#include <OnixS/CME/iLink3/Session.h>

Public Member Functions
	Session (const SessionSettings &settings, int marketSegmentId, SessionListener listener, SessionStorageType::Enum storageType=SessionStorageType::FileBased, SessionStorage storage=nullptr, UInt64 uuid=UndefinedUuid, const std::string &customKey="")

	Session (SessionReactor &stack, const SessionSettings &settings, int marketSegmentId, SessionListener listener, SessionStorageType::Enum storageType=SessionStorageType::FileBased, SessionStorage storage=nullptr, UInt64 uuid=UndefinedUuid, const std::string &customKey="")

	~Session ()

UInt64	uuid () const noexcept

std::string	id () const

int	marketSegmentId () const noexcept

std::string	customKey () const

bool	negotiated () const

Session &	negotiated (bool negotiated)

Messaging::FTI::Enum	faultToleranceIndicator () const

Session &	faultToleranceIndicator (Messaging::FTI::Enum value)

Session &	connect (const std::string &host, Port port)

Threading::SharedFuture< void >	connectAsync (const std::string &host, Port port)

Session &	disconnect (const std::string &reason="")

Threading::SharedFuture< void >	disconnectAsync (const std::string &reason="")

template<typename SbeMessageType , size_t MaxMessageSize, typename MessageInitializer >
Session &	send (Messaging::MessageHolder< SbeMessageType, MaxMessageSize, MessageInitializer > &msg, Messaging::Timestamp sendingTime=UtcWatch::now())

template<typename SbeMessageType , size_t MaxMessageSize, typename MessageInitializer >
Session &	send (Messaging::MessageHolder< SbeMessageType, MaxMessageSize, MessageInitializer > &&msg, Messaging::Timestamp sendingTime=UtcWatch::now())

template<typename SbeMessageType , size_t MaxMessageSize, typename MessageInitializer >
Session &	send (MessageBatch< SbeMessageType, MaxMessageSize, MessageInitializer > &msgs, Messaging::Timestamp sendingTime=UtcWatch::now(), size_t maxPacketSize=CmeMaxPacketSize)

Session &	send (MessageBatchCombiner &msgs, Messaging::Timestamp sendingTime=UtcWatch::now(), size_t maxPacketSize=CmeMaxPacketSize)

Session &	sendSequenceMessage (Messaging::KeepAliveLapsed::Enum keepAliveLapsed=Messaging::KeepAliveLapsed::Lapsed)

template<typename SbeMessageType , size_t MaxMessageSize>
Session &	warmUp (Messaging::MessageHolder< SbeMessageType, MaxMessageSize > &msg, Messaging::Timestamp sendingTime=UtcWatch::now(), int warmupFlags=0)

template<typename SbeMessageType , size_t MaxMessageSize, typename MessageInitializer >
Session &	warmUp (MessageBatch< SbeMessageType, MaxMessageSize, MessageInitializer > &msgs, Messaging::Timestamp sendingTime=UtcWatch::now(), size_t maxPacketSize=CmeMaxPacketSize, int warmupFlags=0)

Session &	warmUp (MessageBatchCombiner &msgs, Messaging::Timestamp sendingTime=UtcWatch::now(), size_t maxPacketSize=CmeMaxPacketSize, int warmupFlags=0)

Session &	throttle ()

size_t	tryThrottle ()

Session &	throttlingLimit (size_t messagesCount, size_t intervalInMs=1000)

std::string	remoteHost () const

std::string	remoteIpAddress () const

Port	remotePort () const

std::pair< Port, Port >	localPortRange () const noexcept

Session &	localPortRange (std::pair< Port, Port > portRange)

std::string	localNetworkInterface () const

Session &	localNetworkInterface (const std::string &value)

Port	localPort () const

bool	tcpNoDelayOption () const

Session &	tcpNoDelayOption (bool value)

const SocketOptions &	socketOptions () const

Session &	socketOptions (const SocketOptions &options)

Session &	receivingThreadAffinity (CpuIndex cpuIndex)

Session &	receivingThreadAffinity (const CpuIndexes &cpuIndexes)

const CpuIndexes &	receivingThreadAffinity () const

Session &	sendingThreadAffinity (CpuIndex cpuIndex)

Session &	sendingThreadAffinity (const CpuIndexes &cpuIndexes)

const CpuIndexes &	sendingThreadAffinity () const

int	receivingThreadPriority () const

Session &	receivingThreadPriority (int priority)

int	sendingThreadPriority () const

Session &	sendingThreadPriority (int priority)

int	receivingThreadPolicy () const

Session &	receivingThreadPolicy (int policy)

int	sendingThreadPolicy () const

Session &	sendingThreadPolicy (int policy)

unsigned	receiveSpinningTimeout () const noexcept

Session &	receiveSpinningTimeout (unsigned timeoutInUs)

unsigned	sendSpinningTimeout () const noexcept

Session &	sendSpinningTimeout (unsigned timeoutInUs)

bool	reportNewMessagesWhileWaitingForMissedMessages () const

Session &	reportNewMessagesWhileWaitingForMissedMessages (bool value)

unsigned	messageGrouping () const noexcept

Session &	messageGrouping (unsigned numberOfMessagesToGroup)

SessionStorageType::Enum	storageType () const noexcept

const std::string &	storageId () const noexcept

SeqNumber	outSeqNum () const noexcept

Session &	outSeqNum (SeqNumber nextOutSeqNum)

SeqNumber	inSeqNum () const

Session &	inSeqNum (SeqNumber nextExpectedInSeqNum)

SeqNumber	previousSeqNo () const noexcept

Session &	previousSeqNo (SeqNumber value)

Messaging::UInt64	previousUuid () const noexcept

Session &	previousUuid (Messaging::UInt64 value)

Session &	reset (bool startOfWeek=false)

SessionStateId::Enum	state () const

Messaging::Timestamp	creationTime () const noexcept

void	flushSessionStorage ()

unsigned	reconnectAttempts () const

Session &	reconnectAttempts (unsigned reconnectAttempts)

unsigned	reconnectInterval () const

Session &	reconnectInterval (unsigned seconds)

bool	localTimeUsage () const

Session &	localTimeUsage (bool useLocalTime)

const std::string &	storageDirectory () const

bool	logBeforeSending () const

Session &	logBeforeSending (bool value)

size_t	incomingMessageGapQueueMaximumSize () const

Session &	incomingMessageGapQueueMaximumSize (size_t value)

const Session &	log (const std::string &message) const

std::string	toString () const

Messaging::Timestamp	licenseExpirationDate () const

Messaging::SchemaVersion	messagingVersion () const noexcept

bool	detectMessageGapForPreviousUuid () const

Session &	detectMessageGapForPreviousUuid (bool detectGap)

Handle	socketHandle ()

size_t	outboundQueueBytes ()

bool	getTcpInfo (TcpInfo &)

Static Public Member Functions
static const std::string &	version () noexcept

Static Public Attributes
static const UInt64	UndefinedUuid = 0

static const size_t	CmeMaxPacketSize = 1420

static const int	UndefinedAffinity = -1

static const Handle	InvalidSocketHandle

Detailed Description

Definition at line 47 of file Session.h.

Constructor & Destructor Documentation

Session	(	const SessionSettings &	settings,
		int	marketSegmentId,
		SessionListener *	listener,
		SessionStorageType::Enum	storageType = `SessionStorageType::FileBased`,
		SessionStorage *	storage = `nullptr`,
		UInt64	uuid = `UndefinedUuid`,
		const std::string &	customKey = `""`
	)

Constructor.

Parameters

settings	Session settings.
marketSegmentId	Market segment ID.
listener	Session listener.
storageType	Session storage type.
storage	Session storage.
uuid	Universally Unique Identifier (UUID).
customKey	Custom key that could be used to distinguish sessions with the same UUID, Session ID, FirmId, and Market Segment ID values.

Session	(	SessionReactor &	stack,
		const SessionSettings &	settings,
		int	marketSegmentId,
		SessionListener *	listener,
		SessionStorageType::Enum	storageType = `SessionStorageType::FileBased`,
		SessionStorage *	storage = `nullptr`,
		UInt64	uuid = `UndefinedUuid`,
		const std::string &	customKey = `""`
	)

~Session ( )

Member Function Documentation

Session& connect	(	const std::string &	host,
		Port	port
	)

Establishes the connection.

Parameters

host	Market Segment Gateway host.
port	Market Segment Gateway port.

Returns: This session.

Threading::SharedFuture<void> connectAsync	(	const std::string &	host,
		Port	port
	)

Establishes the connection asynchronously.

Parameters

host	Market Segment Gateway host.
port	Market Segment Gateway port.

Messaging::Timestamp creationTime ( ) const

noexcept

Returns: the time when the session was created or the last reset operation was performed.

std::string customKey ( ) const

Returns: Custom key that could be used to distinguish sessions with the same UUID, Session ID, FirmId, and Market Segment ID values.

bool detectMessageGapForPreviousUuid ( ) const

Returns: the value of the option to detect the message gap for the previous UUID.

Session& detectMessageGapForPreviousUuid ( bool detectGap )

Sets the value of the option to detect the message gap for the previous UUID.

Session& disconnect ( const std::string & reason = "" )

Terminates the connection.

Parameters

reason Terminate reason details.

Note: Method blocks until the Terminate message is received in reply, or the timeout is elapsed.

Returns: This session.

Threading::SharedFuture<void> disconnectAsync ( const std::string & reason = "" )

Terminates the connection asynchronously.

Parameters

reason Terminate reason details.

Messaging::FTI::Enum faultToleranceIndicator ( ) const

Returns: the Fault Tolerance Indicator (whether the connection is the primary or backup).

Session& faultToleranceIndicator ( Messaging::FTI::Enum value )

Sets the Fault Tolerance Indicator (whether the connection is the primary or backup).

void flushSessionStorage ( )

Flushes all internal buffers of the session storage.

bool getTcpInfo ( TcpInfo & )

Gets information about the underlying TCP connection.

Returns: true when success; otherwise - false.

Note: Available on Linux only.; Not available for the TcpDirect mode.

std::string id ( ) const

Returns: Session ID (assigned by the exchange).

size_t incomingMessageGapQueueMaximumSize ( ) const

Returns: the maximum size of the message queue used during message gap recovery.

Session& incomingMessageGapQueueMaximumSize ( size_t value )

Sets the maximum size of the message queue used during message gap recovery.

SeqNumber inSeqNum ( ) const

Returns: the expected sequence number of the next inbound message.

Session& inSeqNum ( SeqNumber nextExpectedInSeqNum )

Sets the expected sequence number of the next inbound message.

Messaging::Timestamp licenseExpirationDate ( ) const

Returns: the license expiration date.

std::string localNetworkInterface ( ) const

Returns: the IP Address or name of the local network interface.

Session& localNetworkInterface ( const std::string & value )

Sets the IP Address or name of the local network interface.

Port localPort ( ) const

Returns: the local network port number.

std::pair<Port, Port> localPortRange ( ) const

noexcept

Returns: the local port range

Session& localPortRange ( std::pair< Port, Port > portRange )

Sets the local port range.

bool localTimeUsage ( ) const

Returns: the usage of local time in Handler events and logs files.

Session& localTimeUsage ( bool useLocalTime )

Specifies the usage of local time in Handler events and logs files.

const Session& log ( const std::string & message ) const

Write the given user's message to the Handler's log file using the session formatted Id.

bool logBeforeSending ( ) const

Returns: true if logging of an outgoing message to the session storage is performed before sending it to the wire; otherwise - false.

Session& logBeforeSending ( bool value )

Sets the option to log an outgoing message to the session storage before sending it to the wire.

int marketSegmentId ( ) const

noexcept

Returns: Market Segment ID.

unsigned messageGrouping ( ) const

noexcept

Returns: the number of messages to be sent together.

Session& messageGrouping ( unsigned numberOfMessagesToGroup )

Sets the number of messages to be sent together.

Parameters

numberOfMessagesToGroup If the parameter is zero (by default) or one, the Handler tries to send an outgoing application-level message in the context of the thread that calls the OnixS::CME::iLink3::Session::send method. If the message cannot be sent immediately, it is stored in the queue for the subsequent sending by the sending thread. If this parameter is larger than one, the Handler stores outgoing SBE messages in the queue for the subsequent sending by the sending thread.

Returns: This session.

Messaging::SchemaVersion messagingVersion ( ) const

noexcept

Returns: the version of the message schema.

bool negotiated ( ) const

Returns: true if the session is negotiated (the Negotiation Response message has been received in reply to the Negotiation message); otherwise - false.

Session& negotiated ( bool negotiated )

Sets the "negotiated" status.

The session is negotiated when the Negotiation Response message has been received in reply to the Negotiation message.

size_t outboundQueueBytes ( )

Returns the total number of bytes in the outbound queue.

SeqNumber outSeqNum ( ) const

noexcept

Returns: the sequence number of the next outgoing message.

Session& outSeqNum ( SeqNumber nextOutSeqNum )

Sets the sequence number of the next outgoing message.

SeqNumber previousSeqNo ( ) const

noexcept

Returns: the sequence number of the last business message published by CME with the PreviousUUID.

If no business message was published, the value is zero.

Session& previousSeqNo ( SeqNumber value )

Sets the sequence number of the last business message published by CME with the PreviousUUID.

Messaging::UInt64 previousUuid ( ) const

noexcept

Returns: The UUID from the previously established session.

This can be the CME-assigned default UUID=0 for messages published by CME before the first Negotiation of the customer at the beginning of the week.
This can be the last UUID used by the customer from the previously established session.

Session& previousUuid ( Messaging::UInt64 value )

Sets the UUID from the previously Established session.

unsigned receiveSpinningTimeout ( ) const

noexcept

Returns: the receive spinning timeout value (in microseconds).

Session& receiveSpinningTimeout ( unsigned timeoutInUs )

Sets the receive spinning timeout value (in microseconds).

Session& receivingThreadAffinity ( CpuIndex cpuIndex )

Sets the receiving thread CPU affinity.

Session& receivingThreadAffinity ( const CpuIndexes & cpuIndexes )

Returns: the receiving thread CPU affinity.

const CpuIndexes& receivingThreadAffinity ( ) const

Sets the receiving thread CPU affinity.

int receivingThreadPolicy ( ) const

Returns: the receiving thread policy.

Session& receivingThreadPolicy ( int policy )

Sets the receiving thread policy.

int receivingThreadPriority ( ) const

Returns: the scheduling priority of the receiving thread.

Session& receivingThreadPriority ( int priority )

Sets the scheduling priority of the receiving thread.

unsigned reconnectAttempts ( ) const

Returns: the maximum number of tries to restore the telecommunications link.

Session& reconnectAttempts ( unsigned reconnectAttempts )

Sets the maximum number of tries to restore the telecommunications link.

unsigned reconnectInterval ( ) const

Returns: the time interval between retries to restore the telecommunications link (seconds).

Session& reconnectInterval ( unsigned seconds )

Sets the time interval between retries to restore the telecommunications link (seconds).

std::string remoteHost ( ) const

Returns: the host name the session is connected to.

std::string remoteIpAddress ( ) const

Returns: the IP address the session is connected to.

Port remotePort ( ) const

Returns: the port number the session is connected to.

bool reportNewMessagesWhileWaitingForMissedMessages ( ) const

Returns: true if new messages are reported even when the message gap is detected, and the reply on the Retransmit Request message is expected; otherwise - false.

Session& reportNewMessagesWhileWaitingForMissedMessages ( bool value )

Sets the option to report new messages even when the message gap is detected, and the reply on the Retransmit Request message is expected.

Session& reset ( bool startOfWeek = false )

Backups the current log files, resets the sequence numbers to 1 and generates a new UUID.

Warning: Can be called only when the session is disconnected.

Parameters

startOfWeek if true then the PreviousUUID and PreviousSeqNum are reset to 0.

Returns: This session.

Session & send	(	Messaging::MessageHolder< SbeMessageType, MaxMessageSize, MessageInitializer > &	msg,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`
	)

Sends the message.

Parameters

sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.
msg	The message to be sent.

Note: This call is thread-safe, except for the TCPDirect mode.

Returns: This session.

Definition at line 625 of file Session.h.

Session & send	(	Messaging::MessageHolder< SbeMessageType, MaxMessageSize, MessageInitializer > &&	msg,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`
	)

Sends the message.

Parameters

sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.
msg	The message to be sent.

Note: This call is thread-safe, except for the TCPDirect mode.

Returns: This session.

Definition at line 654 of file Session.h.

Session & send	(	Messaging::MessageBatch< SbeMessageType, MaxMessageSize, MessageInitializer > &	msgs,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`,
		size_t	maxPacketSize = `CmeMaxPacketSize`
	)

Sends messages.

Note: This call is thread-safe.

Parameters

msgs	Message batch to send.
maxPacketSize	The maximum number of bytes written to the socket's send buffer together. This parameter could be used to reduce the probability that the operating system will fragment the message across multiple TCP packets.
sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.

Note: The maxPacketSize parameter should not be less than any message size in the batch. Otherwise, the method call can produce an error, and the session can close the connection.

Returns: This session.

Definition at line 668 of file Session.h.

Session& send	(	MessageBatchCombiner &	msgs,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`,
		size_t	maxPacketSize = `CmeMaxPacketSize`
	)

Sends messages.

Note: This call is thread-safe.

Parameters

msgs	Message batch combiner to send.
maxPacketSize	The maximum number of bytes written to the socket's send buffer together. This parameter could be used to reduce the probability that the operating system will fragment the message across multiple TCP packets.
sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.

Note: The maxPacketSize parameter should not be less than any message size in the batch. Otherwise, the method call can produce an error, and the session can close the connection.

Returns: This session.

Session& sendingThreadAffinity ( CpuIndex cpuIndex )

Sets the sending thread CPU affinity.

Session& sendingThreadAffinity ( const CpuIndexes & cpuIndexes )

Sets the sending thread CPU affinity.

const CpuIndexes& sendingThreadAffinity ( ) const

Returns: the auxiliary sending thread CPU affinity.

int sendingThreadPolicy ( ) const

Sets the sending thread policy.

Session& sendingThreadPolicy ( int policy )

Returns: the sending thread policy.

int sendingThreadPriority ( ) const

Returns: the scheduling priority of the sending thread.

Session& sendingThreadPriority ( int priority )

Returns: the scheduling priority of the sending thread.

Session& sendSequenceMessage ( Messaging::KeepAliveLapsed::Enum keepAliveLapsed = Messaging::KeepAliveLapsed::Lapsed )

Send the Sequence message.

Note: The session sends Sequence messages automatically per the CME iLink protocol. This method should be used only if an ad hoc Sequence message is required and the connection is established.

Parameters

keepAliveLapsed Indicates whether one Keep Alive interval has lapsed without any message received.

Returns: This session.

unsigned sendSpinningTimeout ( ) const

noexcept

Returns: the send spinning timeout value (in microseconds).

Session& sendSpinningTimeout ( unsigned timeoutInUs )

Sets the send spinning timeout value (in microseconds).

Handle socketHandle ( )

Returns the socket handle which the session uses to transmit data.

Note: The TCPDirect mode does not support this method, so it always returns the InvalidSocketHandle value.

const SocketOptions& socketOptions ( ) const

Returns: Socket options.

Session& socketOptions ( const SocketOptions & options )

Sets socket options.

SessionStateId::Enum state ( ) const

Returns: Session's current state.

const std::string& storageDirectory ( ) const

Returns: The session storage directory.

const std::string& storageId ( ) const

noexcept

Returns: Session storage ID.

SessionStorageType::Enum storageType ( ) const

noexcept

Returns: Session storage type.

bool tcpNoDelayOption ( ) const

Returns: the value of the TCP_NODELAY option (improve latency at the expense of message throughput).

Session& tcpNoDelayOption ( bool value )

Sets the TCP_NODELAY option (improve latency at the expense of message throughput).

Session& throttle ( )

Performs the throttling of a session that must be called before each send function call.

If the count of messages per time unit exceeds the throttling limit, the function will be blocked until the given time interval is passed.

Note: This call is thread-safe.

Session& throttlingLimit	(	size_t	messagesCount,
		size_t	intervalInMs = `1000`
	)

Sets throttling limit parameters.

Parameters

messagesCount	Message limit per time unit.
intervalInMs	Time interval to limit messages.

Note: This call is thread-safe.

std::string toString ( ) const

Returns: the human-friendly description.

size_t tryThrottle ( )

Checks the throttling of a session that must be called before each send function call.

If the count of messages per time unit exceeds the throttling limit, the function returns the delay (in milliseconds) until the sending becomes possible. Otherwise, it returns 0.

Note: This call is thread-safe.

UInt64 uuid ( ) const

noexcept

Returns: the Universally Unique Identifier (UUID).

static const std::string& version ( )

staticnoexcept

Returns: the version of the library.

Session & warmUp	(	Messaging::MessageHolder< SbeMessageType, MaxMessageSize > &	msg,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`,
		int	warmupFlags = `0`
	)

Warms up the sending path.

Parameters

msg	SBE message to warm up the sending path.
warmupFlags	Specific flags which can be used to turn on the warmup feature for a specific NIC.
sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.

Note: This call is thread-safe, except for the TCPDirect mode.

Returns: This session.

Definition at line 640 of file Session.h.

Session & warmUp	(	Messaging::MessageBatch< SbeMessageType, MaxMessageSize, MessageInitializer > &	msgs,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`,
		size_t	maxPacketSize = `CmeMaxPacketSize`,
		int	warmupFlags = `0`
	)

Warms up the sending path.

Note: This call is thread-safe.

Parameters

msgs	Message batch to send.
maxPacketSize	The maximum number of bytes written to the socket's send buffer together during the subsequent `send` call.
sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.
warmupFlags	Specific flags which can be used to turn on the warmup feature for a specific NIC.

Note: The maxPacketSize parameter should not be less than any message size in the batch. Otherwise, the method call can produce an error, and the session can close the connection.

Returns: This session.

Definition at line 681 of file Session.h.

Session& warmUp	(	MessageBatchCombiner &	msgs,
		Messaging::Timestamp	sendingTime = `UtcWatch::now()`,
		size_t	maxPacketSize = `CmeMaxPacketSize`,
		int	warmupFlags = `0`
	)

Warms up the sending path.

Note: This call is thread-safe.

Parameters

msgs	Message batch combiner to send.
maxPacketSize	The maximum number of bytes written to the socket's send buffer together during the subsequent `send` call.
sendingTime	The time value to be used for a `sendingTimeEpoch` field of the message(s) being sent.
warmupFlags	Specific flags which can be used to turn on the warmup feature for a specific NIC.

Note: The maxPacketSize parameter should not be less than any message size in the batch. Otherwise, the method call can produce an error, and the session can close the connection.

Returns: This session.

Member Data Documentation

const size_t CmeMaxPacketSize = 1420

static

CME states: Packet size maximum behavior based on MTU (Maximum Transmission Unit) - 1420 bytes, as defined on our network.

Definition at line 169 of file Session.h.

const Handle InvalidSocketHandle

static

Represents invalid value of socket handle.

Definition at line 545 of file Session.h.

const int UndefinedAffinity = -1

static

Definition at line 353 of file Session.h.

const UInt64 UndefinedUuid = 0

static

Definition at line 50 of file Session.h.

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

OnixS/CME/iLink3/Session.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation