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From "Albert Lee (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (OPENJPA-362) Object Locking API problems
Date Mon, 10 Sep 2007 21:32:29 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Albert Lee resolved OPENJPA-362.
--------------------------------

    Resolution: Invalid

Patrick, 

Thanks for the clarifications.

I was looking for lockInternal() definitions but missed the one in PessimisticLockManager
using Eclipse.

> Object Locking API problems
> ---------------------------
>
>                 Key: OPENJPA-362
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-362
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>    Affects Versions: 1.0.0
>         Environment: All platforms
>            Reporter: Albert Lee
>
> The manual describes the following Object Locking API
> public void lock(Object pc);
> public void lock(Object pc, LockModeType mode, long timeout);
> public void lockAll(Object... pcs);
> public void lockAll(Object... pcs, LockModeType mode, long timeout);
> public void lockAll(Collection pcs);
> public void lockAll(Collection pcs, LockModeType mode, long timeout);
> Problems observed:
> 1)  In EntityManagerImpl,
>   Missing method implementation
>         public void lockAll(Object... pcs, LockModeType mode, long timeout);
>   But found this instead.
>         public void lockAll(Object[] entities, LockModeType mode, int timeout) {
> 2) For those API methods with timeout argument, what is the behavior when timeout occurs?
Will an exception be thrown? Since these method has void return, no return value can be used
to indicate the timeout condition.
> 3) For those API methods with timeout argument, the timeout value does not seem to be
used at all, hence the timeout feature is a NOP. 
>       i.e. EntityManagerImpl.lock*() -> BrokerImpl.lock() --> VersionLockManager
| NonLockManager
>     a) Is the API just an architected feature?
>     b)  Is the timeout feature not implemented and require user to implements its lock
manager that support the timeout feature?
> Albert Lee.

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