java - Spring Hibernate: reload entity mappings -

on web application use spring 3.2 , hibernate 4.1.1 , implement plugin-like architecture. plugins can added , removed on runtime. each module defined separate class loader , create separate child application context on spring. complete configuration done using annotations, no xml config beans anymore.

spring hibernate configuration class

@configuration @enabletransactionmanagement public class hibernateconfigurationfactory {  @bean public jndiobjectfactorybean datasource() {     jndiobjectfactorybean ds = new jndiobjectfactorybean();     ds.setjndiname("java:jboss/datasources/ourownds");     ds.setresourceref(true);     return ds; }  @bean public localsessionfactorybean sessionfactory() {     localsessionfactorybean sessionfactory = new localsessionfactorybean();     sessionfactory.setpackagestoscan("com.foo.bar");     sessionfactory.setdatasource((datasource) datasource().getobject());      properties hibernateproperties = new properties();     hibernateproperties.put("hibernate.hbm2ddl.auto", "update");      sessionfactory.sethibernateproperties(hibernateproperties);      return sessionfactory; }  @bean public hibernatetransactionmanager transactionmanager() {     hibernatetransactionmanager transactionmanager = new hibernatetransactionmanager();     transactionmanager.setsessionfactory(sessionfactory().getobject());     return transactionmanager; }  } 

now problem: plugins contain own entity (+dao) classes added module during runtime.

is possible create kind of separate context on hibernate (as on spring) or add/reload additional entity classes?

will reloading entitymanager fit needs? happen loaded entities in context?

thanks , comment in advance.

update: did following , solved issue (but ran other issue.. later on).

i create new datasource + sessionfactory + transactionmanager each module/context , insert them new child applicationcontext. use class loader scann annotated classes , register them manually on application context , session factory using

localsessionfactorybean#setannotatedclasses(...) 

this works quite well... but...

next problem: classnotfoundexception seems class loader issue. hibernate uses system class loader instead of own pluginclassloader.

does know how inject own class loader hibernate?

is feasible inject environment , use source hibernate resources?

@configuration @enabletransactionmanagement public class hibernateconfigurationfactory {      @autowired     environment env;      @bean      public localsessionfactorybean sessionfactory() {         localsessionfactorybean sessionfactory = new localsessionfactorybean();         sessionfactory.setpackagestoscan("com.foo.bar");         if (env.containsproperty("some.extra.classes.property") {             sessionfactory.setannotatedclasses(some extrapolation here);             // or add packages scanning             ...         }     } } 

as dao beans, can use @profile that, or - if using spring 4 - use @conditional.

edit

the environment not create, it's "there you" . it's container property source , profile sets.

a reference point spring reference documentation, ioc container chapter. can @ springsource blog. there few article chris beams, related spring 3.1, of stuff there.

as example, can use bellow bootstrap child application context:

annotationconfigapplicationcontext context = new annotationconfigapplicationcontext(); configurableenvironment environment = context.getenvironment();  // how set different properties per sub context.  map subcontextmap = new hashmap(); subcontextmap.put("some.extra.classes.property", [unique value here]); environment.getpropertysources().addfirst(new mappropertysource("sub_ctx_map", subcontextmap);  // generic configuration class(es). context.register(hibernateconfigurationfactory.class);  context.refresh();