I am creating a custom plugin which has references to 3rd party jars like xmlbe

sivananthag over 9 years ago

I am creating a custom plugin which has references to 3rd party jars like xmlbeans, asis-axiom jars etc., I created a plugin project and then created a smart service.
I checked some sample plugins in the forum that has 3rd party dependencies ( for example Base64 Conversion Utilities - has dependency on castor). They just place the 3rd party jars under META-INF / lib and has a plain manifest file that contains only Manifest Version attribute.
I followed the same approach and placed my dependent jars in the META-INF/lib folder and there is a Manifest.MF file under META-INF with just version property.
I deployed this plugin jar , but it didnt work. I got NoClassDefFound Exception always.

I tried adding my depdendency jars in "ClassPath" attribute in Manifest.MF and my manifest now looked like:
Manifest-Version: 1.0
Main-Class:
Class-Path: schemaorg_apache_xmlbeans.jar apache-mime4j-core-0.7.2.jar axiom-api-1.2.13.jar axiom-dom-1.2.13.jar axiom-impl-1.2.1...

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0 sivananthag over 9 years ago

I can not post my custom plugin in forum. I am using Appian's Eclipse plugin and the Appian-> Export bundle option to build the jar. I tried various options of building Jar - through Java Export ( manual assembly of jar), appian -> Export Plugin, Appian build.xml etc., . I could not find any difference in structure and content in any of the jar building approach. the dependent jars are placed in META-INF/ lib and manifest.mf file didnt have any special attributes, it is just Manifest-Version & Created-By attributes. So I am not sure why classes from my libraries are not getting loaded?
Please suggest me if i am missing any steps / how to get the libraries loaded?
Also appreciate your help on throwing some light on Appian Class loading mechanism for Smart services. I could not get any article on this in Appian documentation.

thanks,
Jhothi
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0 sivananthag over 9 years ago

I can not post my custom plugin in forum. I am using Appian's Eclipse plugin and the Appian-> Export bundle option to build the jar. I tried various options of building Jar - through Java Export ( manual assembly of jar), appian -> Export Plugin, Appian build.xml etc., . I could not find any difference in structure and content in any of the jar building approach. the dependent jars are placed in META-INF/ lib and manifest.mf file didnt have any special attributes, it is just Manifest-Version & Created-By attributes. So I am not sure why classes from my libraries are not getting loaded?
Please suggest me if i am missing any steps / how to get the libraries loaded?
Also appreciate your help on throwing some light on Appian Class loading mechanism for Smart services. I could not get any article on this in Appian documentation.

thanks,
Jhothi
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Vote Up 0 Vote Down

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