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[CDO] Issue with closing view [message #1853064]

Thu, 16 June 2022 08:56

Ewoud Werkman

Messages: 28
Registered: January 2018

Junior Member

Hi!

After I open a view, retrieve a resource and then close the view I get the following exception:

 [DEBUG] Problem while deactivating View 81 [closed]
 java.lang.IllegalArgumentException: The feature 'resourceSet' is not a valid feature
 	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1101)
 	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1054)
 	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1042)
 	at org.eclipse.emf.cdo.eresource.impl.CDOResourceImpl.getResourceSet(CDOResourceImpl.java:298)
 	at org.eclipse.emf.cdo.eresource.impl.CDOResourceImpl.basicSetResourceSet(CDOResourceImpl.java:1678)
 	at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$ResourcesEList.inverseRemove(ResourceSetImpl.java:604)
 	at org.eclipse.emf.common.notify.impl.NotifyingListImpl.removeAll(NotifyingListImpl.java:950)
 	at org.eclipse.emf.internal.cdo.view.CDOViewSetImpl.remove(CDOViewSetImpl.java:234)
 	at org.eclipse.emf.internal.cdo.view.CDOViewImpl.doBeforeDeactivate(CDOViewImpl.java:1584)
 	at org.eclipse.net4j.util.lifecycle.Lifecycle.internalDeactivate(Lifecycle.java:123)
 	at org.eclipse.net4j.util.lifecycle.Lifecycle.deactivate(Lifecycle.java:184)
 	at org.eclipse.net4j.util.lifecycle.LifecycleUtil.deactivate(LifecycleUtil.java:254)
 	at org.eclipse.net4j.util.lifecycle.LifecycleUtil.deactivate(LifecycleUtil.java:244)
 	at org.eclipse.net4j.util.lifecycle.LifecycleUtil.deactivate(LifecycleUtil.java:271)
 	at org.eclipse.emf.internal.cdo.view.AbstractCDOView.close(AbstractCDOView.java:3006)

I close views also in other (unrelated) parts of the code, without any problem.
This particular code retrieves the History and iterates over the CommitInfos.

Even if I add

if (!cdoResource.cdoView().isClosed()) {
      cdoResource.cdoView().close();
}

it throws the exception.

What do I miss here?

Kind regards,
Ewoud

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Re: [CDO] Issue with closing view [message #1853069 is a reply to message #1853064]

Thu, 16 June 2022 15:12

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Ewoud Werkman wrote on Thu, 16 June 2022 10:56

Hi!

After I open a view, retrieve a resource and then close the view I get the following exception:

 [DEBUG] Problem while deactivating View 81 [closed]
 java.lang.IllegalArgumentException: The feature 'resourceSet' is not a valid feature
 	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eOpenGet(BasicEObjectImpl.java:1101)
 	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1054)

Have a look at this method in BasicEObjectImpl:

  public Object eGet(EStructuralFeature eFeature, boolean resolve, boolean coreType)
  {
    int featureID = eDerivedStructuralFeatureID(eFeature);
    if (featureID >= 0)
    {
      return eGet(featureID, resolve, coreType);
    }
    else
    {
      return eOpenGet(eFeature, resolve);
    }
  }

I've run thousands of test cases but I did never hit a breakpoint on the call to BasicEObjectImpl.eOpenGet() and I have no idea why eDerivedStructuralFeatureID(eFeature) would return a value < 0 (probably -1). I fear you have to set a breakpoint there yourself and find it out. Or provide me with an executable test case that reproduces the problem.

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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