On 04/01/2011 07:40 PM, Kris Hayden wrote:
hello. i have been coding an application by hand and have been having a hard time getting the derby.jar file to be loaded from inside my jar
Do you literally mean a jar-within-a-jar, not a jar-within-a-war and not a jar-within-a-ear? I don't think that the basic JDK jar loading utilities are capable of resolving class references to a jar within a jar; that sort of fancy class loading is generally done by the application class loaders found in application servers. The mechanism of having your manifest refer to a separate jar file is the only way I know of for the basic JDK jar loader to affect the class path. If you want to package everything as a single jar, you could try un-jarring all the Derby code into simple .class files and then re-packaging it into a single jar with no internal structure, just all .class files within the jar. But really, this is a lot of work; I think it would be easier to keep the Derby jars separate, in their existing jar files, and re-design your application strategy to allow for multiple jar files in the overall packaging. For one thing, the Derby security policy implementation assumes that the Derby jars are left as is, not re-packaged. Can you describe some of the reasons that you want to repackage Derby? thanks, bryan