Note– For Delayed ACK, the Receiver and Forwarder must be on the same integration
server.
MessageVerication
Theonly verication that the outbound Adapter does is to ensure that the message parses into
thegeneric Event Message Library, and that the MSH uses the correct elds. The acknowledge is
veriedto ensure that the sent message is valid.
AcknowledgmentProcessing
■AdapterGenerates HL7 Acknowledgment
Inthis scenario, the Adapter generates an HL7 ACK after receiving and successfully storing
themessage in a queue; otherwise, it generates an HL7 NAK. The HL7 ACK or NAK is
placedin the proper envelope and sent to the external system.
■ESBSends HL7 Acknowledgement
Inthis scenario, the Adapter acts as a sender in a Delayed ACK scenario, as described in
“DelayedACK Mode” on page 13.
■CannedHL7 NAK
ACanned HL7 NAK is created when a read error occurs, or when an message cannot be
identiedas an HL7 message. The initial test ensures that the message conforms to the
lower-layerprotocol. The Resource Adapter uses the MSH section parameters to create an
appropriateNAK.
RecourseActions
Recourseactions can be congured for the outbound Adapter for the following conditions:
■TheAdapter sends the maximum number of canned negative acknowledgments.
■TheAdapter attempts to read data the maximum number of times from the external system
aftera read or receive operation returns nothing.
■TheAdapter receives the maximum number of negative acknowledgments.
■HL7message validation fails prior to the sending of the HL7 message to the external system.
■TheAdapter reaches the maximum number of response timeouts while waiting for data
fromthe external system.
■TheAdapter receives an HL7 Application NAK from the external system.
■TheAdapter waits for a response from the external system for the congured amount of
time(in milliseconds).
Formore information on the available recourse actions, see “Recourse Actions” on page 21.
SunAdapterfor TCP/IP HL7 Overview
SunAdapterfor TCP/IP HL7 User's Guide 19