Hi, The trick is to just pass in the parts that the service needs to get whatever is you need, like you mentioned, the id.
http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/tapestry-archetype/src/main/resources/archetype-resources/src/main/java/services/RoundedCornerService.java?view=markup shows a service that does something based on a small paramter (a string, not a whole object) That service is also using an object injected from Spring (not sure that youre using Spring, but its configuration is one example of getting at external resources (like databases) rom a service.) which is configured here http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/tapestry-archetype/src/main/resources/archetype-resources/src/main/webapp/WEB-INF/hivemodule.xml?revision=533563&view=markup (at the bottom). And, finally, actually calling the service is demo'ed here: http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/tapestry-archetype/src/main/resources/archetype-resources/src/main/java/components/widgets/RoundedCorner.java?revision=533563&view=markup The whole bit about getServiceParameters() shows passing arbitrary params (in your case, imagine the id). Hope that helps some, and apologies for the late response... -- Joshua Long Sun Certified Java Programmer http://www.joshlong.com/ On 4/30/07, Norman Franke <[EMAIL PROTECTED]> wrote:
Based on the Tap4 Workbench ChartService example, I've created a similar service that fetches pictures from a database. I encountered two issues that I can't figure out: 1. The URLs generated for the picture are extremely long. I assume this is because it's serializing my page state (where the picture lives). Is there a way to have it just include the primary key of the table instead of everything client persisted on that page? (I persist the database row to implement first-write-wins updating.) 2. A more puzzling problem is if a picture can't be found (doesn't exist in the database), I want to instead send a default "no picture available" image. How do I get either a InputStream or File to this image stored in WEB-INF from the IEngineSerivce service() menthod? Thanks! Norman --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
