> tibemsAcknowledgeMode
> Type
> Purpose
> Define acknowledgement mode constants.

> Constant | Description
> TIBEMS_AUTO_ACKNOWLEDGE | In this mode, the session automatically acknowledges a message when message processing is finished—that is, when either of these calls returns successfully:
> ● | synchronous receive calls (such as tibemsMsgConsumer_Receive on page 168)
> ● | asynchronous listener callback (namely, tibemsMsgCallback on page 172)
> TIBEMS_CLIENT_ACKNOWLEDGE | In this mode, the client program acknowledges receipt by calling tibemsMsg_Acknowledge on page 24. Each call acknowledges all messages received so far.
> TIBEMS_DUPS_OK_ACKNOWLEDGE | 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.
> TIBEMS_EXPLICIT_CLIENT_ACKNOWLEDGE | As with TIBEMS_CLIENT_ACKNOWLEDGE, the client program acknowledges receipt by calling tibemsMsg_Acknowledge on page 24. 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.
> TIBEMS_EXPLICIT_CLIENT_DUPS_OK_ACKNOWLEDGE | In this mode, the client program lazily acknowledges only the individual message, by calling tibemsMsg_Acknowledge on page 24. 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.
> TIBEMS_NO_ACKNOWLEDGE | 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.

> COBOL
> 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.

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