com.metamatrix.common.id.dbid.spi
Interface DBIDSourceTransaction

All Superinterfaces:

TransactionInterface

All Known Implementing Classes:

DBIDResourceTransaction

public interface DBIDSourceTransaction
extends TransactionInterface

Defines methods used by DBIDGenerator create ID blocks.

Method Summary

ReservedIDBlock

createIDBlock(long blockSize, java.lang.String context, boolean wrapNumber) Create and return a new ReservedIDBlock.

Methods inherited from interface com.metamatrix.common.connection.TransactionInterface

close, commit, isClosed, isReadonly, rollback

Method Detail

createIDBlock

ReservedIDBlock createIDBlock(long blockSize,
                              java.lang.String context,
                              boolean wrapNumber)
                              throws java.lang.Exception

Create and return a new ReservedIDBlock.

Read in nextID from database, createIDBlock, then update nextID in database.

Parameters:

blockSize - size of id block

context -

wrapNumber - is true when the context is at its maximum limit and the next block should start over at the beginning

Returns:

ReservedIDBlock

Throws:

java.lang.Exception - when an error updating or reading the database occurs