Hello,
I'm relatively new to guice, and I've got a problem that I quite don't
understand.
I have a webapp based on guice, eclipse link, mysql that runs on a tomcat
7. The app uses a com.google.inject.persist.jpa.JpaPersistModule and
a com.google.inject.persist.PersistFilter
For some requests the webapp creates a set of java.lang.Runnable, passes
them to a java.util.concurrent.ExecutorService, and returns. The runnables
are numerous time-consuming jobs that must be executed in background to
avoid blocking the request. Also, each job has to access the EntityManager.
However, the current implementation is quite naive:
@Inject private Provider<MyRunnable> myRunnableProvider;
@Inject private ExecutorService executorService;
MyRunnable runnable = myRunnableProvider.get();
executorService.submit(runnable);
This code runs fine on my development computer, but I get this exception
when I run it in a production environment :
java.lang.IllegalStateException: Work already begun on this thread. Looks
like you have called UnitOfWork.begin() twice without a balancing call to
end() in between.
at com.google.common.base.Preconditions.checkState(Preconditions.java:
150) ~[guava-15.0.jar:na]
at com.google.inject.persist.jpa.JpaPersistService.begin(
JpaPersistService.java:73) ~[guice-persist-4.0.jar:na]
at com.jbl.MyRunnable.run(MyRunnable.java:107)
I think that this has something to do with the Scope, but I don't quite
understand how to correct this.
Thank you for any insight on this !
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