Type
Define acknowledgement mode constants.
Constant
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Description
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TIBEMS_
AUTO_ACKNOWLEDGE
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In this mode, the session automatically acknowledges a message when message processing is finishedthat is, when either of these calls returns successfully:
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TIBEMS_
CLIENT_ACKNOWLEDGE
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In this mode, the client program acknowledges receipt by calling
tibemsMsg_Acknowledge . Each call acknowledges all messages received so far.
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TIBEMS_
DUPS_OK_ACKNOWLEDGE
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As with
TIBEMS_AUTO_ACKNOWLEDGE , the session automatically acknowledges messages. However, it may do so lazily.
Lazy means that the provider client library can delay transferring the acknowledgement to the server until a convenient time; meanwhile the server might redeliver the message. Lazy acknowledgement can reduce session overhead.
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TIBEMS_
EXPLICIT_CLIENT_ACKNOWLEDGE
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As with
TIBEMS_CLIENT_ACKNOWLEDGE , the client program acknowledges receipt by calling tibemsMsg_Acknowledge . However, each call acknowledges only the individual message. The client may acknowledge messages in any order.
This mode and behavior are proprietary extensions, specific to TIBCO EMS.
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TIBEMS_
EXPLICIT_CLIENT_DUPS_OK_ACKNOWLEDGE
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In this mode, the client program lazily acknowledges only the individual message, by calling
tibemsMsg_Acknowledge . The client may acknowledge messages in any order.
Lazy means that the provider client library can delay transferring the acknowledgement to the server until a convenient time; meanwhile the server might redeliver the message.
This mode and behavior are proprietary extensions, specific to TIBCO EMS.
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TIBEMS_
NO_ACKNOWLEDGE
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In TIBEMS_
NO_ACKNOWLEDGE mode, messages do not require acknowledgement (which reduces message overhead). The server never redelivers messages.
This mode is available for topic sessions only.
This mode and behavior are proprietary extensions, specific to TIBCO EMS.
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01 TIBEMS-ACKNOWLEDGE-MODES. 05 TIBEMS-AUTO-ACKNOWLEDGE PIC S9(8) COMP VALUE 1. 05 TIBEMS-CLIENT-ACKNOWLEDGE PIC S9(8) COMP VALUE 2. 05 TIBEMS-DUPS-OK-ACKNOWLEDGE PIC S9(8) COMP VALUE 3. 05 TIBEMS-NO-ACKNOWLEDGE PIC S9(8) COMP VALUE 22. 05 TIBEMS-EXPLICIT-CL-ACK PIC S9(8) COMP VALUE 23. 05 TIBEMS-EXPLICIT-CL-DUPS-OK-ACK PIC S9(8) COMP VALUE 24.
TIBCO Enterprise Message Service™ C and COBOL Reference System Release 4.3, February 2006 Copyright © TIBCO Software Inc. All rights reserved www.tibco.com |