[GitHub] chetanmeh opened a new issue #3057: Provide a way to refer to extra jars in launch script classpath

[GitBox <gi...@apache.org>]

chetanmeh opened a new issue #3057: Provide a way to refer to extra jars in launch script classpath
URL: https://github.com/apache/incubator-openwhisk/issues/3057
 
 
   Currently the launch scripts generated for controller and invoker refer to an explicit classpath which enumerates all the existing dependencies of these modules.
   
   For certain scenarios its desirable to add custom jars to the classpath. For e.g. by default openwhisk bundles kamon-statsd but in our environment we need to use kamon-datadog. To enable that we need to include the kamon-datadog jars in controller classpath.
   
   ### Proposal
   
   To enable that launchscript can provide a wildcard pattern 'extra-libs/*'. Then in our custom image we can add extra jars to this directory which would get picked up at runtime
   
       CLASSPATH=$APP_HOME/lib/akka-slf4j_2.11-2.5.6.jar:$APP_HOME/extra-libs/*
   
   ### Possible Approach
   
   Checking in Gradle it does not appear to provide a simple way to add such custom entry. (Raised query [here][1]). So for now we can go with an approach like [here][2]
   
   [1]: https://discuss.gradle.org/t/adding-wildcard-classpath-entry-in-launch-script/25010
   [2]: http://mrhaki.blogspot.in/2015/04/gradle-goodness-alter-start-scripts.html

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