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Tian (guest)
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| 09/05/2008 2:30 PM |
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Hi,
Is this the correct way (in that order) to request symbol mapping from the retran channel?
1. connect to retran tcp channel.
2. wait for heartbeat and process it
3. send symbol mapping request
4. process the symbol mapping response from the retran channel
5. wait for one more heartbeat which indicate the end of symbol mapping response
Right now I am not getting any initial heardbeat (i.e. my feed handler stuck in step 2 waiting and eventually got disconnected by the retran channel).
I couldn't find this information in the ultra openbook spec.
Your advice is greatly appreciated.
thanks,
Ye |
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Verona
Posts:59
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| 09/08/2008 2:38 PM |
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Proprietary Data does not send a heartbeat immediately on establishing the TCP connection. The heartbeat (and its response) is optional and you should submit the request right away upon connecting to the retrans request port. The heartbeat will be sent out periodically (if you do not close the connection) in order to aid our clients to detect connection loss on inactive connections.
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Tian (guest)
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| 09/08/2008 2:55 PM |
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Thanks... How do I know I've received symbol mappings for all stocks (i.e. detect the end of the transmission for symbol mapping)?
In ARCA Book protocol, we've got an initial heardbeat, then request the symbol mapping, then the next hearbeat message would indicate the end of symbol mapping transmission.
thanks,
Ye |
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