Broker 10.5 | webMethods Broker Documentation | webMethods Broker Client C API Programmer's Guide | Transactional Client Processing with Adapters | Using Transaction Processing | Beginning a Transaction
Beginning a Transaction
Transaction Level Negotiation
Multiple Participants
Requesting Acknowledgment
Publishing Events within a Transaction
Ending a Transaction
Use the awBeginTransaction method to begin the transaction. This function publishes an Adapter::beginTransaction event, so your Broker client must have permission to publish this event. The function requires the following parameters:
*The transaction ID.
*The desired transaction level.
*A list of client identifiers for all the Broker clients that are allowed to interact with events in the transaction. This list can be NULL if you want all subscribers to participate in the transaction.
*An area where a tag field can be returned. If your Broker client does not wish to receive an acknowledgment event for the Adapter::beginTransaction event that is to about be published, this parameter should set to NULL.
Example of invoking the awBeginTransaction function
BrokerClient c;
BrokerError err;
char **transId;
int transTag;
. . .
// Obtain a transaction id.
. . .
// Begin the transaction
err = awBeginTransaction( c, transId, AW_TRANSACTION_LEVEL_BASIC,
0, NULL, &transTag);
if (err != AW_NO_ERROR) {
printf("Error beginning transaction\n%s\n",
return 0;
. . .