[jboss-jira] [JBoss JIRA] Created: (JBCACHE-1300) Standardize mechanism for setting defaultClassLoader

[Brian Stansberry (JIRA)]

Standardize mechanism for setting defaultClassLoader
----------------------------------------------------

                 Key: JBCACHE-1300
                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1300
             Project: JBoss Cache
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
            Reporter: Brian Stansberry
         Assigned To: Manik Surtani
            Priority: Minor


Right now the default classloader used by the cache's marshaller is fixed to CacheImpl.class.getClassLoader(), with no clear mechanism for users to change that.

In the Hibernate/JBC testsuite I did the following:

public class CustomClassLoaderCacheFactory<K, V> extends DefaultCacheFactory<K, V>
{
   private ClassLoader customClassLoader;
   
   public CustomClassLoaderCacheFactory(ClassLoader customClassLoader)
   {
      this.customClassLoader = customClassLoader;
   }
   
   @Override
   protected void bootstrap(CacheImpl cache, CacheSPI spi, Configuration configuration)
   {
      super.bootstrap(cache, spi, configuration);
      
      // Replace the deployerClassLoader
      componentRegistry.registerComponent("deployerClassLoader", customClassLoader, ClassLoader.class);
   }     
}

That works, but seems fragile, e.g .if how super.bootstrap() works changes it could break.  It would be better to have something more standardized; perhaps a property on DefaultCacheFactory that could be set, w/ a guarantee in the DefaultCacheFactory javadoc that it will be used if set.

Or something else. :-)  Manik, not sure where you're planning to go w/ defaultClassLoader; I'm just throwing this request out there to get the topic in JIRA.

OT: doing this is great in testsuites, as you can use it to configure a default classloader that can't see some of your test classes, and thus test marshalling.

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