title: db4o - DatabaseClosedException
body: <p>I am trying to store an entity with db4o through an arquillian test case and am getting a DatabaseClosedException:</p>
  
  <hr>
  
  <h2>Test set: com.walterjwhite.address.api.datastore.TestAddressDatastore</h2>
  
  <p>Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.149 sec &lt;&lt;&lt; FAILURE!
  test_save(com.walterjwhite.address.api.datastore.TestAddressDatastore)  Time elapsed: 0.68 sec  &lt;&lt;&lt; ERROR!
  com.db4o.ext.DatabaseClosedException
      at com.db4o.internal.ObjectContainerBase.checkClosed(ObjectContainerBase.java:303)
      at com.db4o.internal.ObjectContainerBase.checkTransaction(ObjectContainerBase.java:331)
      at com.db4o.internal.ObjectContainerBase.asTopLevelStore(ObjectContainerBase.java:412)
      at com.db4o.internal.ObjectContainerBase.storeInternal(ObjectContainerBase.java:1602)
      at com.db4o.internal.ObjectContainerBase.store(ObjectContainerBase.java:1584)
      at com.db4o.internal.ObjectContainerBase.store(ObjectContainerBase.java:1576)
      at com.db4o.internal.ObjectContainerSession.store(ObjectContainerSession.java:360)
      at com.walterjwhite.datastore.api.AbstractDatastore.save(AbstractDatastore.java:79)
      at com.walterjwhite.address.api.datastore.org$jboss$weld$bean-0b7a0e6e-330e-4c1b-8c9e-1e90ab004c80$jar-ManagedBean-class_com$walterjwhite$address$api$datastore$AddressDatastore_$$_WeldClientProxy.save(org$jboss$weld$bean-0b7a0e6e-330e-4c1b-8c9e-1e90ab004c80$jar-ManagedBean-class_com$walterjwhite$address$api$datastore$AddressDatastore_$$_WeldClientProxy.java)
      at com.walterjwhite.address.api.datastore.TestAddressDatastore.test_save(TestAddressDatastore.java:67)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
      at org.jboss.arquillian.junit.Arquillian$6$1.invoke(Arquillian.java:259)
      at org.jboss.arquillian.impl.execution.LocalTestExecuter.execute(LocalTestExecuter.java:63)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.invokeObservers(EventContextImpl.java:98)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:80)
      at org.jboss.arquillian.impl.core.ManagerImpl.fire(ManagerImpl.java:126)
      at org.jboss.arquillian.impl.core.ManagerImpl.fire(ManagerImpl.java:106)
      at org.jboss.arquillian.impl.core.EventImpl.fire(EventImpl.java:67)
      at org.jboss.arquillian.impl.client.protocol.local.LocalContainerMethodExecutor.invoke(LocalContainerMethodExecutor.java:50)
      at org.jboss.arquillian.impl.execution.RemoteTestExecuter.execute(RemoteTestExecuter.java:97)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.invokeObservers(EventContextImpl.java:98)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:80)
      at org.jboss.arquillian.impl.core.ManagerImpl.fire(ManagerImpl.java:126)
      at org.jboss.arquillian.impl.core.ManagerImpl.fire(ManagerImpl.java:106)
      at org.jboss.arquillian.impl.core.EventImpl.fire(EventImpl.java:67)
      at org.jboss.arquillian.impl.execution.ClientTestExecuter.execute(ClientTestExecuter.java:65)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.invokeObservers(EventContextImpl.java:98)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:80)
      at org.jboss.arquillian.impl.client.ContainerDeploymentContextHandler.createContext(ContainerDeploymentContextHandler.java:133)
      at org.jboss.arquillian.impl.client.ContainerDeploymentContextHandler.createTestContext(ContainerDeploymentContextHandler.java:120)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:87)
      at org.jboss.arquillian.impl.TestContextHandler.createTestContext(TestContextHandler.java:82)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:87)
      at org.jboss.arquillian.impl.TestContextHandler.createClassContext(TestContextHandler.java:68)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:87)
      at org.jboss.arquillian.impl.TestContextHandler.createSuiteContext(TestContextHandler.java:54)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.jboss.arquillian.impl.core.ObserverImpl.invoke(ObserverImpl.java:90)
      at org.jboss.arquillian.impl.core.EventContextImpl.proceed(EventContextImpl.java:87)
      at org.jboss.arquillian.impl.core.ManagerImpl.fire(ManagerImpl.java:126)
      at org.jboss.arquillian.impl.EventTestRunnerAdaptor.test(EventTestRunnerAdaptor.java:101)
      at org.jboss.arquillian.junit.Arquillian$6.evaluate(Arquillian.java:251)
      at org.jboss.arquillian.junit.Arquillian$4.evaluate(Arquillian.java:214)
      at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:303)
      at org.jboss.arquillian.junit.Arquillian.access$300(Arquillian.java:45)
      at org.jboss.arquillian.junit.Arquillian$5.evaluate(Arquillian.java:228)
      at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
      at org.jboss.arquillian.junit.Arquillian$2.evaluate(Arquillian.java:173)
      at org.jboss.arquillian.junit.Arquillian.multiExecute(Arquillian.java:303)
      at org.jboss.arquillian.junit.Arquillian.access$300(Arquillian.java:45)
      at org.jboss.arquillian.junit.Arquillian$3.evaluate(Arquillian.java:187)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
      at org.jboss.arquillian.junit.Arquillian.run(Arquillian.java:127)
      at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:35)
      at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:115)
      at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:97)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:616)
      at org.apache.maven.surefire.booter.ProviderFactory$ClassLoaderProxy.invoke(ProviderFactory.java:103)
      at $Proxy0.invoke(Unknown Source)
      at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:150)
      at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcess(SurefireStarter.java:91)
      at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:69)</p>
  
  <pre><code>@Produces
  protected ObjectServer openServer(ApplicationContext applicationContext)
  {
      return (Db4oClientServer.openServer("/tmp/test.db4o", 0));
  }
  
  @Produces
  public ObjectContainer getObjectContainer(ObjectServer objectServer)
  {
      return (objectServer.openClient());
  }
  </code></pre>
  
  <p>For my test case, I am creating an object server with the file in /tmp.  The file is created, the object container is automatically injected through a setter, otherwise the objectContainer would be null and this would be a different exception.</p>
  
  <p>I put some debug statements into the code to make sure the dispose method wasn't being called until after the store invocation so I can rule out that potential issue.</p>
  
  <p>What else do I need to do to prepare the container?</p>
  
  <p>Thanks,</p>
  
  <p>Walter</p>