|MessageEventArgs||Table of Content||BlockSequenceNumber Property|
The MessageEventArgs<OnixS::ICE::iMpact::MarketData::MarketStateChange> type exposes the following members.
Sequence number of message block.
Bundle marker. This field is true if messages has been received within bundle (see MarketStateChange).
Processing latency in microseconds.
Number of messages in message block.
Time when the UDP packet was received by Handler.
DateTime object created using number of milliseconds since Jan 1st, 1970, 00:00:00 GMT.
Each message is assigned a sequence number that increases monotonically on the server side. To save bandwidth, the sequence number is a field in the block header, instead of every message. The sequence number for the first message is used in the header, and the client is expected to derive the sequence numbers for subsequent messages in the block. In the case of a heartbeat which includes only header in the block, the expected next sequence number is used.
The session number is used so that a client can easily detect when a new session has started after the daily maintenance window or failure on the server side. It should stay the same for a given multicast channel until a new session has started. It should be noted that the same number can be used by different multicast channels.