The following comment has been added to this issue:
Author: Marcus Brito
Created: Thu, 16 Sep 2004 5:36 AM
Body:
I'm worried about duplication of effort here. Couldn't we leverage what's
already in the wild (read: spring)? Things like transaction demarcation, jdbc
and orm support are battered subjects and we should try to integrate what's
already available with Hivemind.
As Howard is fond of saying, Hivemind is object soup. Can't we just throw in
those spring object/classes instead of cooking everything again?
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View this comment:
http://issues.apache.org/jira/browse/HIVEMIND-54?page=comments#action_53136
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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: Thu, 16 Sep 2004 5:36 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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