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[Transaction] createPrivilegedRunnable [message #84964]

Fri, 25 May 2007 14:51

Eclipse User

Originally posted by: james.willans.xactium.com

Is it possible to enable an already running java thread to update
resources within a transactional editing domain? createPrivilegedRunnable
seems to force you to start the thread that is returned, but the thread in
question has already been started.

Thanks,

James

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Re: [Transaction] createPrivilegedRunnable [message #84998 is a reply to message #84964]

Fri, 25 May 2007 15:40

Eclipse User

Originally posted by: cdamus.ca.ibm.com

Hi, James,

Please use the EMF newsgroup (included in my reply) for questions about the
Transaction component.

The privileged runnable doesn't impose any restriction on when a client
should start the thread that is to run the runnable.
TransactionalEditingDomain::createPrivilegedRunnable() doesn't return a
thread; it returns a runnable.

To execute the runnable on a thread that is already in progress, you can use
whatever means that thread provides. The most common example is the
display thread: you would run the runnable on the display thread using
Display::syncExec() on the Display object corresponding to the target
thread.

Note that it attempting to run the privileged runnable asynchronously (with
respect to the thread that currently owns the transaction) is absolutely
out of the question, as it will surely result in corruption of the
transaction state.

For more information, see the Programmer's Guide topic about sharing
transactions between threads, which is new since 1.1 M7.

HTH,

Christian

James Willans wrote:

> Is it possible to enable an already running java thread to update
> resources within a transactional editing domain? createPrivilegedRunnable
> seems to force you to start the thread that is returned, but the thread in
> question has already been started.
>
> Thanks,
>
> James

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Re: [Transaction] createPrivilegedRunnable [message #85013 is a reply to message #84998]

Fri, 25 May 2007 15:40

Eclipse User

Originally posted by: cdamus.ca.ibm.com

Oops ... forgot to redirect to the EMF newsgroup

cW

Christian W. Damus wrote:

> Hi, James,
>
> Please use the EMF newsgroup (included in my reply) for questions about
> the Transaction component.
>
> The privileged runnable doesn't impose any restriction on when a client
> should start the thread that is to run the runnable.
> TransactionalEditingDomain::createPrivilegedRunnable() doesn't return a
> thread; it returns a runnable.
>
> To execute the runnable on a thread that is already in progress, you can
> use
> whatever means that thread provides. The most common example is the
> display thread: you would run the runnable on the display thread using
> Display::syncExec() on the Display object corresponding to the target
> thread.
>
> Note that it attempting to run the privileged runnable asynchronously
> (with respect to the thread that currently owns the transaction) is
> absolutely out of the question, as it will surely result in corruption of
> the transaction state.
>
> For more information, see the Programmer's Guide topic about sharing
> transactions between threads, which is new since 1.1 M7.
>
> HTH,
>
> Christian
>
> James Willans wrote:
>
>> Is it possible to enable an already running java thread to update
>> resources within a transactional editing domain?
>> createPrivilegedRunnable seems to force you to start the thread that is
>> returned, but the thread in question has already been started.
>>
>> Thanks,
>>
>> James

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