The following comment has been added to this issue:
Author: James Carman
Created: Wed, 15 Sep 2004 9:21 AM
Body:
I think we need to take a step back and look at a bigger picture. We shouldn't
concentrate upon making hibernate-specific services. We should work to provide
a general framework for DAOs (a la Spring). In my article, I created a
generalized TransactionServices (begin, commit, rollback, rollbackOnly, etc.)
which is used by a transaction coordinator (or manager). Now, in a hibernate
environment, I'll use a hibernate-specific version of the TransactionServices
interface. With JDO, I'll use a JDO-specific version. This is where we should
lean, IMHO.
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View this comment:
http://issues.apache.org/jira/browse/HIVEMIND-54?page=comments#action_53112
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View the issue:
http://issues.apache.org/jira/browse/HIVEMIND-54
Here is an overview of the issue:
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Key: HIVEMIND-54
Summary: Request for built-in support for Hibernate in HiveMind lib
Type: New Feature
Status: Open
Priority: Major
Project: HiveMind
Components:
hivebuild
examples
documentation
Assignee: Howard M. Lewis Ship
Reporter: Yuxiang Bu
Created: Mon, 13 Sep 2004 2:24 AM
Updated: Wed, 15 Sep 2004 9:21 AM
Description:
Request for adding build-in support for Hibernate Session and Transaction
management in HiveMind lib.
Since Hibernate is so popular now, I believe it will become a hot request.
At first I try to develop an HibernateInterceptorFactory service using
javassist.
But I found javassist cannot support "finally" yet. And the target code like
this:
boolean isTransactionBegunInThisMethod = false;
try {
isTransactionBegunInThisMethod = tm.beginTransaction();
Object result = _inner....
if (isTransactionBegunInThisMethod)
tm.commitTransaction();
return result;
} finally {
if (isTransactionBegunInThisMethod)
tm.rollbackTransaction();
}
And I cannot develop similar codes in javassist.
Then I developed an Interceptor with JDK proxy.
However, the interceptor cannot be used after HiveMind LoggingInterceptor.
The Registry successfully applies my HibernateInterceptor to service but fail
to apply the Logging Interceptor.
org.apache.hivemind.ApplicationRuntimeException: Unable to construct service
doconline.Adder: Unable to lookup $Proxy0: $Proxy0
at
org.apache.hivemind.impl.servicemodel.AbstractServiceModelImpl.constructNewServiceImplementation(AbstractServiceModelImpl.java:156)
......
Caused by: org.apache.hivemind.ApplicationRuntimeException: Unable to lookup
$Proxy0: $Proxy0
at
org.apache.hivemind.service.impl.CtClassSource.getCtClass(CtClassSource.java:60)
at
org.apache.hivemind.service.impl.ClassFabImpl.addField(ClassFabImpl.java:71)
at
org.apache.hivemind.service.impl.LoggingInterceptorFactory.createInfrastructure(LoggingInterceptorFactory.java:236)
......
Caused by: javassist.NotFoundException: $Proxy0
at javassist.ClassPoolTail.openClassfile(ClassPoolTail.java:300)
at javassist.ClassPoolTail.checkClassName(ClassPoolTail.java:177)
at javassist.ClassPool.checkClassName(ClassPool.java:709)
at javassist.ClassPool.get0(ClassPool.java:572)
at javassist.ClassPool.get(ClassPool.java:561)
at
org.apache.hivemind.service.impl.CtClassSource.getCtClass(CtClassSource.java:56)
... 48 more
The problem seems occurs when javassist want to find the class file in
classpath but cannot find it( Of course it cannot ).
If I put Transaction Interceptor before the Logging Interceptor, all works well.
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