Package org.eclipse.emf.cdo.util
Class ContainmentCycleException
java.lang.Object
java.lang.Throwable
java.lang.Exception
org.eclipse.emf.cdo.util.CommitException
org.eclipse.emf.cdo.util.ConcurrentAccessException
org.eclipse.emf.cdo.util.ContainmentCycleException
- All Implemented Interfaces:
Serializable
A
concurrent access exception
that indicates an attempt of the local transaction to introduce a containment cycle.
A containment cycle is an effect of a network race condition between two transactions that commit changes to possibly disjunct sets of objects. As a result
the overall tree structure of the model would be destroyed in a way that the tree root would no longer be reachable from objects involved in the containment cycle.
Commits that attempt to introduce containment cycles are detected by the repository and canceled. Note that locking all involved dirty objects
does not properly address the problem because the involved container objects may not be dirty.
It's usually possible and adequate to rollback
the transaction, replay the model modifications and
commit the transaction again (optimistic strategy). Pessimistic locks on the dirty objects can not safely avoid the problem; you must expect this exception to occur.
- Since:
- 4.2
- Author:
- Eike Stepper
- See Also:
- No Extend
- This interface is not intended to be extended by clients.
- No Instantiate
- This class is not intended to be instantiated by clients.
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Constructor Summary
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Method Summary
Methods inherited from class org.eclipse.emf.cdo.util.CommitException
isLocal, wrap
Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
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Constructor Details
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ContainmentCycleException
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