JZ08

Exception handling

Se foredrag her.

Type	Handle	Fix and update app	Try again?
Application Exception	Possible	No	No
System Exception	No	No	Possible
Programming Exception	No	yes	No

Rammeverk: distribuert Exceptionhierarki (mange klasser)
Applikasjon: sentralisert Exceptionhierarki (1 klasse med felt for id og map for kontekstuell info).

Google App Engine

Java on App Engine
See App Engine Java Overview.

SDK (ref Google):
I downloaded the SDK, unzipped it and added to my PATH.
I used Ant to build the app in demos\guestbook
I then ran the local test-server with command (path from demos dir):
dev_appserver.cmd guestbook\war

I must wait for activation before I can upload app

Dashboard.

Groovy on App Engine
I impported the code for the Groovy AppEngine HelloWorld, but that does not run locally due to a bug in the SDK. I commented out the line that tries GroovyShell().evaluate("3*4"), and it ran, but it seems that Groovlets are based on being able to evaluate scripts.

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