[FTPSERVER-441] Impossibile to create Custom UserManager in OSGI container

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.0.6
• Component/s: Core
• Labels: OSGI
• Environment: Karaf OSGI platform, with FtpServer-core bundle Ver 1.06 + My bundle that create new FtpServer
• Assignee: Unassigned
• Reporter: Marco Bianicni
• Created: 19/Jun/13 17:10
• Updated: 20/Jun/13 07:37

Description

I need to create an FTPServer with custom SslConfiguration and custom UserManager from my OSGI Bundle.
When i create MyUserManager i obtain the following runtime error:

java.lang.LinkageError: loader constraint violation: when resolving method "org.apache.ftpserver.FtpServerFactory.setUserManager(Lorg/apache/ftpserver/ftplet/UserManager;)V" the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, com/sample/Activator, and the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) for resolved class, org/apache/ftpserver/FtpServerFactory, have different Class objects for the type rver.FtpServerFactory.setUserManager(Lorg/apache/ftpserver/ftplet/UserManager;)V used in the signature

This error is caused because FtpServer-core bundle has org.apache.ftpserver.ftplet package but this package is not exported by Manifest, and this mvn projects depends from ftplet-api bundle.
MyUserManager uses UserManager exported by ftplet-api.

There are 2 solutions for this:

• add import of org.apache.ftpserver.ftplet;version=1.0.6 and remove this package from bundle.
• export org.apache.ftpserver.ftplet and remove compile dependency from maven pom

Issue Links

• blocks: FTPSERVER-425 Duplicate package org.apache.ftpserver.ftplet in ftpserver-core