On Mon, Nov 30, 2009 at 11:58 AM, Jim O'Callaghan <jc1000...@yahoo.co.uk> wrote: > That worked thanks Howard. I had previously unsuccessfully tried moving the > implementation classes out of the base package, but hadn't moved the > interfaces. > > P.S. I'm starting a medium size application from scratch using Tapestry 5, > having evaluated quite a few other frameworks and must say I am very > impressed so far with the framework - it's one of the most easy to use and > well-featured I've seen, outside of in-house affairs which use mainly > non-transferable knowledge. Thanks for all the effort you and your team > have put in to it. >
That's great to hear ... Tapestry needs all the marketing support it can get, so blogging about your discoveries and successes with Tapestry is very useful to the overall community as well. Tapestry needs more people talking about it! > Regards, > Jim. > > -----Original Message----- > From: Howard Lewis Ship [mailto:hls...@gmail.com] > Sent: 30 November 2009 18:31 > To: Tapestry users > Subject: Re: Stumped with Linkage Errors > > > base is a special package, it should only contain base classes for > Tapestry components, pages and mixins. Move IPersistentObjectRef to > some other package. > > http://tapestry.apache.org/tapestry5.1/guide/component-classes.html > > On Mon, Nov 30, 2009 at 10:11 AM, Jim O'Callaghan <jc1000...@yahoo.co.uk> > wrote: >> Hello, >> >> I'm having a linkage issue that is proving time consuming to track down > and >> am hoping some of the bright sparks here may be able to give me some >> pointers - this may turn out to be something blindingly obvious, or to be >> not relevant to Tapestry but some java issue I haven't spotted - I would > be >> grateful for any observations / ideas. The issue is: >> >> [ERROR] TapestryModule.RequestExceptionHandler Processing of request > failed >> with uncaught exception: loader constraints violated when linking >> com/x/y/base/IPersistentObjectRef class >> java.lang.LinkageError: loader constraints violated when linking >> x/y/z/base/IPersistentObjectRef class >> >> ... when run against java 1.5x and when run against java 1.6x I get a > little >> more info: >> >> [ERROR] TapestryModule.RequestExceptionHandler Processing of request > failed >> with uncaught exception: loader constraint violation: when resolving >> interface method >> > "com.x.y.services.MenuEntityManager.getExistingEntity(Lcom/x/y/base/IPersist >> entObjectRef;)Lcom/x/y/entities/menu/Menu;" the class loader (instance of >> > org/apache/tapestry5/internal/services/ComponentInstantiatorSourceImpl$Packa >> geAwareLoader) of the current class, com/x/y/pages/menu/MenuSearchResults, >> and the class loader (instance of runjettyrun/ProjectClassLoader) for >> resolved class, com/x/y/services/MenuEntityManager, have different Class >> objects for the type com/x/y/base/IPersistentObjectRef used in the > signature >> java.lang.LinkageError: loader constraint violation: when resolving >> interface method >> > "com.x.y.services.MenuEntityManager.getExistingEntity(Lcom/x/y/base/IPersist >> entObjectRef;)Lcom/x/y/entities/menu/Menu;" the class loader (instance of >> > org/apache/tapestry5/internal/services/ComponentInstantiatorSourceImpl$Packa >> geAwareLoader) of the current class, com/x/y/pages/menu/MenuSearchResults, >> and the class loader (instance of runjettyrun/ProjectClassLoader) for >> resolved class, com/x/y/services/MenuEntityManager, have different Class >> objects for the type com/x/y/base/IPersistentObjectRef used in the > signature >> >> >> I'm using Tapestry 5.1.0.5 under maven 1.6 Jetty plugin and java 1.5 / 1.6 >> (for testing). >> >> The package hierarchy is: >> >> com.x.y.abstractclasses >> SuperClass A for persistent classes (contains embeddedID for > Hibernate, >> PersistentObjectRef p) >> >> com.x.y.base >> PersistentObjectRef >> IPersistentObjectRef >> >> com.x.y.entities >> EntityB extends SuperClass A >> >> com.x.y.pages >> SearchResults >> EditEntity >> >> com.x.y.services >> EntityBManager (search, add, edit methods) >> >> com.x.y.services.impl >> EntityBManagerImpl >> >> The following steps are the sequence of execution: >> >> 1) calling a method within my 'SearchResults' page via >> '@OnEvent(component="detailsLink")' from search results grid component >> >> 2) reference String from grid component ActionLink is used to > create a new >> PersistentObjectRef >> >> 3) PersistentObjectRef is then passed into my EntityBManager > service to >> locate relevant Entity >> >> 4) Relevant Entity is set in subsequent detail Page which is then > returned >> to user >> >> >> The failure is at step two, where the PersistentObjectRef is created, > before >> being sent into the service method. I've tried moving the >> PersistentObjectRef to the abstractclasses package, in case Tapestry is >> decorating it and causing an issue, but with no success. The hashcode and >> equals methods for the PersistentObjectRef are pretty ordinary, based on a >> composite key that is used as a common embedded id for a number of > entities. >> It is serializable. >> >> I can't figure out why the runjettyrun/ProjectClassLoader has a different >> version of the class than the >> > org/apache/tapestry5/internal/services/ComponentInstantiatorSourceImpl$Packa >> geAwareLoader - I've tried using passing around both the concrete class > and >> the interface without success. The class is a class that is internal to > the >> project and no other versions of the class are available on the classpath, >> or contained in jarred up resources. >> >> If there is any other relevant information I can provide please let me > know. >> I can workaround by de/reconstructing keys etc. but think this is > something >> fundamental I am missing and will probably pop up again. >> >> Regards, >> Jim. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >> For additional commands, e-mail: users-h...@tapestry.apache.org >> >> > > > > -- > Howard M. Lewis Ship > > Creator of Apache Tapestry > > The source for Tapestry training, mentoring and support. Contact me to > learn how I can get you up and productive in Tapestry fast! > > (971) 678-5210 > http://howardlewisship.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > -- Howard M. Lewis Ship Creator of Apache Tapestry The source for Tapestry training, mentoring and support. Contact me to learn how I can get you up and productive in Tapestry fast! (971) 678-5210 http://howardlewisship.com --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
