Michael Wiles created OPENJPA-2844:
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Summary: Unable to call getProperties on EnitityManagerFactory
before createEntityManager is called.
Key: OPENJPA-2844
URL: https://issues.apache.org/jira/browse/OPENJPA-2844
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 3.1.3
Reporter: Michael Wiles
It seems that with OPENJPA-2834 I can no longer call getProperties on
EntityManagerFactory without calling createEntityManager first. AFAICT
createEntityManager calls the "other" path and actually does initalise the
BrokerImpl.
If I add the following to the TestGetProperty in persistence-jdbc...
{code:java}
public void testGetProperties() {
emf.getProperties();
}{code}
I get an NPE because _conf in BrokerImpl is not initialised because initialise
in this BrokerImpl has not been called.
{noformat}
java.lang.NullPointerException at
org.apache.openjpa.kernel.BrokerImpl.getProperties(BrokerImpl.java:792) at
org.apache.openjpa.kernel.DelegatingBroker.getProperties(DelegatingBroker.java:228)
at
org.apache.openjpa.persistence.EntityManagerImpl.getProperties(EntityManagerImpl.java:1967)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.doCreateEM(EntityManagerFactoryImpl.java:300)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.getProperties(EntityManagerFactoryImpl.java:122)
at
org.apache.openjpa.conf.TestGetProperty.testGetProperties(TestGetProperty.java:48)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
Method) at
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566) at
junit.framework.TestCase.runTest(TestCase.java:176) at
junit.framework.TestCase.runBare(TestCase.java:141){noformat}
This occurs because the new code for "byPassSynchronizeMappings" mode of
initialising the broker does not in fact call initialise...
line 280 of EntityManagerFactoryImpl:
{code:java}
Broker broker = byPassSynchronizeMappings ?
conf.newBrokerInstance(user, pass) :
_factory.newBroker(user, pass, managed, retainMode, false, cfName,
cf2Name);{code}
That conf.newBrokerInstance does not call initialise on the broker so the
_conf field in BrokerImpl is null - thus the NPE when calling getProperties.
I'm not sure if this is expected behaviour or not in this context.
I picked up the issue when running with Spring and Spring data - this depends
on the ability to successfully call getProperties before an entity manager has
been created.
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