org.h2.mvstore
Class TransactionStore.Transaction

java.lang.Object
  org.h2.mvstore.TransactionStore.Transaction

Enclosing class:

TransactionStore

public static class TransactionStore.Transaction
extends java.lang.Object

A transaction.

Field Summary

static int	STATUS_CLOSED The status of a closed transaction (committed or rolled back).
static int	STATUS_OPEN The status of an open transaction.
static int	STATUS_PREPARED The status of a prepared transaction.

Method Summary

void	commit() Commit the transaction.
long	getId() Get the transaction id.
java.lang.String	getName() Get the name of the transaction.
int	getStatus() Get the transaction status.
<K,V> TransactionStore.TransactionMap<K,V>	openMap(java.lang.String name) Open a data map where reads are always up to date.
<K,V> TransactionStore.TransactionMap<K,V>	openMap(java.lang.String name, long readVersion) Open a data map where reads are based on the specified version / savepoint.
void	prepare() Prepare the transaction.
void	rollback() Roll the transaction back.
void	rollbackToSavepoint(long savepointId) Roll back to the given savepoint.
void	setName(java.lang.String name) Set the name of the transaction.
long	setSavepoint() Create a new savepoint.

Methods inherited from class java.lang.Object

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

Field Detail

STATUS_OPEN

public static final int STATUS_OPEN

The status of an open transaction.

See Also:

Constant Field Values

STATUS_PREPARED

public static final int STATUS_PREPARED

The status of a prepared transaction.

See Also:

Constant Field Values

STATUS_CLOSED

public static final int STATUS_CLOSED

The status of a closed transaction (committed or rolled back).

See Also:

Constant Field Values

Method Detail

getId

public long getId()

Get the transaction id.

Returns:

the transaction id

getStatus

public int getStatus()

Get the transaction status.

Returns:

the status

setName

public void setName(java.lang.String name)

Set the name of the transaction.

Parameters:

name - the new name

getName

public java.lang.String getName()

Get the name of the transaction.

Returns:

name the name

setSavepoint

public long setSavepoint()

Create a new savepoint.

Returns:

the savepoint id

openMap

public <K,V> TransactionStore.TransactionMap<K,V> openMap(java.lang.String name)

Open a data map where reads are always up to date.

Type Parameters:

K - the key type

V - the value type

Parameters:

name - the name of the map

Returns:

the transaction map

openMap

public <K,V> TransactionStore.TransactionMap<K,V> openMap(java.lang.String name,
                                                          long readVersion)

Open a data map where reads are based on the specified version / savepoint.

Type Parameters:

K - the key type

V - the value type

Parameters:

name - the name of the map

readVersion - the version used for reading

Returns:

the transaction map

rollbackToSavepoint

public void rollbackToSavepoint(long savepointId)

Roll back to the given savepoint. This is only allowed if the transaction is open.

Parameters:

savepointId - the savepoint id

prepare

public void prepare()

Prepare the transaction. Afterwards, the transaction can only be committed or rolled back.

commit

public void commit()

Commit the transaction. Afterwards, this transaction is closed.

rollback

public void rollback()

Roll the transaction back. Afterwards, this transaction is closed.