ForwardingProcessor Class Reference

a processor base class with helper functions. More...

#include <forwarding_processor.h>

Inheritance diagram for ForwardingProcessor:

Protected Member Functions
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< 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 ()
	reconnect a socket. More...
stdx::expected< Processor::Result, std::error_code >	mysql_reconnect_start ()
	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...
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...
void	trace (Tracer::Event e)
Tracer &	tracer ()

Private Attributes
classic_protocol::message::server::Error	reconnect_error_ {}
	reconnect error set by lazy_reconnect_start(). More...

Additional Inherited Members
Public Types inherited from BasicProcessor
enum class	Result {   Again , RecvFromClient , SendToClient , RecvFromServer ,   RecvFromBoth , SendToServer , SendableToServer , Suspend ,   Done , Void }
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 ()
virtual stdx::expected< Result, std::error_code >	process ()=0
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

a processor base class with helper functions.

Member Function Documentation

forward_client_to_server()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::forward_client_to_server ( bool  noflush = false )

protected

forward the current packet from the client-side to the server-side.

Pushes a ClientToServerForwarder to the processor-stack.

Parameters

noflush

if true, it isn't required to wait until the packet is sent to the server.

forward_server_to_client()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::forward_server_to_client ( bool  noflush = false )

protected

forward the current packet from the server-side to the client-side.

use 'noflush' if the next message is from the server side too to allow merging of multiple server-side packets into one "send-to-client".

Useful for resultsets which is split into multiple packets.

Pushes a ServerToClientForwarder to the processor-stack.

Parameters

noflush

if true, it isn't required to wait until the packet is sent to the client.

mysql_reconnect_start()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::mysql_reconnect_start ( )

protected

reconnect a mysql classic connection.

pushes a LazyConnector on the processor stack.

when finished, a mysql connection is authenticated.

pool_server_connection()

stdx::expected< bool, std::error_code > ForwardingProcessor::pool_server_connection ( )

protected

move the server connection to the pool.

reconnect_error() [1/2]

classic_protocol::message::server::Error ForwardingProcessor::reconnect_error ( ) const

inlineprotected

get the reconnect error.

reconnect_error() [2/2]

void ForwardingProcessor::reconnect_error ( classic_protocol::message::server::Error  err )

inlineprotected

set the reconnect error.

may be called from handlers.

reconnect_send_error_msg()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::reconnect_send_error_msg ( Channel *  src_channel, ClassicProtocolState *  src_protocol  )

protected

send a Error msg based on the reconnect_error().

Return values

Result::SendToClient

on success.

recv_server_failed_and_check_client_socket()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::recv_server_failed_and_check_client_socket ( std::error_code  ec )

protected

handle error-code of a failed receive() from the server-socket and check the status of the client socket.

socket_reconnect_start()

stdx::expected< Processor::Result, std::error_code > ForwardingProcessor::socket_reconnect_start ( )

protected

reconnect a socket.

pushes a ConnectProcessor on the processor stack.

when finished, a socket is established.

Return values

Result::Again

on success.

Member Data Documentation

reconnect_error_

classic_protocol::message::server::Error ForwardingProcessor::reconnect_error_ {}

private

reconnect error set by lazy_reconnect_start().

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

• router/src/routing/src/forwarding_processor.h
• router/src/routing/src/forwarding_processor.cc