PIConnection Class Reference

Complex Input/Output point. More...

Inheritance diagram for PIConnection:

Public Member Functions
	PIConnection (const PIString &name=PIString::fromAscii("connection"))
	Constructs connection with name "name", or with default name = "connection".
	PIConnection (const PIString &config, const PIString &name)
	Constructs connection and configure it from config file "config" from section "name".
	PIConnection (PIString *string, const PIString &name)
	Constructs connection and configure it from config content "string" from section "name".
bool	configureFromConfig (const PIString &config, const PIString &name=PIString::fromAscii("connection"))
	Configure connection from config file "config" from section "name". Returns if configuration was successful. More...
bool	configureFromString (PIString *string, const PIString &name=PIString::fromAscii("connection"))
	Configure connection from config content "string" from section "name". Returns if configuration was successful. More...
PIString	makeConfig () const
	Returns config file section of current connection configuration.
PIIODevice *	addDevice (const PIString &full_path, PIIODevice::DeviceMode mode=PIIODevice::ReadWrite, bool start=false)
	Add device with full path "full_path", open mode "mode" to Device pool and connection. More...
bool	removeDevice (const PIString &full_path)
	Remove device with full path "full_path" from connection. More...
void	removeAllDevices ()
	Remove all device from connection. More...
PIIODevice *	deviceByFullPath (const PIString &full_path) const
	Returns device with full path "full_path" or null if there is no such device.
PIIODevice *	deviceByName (const PIString &name) const
	Returns device with name "name" or null if there is no such device.
PIVector< PIIODevice * >	boundedDevices () const
	Returns all devices bounded to this connection.
PIPacketExtractor *	addFilter (const PIString &name, const PIString &full_path_name, PIPacketExtractor::SplitMode mode=PIPacketExtractor::None)
	Add filter with name "name" to device with full path "full_path_name" or filter "full_path_name". More...
PIPacketExtractor *	addFilter (const PIString &name, const PIIODevice *dev, PIPacketExtractor::SplitMode mode=PIPacketExtractor::None)
	Add filter with name "name" to device "dev".
PIPacketExtractor *	addFilter (PIPacketExtractor *filter, const PIString &full_path_name)
	Add filter with "filter" to device "dev".
PIPacketExtractor *	addFilter (PIPacketExtractor *filter, const PIIODevice *dev)
	Add filter with "filter" to device "dev".
bool	removeFilter (const PIString &name, const PIString &full_path_name)
	Remove from filter with name "name" device with full path "full_path_name" or filter "full_path_name". More...
bool	removeFilter (const PIString &name, const PIIODevice *dev)
	Remove from filter with name "name" device or filter "dev".
bool	removeFilter (const PIString &name)
	Remove filter with name "name". Returns if filter was removed.
void	removeAllFilters ()
	Remove all filters from connection.
PIVector< PIPacketExtractor * >	filters () const
	Returns all filters of connection.
PIStringList	filterNames () const
	Returns all filter names of connection.
PIPacketExtractor *	filter (const PIString &name) const
	Returns PIPacketExtractor * assosiated with filter "name" or null if there is no such filter.
PIVector< PIIODevice * >	filterBoundedDevices (const PIString &name) const
	Returns all devices bounded to filter "name".
bool	addChannel (const PIString &name_from, const PIString &name_to)
	Add to connection channel from "name_from" to "name_to". More...
bool	addChannel (const PIString &name_from, const PIIODevice *dev_to)
	Add to connection channel from "name_from" to "dev_to".
bool	addChannel (const PIIODevice *dev_from, const PIString &name_to)
	Add to connection channel from "dev_from" to "name_to".
bool	addChannel (const PIIODevice *dev_from, const PIIODevice *dev_to)
	Add to connection channel from "dev_from" to "dev_to".
bool	removeChannel (const PIString &name_from, const PIString &name_to)
	Remove from connection channel from "name_from" to "name_to". More...
bool	removeChannel (const PIString &name_from, const PIIODevice *dev_to)
	Remove from connection channel from "name_from" to "dev_to".
bool	removeChannel (const PIIODevice *dev_from, const PIString &name_to)
	Remove from connection channel from "dev_from" to "name_to".
bool	removeChannel (const PIIODevice *dev_from, const PIIODevice *dev_to)
	Remove from connection channel from "dev_from" to "dev_to".
bool	removeChannel (const PIString &name_from)
	Remove from connection all channels from "name_from". More...
bool	removeChannel (const PIIODevice *dev_from)
	Remove from connection all channels from "dev_from".
void	removeAllChannels ()
	Remove from connection all channels.
PIVector< PIPair< PIString, PIString > >	channels () const
	Returns all channels of this connection as full pathes or filter names pair array (from, to)
void	addSender (const PIString &name, const PIString &full_path_name, float frequency, bool start=false)
	Add to connection sender with name "name" device with full path "full_path". More...
void	addSender (const PIString &name, const PIIODevice *dev, float frequency, bool start=false)
	Add to connection sender with name "name" device "dev".
bool	removeSender (const PIString &name, const PIString &full_path_name)
	Remove from sender with name "name" device with full path "full_path_name". More...
bool	removeSender (const PIString &name, const PIIODevice *dev)
	Remove from sender with name "name" device "dev".
bool	removeSender (const PIString &name)
	Remove sender with name "name", returns if sender was removed.
bool	setSenderFixedData (const PIString &name, const PIByteArray &data)
	Set sender "name" fixed send data "data", returns if sender exists.
bool	clearSenderFixedData (const PIString &name)
	Remove sender "name" fixed send data, returns if sender exists.
PIByteArray	senderFixedData (const PIString &name) const
	Returns sender "name" fixed send data.
float	senderFrequency (const PIString &name) const
	Returns sender "name" timer frequency, -1 if there is no such sender, or 0 if sender is not started yet.
void	removeAllSenders ()
	Remove from connection all senders.
void	startThreadedRead (const PIString &full_path_name)
	Start read thread of device with full path "full_path".
void	startThreadedRead (const PIIODevice *dev)
	Start read thread of device "dev".
void	startAllThreadedReads ()
	Start read threads of all Device pool device.
void	startSender (const PIString &name)
	Start sender "name" timer.
void	startAllSenders ()
	Start all senders timers.
void	start ()
	Start all read threads and senders.
void	stopThreadedRead (const PIString &full_path_name)
	Stop read thread of device with full path "full_path".
void	stopThreadedRead (const PIIODevice *dev)
	Stop read thread of device "dev".
void	stopAllThreadedReads ()
	Stop read threads of all Device pool device.
void	stopSender (const PIString &name)
	Stop sender "name" timer.
void	stopAllSenders ()
	Stop all senders timers.
void	stop ()
	Stop all read threads and senders.
void	destroy ()
	Stop connection and remove all devices.
bool	isEmpty () const
	Returns if there are no devices in this connection.
PIDiagnostics *	diagnostic (const PIString &full_path_name) const
	Returns PIDiagnostics * assosiated with device with full path "full_path_name", name "full_path_name" or filter "full_path_name".
PIDiagnostics *	diagnostic (const PIIODevice *dev) const
	Returns PIDiagnostics * assosiated with device or filter "dev".
int	writeByFullPath (const PIString &full_path, const PIByteArray &data)
	Write data "data" to device with full path "full_path" and returns result of write() function of device.
int	writeByName (const PIString &name, const PIByteArray &data)
	Write data "data" to device with name "name" and returns result of write() function of device.
int	write (PIIODevice *dev, const PIByteArray &data)
	Write data "data" to device "dev" and returns result of write() function of device.
Public Member Functions inherited from PIObject
	PIObject (const PIString &name=PIString())
	Contructs PIObject with name "name".
PIString	name () const
	Returns object name.
virtual const char *	className () const
	Returns object class name.
virtual const char *	parentClassName () const
	Returns parent class name.
bool	debug () const
	Return if piCoutObj of this object is active.
void	setName (const PIString &name)
	Set object name.
void	setDebug (bool debug)
	Set object piCoutObj active.
PIVariant	property (const char *name) const
	Returns property with name "name".
void	setProperty (const char *name, const PIVariant &value)
	Set property with name "name" to "value". If there is no such property in object it will be added.
bool	isPropertyExists (const char *name) const
	Returns if property with name "name" exists.
PIStringList	scopeList () const
	Returns subclass scope of this object (including this class name)
void	piDisconnect (const PIString &sig, PIObject *dest, void *ev_h)
	Disconnect object from all connections with event name "sig", connected to destination object "dest" and handler "ev_h".
void	piDisconnect (const PIString &sig, PIObject *dest)
	Disconnect object from all connections with event name "sig", connected to destination object "dest".
void	piDisconnect (const PIString &sig)
	Disconnect object from all connections with event name "sig".
bool	isPIObject () const
	Returns if this is valid PIObject (check signature)
template<typename T >
bool	isTypeOf () const
	Returns if this is valid PIObject subclass "T" (check signature and classname)
template<typename T >
T *	cast () const
	Returns cast to T if this is valid subclass "T" (check by isTypeOf()) or "nullptr".
void	callQueuedEvents ()
	Execute all posted events from CONNECTU_QUEUED connections.
bool	maybeCallQueuedEvents ()
	Check if any CONNECTU_QUEUED connections to this object and execute them. More...
void	deleteLater ()
	Mark object to delete. More...
void	deleted (PIObject *o)
	Raise before object delete. More...

Static Public Member Functions
static PIVector< PIConnection * >	allConnections ()
	Returns all connections in application.
static PIVector< PIIODevice * >	allDevices ()
	Returns all devices in Device pool.
static bool	setFakeMode (bool yes)
	Set Device pool fake mode to "yes" and returns previous mode.
static bool	isFakeMode ()
	Returns if Device pool works in fake mode.
Static Public Member Functions inherited from PIObject
static void	piDisconnect (PIObject *src, const PIString &sig, PIObject *dest, void *ev_h)
	Disconnect object "src" from all connections with event name "sig", connected to destination object "dest" and handler "ev_h".
static void	piDisconnect (PIObject *src, const PIString &sig, PIObject *dest)
	Disconnect object "src" from all connections with event name "sig", connected to destination object "dest".
static void	piDisconnect (PIObject *src, const PIString &sig)
	Disconnect object "src" from all connections with event name "sig".
static PIObject *	findByName (const PIString &name)
	Returns PIObject* with name "name" or 0, if there is no object found.
static bool	isPIObject (const PIObject *o)
	Returns if "o" is valid PIObject (check signature)
template<typename T >
static bool	isTypeOf (const PIObject *o)
	Returns if "o" is valid PIObject subclass "T" (check signature and classname)

Protected Member Functions
virtual void	dataReceived (const PIString &from, const PIByteArray &data)
	Executes on data received from device with full path "from".
virtual void	packetReceived (const PIString &from, const PIByteArray &data)
	Executes on packet received from filter with name "from".
virtual PIByteArray	senderData (const PIString &sender_name)
	You should returns data for sender "sender_name".
Protected Member Functions inherited from PIObject
PIObject *	emitter () const
	Returns PIObject* which has raised an event. This value is correct only in definition of some event handler.
virtual void	propertyChanged (const char *name)
	Virtual function executes after property with name "name" has been changed.

Events
void	dataReceivedEvent (const PIString &from, const PIByteArray &data)
	Raise on data received from device with full path "from".
void	packetReceivedEvent (const PIString &from, const PIByteArray &data)
	Raise on packet received from filter with name "from".
void	qualityChanged (const PIIODevice *dev, PIDiagnostics::Quality new_quality, PIDiagnostics::Quality old_quality)
	Raise on diagnostic quality of device "device" changed from "old_quality" to "new_quality".

Additional Inherited Members
Related Functions inherited from PIObject
#define	piCoutObj
	Macro used for conditional (piDebug && PIObject::debug()) output to PICout(StdOut) for subclasses of PIObject.
#define	piCerrObj
	Macro used for conditional (piDebug && PIObject::debug()) output to PICout(StdErr) for subclasses of PIObject.
#define	PIOBJECT(name)
	You should use this macro after class declaration to use EVENT and EVENT_HANDLER and correct piCoutObj output.
#define	PIOBJECT_SUBCLASS(name, parent)
	You should use this macro after class declaration to use EVENT and EVENT_HANDLER of parent class, and scopeList()
#define	EVENT_HANDLER0(ret, name)   ret name()
	Declare event handler with name "name" and return type "ret", ret name()
#define	EVENT_HANDLER1(ret, name, type0, var0)   ret name(type0 var0)
	Declare event handler with name "name" and return type "ret", ret name(type0 var0)
#define	EVENT_HANDLER2(ret, name, type0, var0, type1, var1)   ret name(type0 var0, type1 var1)
	Declare event handler with name "name" and return type "ret", ret name(type0 var0, type1 var1)
#define	EVENT_HANDLER3(ret, name, type0, var0, type1, var1, type2, var2)   ret name(type0 var0, type1 var1, type2 var2)
	Declare event handler with name "name" and return type "ret", ret name(type0 var0, type1 var1, type2 var2)
#define	EVENT_HANDLER4(ret, name, type0, var0, type1, var1, type2, var2, type3, var3)    ret name(type0 var0, type1 var1, type2 var2, type3 var3)
	Declare event handler with name "name" and return type "ret", ret name(type0 var0, type1 var1, type2 var2, type3 var3)
#define	EVENT_HANDLER   EVENT_HANDLER0
	Synonym of EVENT_HANDLER0.
#define	EVENT_VHANDLER0(ret, name)   virtual ret name()
	Declare virtual event handler with name "name" and return type "ret", virtual ret name()
#define	EVENT_VHANDLER1(ret, name, type0, var0)   virtual ret name(type0 var0)
	Declare virtual event handler with name "name" and return type "ret", virtual ret name(type0 var0)
#define	EVENT_VHANDLER2(ret, name, type0, var0, type1, var1)   virtual ret name(type0 var0, type1 var1)
	Declare virtual event handler with name "name" and return type "ret", virtual ret name(type0 var0, type1 var1)
#define	EVENT_VHANDLER3(ret, name, type0, var0, type1, var1, type2, var2)   virtual ret name(type0 var0, type1 var1, type2 var2)
	Declare virtual event handler with name "name" and return type "ret", virtual ret name(type0 var0, type1 var1, type2 var2)
#define	EVENT_VHANDLER4(ret, name, type0, var0, type1, var1, type2, var2, type3, var3)    virtual ret name(type0 var0, type1 var1, type2 var2, type3 var3)
	Declare virtual event handler with name "name" and return type "ret", virtual ret name(type0 var0, type1 var1, type2 var2, type3 var3)
#define	EVENT_VHANDLER   EVENT_VHANDLER0
	Synonym of EVENT_VHANDLER0.
#define	EVENT0(name)   void name();
	Declare event with name "name", void name();.
#define	EVENT1(name, type0, var0)   void name(type0 var0);
	Declare event with name "name", void name(type0 var0);.
#define	EVENT2(name, type0, var0, type1, var1)   void name(type0 var0, type1 var1);
	Declare event with name "name", void name(type0 var0, type1 var1);.
#define	EVENT3(name, type0, var0, type1, var1, type2, var2)   void name(type0 var0, type1 var1, type2 var2);
	Declare event with name "name", void name(type0 var0, type1 var1, type2 var2);.
#define	EVENT4(name, type0, var0, type1, var1, type2, var2, type3, var3)   void name(type0 var0, type1 var1, type2 var2, type3 var3);
	Declare event with name "name", void name(type0 var0, type1 var1, type2 var2, type3 var3);.
#define	EVENT   EVENT0
	Synonym of EVENT0.
#define	CONNECTU(src, event, dest, handler)
	Connect event "event" from object "src" to event handler or event "handler" of object "dest". More...
#define	CONNECTU_QUEUED(src, event, dest, handler, performer)
	Connect event "event" from object "src" to event handler or event "handler" of object "dest". More...
#define	CONNECTL(src, event, functor)
	Connect event "event" from object "src" to lambda-expression "functor". More...
#define	CONNECT0(ret, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" with check of event and handler exists. More...
#define	CONNECT1(ret, type0, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" with check of event and handler exists. More...
#define	CONNECT2(ret, type0, type1, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" with check of event and handler exists. More...
#define	CONNECT3(ret, type0, type1, type2, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" with check of event and handler exists. More...
#define	CONNECT4(ret, type0, type1, type2, type3, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" with check of event and handler exists. More...
#define	CONNECT   CONNECT0
	Synonym of CONNECT0. More...
#define	WEAK_CONNECT0(ret, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" without check of event exists. More...
#define	WEAK_CONNECT1(ret, type0, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" without check of event exists. More...
#define	WEAK_CONNECT2(ret, type0, type1, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" without check of event exists. More...
#define	WEAK_CONNECT3(ret, type0, type1, type2, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" without check of event exists. More...
#define	WEAK_CONNECT4(ret, type0, type1, type2, type3, src, event, dest, handler)
	Connect event "event" from object "src" to event handler "handler" with return type "ret" from object "dest" without check of event exists. More...
#define	WEAK_CONNECT   WEAK_CONNECT0
	Synonym of WEAK_CONNECT0. More...
#define	DISCONNECT0(ret, src, event, dest, handler)
	piDisconnect event "event" from object "src" from event handler "handler" with return type "ret" from object "dest"
#define	DISCONNECT1(ret, type0, src, event, dest, handler)
	piDisconnect event "event" from object "src" from event handler "handler" with return type "ret" from object "dest"
#define	DISCONNECT2(ret, type0, type1, src, event, dest, handler)
	piDisconnect event "event" from object "src" from event handler "handler" with return type "ret" from object "dest"
#define	DISCONNECT3(ret, type0, type1, type2, src, event, dest, handler)
	piDisconnect event "event" from object "src" from event handler "handler" with return type "ret" from object "dest"
#define	DISCONNECT4(ret, type0, type1, type2, type3, src, event, dest, handler)
	piDisconnect event "event" from object "src" from event handler "handler" with return type "ret" from object "dest"
#define	DISCONNECT   DISCONNECT0
	Synonym of DISCONNECT0.
#define	HANDLER(handler)
	Returns pointer to events handler "handler".

Detailed Description

Complex Input/Output point.

Synopsis

PIConnection provides abstract layer over physical devices, filtering and connecting data streams. Each PIConnection works through Device Pool, so several PIConnections can read from single physical device. General scheme:

Device pool concept

Device pool is static object, single for each application, which contains unique devices. Each PIConnection works with real devices through Device pool. Each device has assosiated thread for read and it can be started or stopped with PIConnection functions startThreadedRead() and stopThreadedRead().

Filters

PIConnection filter is a PIPacketExtractor and assosiated array of devices or other filters. When read thread is successfully read from device this data can be passed to one or more filters. Each filter has name and filter names should be unique. You can use this name for access to PIPacketExtractor* with function filter(), or get array of assosiated devices and filters with function filterBoundedDevices(). One filter can receive data from several sources, and can be bounded to several filters.

Diagnostics

PIConnection create PIDiagnostics for each device or filter. You can access to these objects with functions diagnostic().

Senders

PIConnection can send data to devices with named timers ("senders"). You can create sender or add device to sender with function addSender(). Each sender has internal timer and every tick execute virtual function senderData(). Returns value of this function sended to bounded devices. You can assign fixed send data to sender with function setSenderFixedData(). In this case sender will NOT execute senderData(), but send assigned data.

Configuration

You can create PIConnection from config file section or configure it later with function configureFromConfig(). Devices describes with its full pathes, for details see Creating devices by unambiguous string. Example:

Also PIConnection can create PIString with its configuration with function makeConfig(). This string can be directly inserted into the config file.

Member Function Documentation

configureFromConfig()

bool PIConnection::configureFromConfig	(	const PIString &	config,
		const PIString &	name = PIString::fromAscii ("connection")
	)

Configure connection from config file "config" from section "name". Returns if configuration was successful.

Warning: all devices, filters and channels removed before configure!

configureFromString()

bool PIConnection::configureFromString	(	PIString *	string,
		const PIString &	name = PIString::fromAscii ("connection")
	)

Configure connection from config content "string" from section "name". Returns if configuration was successful.

Warning: all devices, filters and channels removed before configure!

addDevice()

PIIODevice * PIConnection::addDevice	(	const PIString &	full_path,
		PIIODevice::DeviceMode	mode = PIIODevice::ReadWrite,
		bool	start = false
	)

Add device with full path "full_path", open mode "mode" to Device pool and connection.

Returns pointer to device or null if device can not be created. If "start" is true, read thread is started immediately. Else, you can start read thread with functions startThreadedRead() or startAllThreadedReads(). By default, read thread doesn`t start

removeDevice()

bool PIConnection::removeDevice

(

const PIString &

full_path

)

Remove device with full path "full_path" from connection.

Returns if device was removed. If there is no connection bounded to this device, it will be removed from Device pool

removeAllDevices()

void PIConnection::removeAllDevices

(

)

Remove all device from connection.

If there is no connection bounded to there devices, they removed from Device pool

addFilter()

PIPacketExtractor * PIConnection::addFilter	(	const PIString &	name,
		const PIString &	full_path_name,
		PIPacketExtractor::SplitMode	mode = PIPacketExtractor::None
	)

Add filter with name "name" to device with full path "full_path_name" or filter "full_path_name".

If there is no filter with name "name", connection create new with split mode "mode" and bound to it device "full_path_name" or filter "full_path_name". If filter with name "name" already exists, device "full_path_name" or filter "full_path_name" add to this filter. This function returns PIPacketExtractor * assosiated with this filter
Attention! "mode" is altual olny if new filter was created!

removeFilter()

bool PIConnection::removeFilter	(	const PIString &	name,
		const PIString &	full_path_name
	)

Remove from filter with name "name" device with full path "full_path_name" or filter "full_path_name".

If there is no devices bounded to this filter, it will be removed. Returns if device was removed

addChannel()

bool PIConnection::addChannel	(	const PIString &	name_from,
		const PIString &	name_to
	)

Add to connection channel from "name_from" to "name_to".

"name_from" and "name_to" can be full pathes of devices or device names or filter names. Returns false if there if no such device or filter, else create channel and returns true

removeChannel() [1/2]

bool PIConnection::removeChannel	(	const PIString &	name_from,
		const PIString &	name_to
	)

Remove from connection channel from "name_from" to "name_to".

"name_from" and "name_to" can be full pathes of devices or filter names. Returns false if there if no such device or filter, else remove channel and returns true

removeChannel() [2/2]

bool PIConnection::removeChannel

(

const PIString &

name_from

)

Remove from connection all channels from "name_from".

"name_from" can be full path of device or filter name. Returns false if there if no such device or filter, else remove channels and returns true

addSender()

void PIConnection::addSender	(	const PIString &	name,
		const PIString &	full_path_name,
		float	frequency,
		bool	start = false
	)

Add to connection sender with name "name" device with full path "full_path".

If there is no sender with name "name", connection create new, bound to it device "full_path_name" and start sender timer with frequency "frequency". If sender with name "name" already exists, device "full_path_name" add to this sender If "start" is true, sender is started immediately. Else, you can start sender with functions startSender()
Attention! "frequency" is actual olny if new sender was created!

removeSender()

bool PIConnection::removeSender	(	const PIString &	name,
		const PIString &	full_path_name
	)

Remove from sender with name "name" device with full path "full_path_name".

If there is no devices bounded to this sender, it will be removed. Returns if sender was removed