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[CDO] Meta-reference dynamic objects [message #1842651]

Sat, 26 June 2021 16:50

Eclipse User

Hi,
thanks for everyone working on CDO.

I have a problem when trying to save a dynamic object of an Eclass stored in the repository that references another model resource from the same repository.

I'm afraid I'm not doing something correct with URI mappings. unfortunately I don't have much experience with EMF URI mappings, but I can reproduce the issue with current CDO tests: I've added a testMetaProxyDynamic() test case in the MetaTest.java (see attachment)

Any help greatly appreciated.

There are various errors I get with different combinations of tries, the current one is:

*******************************************************
MetaTest.testMetaProxyDynamic [MEM-branching, JVM, Native]
*******************************************************
[ERROR] Unresolvable proxy: http://www.eclipse.org/emf/CDO/tests/dynamic-model1/L5
java.lang.IllegalStateException: Unresolvable proxy: http://www.eclipse.org/emf/CDO/tests/dynamic-model1/L5
	at org.eclipse.emf.cdo.common.model.EMFUtil.safeResolve(EMFUtil.java:721)
	at org.eclipse.emf.cdo.common.model.EMFUtil.safeResolveAll(EMFUtil.java:751)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicatingRead(CommitTransactionIndication.java:189)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicating(CommitTransactionIndication.java:102)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CDOServerIndicationWithMonitoring.indicating(CDOServerIndicationWithMonitoring.java:118)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.indicating(IndicationWithMonitoring.java:87)
	at org.eclipse.net4j.signal.IndicationWithResponse.doExtendedInput(IndicationWithResponse.java:100)
	at org.eclipse.net4j.signal.Signal.doInput(Signal.java:391)
	at org.eclipse.net4j.signal.IndicationWithResponse.execute(IndicationWithResponse.java:73)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.execute(IndicationWithMonitoring.java:66)
	at org.eclipse.net4j.signal.Signal.runSync(Signal.java:297)
	at org.eclipse.net4j.signal.Signal.run(Signal.java:169)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)


org.eclipse.emf.cdo.util.CommitException: org.eclipse.net4j.signal.RemoteException: java.lang.IllegalStateException: Unresolvable proxy: http://www.eclipse.org/emf/CDO/tests/dynamic-model1/L5
	at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commitSynced(CDOTransactionImpl.java:1730)
	at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commit(CDOTransactionImpl.java:1625)
	at org.eclipse.emf.internal.cdo.transaction.CDOTransactionImpl.commit(CDOTransactionImpl.java:1591)
	at org.eclipse.emf.cdo.tests.MetaTest.testMetaProxyDynamic(MetaTest.java:106)
	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:177)
	at org.eclipse.net4j.util.tests.AbstractOMTest.access$1(AbstractOMTest.java:1)
	at org.eclipse.net4j.util.tests.AbstractOMTest$3.execute(AbstractOMTest.java:312)
	at org.eclipse.net4j.internal.util.test.TestExecuter.execute(TestExecuter.java:40)
	at org.eclipse.net4j.util.tests.AbstractOMTest.runBare(AbstractOMTest.java:298)
	at org.eclipse.emf.cdo.tests.config.impl.ConfigTest.runBare(ConfigTest.java:647)
	at junit.framework.TestResult$1.protect(TestResult.java:122)
	at junit.framework.TestResult.runProtected(TestResult.java:142)
	at junit.framework.TestResult.run(TestResult.java:125)
	at junit.framework.TestCase.run(TestCase.java:130)
	at org.eclipse.net4j.util.tests.AbstractOMTest.run(AbstractOMTest.java:372)
	at junit.framework.TestSuite.runTest(TestSuite.java:241)
	at junit.framework.TestSuite.run(TestSuite.java:236)
	at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:90)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:768)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: org.eclipse.net4j.signal.RemoteException: java.lang.IllegalStateException: Unresolvable proxy: http://www.eclipse.org/emf/CDO/tests/dynamic-model1/L5
	at org.eclipse.net4j.signal.RequestWithConfirmation.getRemoteException(RequestWithConfirmation.java:142)
	at org.eclipse.net4j.signal.RequestWithConfirmation.setRemoteException(RequestWithConfirmation.java:131)
	at org.eclipse.net4j.signal.SignalProtocol.handleRemoteException(SignalProtocol.java:562)
	at org.eclipse.net4j.signal.RemoteExceptionIndication.indicating(RemoteExceptionIndication.java:62)
	at org.eclipse.net4j.signal.Indication.doExtendedInput(Indication.java:57)
	at org.eclipse.net4j.signal.Signal.doInput(Signal.java:391)
	at org.eclipse.net4j.signal.Indication.execute(Indication.java:51)
	at org.eclipse.net4j.signal.Signal.runSync(Signal.java:297)
	at org.eclipse.net4j.signal.Signal.run(Signal.java:169)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.IllegalStateException: Unresolvable proxy: http://www.eclipse.org/emf/CDO/tests/dynamic-model1/L5
	at org.eclipse.emf.cdo.common.model.EMFUtil.safeResolve(EMFUtil.java:721)
	at org.eclipse.emf.cdo.common.model.EMFUtil.safeResolveAll(EMFUtil.java:751)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicatingRead(CommitTransactionIndication.java:189)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CommitTransactionIndication.indicating(CommitTransactionIndication.java:102)
	at org.eclipse.emf.cdo.server.internal.net4j.protocol.CDOServerIndicationWithMonitoring.indicating(CDOServerIndicationWithMonitoring.java:118)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.indicating(IndicationWithMonitoring.java:87)
	at org.eclipse.net4j.signal.IndicationWithResponse.doExtendedInput(IndicationWithResponse.java:100)
	at org.eclipse.net4j.signal.Signal.doInput(Signal.java:391)
	at org.eclipse.net4j.signal.IndicationWithResponse.execute(IndicationWithResponse.java:73)
	at org.eclipse.net4j.signal.IndicationWithMonitoring.execute(IndicationWithMonitoring.java:66)
	... 5 more

Attachment: MetaTest.java
(Size: 6.46KB, Downloaded 108 times)

Re: [CDO] Meta-reference dynamic objects [message #1842758 is a reply to message #1842651]

Wed, 30 June 2021 11:39

Eclipse User

Why are you storing the meta models in the instance area (i.e. in CDOResources)? I'm not really sure what's going on in your test case, but I'm going to attach a corrected version of it.

Attachment: MetaTest.java
(Size: 6.86KB, Downloaded 112 times)

Re: [CDO] Meta-reference dynamic objects [message #1842768 is a reply to message #1842758]

Wed, 30 June 2021 15:48

Eclipse User

Hmm... thanks for taking the time to look at my attempt. But that was actually the goal - to have a meta-model and the model both dynamic in the repository (i.e. potentially modifiable by the end-user).

Is it not meant to be possible to use meta-model as model resources with CDO? I was able to create a proof-of-concept for creating an EClass and a dynamic object of that type in the same repository - so up to some level it can work. The problem above seems to occur if there are several levels of dependencies between packages(resources).

Is the scenario above really not supported? If so, I guess the "workaround" would be to just store snapshots of the meta-model resources as binary resources and download them locally to the client side before modelling the instance data.
I'd be happy to hear your perspective and suggestions.

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