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The FIX Antenna HFT library supports sending messages in batches, which allows for efficient transmission by grouping multiple messages into a single memory chunk. These batched messages are stored as a contiguous vector in memory and passed to the OS socket API in one send operation. This guide will teach you how to use the Engine::PutMessageOptions::BatchOp enumeration to control batching operations when working with the Session::push method.
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Summary of BatchOp Options and Behavior
BatchOp Value | Description | Behavior | Error Condition |
|---|---|---|---|
NotBatched | Sends a single non-batched message immediately. | Sends the message without batching. | Throws std::runtime_error if a batch is in progress. |
Begin | Starts a new batch and pre-allocates memory for it. | Initializes a new batch for message grouping. | Throws std::runtime_error if a batch is already in progress. |
Add | Adds a message to the current batch. Starts a new batch if none exists. | Appends the message to the batch. Reallocates memory buffer if needed. | No error condition for starting. |
Send | Finalizes the current batch and sends all accumulated messages. | Sends the batch buffer through the OS socket API. Ends the current batch. | Throws std::runtime_error if no batch is active. |
By using these options effectively, you can manage message batching with precision, improve performance, and handle messages according to the specific requirements of your application.