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Page Revision: 2012/09/06 15:17

Session Integrity Check

Test Request messages forces a response from the counterparty to acknowledge a continuation of FIX Session connectivity. Test requests can occur at any time during the FIX Session. When a test request is received, the party is obligated to respond to the Test Request message with a Heartbeat. Such heartbeat must also contain the TestRequestID (Tag 112) that originated in the original Test Request message.

Test Request messages also provide an opportunity to check for out-of-sequence conditions. It permits checking for the expected outgoing sequence number (Tag 34 of the Test Request) and expected incoming sequence number (Tag 34 of the mandatory hearbeat response).

The TestRequestID (Tag 112) can be text of any form. An unique string is recommended (e.g. an instantenous time label) for pairing Test Requests to their corresponding Heartbeat messages.

Message Dictionary

Tag	Field Name	Req'd	Comments
	Standard Header	Y	MsgType = 1
112	TestReqID	N	Required when the heartbeat is the result of a Test Request message
	Standard Trailer	Y

Sample Messages


Test Request generated by the client:

34=123|49=test|56=T4Test|50=TraderName|52=20120905-18:09:12.103|112=treqid.09.05.2012-13.09.12|
[FIXTESTREQUEST]
[MsgSeqNum] 34 = 123
[SenderCompID] 49 = test
[TargetCompID] 56 = T4Test
[SenderSubID] 50 = TraderName
[SendingTime] 52 = 20120905-18:09:12.103
[TestReqID] 112 = treqid.09.05.2012-13.09.12

T4 API Server Heartbeat response to the Client Test Request

34=72|49=T4Test|56=test|50=T4FIX|52=20120905-18:09:12.119|112=treqid.09.05.2012-13.09.12|
[FIXHEARTBEAT]
[MsgSeqNum] 34 = 72
[SenderCompID] 49 = T4Test
[TargetCompID] 56 = test
[SenderSubID] 50 = T4FIX
[SendingTime] 52 = 20120905-18:09:12.119
[TestReqID] 112 = treqid.09.05.2012-13.09.12

Test Request generated by the T4 API Server:

34=122|49=T4Test|56=test|50=T4FIX|52=20120905-18:34:21.398|112=cts-20120905-18:34:21.398|
[FIXTESTREQUEST]
[MsgSeqNum] 34 = 122
[SenderCompID] 49 = T4Test
[TargetCompID] 56 = test
[SenderSubID] 50 = T4FIX
[SendingTime] 52 = 20120905-18:34:21.398
[TestReqID] 112 = cts-20120905-18:34:21.398

Client Heartbeat response to the T4 API Server Test Request

34=173|49=test|56=T4Test|52=20120905-18:34:36.436|112=cts-20120905-18:34:21.398|
[FIXHEARTBEAT]
[MsgSeqNum] 34 = 173
[SenderCompID] 49 = test
[TargetCompID] 56 = T4Test
[SendingTime] 52 = 20120905-18:34:36.436
[TestReqID] 112 = cts-20120905-18:34:21.398

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Page History: Test Request

Page Revision: 2012/09/06 15:17

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