org.springframework.transaction.support

Class DefaultTransactionDefinition

java.lang.Object

org.springframework.transaction.support.DefaultTransactionDefinition

All Implemented Interfaces:

Serializable, TransactionDefinition

Direct Known Subclasses:

DefaultTransactionAttribute, TransactionTemplate

public class DefaultTransactionDefinition
extends Object
implements TransactionDefinition, Serializable

Default implementation of the TransactionDefinition interface, offering bean-style configuration and sensible default values (PROPAGATION_REQUIRED, ISOLATION_DEFAULT, TIMEOUT_DEFAULT, readOnly=false).

Base class for both TransactionTemplate and DefaultTransactionAttribute.

Since:

08.05.2003

Author:

Juergen Hoeller

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	PREFIX_ISOLATION Prefix for the isolation constants defined in TransactionDefinition
static String	PREFIX_PROPAGATION Prefix for the propagation constants defined in TransactionDefinition
static String	PREFIX_TIMEOUT Prefix for transaction timeout values in description strings
static String	READ_ONLY_MARKER Marker for read-only transactions in description strings

Fields inherited from interface org.springframework.transaction.TransactionDefinition

ISOLATION_DEFAULT, ISOLATION_READ_COMMITTED, ISOLATION_READ_UNCOMMITTED, ISOLATION_REPEATABLE_READ, ISOLATION_SERIALIZABLE, PROPAGATION_MANDATORY, PROPAGATION_NESTED, PROPAGATION_NEVER, PROPAGATION_NOT_SUPPORTED, PROPAGATION_REQUIRED, PROPAGATION_REQUIRES_NEW, PROPAGATION_SUPPORTS, TIMEOUT_DEFAULT

Constructor Summary

Constructors

Constructor and Description
DefaultTransactionDefinition() Create a new DefaultTransactionDefinition, with default settings.
DefaultTransactionDefinition(int propagationBehavior) Create a new DefaultTransactionDefinition with the given propagation behavior.
DefaultTransactionDefinition(TransactionDefinition other) Copy constructor.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) This implementation compares the toString() results.
protected StringBuilder	getDefinitionDescription() Return an identifying description for this transaction definition.
int	getIsolationLevel() Return the isolation level.
String	getName() Return the name of this transaction.
int	getPropagationBehavior() Return the propagation behavior.
int	getTimeout() Return the transaction timeout.
int	hashCode() This implementation returns toString()'s hash code.
boolean	isReadOnly() Return whether to optimize as a read-only transaction.
void	setIsolationLevel(int isolationLevel) Set the isolation level.
void	setIsolationLevelName(String constantName) Set the isolation level by the name of the corresponding constant in TransactionDefinition, e.g.
void	setName(String name) Set the name of this transaction.
void	setPropagationBehavior(int propagationBehavior) Set the propagation behavior.
void	setPropagationBehaviorName(String constantName) Set the propagation behavior by the name of the corresponding constant in TransactionDefinition, e.g.
void	setReadOnly(boolean readOnly) Set whether to optimize as read-only transaction.
void	setTimeout(int timeout) Set the timeout to apply, as number of seconds.
String	toString() Return an identifying description for this transaction definition.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

PREFIX_PROPAGATION

public static final String PREFIX_PROPAGATION

Prefix for the propagation constants defined in TransactionDefinition

See Also:

Constant Field Values

PREFIX_ISOLATION

public static final String PREFIX_ISOLATION

Prefix for the isolation constants defined in TransactionDefinition

See Also:

Constant Field Values

PREFIX_TIMEOUT

public static final String PREFIX_TIMEOUT

Prefix for transaction timeout values in description strings

See Also:

Constant Field Values

READ_ONLY_MARKER

public static final String READ_ONLY_MARKER

Marker for read-only transactions in description strings

See Also:

Constant Field Values

Constructor Detail

DefaultTransactionDefinition

public DefaultTransactionDefinition()

Create a new DefaultTransactionDefinition, with default settings. Can be modified through bean property setters.

See Also:

setPropagationBehavior(int), setIsolationLevel(int), setTimeout(int), setReadOnly(boolean), setName(java.lang.String)

DefaultTransactionDefinition

public DefaultTransactionDefinition(TransactionDefinition other)

Copy constructor. Definition can be modified through bean property setters.

See Also:

setPropagationBehavior(int), setIsolationLevel(int), setTimeout(int), setReadOnly(boolean), setName(java.lang.String)

DefaultTransactionDefinition

public DefaultTransactionDefinition(int propagationBehavior)

Create a new DefaultTransactionDefinition with the given propagation behavior. Can be modified through bean property setters.

Parameters:

propagationBehavior - one of the propagation constants in the TransactionDefinition interface

See Also:

setIsolationLevel(int), setTimeout(int), setReadOnly(boolean)

Method Detail

setPropagationBehaviorName

public final void setPropagationBehaviorName(String constantName)
                                      throws IllegalArgumentException

Set the propagation behavior by the name of the corresponding constant in TransactionDefinition, e.g. "PROPAGATION_REQUIRED".

Parameters:

constantName - name of the constant

Throws:

IllegalArgumentException - if the supplied value is not resolvable to one of the PROPAGATION_ constants or is null

See Also:

setPropagationBehavior(int), TransactionDefinition.PROPAGATION_REQUIRED

setPropagationBehavior

public final void setPropagationBehavior(int propagationBehavior)

Set the propagation behavior. Must be one of the propagation constants in the TransactionDefinition interface. Default is PROPAGATION_REQUIRED.

Exclusively designed for use with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW since it only applies to newly started transactions. Consider switching the "validateExistingTransactions" flag to "true" on your transaction manager if you'd like isolation level declarations to get rejected when participating in an existing transaction with a different isolation level.

Note that a transaction manager that does not support custom isolation levels will throw an exception when given any other level than TransactionDefinition.ISOLATION_DEFAULT.

Throws:

IllegalArgumentException - if the supplied value is not one of the PROPAGATION_ constants

See Also:

TransactionDefinition.PROPAGATION_REQUIRED

getPropagationBehavior

public final int getPropagationBehavior()

Description copied from interface: TransactionDefinition

Return the propagation behavior.

Must return one of the PROPAGATION_XXX constants defined on this interface.

Specified by:

getPropagationBehavior in interface TransactionDefinition

Returns:

the propagation behavior

See Also:

TransactionDefinition.PROPAGATION_REQUIRED, TransactionSynchronizationManager.isActualTransactionActive()

setIsolationLevelName

public final void setIsolationLevelName(String constantName)
                                 throws IllegalArgumentException

Set the isolation level by the name of the corresponding constant in TransactionDefinition, e.g. "ISOLATION_DEFAULT".

Parameters:

constantName - name of the constant

Throws:

IllegalArgumentException - if the supplied value is not resolvable to one of the ISOLATION_ constants or is null

See Also:

setIsolationLevel(int), TransactionDefinition.ISOLATION_DEFAULT

setIsolationLevel

public final void setIsolationLevel(int isolationLevel)

Set the isolation level. Must be one of the isolation constants in the TransactionDefinition interface. Default is ISOLATION_DEFAULT.

Exclusively designed for use with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW since it only applies to newly started transactions. Consider switching the "validateExistingTransactions" flag to "true" on your transaction manager if you'd like isolation level declarations to get rejected when participating in an existing transaction with a different isolation level.

Note that a transaction manager that does not support custom isolation levels will throw an exception when given any other level than TransactionDefinition.ISOLATION_DEFAULT.

Throws:

IllegalArgumentException - if the supplied value is not one of the ISOLATION_ constants

See Also:

TransactionDefinition.ISOLATION_DEFAULT

getIsolationLevel

public final int getIsolationLevel()

Description copied from interface: TransactionDefinition

Return the isolation level.

Must return one of the ISOLATION_XXX constants defined on this interface. Those constants are designed to match the values of the same constants on Connection.

Exclusively designed for use with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW since it only applies to newly started transactions. Consider switching the "validateExistingTransactions" flag to "true" on your transaction manager if you'd like isolation level declarations to get rejected when participating in an existing transaction with a different isolation level.

Note that a transaction manager that does not support custom isolation levels will throw an exception when given any other level than TransactionDefinition.ISOLATION_DEFAULT.

Specified by:

getIsolationLevel in interface TransactionDefinition

Returns:

the isolation level

See Also:

TransactionDefinition.ISOLATION_DEFAULT, AbstractPlatformTransactionManager.setValidateExistingTransaction(boolean)

setTimeout

public final void setTimeout(int timeout)

Set the timeout to apply, as number of seconds. Default is TIMEOUT_DEFAULT (-1).

Exclusively designed for use with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW since it only applies to newly started transactions.

Note that a transaction manager that does not support timeouts will throw an exception when given any other timeout than TransactionDefinition.TIMEOUT_DEFAULT.

See Also:

TransactionDefinition.TIMEOUT_DEFAULT

getTimeout

public final int getTimeout()

Description copied from interface: TransactionDefinition

Return the transaction timeout.

Must return a number of seconds, or TransactionDefinition.TIMEOUT_DEFAULT.

Exclusively designed for use with TransactionDefinition.PROPAGATION_REQUIRED or TransactionDefinition.PROPAGATION_REQUIRES_NEW since it only applies to newly started transactions.

Note that a transaction manager that does not support timeouts will throw an exception when given any other timeout than TransactionDefinition.TIMEOUT_DEFAULT.

Specified by:

getTimeout in interface TransactionDefinition

Returns:

the transaction timeout

setReadOnly

public final void setReadOnly(boolean readOnly)

Set whether to optimize as read-only transaction. Default is "false".

The read-only flag applies to any transaction context, whether backed by an actual resource transaction (TransactionDefinition.PROPAGATION_REQUIRED/ TransactionDefinition.PROPAGATION_REQUIRES_NEW) or operating non-transactionally at the resource level (TransactionDefinition.PROPAGATION_SUPPORTS). In the latter case, the flag will only apply to managed resources within the application, such as a Hibernate Session.

This just serves as a hint for the actual transaction subsystem; it will not necessarily cause failure of write access attempts. A transaction manager which cannot interpret the read-only hint will not throw an exception when asked for a read-only transaction.

isReadOnly

public final boolean isReadOnly()

Description copied from interface: TransactionDefinition

Return whether to optimize as a read-only transaction.

The read-only flag applies to any transaction context, whether backed by an actual resource transaction (TransactionDefinition.PROPAGATION_REQUIRED/ TransactionDefinition.PROPAGATION_REQUIRES_NEW) or operating non-transactionally at the resource level (TransactionDefinition.PROPAGATION_SUPPORTS). In the latter case, the flag will only apply to managed resources within the application, such as a Hibernate Session.

This just serves as a hint for the actual transaction subsystem; it will not necessarily cause failure of write access attempts. A transaction manager which cannot interpret the read-only hint will not throw an exception when asked for a read-only transaction.

Specified by:

isReadOnly in interface TransactionDefinition

Returns:

true if the transaction is to be optimized as read-only

See Also:

TransactionSynchronization.beforeCommit(boolean), TransactionSynchronizationManager.isCurrentTransactionReadOnly()

setName

public final void setName(String name)

Set the name of this transaction. Default is none.

This will be used as transaction name to be shown in a transaction monitor, if applicable (for example, WebLogic's).

getName

public final String getName()

Description copied from interface: TransactionDefinition

Return the name of this transaction. Can be null.

This will be used as the transaction name to be shown in a transaction monitor, if applicable (for example, WebLogic's).

In case of Spring's declarative transactions, the exposed name will be the fully-qualified class name + "." + method name (by default).

Specified by:

getName in interface TransactionDefinition

Returns:

the name of this transaction

See Also:

TransactionAspectSupport, TransactionSynchronizationManager.getCurrentTransactionName()

equals

public boolean equals(Object other)

This implementation compares the toString() results.

Overrides:

equals in class Object

See Also:

toString()

hashCode

public int hashCode()

This implementation returns toString()'s hash code.

Overrides:

hashCode in class Object

See Also:

toString()

toString

public String toString()

Return an identifying description for this transaction definition.

The format matches the one used by TransactionAttributeEditor, to be able to feed toString results into bean properties of type TransactionAttribute.

Has to be overridden in subclasses for correct equals and hashCode behavior. Alternatively, equals(java.lang.Object) and hashCode() can be overridden themselves.

Overrides:

toString in class Object

See Also:

getDefinitionDescription(), TransactionAttributeEditor

getDefinitionDescription

protected final StringBuilder getDefinitionDescription()

Return an identifying description for this transaction definition.

Available to subclasses, for inclusion in their toString() result.