classic protocol handshake between router<->server and client<->router. More...

#include <classic_greeting_forwarder.h>

Inheritance diagram for ServerFirstConnector:

Public Types
enum class	Stage { Connect , ServerGreeting , ServerGreeted , Error , Ok }
	stages of the handshake flow. More...

Public Types inherited from BasicProcessor
enum class	Result { Again , RecvFromClient , SendToClient , RecvFromServer , RecvFromBoth , SendToServer , SendableToServer , Suspend , Done , Void }

Public Member Functions
stdx::expected< Result, std::error_code >	process () override

void	stage (Stage stage)

Stage	stage () const

Public Member Functions inherited from Processor
	BasicProcessor (MysqlRoutingClassicConnectionBase *conn)

Public Member Functions inherited from BasicProcessor
	BasicProcessor (MysqlRoutingClassicConnectionBase *conn)

virtual	~BasicProcessor ()=default

const MysqlRoutingClassicConnectionBase *	connection () const

MysqlRoutingClassicConnectionBase *	connection ()

Private Member Functions
stdx::expected< Result, std::error_code >	connect ()

stdx::expected< Result, std::error_code >	server_greeting ()

stdx::expected< Result, std::error_code >	server_greeted ()
	received an server::greeting or server::error from the server. More...

Private Attributes
Stage	stage_ {Stage::Connect}

std::chrono::steady_clock::time_point	started_

Additional Inherited Members
Static Public Attributes inherited from ForwardingProcessor
static constexpr const std::chrono::milliseconds	kConnectRetryInterval
	interval between connect-retries. More...

Protected Member Functions inherited from ForwardingProcessor
stdx::expected< Result, std::error_code >	forward_server_to_client (bool noflush=false)
	forward the current packet from the server-side to the client-side. More...

stdx::expected< Result, std::error_code >	forward_client_to_server (bool noflush=false)
	forward the current packet from the client-side to the server-side. More...

stdx::expected< Processor::Result, std::error_code >	skip_or_inject_end_of_columns (bool no_flush=false)
	adjust the end-of-columns packet. More...

stdx::expected< bool, std::error_code >	pool_server_connection ()
	move the server connection to the pool. More...

stdx::expected< Processor::Result, std::error_code >	socket_reconnect_start (TraceEvent *parent_event)
	reconnect a socket. More...

stdx::expected< Processor::Result, std::error_code >	mysql_reconnect_start (TraceEvent *parent_event)
	reconnect a mysql classic connection. More...

stdx::expected< Result, std::error_code >	recv_server_failed_and_check_client_socket (std::error_code ec)
	handle error-code of a failed receive() from the server-socket and check the status of the client socket. More...

stdx::expected< Processor::Result, std::error_code >	reconnect_send_error_msg (Channel &src_channel, ClassicProtocolState &src_protocol)
	send a Error msg based on the reconnect_error(). More...

template<class Proto >
stdx::expected< Processor::Result, std::error_code >	reconnect_send_error_msg (TlsSwitchableConnection< Proto > &conn)

void	reconnect_error (classic_protocol::message::server::Error err)
	set the reconnect error. More...

classic_protocol::message::server::Error	reconnect_error () const
	get the reconnect error. More...

Protected Member Functions inherited from Processor
stdx::expected< Result, std::error_code >	send_server_failed (std::error_code ec)

stdx::expected< Result, std::error_code >	recv_server_failed (std::error_code ec)

stdx::expected< Result, std::error_code >	send_client_failed (std::error_code ec)

stdx::expected< Result, std::error_code >	recv_client_failed (std::error_code ec)

stdx::expected< Result, std::error_code >	server_socket_failed (std::error_code ec)

stdx::expected< Result, std::error_code >	client_socket_failed (std::error_code ec)

stdx::expected< void, std::error_code >	discard_current_msg (Channel &src_channel, ClassicProtocolState &src_protocol)
	discard to current message. More...

template<class Proto >
stdx::expected< void, std::error_code >	discard_current_msg (TlsSwitchableConnection< Proto > &conn)

void	trace (Tracer::Event e)

Tracer &	tracer ()

TraceEvent *	trace_span (TraceEvent *parent_span, const std::string_view &prefix)
	start a span. More...

void	trace_span_end (TraceEvent *event, TraceEvent::StatusCode status_code=TraceEvent::StatusCode::kUnset)
	end a span and set a status-code. More...

TraceEvent *	trace_command (const std::string_view &prefix)
	start a command span. More...

TraceEvent *	trace_connect_and_forward_command (TraceEvent *parent_span)
	start a connect-and-forward span. More...

TraceEvent *	trace_connect (TraceEvent *parent_span)
	start a connect span. More...

void	trace_set_connection_attributes (TraceEvent *ev)
	start a connect span. More...

TraceEvent *	trace_forward_command (TraceEvent *parent_span)
	start a forward span. More...

void	trace_command_end (TraceEvent *event, TraceEvent::StatusCode status_code=TraceEvent::StatusCode::kUnset)
	end a command span and set a status-code. More...

Static Protected Member Functions inherited from ForwardingProcessor
template<class T >
static bool	message_can_be_forwarded_as_is (ClassicProtocolState &src_protocol, ClassicProtocolState &dst_protocol, const T &msg)
	check of the capabilities of the source and the destination are the same for this message. More...

static bool	connect_error_is_transient (const classic_protocol::message::server::Error &err)
	check if the error is a transient error. More...

Static Protected Member Functions inherited from Processor
static void	log_fatal_error_code (const char *msg, std::error_code ec)
	log a message with error-code as error. More...

Detailed Description

classic protocol handshake between router<->server and client<->router.

a server::greeting processor which fetches a server::greeting to send it to the client.

c->r   : accept()
   r->s: connect()
   r<-s: server::greeting
c<-r   : ...

Member Enumeration Documentation

◆ Stage

enum class ServerFirstConnector::Stage

strong

stages of the handshake flow.

Enumerator
Connect
ServerGreeting
ServerGreeted
Error
Ok

Member Function Documentation

◆ connect()

stdx::expected< Processor::Result, std::error_code > ServerFirstConnector::connect ( )

private

◆ process()

stdx::expected< Processor::Result, std::error_code > ServerFirstConnector::process ( )

overridevirtual

Implements BasicProcessor.

◆ server_greeted()

stdx::expected< Processor::Result, std::error_code > ServerFirstConnector::server_greeted ( )

private

received an server::greeting or server::error from the server.

◆ server_greeting()

stdx::expected< Processor::Result, std::error_code > ServerFirstConnector::server_greeting ( )

private

◆ stage() [1/2]

Stage ServerFirstConnector::stage ( ) const

inline

◆ stage() [2/2]

void ServerFirstConnector::stage ( Stage stage )

inline

Member Data Documentation

◆ stage_

Stage ServerFirstConnector::stage_ {Stage::Connect}

private

◆ started_

std::chrono::steady_clock::time_point ServerFirstConnector::started_

private

Initial value:

{

std::chrono::steady_clock::now()}

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

router/src/routing/src/classic_greeting_forwarder.h
router/src/routing/src/classic_greeting_forwarder.cc

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ Stage

Member Function Documentation

◆ connect()

◆ process()

◆ server_greeted()

◆ server_greeting()

◆ stage() [1/2]

◆ stage() [2/2]

Member Data Documentation

◆ stage_

◆ started_