WorkManager and UnitOfWork.REQUEST

[Michael Würtinger]

Hi folks,

I'm using Guice 2.0.1 and warp-persist 2.0 (the snapshot is several
weeks old)
in my non-web server application.

My warp-persist configuration is:
install(PersistenceService.usingHibernate().across
(UnitOfWork.REQUEST).buildModule());

The problem is that I get a ClassNotFoundException while creating the
Injector
(see below).

As I'm not really familiar with java servlets I can only guess that
warp-
persist somehow depends on it if using UnitOfWork.REQUEST.

Is there any possibility to use UnitOfWork.REQUEST without servlets?

Thanks,
Michael

Exception in thread "main" java.lang.NoClassDefFoundError:
javax/servlet/Filter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass
(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at com.wideplay.warp.persist.PersistenceServiceBuilderImpl
$2.publishWorkManager(PersistenceServiceBuilderImpl.java:59)
at
com.wideplay.warp.hibernate.HibernatePersistenceStrategy
$HibernatePersistenceModule.visit(HibernatePersistenceStrategy.java:
108)
at
com.wideplay.warp.persist.PersistenceServiceBuilderImpl.buildModule
(PersistenceServiceBuilderImpl.java:57)
at
ngbs.server.dao.hibernate.HibernateDaoModule.configure
(HibernateDaoModule.java:97)
at com.google.inject.AbstractModule.configure(AbstractModule.java:
59)
at
com.google.inject.spi.Elements$RecordingBinder.install(Elements.java:
223)
at com.google.inject.spi.Elements.getElements(Elements.java:101)
at
com.google.inject.internal.InjectorShell$Builder.build
(InjectorShell.java:127)
at
com.google.inject.internal.InjectorBuilder.build(InjectorBuilder.java:
103)
at com.google.inject.Guice.createInjector(Guice.java:93)
at com.google.inject.Guice.createInjector(Guice.java:70)
at com.google.inject.Guice.createInjector(Guice.java:60)
at ngbs.server.Main.main(Main.java:111)
Caused by: java.lang.ClassNotFoundException: javax.servlet.Filter
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 25 more

[Dhanji R. Prasanna]

Ohh you just need the servlet-api.jar in your class path. 

Technically you shouldn't have this dependency anymore, so Im puzzled as to why you're getting this error in a non-servlet environment. However, adding the jar is a straightforward way to fix at least this problem.

Dhanji.

--

You received this message because you are subscribed to the Google Groups "warp-core" group.
To post to this group, send email to warp...@googlegroups.com.
To unsubscribe from this group, send email to warp-core+...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/warp-core?hl=en.

[Michael Würtinger]

Hi Dhanji,

thanks for your quick response! I added the servlet-api.jar and
therefore got rid of the exception.

But now I have another problem: warp-persist behaves like
UnitOfWork.TRANSACTION.

I have several DAOs which each have several @Transactional methods and
I'm doing roughly the following:


BackupJob job = backupJobDao.load(1000);

List<DataObjectRevision> dataObjectRevisions =
dataObjectRevisionDao.forBackupJobAndFetchDataObjects(job);
logger.info("Got "+dataObjectRevisions.size()+" DataObjectRevisions");

Client targetNode = clientDao.getClientByName("ngbs-dev-vault1");
logger.info("Got client "+targetNode);

And I'm getting the following log output, which indicated that
Hibernate opens a new transaction (and session?) for each
@Transactional method.

10:00:38,656 DEBUG JDBCTransaction: begin
10:00:38,657 DEBUG JDBCTransaction: current autocommit status: false
10:00:38,766 DEBUG JDBCTransaction: commit
10:00:38,778 DEBUG JDBCTransaction: committed JDBC Connection
10:00:38,783 DEBUG JDBCTransaction: begin
10:00:38,783 DEBUG JDBCTransaction: current autocommit status: false
10:00:39,604 DEBUG JDBCTransaction: commit
10:00:39,660 DEBUG JDBCTransaction: committed JDBC Connection
10:00:39,662 INFO NgbsServerDaemonImpl$2: Got 154 DataObjectRevisions
10:00:39,665 DEBUG JDBCTransaction: begin
10:00:39,666 DEBUG JDBCTransaction: current autocommit status: false
10:00:39,674 DEBUG JDBCTransaction: commit
10:00:39,676 DEBUG JDBCTransaction: committed JDBC Connection
10:00:39,676 INFO NgbsServerDaemonImpl$2: Got client PhysicalNode
(id=114, name=ngbs-dev-vault1, address=172.22.195.45, metaNode=null)
10:00:39,677 INFO JobControllerFactoryImpl: Trying to save job
10:00:39,678 DEBUG JDBCTransaction: begin
10:00:39,678 DEBUG JDBCTransaction: current autocommit status: false
10:00:39,688 DEBUG JDBCTransaction: commit

As I'm new to Guice and warp-persist maybe I'm missing anything...?

It would be great if you could give me some hint about what I'm doing
wrong here.

Thanks,
Michael

[Dhanji R. Prasanna]

You have to set the session context propert to managed in hibernate. Are you sure you've got that correct?

Here is some more detail about it:

http://www.wideplay.com/webextensions::jpaintegration2

(scroll to the end of the page). If this doesn't fix it, please post your (jpa) config here and we can have a look.

Dhanji.

[Michael Würtinger]

Thanks a lot!

I changed hibernate.current_session_context_class from "thread" to
"managed" and now everything works fine.

~Michael