The Cutelyst Engine. More...

#include <Cutelyst/Engine>

Inheritance diagram for Cutelyst::Engine:

[legend]

Signals
void	processRequestAsync (Cutelyst::EngineRequest *request)

Public Member Functions
	Engine (Application *app, int workerCore, const QVariantMap &opts)

virtual	~Engine ()

Application *	app () const

QVariantMap	config (const QString &entity) const

bool	isZeroWorker () const

QVariantMap	opts () const

void	processRequest (EngineRequest *request)

void	setConfig (const QVariantMap &config)

int	workerCore () const

virtual int	workerId () const =0

Public Member Functions inherited from QObject
	QObject (QObject *parent)

bool	blockSignals (bool block)

const QObjectList &	children () const const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectInfo () const const

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (Qt::FindChildOptions options) const const

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isQuickItemType () const const

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_DISABLE_COPY (Class)

	Q_DISABLE_COPY_MOVE (Class)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_GADGET_EXPORT (EXPORT_MACRO)

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_MOC_INCLUDE Q_MOC_INCLUDE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setObjectName (QAnyStringView name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	signalsBlocked () const const

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)

QThread *	thread () const const

Static Public Member Functions
static const char *	httpStatusMessage (quint16 status, int *len=nullptr)

static QVariantMap	loadIniConfig (const QString &filename)

static QVariantMap	loadJsonConfig (const QString &filename)

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

QString	tr (const char sourceText, const char disambiguation, int n)

Protected Member Functions
Headers &	defaultHeaders ()

bool	initApplication ()

bool	postForkApplication ()

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const const

virtual void	timerEvent (QTimerEvent *event)

Friends
class	Application

class	Response

Additional Inherited Members
Public Attributes inherited from QObject
typedef	QObjectList

Properties inherited from QObject
	objectName

Detailed Description

This class is responsible receiving the request and sending the response. It must be reimplemented by real HTTP engines due some pure virtual methods.

The subclass must create an engine per thread (worker core), if the Application passed to the constructor has a worker core greater than 0 it will issue a new Application instance, failing to do so a fatal error is generated (usually indicating that the Application does not have a Q_INVOKABLE constructor).

Definition at line 19 of file engine.h.

Constructor & Destructor Documentation

◆ Engine()

Engine::Engine	(	Cutelyst::Application *	app,
		int	workerCore,
		const QVariantMap &	opts
	)

explicit

Constructs an Engine object, where app is the application that might be used to create new instances if workerCore is greater than 1, opts is the options loaded by the engine subclass.

Parameters

app	The application loaded
workerCore	The thread number
opts	The configuation options

Definition at line 42 of file engine.cpp.

References app(), QObject::connect(), opts(), processRequest(), processRequestAsync(), Qt::QueuedConnection, and workerCore().

◆ ~Engine()

Engine::~Engine ( )

virtual

Destroys the Engine object.

Definition at line 55 of file engine.cpp.

Member Function Documentation

◆ app()

Application * Engine::app ( ) const

Returns the application associated with this engine.

Definition at line 60 of file engine.cpp.

Referenced by Engine().

◆ config()

QVariantMap Engine::config ( const QString & entity ) const

Returns a map of key value pairs for the configuration entitiy (section) from your application’s configuration file.

See also: Configure your application

Definition at line 263 of file engine.cpp.

Referenced by Cutelyst::MemcachedSessionStore::MemcachedSessionStore(), setConfig(), Cutelyst::Session::setup(), Cutelyst::CSRFProtection::setup(), Cutelyst::Memcached::setup(), Cutelyst::StaticCompressed::setup(), Cutelyst::LangSelect::setup(), and Cutelyst::Application::setup().

◆ defaultHeaders()

Headers & Engine::defaultHeaders ( )

protected

This is the HTTP default response headers that each request gets.

Definition at line 245 of file engine.cpp.

◆ httpStatusMessage()

const char * Engine::httpStatusMessage	(	quint16	status,
		int *	len = `nullptr`
	)

static

Returns the HTTP status message for the given status. If len is not a nullptr, the length of the returned string will be stored to *len.

Definition at line 104 of file engine.cpp.

References QByteArray::number().

Referenced by Cutelyst::ProtoRequestHttp::writeHeaders().

◆ initApplication()

bool Engine::initApplication ( )

protected

This method inits the application and calls init on the engine. It must be called on the engine's thread. Returns true on success.

Definition at line 73 of file engine.cpp.

References QThread::currentThread(), and QObject::thread().

Referenced by Cutelyst::ServerEngine::init().

◆ isZeroWorker()

bool Cutelyst::Engine::isZeroWorker ( ) const

inline

Returns true if this is the Zero worker, ie if workerId() == 0 and workerCore() == 0.

Note: the value returned from this function is only valid when postFork() is issued.

Definition at line 156 of file engine.h.

References workerCore(), and workerId().

◆ loadIniConfig()

QVariantMap Engine::loadIniConfig ( const QString & filename )

static

Returns a QVariantMap with the INI parsed from filename.

Definition at line 275 of file engine.cpp.

References QSettings::beginGroup(), QSettings::childGroups(), QSettings::childKeys(), QSettings::endGroup(), QSettings::IniFormat, QList::insert(), QSettings::NoError, QSettings::status(), and QSettings::value().

◆ loadJsonConfig()

QVariantMap Engine::loadJsonConfig ( const QString & filename )

static

Returns a QVariantMap with the JSON parsed from filename.

Definition at line 299 of file engine.cpp.

References QJsonDocument::fromJson(), QFile::open(), QIODevice::readAll(), QIODeviceBase::ReadOnly, QIODeviceBase::Text, QVariant::toMap(), and QJsonDocument::toVariant().

◆ opts()

QVariantMap Engine::opts ( ) const

Returns the engine options set in the constructor.

Definition at line 257 of file engine.cpp.

Referenced by Engine().

◆ postForkApplication()

bool Engine::postForkApplication ( )

protected

Subclasses must be call after the engine forks by the worker thread, if no forking is involved it must be called once the worker thread has started.

For convenience QThread::currentThread() has it's object name set with the worker core number.

Returns: true if the engine should use this process

Definition at line 90 of file engine.cpp.

References QThread::currentThread(), QString::number(), and QObject::setObjectName().

◆ processRequest()

void Engine::processRequest ( EngineRequest * request )

Process the request. The caller must delete the context when the request is finished.

This method allows for engines to keep the Context alive while processing websocket data.

Definition at line 251 of file engine.cpp.

Referenced by Engine().

◆ processRequestAsync

void Cutelyst::Engine::processRequestAsync ( Cutelyst::EngineRequest * request )

signal

Process the requst asynchronous. The caller must delete the context when the request is finished.

This method allows for engines to keep the Context alive while processing websocket data.

Referenced by Engine().

◆ setConfig()

void Engine::setConfig ( const QVariantMap & config )

Sets the configuration to be used by Application.

Definition at line 269 of file engine.cpp.

References config().

◆ workerCore()

int Engine::workerCore ( ) const

Returns the worker core set when constructing the engine.

Each worker process migth have a number of worker cores (threads), a single process with two worker threads will return 0 and 1 for each of the thread respectively.

Definition at line 67 of file engine.cpp.

Referenced by Engine(), isZeroWorker(), and Cutelyst::Application::setup().

◆ workerId()

virtual int Cutelyst::Engine::workerId ( ) const

pure virtual

Reimplement this to get the workerId of the engine subclass, this is the same as processes id.

The id is the number of the spawned engine process, a single process workerId = 0, two process 0 for the first 1 for the second.

Note: The value returned from this function is only valid when postFork() is issued.

Implemented in Cutelyst::ServerEngine.

Referenced by isZeroWorker().

Friends And Related Symbol Documentation

◆ Application

friend class Application

friend

Definition at line 147 of file engine.h.

◆ Response

friend class Response

friend

Definition at line 148 of file engine.h.

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Engine()

◆ ~Engine()

Member Function Documentation

◆ app()

◆ config()

◆ defaultHeaders()

◆ httpStatusMessage()

◆ initApplication()

◆ isZeroWorker()

◆ loadIniConfig()

◆ loadJsonConfig()

◆ opts()

◆ postForkApplication()

◆ processRequest()

◆ processRequestAsync

◆ setConfig()

◆ workerCore()

◆ workerId()

Friends And Related Symbol Documentation

◆ Application

◆ Response