apache::geode::client::CacheTransactionManager Class Reference

An interface for objects who perform transaction management. More...

Public Member Functions
virtual void	begin ()=0
	Creates a new transaction and associates it with the current thread. More...
virtual void	commit ()=0
	Commit the transaction associated with the current thread. More...
virtual bool	exists ()=0
	Reports the existence of a Transaction for this thread. More...
virtual bool	exists (TransactionId &transactionId)=0
	Reports the existence of a transaction for the given transactionId. More...
virtual TransactionId &	getTransactionId ()=0
	Returns the transaction identifier for the current thread. More...
virtual bool	isSuspended (TransactionId &transactionId)=0
	This method can be used to determine if a transaction with the given transaction identifier is currently suspended locally. More...
virtual void	resume (TransactionId &transactionId)=0
	On the current thread, resumes a transaction that was previously suspended using suspend(). More...
virtual void	rollback ()=0
	Roll back the transaction associated with the current thread. More...
virtual TransactionId &	suspend ()=0
	Suspends the transaction on the current thread. More...
virtual bool	tryResume (TransactionId &transactionId)=0
	On the current thread, resumes a transaction that was previously suspended using suspend(). More...
virtual bool	tryResume (TransactionId &transactionId, std::chrono::milliseconds waitTime)=0
	On the current thread, resumes a transaction that was previously suspended using suspend(), or waits for the specified timeout interval if the transaction has not been suspended. More...

Detailed Description

An interface for objects who perform transaction management.

Member Function Documentation

begin()

virtual void apache::geode::client::CacheTransactionManager::begin ( )

pure virtual

Creates a new transaction and associates it with the current thread.

Exceptions

IllegalStateException

if the thread is already associated with a transaction

Since

3.6

commit()

virtual void apache::geode::client::CacheTransactionManager::commit ( )

pure virtual

Commit the transaction associated with the current thread.

If the commit operation fails due to a conflict it will destroy the transaction state and throw a {}. If the commit operation succeeds, it returns after the transaction state has been merged with committed state. When this method completes, the thread is no longer associated with a transaction. IllegalStateException if the thread is not associated with a transaction CommitConflictException if the commit operation fails due to a write conflict. TransactionDataNodeHasDepartedException if the node hosting the transaction data has departed. This is only relevant for transaction that involve PartitionedRegions. TransactionDataNotColocatedException if at commit time, the data involved in the transaction has moved away from the transaction hosting node. This can only happen if rebalancing/recovery happens during a transaction that involves a PartitionedRegion. TransactionInDoubtException when Geode cannot tell which nodes have applied the transaction and which have not. This only occurs if nodes fail mid-commit, and only then in very rare circumstances.

exists() [1/2]

virtual bool apache::geode::client::CacheTransactionManager::exists ( )

pure virtual

Reports the existence of a Transaction for this thread.

Returns

true if a transaction exists, false otherwise

Since

3.6

exists() [2/2]

virtual bool apache::geode::client::CacheTransactionManager::exists ( TransactionId &  transactionId )

pure virtual

Reports the existence of a transaction for the given transactionId.

This method can be used to determine if a transaction with the given transaction identifier is currently in progress locally.

Parameters

transactionId

the given transaction identifier

Returns

true if the transaction is in progress, false otherwise.

Since

3.6.2

See also

#isSuspended(TransactionId)

getTransactionId()

virtual TransactionId& apache::geode::client::CacheTransactionManager::getTransactionId ( )

pure virtual

Returns the transaction identifier for the current thread.

Returns

the transaction identifier or null if no transaction exists

Since

3.6.2

isSuspended()

virtual bool apache::geode::client::CacheTransactionManager::isSuspended ( TransactionId &  transactionId )

pure virtual

This method can be used to determine if a transaction with the given transaction identifier is currently suspended locally.

This method does not check other members for transaction status.

Parameters

transactionId

Returns

true if the transaction is in suspended state, false otherwise

Since

3.6.2

See also

#exists(TransactionId)

resume()

virtual void apache::geode::client::CacheTransactionManager::resume ( TransactionId &  transactionId )

pure virtual

On the current thread, resumes a transaction that was previously suspended using suspend().

Parameters

transactionId

the transaction to resume

Exceptions

IllegalStateException

if the thread is associated with a transaction or if isSuspended(TransactionId) would return false for the given transactionId

Since

3.6.2

rollback()

virtual void apache::geode::client::CacheTransactionManager::rollback ( )

pure virtual

Roll back the transaction associated with the current thread.

When this method completes, the thread is no longer associated with a transaction and the transaction context is destroyed.

Since

3.6

Exceptions

IllegalStateException

if the thread is not associated with a transaction

suspend()

virtual TransactionId& apache::geode::client::CacheTransactionManager::suspend ( )

pure virtual

Suspends the transaction on the current thread.

All subsequent operations performed by this thread will be non-transactional. The suspended transaction can be resumed by calling resume(TransactionId)

Returns

the transaction identifier of the suspended transaction or null if the thread was not associated with a transaction

Since

3.6.2

tryResume() [1/2]

virtual bool apache::geode::client::CacheTransactionManager::tryResume ( TransactionId &  transactionId )

pure virtual

On the current thread, resumes a transaction that was previously suspended using suspend().

This method is equivalent to

if (isSuspended(txId)) {
  resume(txId);
}

except that this action is performed atomically

Parameters

transactionId

the transaction to resume

Returns

true if the transaction was resumed, false otherwise

Since

3.6.2

tryResume() [2/2]

virtual bool apache::geode::client::CacheTransactionManager::tryResume ( TransactionId &  transactionId, std::chrono::milliseconds  waitTime  )

pure virtual

On the current thread, resumes a transaction that was previously suspended using suspend(), or waits for the specified timeout interval if the transaction has not been suspended.

This method will return if:

• Another thread suspends the transaction
• Another thread calls commit/rollback on the transaction
• This thread has waited for the specified timeout

This method returns immediately if exists(TransactionId) returns false.

Parameters

transactionId	the transaction to resume
waitTime	the maximum time to wait

Returns

true if the transaction was resumed, false otherwise

Since

3.6.2

See also

#tryResume(TransactionId)