fix_client::SeqNumStore Class Reference

A thread-safe, file-backed repository for FIX Sequence Numbers. More...

#include <SeqNumStore.h>

Collaboration diagram for fix_client::SeqNumStore:

Public Member Functions
	SeqNumStore (const std::string &senderCompId, const std::string &directory="seq_store")
	Constructs a new SeqNumStore.
uint32_t	getNextSenderSeqNum () const
	Gets the next expected outgoing sequence number.
uint32_t	getNextTargetSeqNum () const
	Gets the next expected incoming sequence number.
void	reset ()
	Resets the sequence numbers to 1 (e.g., on a new day or clean Logon).
void	setSeqNums (uint32_t inSeq, uint32_t outSeq)
	Sets both sequence numbers and persists them to disk.

Private Member Functions
void	load ()
void	save () const

Private Attributes
std::string	mFilePath
uint32_t	mInSeqNum = 1
std::mutex	mMutex
uint32_t	mOutSeqNum = 1

Detailed Description

A thread-safe, file-backed repository for FIX Sequence Numbers.

To prevent ResendRequest loops on startup, the client must remember its last known sequence numbers. This class saves them to disk.

Constructor & Destructor Documentation

SeqNumStore()

fix_client::SeqNumStore::SeqNumStore	(	const std::string &	senderCompId,
		const std::string &	directory = "seq_store"
	)

Constructs a new SeqNumStore.

Parameters

senderCompId	The component ID, used to generate the filename.
directory	The directory to save the sequence files (defaults to local dir).

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Member Function Documentation

getNextSenderSeqNum()

uint32_t fix_client::SeqNumStore::getNextSenderSeqNum

(

)

const

Gets the next expected outgoing sequence number.

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getNextTargetSeqNum()

uint32_t fix_client::SeqNumStore::getNextTargetSeqNum

(

)

const

Gets the next expected incoming sequence number.

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load()

void fix_client::SeqNumStore::load ( )

private

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reset()

void fix_client::SeqNumStore::reset

(

)

Resets the sequence numbers to 1 (e.g., on a new day or clean Logon).

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save()

void fix_client::SeqNumStore::save ( ) const

private

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setSeqNums()

void fix_client::SeqNumStore::setSeqNums	(	uint32_t	inSeq,
		uint32_t	outSeq
	)

Sets both sequence numbers and persists them to disk.

Parameters

inSeq	The incoming sequence number (TargetSeqNum, from server).
outSeq	The outgoing sequence number (SenderSeqNum, from client).

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Member Data Documentation

mFilePath

std::string fix_client::SeqNumStore::mFilePath

private

mInSeqNum

uint32_t fix_client::SeqNumStore::mInSeqNum = 1

private

mMutex

std::mutex fix_client::SeqNumStore::mMutex

mutableprivate

mOutSeqNum

uint32_t fix_client::SeqNumStore::mOutSeqNum = 1

private

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The documentation for this class was generated from the following files:

• client/client_fix/include/fix_client/SeqNumStore.h
• client/client_fix/src/SeqNumStore.cpp