org.alfresco.repo.transaction

Class TransactionServiceImpl

java.lang.Object

org.alfresco.repo.transaction.TransactionServiceImpl

All Implemented Interfaces:

TransactionService

Direct Known Subclasses:

FileTransferReceiverTransactionServiceImpl

public class TransactionServiceImpl
extends Object
implements TransactionService

Default implementation of Transaction Service.

Default retry behaviour: see RetryingTransactionHelper.RetryingTransactionHelper()

Author:

David Caruana

Constructor Summary

Constructors

Constructor and Description
TransactionServiceImpl() Construct defaults

Method Summary

Modifier and Type	Method and Description
boolean	getAllowWrite() Determine if the repository has been put into read only mode.
UserTransaction	getNonPropagatingUserTransaction() Gets a user transaction that ensures a new transaction is created.
UserTransaction	getNonPropagatingUserTransaction(boolean readOnly) Gets a user transaction that ensures a new transaction is created.
UserTransaction	getNonPropagatingUserTransaction(boolean readOnly, boolean ignoreSystemReadOnly) Gets a user transaction that ensures a new transaction is created.
RetryingTransactionHelper	getRetryingTransactionHelper() Creates a new helper instance.
UserTransaction	getUserTransaction() Gets a user transaction that supports transaction propagation.
UserTransaction	getUserTransaction(boolean readOnly) Gets a user transaction that supports transaction propagation.
UserTransaction	getUserTransaction(boolean readOnly, boolean ignoreSystemReadOnly) Gets a user transaction that supports transaction propagation.
boolean	isReadOnly() Determine if ALL user transactions will be read-only.
void	setAllowWrite(boolean allowWrite) Set the read-only mode for all generated transactions.
void	setAllowWrite(boolean allowWrite, org.alfresco.service.namespace.QName nameOfVeto) Set the read-only mode for all generated transactions.
void	setMaxRetries(int maxRetries)
void	setMaxRetryWaitMs(int maxRetryWaitMs)
void	setMinRetryWaitMs(int minRetryWaitMs)
void	setRetryWaitIncrementMs(int retryWaitIncrementMs)
void	setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager) Set the transaction manager to use

Methods inherited from class java.lang.Object

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

Constructor Detail

TransactionServiceImpl

public TransactionServiceImpl()

Construct defaults

Method Detail

setTransactionManager

public void setTransactionManager(org.springframework.transaction.PlatformTransactionManager transactionManager)

Set the transaction manager to use

getAllowWrite

public boolean getAllowWrite()

Determine if the repository has been put into read only mode. This is independent of the current user.

Specified by:

getAllowWrite in interface TransactionService

Returns:

true if the repository is allowed to perform write operations

setAllowWrite

public void setAllowWrite(boolean allowWrite)

Set the read-only mode for all generated transactions.

Intended for use by spring configuration only. Alfresco code should call the method which specifies a veto name.

Parameters:

allowWrite - false if all transactions must be read-only

setAllowWrite

public void setAllowWrite(boolean allowWrite,
                          org.alfresco.service.namespace.QName nameOfVeto)

Set the read-only mode for all generated transactions.

By default read/write transactions are allowed however vetos may be applied that make the transactions read only.

Prevent writes by calling allowWrite with false and a given veto name.

The veto is removed by calling allowWrite with true for the given veto name when all vetos are removed then read/write transactions are allowed.

Parameters:

allowWrite - false if all transactions must be read-only

nameOfVeto - the name of the veto

isReadOnly

public boolean isReadOnly()

Determine if ALL user transactions will be read-only. The 'System' user is always allowed to write.

Specified by:

isReadOnly in interface TransactionService

Returns:

Returns true if all transactions are read-only AND the current user is not the 'System' user.

setMaxRetries

public void setMaxRetries(int maxRetries)

See Also:

RetryingTransactionHelper.setMaxRetries(int)

setMinRetryWaitMs

public void setMinRetryWaitMs(int minRetryWaitMs)

See Also:

RetryingTransactionHelper.setMinRetryWaitMs(int)

setMaxRetryWaitMs

public void setMaxRetryWaitMs(int maxRetryWaitMs)

See Also:

RetryingTransactionHelper.setMaxRetryWaitMs(int)

setRetryWaitIncrementMs

public void setRetryWaitIncrementMs(int retryWaitIncrementMs)

See Also:

RetryingTransactionHelper.setRetryWaitIncrementMs(int)

getUserTransaction

public UserTransaction getUserTransaction()

Description copied from interface: TransactionService

Gets a user transaction that supports transaction propagation. This is like the EJB REQUIRED transaction attribute.

Specified by:

getUserTransaction in interface TransactionService

Returns:

the user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRED

getUserTransaction

public UserTransaction getUserTransaction(boolean readOnly)

Description copied from interface: TransactionService

Gets a user transaction that supports transaction propagation. This is like the EJB REQUIRED transaction attribute.

Specified by:

getUserTransaction in interface TransactionService

Parameters:

readOnly - Set true for a READONLY transaction instance, false otherwise. Note that it is not always possible to force a write transaction if the system is in read-only mode.

Returns:

the user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRED

getUserTransaction

public UserTransaction getUserTransaction(boolean readOnly,
                                          boolean ignoreSystemReadOnly)

Description copied from interface: TransactionService

Gets a user transaction that supports transaction propagation. This is like the EJB REQUIRED transaction attribute.

Specified by:

getUserTransaction in interface TransactionService

Parameters:

readOnly - Set true for a READONLY transaction instance, false otherwise.

ignoreSystemReadOnly - true to force the read-only flag to be respected regardless of the system read-only mode.

Returns:

the user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRED

getNonPropagatingUserTransaction

public UserTransaction getNonPropagatingUserTransaction()

Description copied from interface: TransactionService

Gets a user transaction that ensures a new transaction is created. Any enclosing transaction is not propagated. This is like the EJB REQUIRES_NEW transaction attribute - when the transaction is started, the current transaction will be suspended and a new one started.

Specified by:

getNonPropagatingUserTransaction in interface TransactionService

Returns:

Returns a non-propagating user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRES_NEW

getNonPropagatingUserTransaction

public UserTransaction getNonPropagatingUserTransaction(boolean readOnly)

Description copied from interface: TransactionService

Gets a user transaction that ensures a new transaction is created. Any enclosing transaction is not propagated. This is like the EJB REQUIRES_NEW transaction attribute - when the transaction is started, the current transaction will be suspended and a new one started.

Specified by:

getNonPropagatingUserTransaction in interface TransactionService

Parameters:

readOnly - Set true for a READONLY transaction instance, false otherwise. Note that it is not always possible to force a write transaction if the system is in read-only mode.

Returns:

Returns a non-propagating user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRES_NEW

getNonPropagatingUserTransaction

public UserTransaction getNonPropagatingUserTransaction(boolean readOnly,
                                                        boolean ignoreSystemReadOnly)

Description copied from interface: TransactionService

Gets a user transaction that ensures a new transaction is created. Any enclosing transaction is not propagated. This is like the EJB REQUIRES_NEW transaction attribute - when the transaction is started, the current transaction will be suspended and a new one started.

Specified by:

getNonPropagatingUserTransaction in interface TransactionService

Parameters:

readOnly - Set true for a READONLY transaction instance, false otherwise.

ignoreSystemReadOnly - true to force the read-only flag to be respected regardless of the system read-only mode.

Returns:

Returns a non-propagating user transaction

See Also:

TransactionDefinition.PROPAGATION_REQUIRES_NEW

getRetryingTransactionHelper

public RetryingTransactionHelper getRetryingTransactionHelper()

Creates a new helper instance. It can be reused or customized by the client code: each instance is new and initialized afresh.

Specified by:

getRetryingTransactionHelper in interface TransactionService

Returns:

Returns a helper object that executes units of work transactionally. The helper can be reused or altered as required.