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CosTransactions_Coordinator

This module implements the OMG CosTransactions::Coordinator interface.

To get access to the record definitions for the structures use:
-include_lib("cosTransactions/include/CosTransactions.hrl").

create_subtransaction(Coordinator) -> Control

Types:

Coordinator = #objref
Control = #objref

A new subtransaction is created whose parent is the Coordinator argument.

Raises exception:

*
'SubtransactionsUnavailable' - if nested transactions are not supported.
*
'Inactive' - if target transaction has already been prepared.

get_transaction_name(Coordinator) -> Name

Types:

Coordinator = #objref
Name = string() of type "oe_name@machine_type_timestamp"

Returns a printable string, which describe the transaction. The main purpose is to support debugging.

get_parent_status(Coordinator) -> Status

Types:

Coordinator = #objref
Status = atom()

Returns the status of the parent transaction associated with the target object. If the target object is a top-level transaction this operation is equivalent to get_status/1 operation.

Possible Status replies:

*
'StatusCommitted'
*
'StatusCommitting'
*
'StatusMarkedRollback'
*
'StatusRollingBack'
*
'StatusRolledBack'
*
'StatusActive'
*
'StatusPrepared'
*
'StatusUnknown'
*
'StatusNoTransaction'
*
'StatusPreparing'

get_status(Coordinator) -> Status

Types:

Coordinator = #objref
Status = atom()

Returns the status of the transaction associated with the target object.

get_top_level_status(Coordinator) -> Status

Types:

Coordinator = #objref
Status = atom()

Returns the status of the top-level transaction associated with the target object.

hash_top_level_tran(Coordinator) -> Return

Types:

Coordinator = #objref
Return = integer()

Returns a hash code for the top-level transaction associated with the target object. Equals the operation hash_transaction/1 if the target object is a top-level transaction.

hash_transaction(Coordinator) -> Return

Types:

Coordinator = #objref
Return = integer()

Returns a hash code for the transaction associated with the target object.

is_descendant_transaction(Coordinator, OtherCoordinator) -> Return

Types:

Coordinator = #objref
OtherCoordinator = #objref
Return = Boolean

Returns true if the transaction associated with the target object is a descendant of the transaction associated with the parameter object.

is_same_transaction(Coordinator, OtherCoordinator) -> Return

Types:

Coordinator = #objref
OtherCoordinator = #objref
Return = Boolean

Returns true if the transaction associated with the target object is related to the transaction associated with the parameter object.

is_top_level_transaction(Coordinator) -> Return

Types:

Coordinator = #objref
Return = Boolean

Returns true if the transaction associated with the target object is a top-level transaction.

register_resource(Coordinator, Resource) -> RecoveryCoordinator

Types:

Coordinator = #objref
Resource = #objref
RecoveryCoordinator = #objref

This operation registers the parameter Resource object as a participant in the transaction associated with the target object. The RecoveryCoordinator returned by this operation can be used by this Resource during recovery.

Note:
The Resources will be called in FIFO-order when preparing or committing. Hence, be sure to register the Resources in the correct order.

Raises exception:

*
'Inactive' - if target transaction has already been prepared.

register_subtran_aware(Coordinator, SubtransactionAwareResource) -> Return

Types:

Coordinator = #objref
Return = ok

This operation registers the parameter SubtransactionAwareResource object such that it will be notified when the transaction, associated wit the target object, has committed or rolled back.

Note:
The Resources will be called in FIFO-order. Hence, be sure to register the Resources in the correct order.

rollback_only(Coordinator) -> Return

Types:

Coordinator = #objref
Return = ok

The transaction associated with the target object is modified so the only possible outcome is to rollback the transaction.