Introduction

OnixS ultra-low latency C++ FIX Engine is a C++ class library that will FIX-enable applications written in C++ language.

OnixS C++ FIX Engine provides the following services:

• Manages a network connection.
• Manages the FIX session layer (for the delivery of application messages), handles Sequence Reset, Resend Request, Test Request, Logon and Logout session-level messages automatically.
• Manages the FIX application layer (defines business-related data content).
• Creates (outgoing) FIX messages.
• Parses (incoming) FIX messages.
• Validates FIX messages.
• Persists messages and FIX session state.
• Recovers the FIX session state after restarting in accordance with the FIX state model.
• Detects the telecommunication link failures and reconnects the FIX session automatically.
• TLS/SSL-based encryption.
• FAST compression and decompression.

The following image is a high-level overview of the C++ FIX Engine architecture: