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org.eclipse.emf.transaction
Interface RunnableWithResult<T>

Type Parameters:

T - the result type of the runnable

All Superinterfaces:

Runnable

All Known Implementing Classes:

PrivilegedRunnable, RunnableWithResult.Impl

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public interface RunnableWithResult<T>
extends 
Runnable

Extends the core Java Runnable interface with the ability to return a result. Useful for returning results of read operations from the TransactionalEditingDomain.runExclusive(Runnable) method.

Also, because read transactions can roll back on commit if, for example, some other thread performs a concurrent write that corrupts the data being read, this interface also provides a means to set a status to indicate success or failure of the transaction.

See Also:

TransactionalEditingDomain.runExclusive(Runnable)

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Nested Class Summary
static class	RunnableWithResult.Impl< T>           A convenient partial implementation of the RunnableWithResult interface that implements a settable result field and commit status.

 

Method Summary
T	getResult ()           Returns a result computed by my Runnable.run() method.
IStatus	getStatus ()           Queries my commit status.
void	setStatus ( IStatus status)           Sets the commit status after completion of the Runnable.run() method.

 

Methods inherited from interface java.lang. Runnable
run

 

Method Detail

getResult

T getResult()

Returns a result computed by my Runnable.run() method.

Returns:

my result, or null if none

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setStatus

void setStatus(
IStatus status)

Sets the commit status after completion of the Runnable.run() method.

Parameters:

status - an OK status if commit succeeds, or an error status if it fails (in which case the transaction rolled back and the status provides details in human-readable form)

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getStatus

IStatus getStatus()

Queries my commit status. My status is only available after I have finished running and after the editing domain has attempted to commit my transaction.

Returns:

the status of my commit (as set by the setStatus(IStatus) method)

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