Computer Hardware User Manual

Note – For Delayed ACK, the Receiver and Forwarder must be on the same integration
server.
Message Verication
The only verication that the outbound Adapter does is to ensure that the message parses into
the generic Event Message Library, and that the MSH uses the correct elds. The acknowledge is
veried to ensure that the sent message is valid.
Acknowledgment Processing
■
Adapter Generates HL7 Acknowledgment
In this scenario, the Adapter generates an HL7 ACK after receiving and successfully storing
the message in a queue; otherwise, it generates an HL7 NAK. The HL7 ACK or NAK is
placed in the proper envelope and sent to the external system.
■
ESB Sends HL7 Acknowledgement
In this scenario, the Adapter acts as a sender in a Delayed ACK scenario, as described in
“Delayed ACK Mode” on page 13.
■
Canned HL7 NAK
A Canned HL7 NAK is created when a read error occurs, or when an message cannot be
identied as an HL7 message. The initial test ensures that the message conforms to the
lower-layer protocol. The Resource Adapter uses the MSH section parameters to create an
appropriate NAK.
Recourse Actions
Recourse actions can be congured for the outbound Adapter for the following conditions:
■
The Adapter sends the maximum number of canned negative acknowledgments.
■
The Adapter attempts to read data the maximum number of times from the external system
after a read or receive operation returns nothing.
■
The Adapter receives the maximum number of negative acknowledgments.
■
HL7 message validation fails prior to the sending of the HL7 message to the external system.
■
The Adapter reaches the maximum number of response timeouts while waiting for data
from the external system.
■
The Adapter receives an HL7 Application NAK from the external system.
■
The Adapter waits for a response from the external system for the congured amount of
time (in milliseconds).
For more information on the available recourse actions, see
“Recourse Actions” on page 21.
Sun Adapter for TCP/IP HL7 Overview
Sun Adapter for TCP/IP HL7 User's Guide 19