Hi everyone,

In hibernate standpoint, is there anyway that I can dynamically load all the class files and *.hbm.xml files during runtime from a jar file but the jar file is not included in the classpath. I know that I can dynamically load any java classes during runtime from a jar file as long as I use the appropriate ClassLoader and classloader understands where to load those classes. Is there anyway that I can pass appropriate ClassLoader into hibernate so that hibernate will load classes appropriately even though jar file is not in the class path but classloader will understand where to look for those files??

Vivian

Read the file yourself as a DOM and use the appropriate add method (addDocument from memory)

Emmanuel,


I believe Vivian is asking a different question, and I am interested in the answer, too.


Say you have some code generator (ie. Middlegen, AndroMDA + Ant etc etc) that can generate a JAR with your Hibernate classes and hbm.xmls.

Now you want to deploy that new JAR into a running environment, such as JBoss (which you probably can do some things via hot deploy) or maybe a straight JVM, and have the environment process that JAR and allow Hibernate activity to use the new classes ec.

I have a very metadata driven product that does things like generate HQL on the fly, so I will need to deploy JARs like this.


Vivian, does this outline what you want to do?

Emannuel, any suggestions?



Thanks,


Sherman

Hi everyone

Sherman - Yes, it outlined what I want.

I need to mention that I have no problem on feeding the *.hbm.xml from the jar into hibernate without any problem - that is easy. When the binder is trying to bind appropriate *.hbm.xml with appropriate *.class file - I run into problem with Hibernate. I am using a custom classloader to read those *.class files, Hibernate has no idea about the custom classloader and I need to use Thread.currentThread().setContextClassloader() in order to pass in the custom classloader for Hibernate to class load appropriate classes and I do not like that. I wish that Hibernate can have a configuration method that will take in custom classloader and actually use the custom classloader later to bind *.class with *.hbm.xml. Now I can only use Thread.currentThread().setContextClassLoader() to set classloader and I do not like this solution at all. I would like to ask if anyone has any solution for this one besides setting Thread.currentThread().setContextClassLoader()?? I know there is a method in configuration called addResource(String path, Classloader classloader) that I can use but it still does not satisfy the binding scenario because classloader is only used to retrieve *.hbm.xml file and configuration will not store classloader and use it later on binding.


Vivian

eh - why is Thread.currentThread().setContextClassLoader() bad ? that is the most correct way to fuck up...to correct classloading!?

I don't follow. Are you saying setContextClassLoader() is bad (agreeing with Vivian) or good?


Sherman

setContextClassLoader() is good (normally!)