org.apache.derby.iapi.services.locks

Interface CompatibilitySpace

public interface CompatibilitySpace

This interface must be implemented by objects returned from LockFactory.createCompatibilitySpace().

A CompatibilitySpace can have an owner (for instance a transaction). Currently, the owner is used by the virtual lock table to find out which transaction a lock belongs to. Some parts of the code also use the owner as a group object which guarantees that the lock is released on a commit or an abort. The owner has no special meaning to the lock manager and can be any object, including null.

See Also:

LockFactory.createCompatibilitySpace(org.apache.derby.iapi.services.locks.LockOwner)

Method Summary

Modifier and Type	Method and Description
LockOwner	getOwner() Gets an object representing the owner of the compatibility space.

Method Detail

getOwner

LockOwner getOwner()

Gets an object representing the owner of the compatibility space.

Returns:

object representing the owner of the compatibility space, or null if no owner has been specified.