify the service to use the exception.

After the line

java.util.List rList = appService.query(
					new gov.nih.nci.common.util.HQLCriteria(hql),
					gov.nih.nci.cabio.domain.Gene.class.getName());

Add

if (rList == null || rList.size() <= 0) {
				throw new gov.nih.nci.cagrid.tutorial.stubs.types.NoSharedPathwayGenesFound();
			}

Open for editing the file C:\CaGridTutorialService\src\gov\nih\nci\cagrid\tutorial\client\CaGridTutorialServiceClient.java
In the main method replace the "BRCA1" text with "I Love CaGrid". This will cause our service to throw the new exception because no gene exists with that symbol.
Save the modified file.

Click the Deploy Service button at the top of the Introduce portal. Using the file selection dialog, browse to the root directory of your newly created data service ( C:\CaGridTutorialService ). When the service deployment dialog appears, set the Deployment Location to GLOBUS_LOCATION using the drop down provided.

Deployment Properties

* Click the Deploy button to deploy the data service to the Globus Location.

Using a new command prompt, change to the Globus location directory and start up Globus. (If globus is already running, be sure to terminate it before you proceed with starting another one.)

%> cd %GLOBUS_LOCATION%\bin
%> globus-start-container.bat -containerDesc ..\..\certificates\security-descriptor.xml

At the command prompt, change to the data service root directory and run the ant task to launch the client.

The client should throw an exception of the type gov.nih.nci.cagrid.tutorial.stubs.types.NoSharedPathwayGenesFound