Hi,
I'm playing around with repositories and testing out multithreaded jpa
transactions.
I know discussions around em thread safety etc :-)
Anyways,
My current setup Im using managedexecutorservice and running 4 parallell
jobs each store or merge an Set of entities.
No duplicates.
Runnable is using UserTransaction.
DS 1.3.0
JTA and JTA em.
If I'm only injecting em I never have issues.
Using deltaspike, I get (and not always, but usually at merge):
java.util.concurrent.ExecutionException:
org.apache.deltaspike.data.api.QueryInvocationException: Failed calling
Repository:
[Repository=org.waastad.productcatalog.repository.FlatProductRepository,entity=org.waastad.entity.FlatProduct,method=findBy,exception=class
org.apache.deltaspike.data.api.QueryInvocationException,message=Failed
calling Repository:
[Repository=org.waastad.productcatalog.repository.FlatProductRepository,entity=org.waastad.entity.FlatProduct,method=findBy,exception=class
java.lang.NullPointerException,message=null
.
.
.
.
java.lang.NullPointerException,message=null
at
org.apache.deltaspike.data.impl.builder.DelegateQueryBuilder.execute(DelegateQueryBuilder.java:66)
at
org.apache.deltaspike.data.impl.builder.QueryBuilder.executeQuery(QueryBuilder.java:57)
at
org.apache.deltaspike.data.impl.tx.TransactionalQueryRunner.executeNonTransactional(TransactionalQueryRunner.java:66)
at
org.apache.deltaspike.data.impl.tx.TransactionalQueryRunner.executeQuery(TransactionalQueryRunner.java:61)
at
org.apache.deltaspike.data.impl.handler.QueryHandler.invoke(QueryHandler.java:79)
I can make you an example project if you're interested.
I'm probably pushing jpa since im importing ~1.5 mill in batch jobs, but as
I was saying....I'am testing :-)
BTW,
penalty using repositories are quite high compared to only using em (~50%
)...which probably is as expected, not?
br hw
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