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https://issues.apache.org/jira/browse/JAMES-2886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932044#comment-16932044
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Tellier Benoit commented on JAMES-2886:
---------------------------------------
This issue can be solved by packaging things in a jar-with-dependencies as
demonstrated in https://github.com/linagora/james-project/pull/2695
> Unable to usetransitive dependencies at runtime in Guice extension jars
> -----------------------------------------------------------------------
>
> Key: JAMES-2886
> URL: https://issues.apache.org/jira/browse/JAMES-2886
> Project: James Server
> Issue Type: Bug
> Components: guice, Matchers/Mailets (bundled)
> Affects Versions: 3.4.0
> Reporter: Tellier Benoit
> Priority: Major
>
> As reported by @AaronRegan , we are unable to resolve transitive dependencies
> in extension jars.
> # Steps to reproduce
> Given a maven module containing a custom mailet, instanciating objects as
> part of the *service* method that are NOT part of James classpath:
> - 1. Start *any* James guice application
> - 2. Drop the JAR of the aforementioned in extension-jars folder
> - 3. Configure the mailet within the mailet pipeline
> - 4. Process a mail and....
> - 5. Notice runtime failures! The service method does not succeed to
> instanciate the object not being part of James classpath.
> As off commit 42d7d55d5380d13648533160844d30f765a2c6f1, such a JAR could very
> well be the *apache-mailet-crypto* JAR.
> This would result in :
> {code:java}
> java.lang.ClassNotFoundException:
> org.bouncycastle.mail.smime.SMIMESignedGenerator
> at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> ... 82 common frames omitted
> Wrapped by: java.lang.NoClassDefFoundError:
> org/bouncycastle/mail/smime/SMIMESignedGenerator
> at
> org.apache.james.transport.SMIMEKeyHolder.createGenerator(SMIMEKeyHolder.java:208)
> at org.apache.james.transport.SMIMEKeyHolder.generate(SMIMEKeyHolder.java:251)
> at
> org.apache.james.transport.mailets.AbstractSign.service(AbstractSign.java:486)
> at
> org.apache.james.mailetcontainer.impl.camel.CamelProcessor.process(CamelProcessor.java:81)
> at
> org.apache.james.mailetcontainer.impl.camel.CamelMailetProcessor$MailetContainerRouteBuilder.handleMailet(CamelMailetProcessor.java:178)
> at
> org.apache.james.mailetcontainer.impl.camel.CamelMailetProcessor$MailetContainerRouteBuilder.lambda$configure$0(CamelMailetProcessor.java:155)
> at
> org.apache.camel.processor.DelegateSyncProcessor.process(DelegateSyncProcessor.java:63)
> ... 75 common frames omitted
> {code}
> # What to do from here
> - Write a test reproducing that behavior...
> - Bundle *apache-mailet-crypto* within supported guice app mailets
> - Fix that annoying transitive dependency issue - this is in my opinion a
> blocker for Guice adoption.
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