CosTransactions_Resource - Online Linux Manual PageSection : 3
Updated : cosTransactions 5.0
Source : Ericsson AB
Note : Erlang Module Definition
NAMECosTransactions_Resource − This module implements the OMG CosTransactions::Resource interface.
DESCRIPTIONTo get access to the record definitions for the structures use:
-include_lib("cosTransactions/include/CosTransactions.hrl").
EXPORTScommit(Resource) -> Return
Types: Resource = #objref
Return = ok | {'EXCEPTION', E}
E = #'CosTransactions_NotPrepared'{} | #'CosTransactions_HeuristicRollback'{} | #'CosTransactions_HeuristicMixed'{} | #'CosTransactions_HeuristicHazard'{}
This operation instructs the Resource to commit all changes made as a part of the transaction. The Resource can raise: * Heuristic Exception - if a Heuristic decision is made which differ from the true outcome of the transaction. The Resource must remember the Heuristic outcome until the forget operation is performed. commit_one_phase(Resource) -> Return
Types: Resource = #objref
Return = ok | {'EXCEPTION', E}
E = #'CosTransactions_HeuristicHazard'{} | #'CosTransactions_TransactionRolledBack'{}
If possible, the Resource should commit all changes made as part of the transaction, else it should raise the TRANSACTION_ROLLEDBACK exception. This operation can only be used if the Resource is the only child of its parent. forget(Resource) -> Return
Types: Resource = #objref
Return = ok
This operation informs the Resource that it is safe to forget any Heuristic decisions and the knowledge of the transaction. prepare(Resource) -> Return
Types: Resource = #objref
Return = Vote | {'EXCEPTION', E}
Vote = 'VoteReadOnly' | 'VoteCommit' | 'VoteRollback'
E = #'CosTransactions_HeuristicMixed'{} | #'CosTransactions_HeuristicHazard'{}
This operation is invoked on the Resource to begin the two-phase commit protocol. The Resource can reply: * 'VoteReadOnly' - if no persistent data has been modified by the transaction. The Resource can forget all knowledge of the transaction. * 'VoteCommit' - if the Resource has been prepared and is able to write all the data needed to commit the transaction to stable storage. * 'VoteRollback' - under any circumstances but must do so if none of the alternatives above are applicable. * Heuristic Exception - if a Heuristic decision is made which differ from the true outcome of the transaction. The Resource must remember the Heuristic outcome until the forget operation is performed. rollback(Resource) -> Return
Types: Resource = #objref
Return = ok | {'EXCEPTION', E}
E = #'CosTransactions_HeuristicCommit'{} | #'CosTransactions_HeuristicMixed'{} | #'CosTransactions_HeuristicHazard'{}
This operation instructs the Resource to rollback all changes made as a part of the transaction. The Resource can raise: * Heuristic Exception - if a Heuristic decision is made which differ from the true outcome of the transaction. The Resource must remember the Heuristic outcome until the forget operation is performed. 0
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