com.metamatrix.common.id.dbid.spi.jdbc
Class DBIDResourceTransaction

java.lang.Object
  com.metamatrix.common.connection.BaseTransaction
      com.metamatrix.common.id.dbid.spi.jdbc.DBIDResourceTransaction

All Implemented Interfaces:

TransactionInterface, DBIDSourceTransaction

public class DBIDResourceTransaction
extends BaseTransaction
implements DBIDSourceTransaction

TransactionSourceTransaction implementation.

Constructor Summary

DBIDResourceTransaction(ManagedConnection connection, boolean readonly)
Create a new instance of a transaction for a managed connection.

Method Summary

ReservedIDBlock

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

Methods inherited from class com.metamatrix.common.connection.BaseTransaction

close, commit, finalize, getConnection, getRollbackOnFinalize, isClosed, isEnded, isReadonly, rollback, setRollbackOnFinalize

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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

close, commit, isClosed, isReadonly, rollback

Constructor Detail

DBIDResourceTransaction

public DBIDResourceTransaction(ManagedConnection connection,
                               boolean readonly)
                        throws ManagedConnectionException

Create a new instance of a transaction for a managed connection.

Parameters:

connectionPool - the pool to which the transaction should return the connection when completed

connection - the connection that should be used and that was created using this factory's createConnection method (thus the transaction subclass may cast to the type created by the createConnection method.

readonly - true if the transaction is to be readonly, or false otherwise

Throws:

ManagedConnectionException - if there is an error creating the transaction.

Method Detail

createIDBlock

public 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.

Specified by:

createIDBlock in interface DBIDSourceTransaction

Parameters:

blockSize - size of id block

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

Returns:

ReservedIDBlock instance

Throws:

TransactionServiceException - when an error updating or reading the database occurs

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