#include <helper.h>

Inheritance diagram for statefulhelper:

Collaboration diagram for statefulhelper:

[legend]

Public Types
using	Pointer = RefCount< statefulhelper >

typedef std::unordered_map< Helper::ReservationId, helper_stateful_server * >	Reservations

Public Member Functions
	~statefulhelper () override=default

void	reserveServer (helper_stateful_server *srv)
	reserve the given server More...

void	cancelReservation (const Helper::ReservationId reservation)
	undo reserveServer(), clear the reservation and kick the queue More...

void	openSessions () override

Xaction *	nextRequest ()

bool	trySubmit (const char buf, HLPCB callback, void *data)
	If possible, submit request. Otherwise, either kill Squid or return false. More...

void	submitRequest (Xaction *)

void	packStatsInto (Packable p, const char label=nullptr) const
	Dump some stats about the helper state to a Packable object. More...

bool	willOverload () const

void	handleKilledServer (SessionBase *, bool &needsNewServers)

void	handleFewerServers (bool madeProgress)

void	callBack (Xaction &)
	sends transaction response to the transaction initiator More...

void	sessionClosed (SessionBase &)
	handles exited helper process More...

Static Public Member Functions
static Pointer	Make (const char *name)

Public Attributes
wordlist *	cmdline = nullptr

dlink_list	servers

std::queue< Xaction * >	queue

const char *	id_name = nullptr

ChildConfig	childs
	Configuration settings for number running. More...

int	ipc_type = 0

Ip::Address	addr

unsigned int	droppedRequests = 0
	requests not sent during helper overload More...

time_t	overloadStart = 0
	when the helper became overloaded (zero if it is not) More...

time_t	last_queue_warn = 0

time_t	last_restart = 0

time_t	timeout = 0
	Requests timeout. More...

bool	retryTimedOut = false
	Whether the timed-out requests must retried. More...

bool	retryBrokenHelper = false
	Whether the requests must retried on BH replies. More...

SBuf	onTimedOutResponse
	The response to use when helper response timedout. More...

char	eom = '\n'
	The char which marks the end of (response) message, normally ' '. More...

struct Helper::Client::_stats	stats

Protected Member Functions
bool	queueFull () const
	whether queuing an additional request would overload the helper More...

bool	overloaded () const

void	syncQueueStats ()
	synchronizes queue-dependent measurements with the current queue state More...

bool	prepSubmit ()

void	submit (const char buf, HLPCB callback, void *data)
	dispatches or enqueues a helper requests; does not enforce queue limits More...

Private Member Functions
	statefulhelper (const char *const name)

helper_stateful_server *	findServer (const Helper::ReservationId &reservation)

void	submit (const char buf, HLPCB callback, void *data, const Helper::ReservationId &reservation)

bool	trySubmit (const char buf, HLPCB callback, void *data, const Helper::ReservationId &reservation)
	reserved servers indexed by reservation IDs More...

Private Attributes
Reservations	reservations

Friends
void	helperStatefulSubmit (const statefulhelper::Pointer &, const char buf, HLPCB , void *cbData, const Helper::ReservationId &)

Detailed Description

Definition at line 153 of file helper.h.

Member Typedef Documentation

◆ Pointer

using statefulhelper::Pointer = RefCount<statefulhelper>

Definition at line 156 of file helper.h.

◆ Reservations

typedef std::unordered_map<Helper::ReservationId, helper_stateful_server *> statefulhelper::Reservations

Definition at line 157 of file helper.h.

Constructor & Destructor Documentation

◆ ~statefulhelper()

statefulhelper::~statefulhelper ( )

overridedefault

◆ statefulhelper()

statefulhelper::statefulhelper ( const char *const name )

inlineexplicitprivate

Definition at line 175 of file helper.h.

Member Function Documentation

◆ callBack()

void Client::callBack ( Xaction & r )

inherited

Definition at line 572 of file helper.cc.

References Assure, Helper::Request::callback, cbdataReferenceValidDone, Helper::Request::data, Helper::Xaction::reply, and Helper::Xaction::request.

Referenced by Helper::SessionBase::dropQueued(), and helperReturnBuffer().

◆ cancelReservation()

void statefulhelper::cancelReservation ( const Helper::ReservationId reservation )

Definition at line 617 of file helper.cc.

References asyncCall(), cbdataDialer(), helper_stateful_server::clearReservation(), helperStatefulServerDone(), and ScheduleCallHere.

◆ findServer()

helper_stateful_server * statefulhelper::findServer ( const Helper::ReservationId & reservation )

private

Returns: the previously reserved server (if the reservation is still valid) or nil

Definition at line 633 of file helper.cc.

◆ handleFewerServers()

void Client::handleFewerServers ( bool madeProgress )

inherited

Reacts to unexpected helper process death(s), including a failure to start helper(s) and an unexpected exit of a previously started helper.

See also: handleKilledServer()

Parameters

madeProgress whether the died helper(s) responded to any requests

Definition at line 881 of file helper.cc.

References DBG_CRITICAL, DBG_IMPORTANT, debugs, Debug::Extra(), fatalf(), and squid_curtime.

◆ handleKilledServer()

void Client::handleKilledServer	(	SessionBase *	srv,
		bool &	needsNewServers
	)

inherited

Updates internal statistics and starts new helper processes after an unexpected server exit

Parameters

needsNewServers true if new helper(s) must be started, false otherwise

Definition at line 863 of file helper.cc.

References assert, DBG_CRITICAL, debugs, Helper::SessionBase::flags, Helper::SessionBase::index, Helper::SessionBase::replies, Helper::SessionBase::_helper_flags::shutdown, and Helper::SessionBase::stats.

◆ Make()

statefulhelper::Pointer statefulhelper::Make ( const char * name )

static

Definition at line 765 of file helper.cc.

◆ nextRequest()

Helper::Xaction * Client::nextRequest ( )

inherited

Returns: next request in the queue, or nil.

Definition at line 1295 of file helper.cc.

References Ping::stats.

Referenced by helperKickQueue(), and helperStatefulKickQueue().

◆ openSessions()

void statefulhelper::openSessions ( )

overridevirtual

Starts required helper process(es). The caller is responsible for checking that new processes are needed.

Reimplemented from Helper::Client.

Definition at line 329 of file helper.cc.

Referenced by StatefulEnqueue().

◆ overloaded()

bool Client::overloaded ( ) const

protectedinherited

Definition at line 493 of file helper.cc.

References Ping::stats.

◆ packStatsInto()

void Client::packStatsInto	(	Packable *	p,
		const char *	label = `nullptr`
	)		const

inherited

Definition at line 696 of file helper.cc.

References Packable::append(), Packable::appendf(), assert, current_time, int, dlink_node::next, PRIu64, Format::QuoteMimeBlob(), Ping::stats, and tvSubMsec().

Referenced by authenticateNegotiateStats(), and authenticateNTLMStats().

◆ prepSubmit()

bool Client::prepSubmit ( )

protectedinherited

prepares the helper for request submission returns true if and only if the submission should proceed may kill Squid if the helper remains overloaded for too long

Definition at line 526 of file helper.cc.

References Helper::ChildConfig::actDie, DBG_IMPORTANT, debugs, fatalf(), and squid_curtime.

◆ queueFull()

bool Client::queueFull ( ) const

protectedinherited

Definition at line 488 of file helper.cc.

References Ping::stats.

◆ reserveServer()

void statefulhelper::reserveServer ( helper_stateful_server * srv )

Definition at line 604 of file helper.cc.

References helper_stateful_server::clearReservation(), helper_stateful_server::reservationId, helper_stateful_server::reserve(), and helper_stateful_server::reserved().

Referenced by helperStatefulKickQueue().

◆ sessionClosed()

void Client::sessionClosed ( SessionBase & session )

inherited

Definition at line 901 of file helper.cc.

References DBG_IMPORTANT, and debugs.

Referenced by helper_stateful_server::HelperServerClosed(), and Helper::Session::HelperServerClosed().

◆ submit() [1/2]

void Client::submit	(	const char *	buf,
		HLPCB *	callback,
		void *	data
	)

protectedinherited

Definition at line 564 of file helper.cc.

References DBG_DATA, and debugs.

◆ submit() [2/2]

void statefulhelper::submit	(	const char *	buf,
		HLPCB *	callback,
		void *	data,
		const Helper::ReservationId &	reservation
	)

private

Definition at line 664 of file helper.cc.

References DBG_CRITICAL, DBG_DATA, debugs, helperStatefulDispatch(), Helper::Request::placeholder, Helper::Xaction::reply, Helper::Xaction::request, Helper::Reply::result, StatefulEnqueue(), StatefulGetFirstAvailable(), and Helper::TimedOut.

◆ submitRequest()

void Client::submitRequest ( Xaction * r )

inherited

Submits a request to the helper or add it to the queue if none of the servers is available.

Definition at line 455 of file helper.cc.

References Enqueue(), GetFirstAvailable(), and helperDispatch().

Referenced by helperReturnBuffer().

◆ syncQueueStats()

void Client::syncQueueStats ( )

protectedinherited

Definition at line 499 of file helper.cc.

References DBG_IMPORTANT, debugs, and squid_curtime.

◆ trySubmit() [1/2]

bool Client::trySubmit	(	const char *	buf,
		HLPCB *	callback,
		void *	data
	)

inherited

Definition at line 553 of file helper.cc.

Referenced by helperSubmit().

◆ trySubmit() [2/2]

bool statefulhelper::trySubmit	(	const char *	buf,
		HLPCB *	callback,
		void *	data,
		const Helper::ReservationId &	reservation
	)

private

If possible, submit request. Otherwise, either kill Squid or return false.

Definition at line 594 of file helper.cc.

◆ willOverload()

bool Client::willOverload ( ) const

inherited

whether the helper will be in "overloaded" state after one more request already overloaded helpers return true

Definition at line 754 of file helper.cc.

References GetFirstAvailable().

Friends And Related Function Documentation

◆ helperStatefulSubmit

void helperStatefulSubmit	(	const statefulhelper::Pointer &	hlp,
		const char *	buf,
		HLPCB *	callback,
		void *	cbData,
		const Helper::ReservationId &	reservation
	)

friend

Submit request or callback the caller with a Helper::Error error. If the reservation is not set then reserves a new helper.

Definition at line 586 of file helper.cc.

Member Data Documentation

◆ addr

Ip::Address Helper::Client::addr

inherited

Definition at line 120 of file helper.h.

◆ childs

ChildConfig Helper::Client::childs

inherited

Definition at line 118 of file helper.h.

Referenced by Enqueue(), GetFirstAvailable(), helperReturnBuffer(), helperShutdown(), helperStatefulShutdown(), StatefulEnqueue(), and StatefulGetFirstAvailable().

◆ cmdline

wordlist* Helper::Client::cmdline = nullptr

inherited

Definition at line 114 of file helper.h.

◆ droppedRequests

unsigned int Helper::Client::droppedRequests = 0

inherited

Definition at line 121 of file helper.h.

◆ eom

char Helper::Client::eom = '\n'

inherited

Definition at line 129 of file helper.h.

◆ id_name

const char* Helper::Client::id_name = nullptr

inherited

Definition at line 117 of file helper.h.

Referenced by Enqueue(), helperReturnBuffer(), helperShutdown(), helperStatefulServerDone(), helperStatefulShutdown(), and StatefulEnqueue().

◆ ipc_type

int Helper::Client::ipc_type = 0

inherited

Definition at line 119 of file helper.h.

◆ last_queue_warn

time_t Helper::Client::last_queue_warn = 0

inherited

Definition at line 123 of file helper.h.

Referenced by Enqueue(), and StatefulEnqueue().

◆ last_restart

time_t Helper::Client::last_restart = 0

inherited

Definition at line 124 of file helper.h.

◆ onTimedOutResponse

SBuf Helper::Client::onTimedOutResponse

inherited

Definition at line 128 of file helper.h.

◆ overloadStart

time_t Helper::Client::overloadStart = 0

inherited

Definition at line 122 of file helper.h.

◆ queue

std::queue<Xaction *> Helper::Client::queue

inherited

Definition at line 116 of file helper.h.

Referenced by Enqueue(), and StatefulEnqueue().

◆ reservations

Reservations statefulhelper::reservations

private

Definition at line 184 of file helper.h.

◆ retryBrokenHelper

bool Helper::Client::retryBrokenHelper = false

inherited

Definition at line 127 of file helper.h.

◆ retryTimedOut

bool Helper::Client::retryTimedOut = false

inherited

Definition at line 126 of file helper.h.

Referenced by helperReturnBuffer().

◆ servers

dlink_list Helper::Client::servers

inherited

Definition at line 115 of file helper.h.

Referenced by GetFirstAvailable(), helperShutdown(), helperStatefulShutdown(), and StatefulGetFirstAvailable().

◆ stats

struct Helper::Client::_stats Helper::Client::stats

inherited

Referenced by Enqueue(), helperReturnBuffer(), and StatefulEnqueue().

◆ timeout

time_t Helper::Client::timeout = 0

inherited

Definition at line 125 of file helper.h.

Referenced by helperReturnBuffer().

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

src/helper.h
src/helper.cc

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Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Private Member Functions

Private Attributes

Friends

Detailed Description

Member Typedef Documentation

◆ Pointer

◆ Reservations

Constructor & Destructor Documentation

◆ ~statefulhelper()

◆ statefulhelper()

Member Function Documentation

◆ callBack()

◆ cancelReservation()

◆ findServer()

◆ handleFewerServers()

◆ handleKilledServer()

◆ Make()

◆ nextRequest()

◆ openSessions()

◆ overloaded()

◆ packStatsInto()

◆ prepSubmit()

◆ queueFull()

◆ reserveServer()

◆ sessionClosed()

◆ submit() [1/2]

◆ submit() [2/2]

◆ submitRequest()

◆ syncQueueStats()

◆ trySubmit() [1/2]

◆ trySubmit() [2/2]

◆ willOverload()

Friends And Related Function Documentation

◆ helperStatefulSubmit

Member Data Documentation

◆ addr

◆ childs

◆ cmdline

◆ droppedRequests

◆ eom

◆ id_name

◆ ipc_type

◆ last_queue_warn

◆ last_restart

◆ onTimedOutResponse

◆ overloadStart

◆ queue

◆ reservations

◆ retryBrokenHelper

◆ retryTimedOut

◆ servers

◆ stats

◆ timeout

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