org.apache.derby.impl.store.raw.data
Interface AllocationActions

All Known Implementing Classes:

DirectAllocActions, LoggableAllocActions

public interface AllocationActions

This interface describe the operations that has to do with page allocation/deallocation. This interface is used for a special allocation page that records the allocation information and dispense the allocation policy.

Method Summary

void	actionAllocatePage(RawTransaction t, BasePage allocPage, long pageNumber, int doStatus, int undoStatus) Set the allocation status of pageNumber to doStatus.
void	actionChainAllocPage(RawTransaction t, BasePage allocPage, long pageNumber, long pageOffset) Chain one allocation page to the next.

Method Detail

actionAllocatePage

public void actionAllocatePage(RawTransaction t,
                               BasePage allocPage,
                               long pageNumber,
                               int doStatus,
                               int undoStatus)
                        throws StandardException

Set the allocation status of pageNumber to doStatus. To undo this operation, set the allocation status of pageNumber to undoStatus

Parameters:

t - The transaction

pageNumber - the page to allocation or deallocation

doStatus - set the allocation status of the page this value

undoStatus - on undo, set the allocation status of the page this value

Throws:

StandardException - Standard Cloudscape error policy

actionChainAllocPage

public void actionChainAllocPage(RawTransaction t,
                                 BasePage allocPage,
                                 long pageNumber,
                                 long pageOffset)
                          throws StandardException

Chain one allocation page to the next.

Parameters:

t - The transaction

pageNumber - the next allocation page's number

pageOffset - the next allocation page's page offset

Throws:

StandardException - Standard Cloudscape error policy