SSE Level 2 Vendor Interface Specification(FAST)-14章-Message Sequence（消息序列）

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本文介绍了VSS如何通过实时数据端口9129及重建数据端口9130与VDE建立连接并进行数据交换的过程。详细说明了连接建立、数据请求、数据重建以及连接终止的步骤。

14 Message Sequence
>>>消息序列

14.1 Connecting to Receiving Data from Vendor Data Engine
>>>连接到VDE接收数据

14.1.1 Successful Connection to VDE
>>>成功连接到VDE

VSS makes a connection to the real-time data port, 9129. It then sends Logon message to VDE.
VDE then sends a confirming Logon message to VSS if it has accepted the connection. VDE sends a
Logout message to VSS if it does not accept the connection.
>>>VSS连接到VDE的实时数据端口9129.然后发送LOGON消息给VDE。
>>>如果VDE接爱了连接，就回发一个确认LOGON消息给VSS.
>>>如果VDE不接受连接，就回发一个LOGOUT消息给VSS.

14.1.2 Rejected Connection from VDE
>>>被拒绝连接到VDE

14.1.3 Connection Reset by VDE
>>>连接重置

Anytime if VDE needs to disconnect VSS, it sends a Logout message to VSS and then disconnects
the TCP connection.
>>>任何时候如果VDE需要断开连接，它首先会发送一个LOGOUT消息给VSS，然后再断开TCP连接。

14.2 Rebuilding Data From Vendor Data Engine

>>>从VDE重建数据
VSS makes a connection to the rebuild data port, 9130. It then sends Logon message to VDE. VDE
then sends a confirming Logon message to VSS if it has accepted the connection. VDE sends a
Logout message to VSS if it does not accept the connection.

If the connection is accepted, VDE sends a confirming logon message to the VSS. Upon receiving
the logon confirmation message, VSS should send the rebuild data request to VDE. VDE will request
the rebuild data message from rebuild server and send back data returned to VSS.

When data has been completely sent to VSS, VDE will send a Logout message to VSS and then
disconnect the TCP/IP connection immediately.

>>>VSS连接到VDE的重建数据端口9130.然后发送LOGON消息给VDE。

>>>如果VDE接爱了连接，就回发一个确认LOGON消息给VSS.
>>>如果VDE不接受连接，就回发一个LOGOUT消息给VSS.

>>>VSS接收到确认LOGON消息后，就可以发送重建数据的请求给VDE了，VDE将向重建数据服务器请求数据并且返回给VSS.

>>>当数据全部发回给VSS之后，VDE将发送LOGOUT消息给VSS并且立刻断开TCP连接。