Package nl.cwi.monetdb.embedded.env

Class MonetDBEmbeddedSavePoint

java.lang.Object

nl.cwi.monetdb.embedded.env.MonetDBEmbeddedSavePoint

All Implemented Interfaces:

Savepoint

public class MonetDBEmbeddedSavePoint
extends Object
implements Savepoint

The representation of a savepoint, which is a point within the current transaction that can be referenced from the Connection.rollback method. When a transaction is rolled back to a savepoint all changes made after that savepoint are undone. Savepoints can be either named or unnamed. Unnamed savepoints are identified by an ID generated by the underlying data source. This little class is nothing more than a container for a name and/or an id. Each instance of this class always has an id, which is used for internal representation of the save point. Because the IDs which get generated are a logical sequence, application wide, two concurrent transactions are guaranteed to not to have the same save point identifiers. In this implementation the validaty of save points is determined by the server, which makes this a light implementation.

Version:

1.0

Author:

Pedro Ferreira, Fabian Groffen

Constructor Summary

Constructors

Constructor	Description
MonetDBEmbeddedSavePoint()
MonetDBEmbeddedSavePoint(String name)

Method Summary

Modifier and Type	Method	Description
int	getSavepointId()	Retrieves the generated ID for the savepoint that this Savepoint object represents.
String	getSavepointName()	Retrieves the name of the savepoint that this Savepoint object represents.

Methods inherited from class java.lang.Object

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

Constructor Detail

MonetDBEmbeddedSavePoint

public MonetDBEmbeddedSavePoint(String name)
                         throws IllegalArgumentException

Throws:

IllegalArgumentException

MonetDBEmbeddedSavePoint

public MonetDBEmbeddedSavePoint()

Method Detail

getSavepointId

public int getSavepointId()
                   throws MonetDBEmbeddedException

Retrieves the generated ID for the savepoint that this Savepoint object represents.

Specified by:

getSavepointId in interface Savepoint

Returns:

the numeric ID of this savepoint

Throws:

MonetDBEmbeddedException - if this is a named savepoint

getSavepointName

public String getSavepointName()
                        throws MonetDBEmbeddedException

Retrieves the name of the savepoint that this Savepoint object represents.

Specified by:

getSavepointName in interface Savepoint

Returns:

the name of this savepoint

Throws:

MonetDBEmbeddedException - if this is an un-named savepoint