Ok, following the instructions at the end of the page pointed to by the link below I could solve this issue :) cheers, janos
2008/5/6 János Jarecsni <[EMAIL PROTECTED]>: > Hi all, > > I've found an answer to this from Howard ( > http://article.gmane.org/gmane.comp.java.tapestry.user/53987 ). He says: " > *Basically, you shouldn't mix component classes with services classes. > When you do so, you need to define an interface for your components to > implement.*" > > Here's what I did: > 1) I set up a service called AdminDataSource which is a simple DAO with a > DB4O implementation to store management objects for components. > > 2) Defined a ComponentConfiguration interface which is a marker interface > for classes to be used as component configuration > > 3) in my base class for components (AbstractComponent) I introduced > methods to save and load the configuration (they delegate to the injected > service, AdminDataSource to get the work done). > > I think this is a rather common scenario, that a component uses a service. > How could I have avoided this? By instantiating an AdminDataSource for the > component (no service involved)? > > thx in advance, > janos > > 2008/5/5 János Jarecsni <[EMAIL PROTECTED]>: > > Hi guys, > > > > I get this: > > > > loader constraint violation: when resolving interface method > > "com.foo.services.AdminDataSource.getConfiguration(Lcom/foo/base/Component;)Lcom/foo/services/ComponentConfiguration;" > > the class loader (instance of > > org/apache/tapestry/internal/services/ComponentInstantiatorSourceImpl$PackageAwareLoader) > > of the current class, com/foo/base/AbstractComponent, and the class loader > > (instance of org/apache/catalina/loader/WebappClassLoader) for resolved > > class, com/foo/services/AdminDataSource, have different Class objects for > > the type com/foo/base/Component used in the signature > > > > What I can see from this, is two different class loaders load some > > classes. What I have is a component class trying to use a service of mine. > > What am I doing wrong? :) > > > > Thx in advance! > > Cheers > > janos > > > >
