PIBinaryLog Class Reference

Class for read and write binary data to logfile, and playback this data in realtime, or custom speed. More...

Inheritance diagram for PIBinaryLog:

Classes
struct	BinLogIndex
	Struct contains position, ID and timestamp of record in file. More...
struct	BinLogInfo
	Struct contains full information about Binary Log file and about all Records using map of BinLogRecordInfo. More...
struct	BinLogRecordInfo
	Struct contains information about all records with same ID. More...

Public Types
enum	PlayMode { PlayRealTime, PlayVariableSpeed, PlayStaticDelay }
	Play modes for PIBinaryLog. More...
enum	SplitMode { SplitNone, SplitTime, SplitSize, SplitCount }
	Different split modes for writing PIBinaryLog, which can separate files by size, by time or by records count. More...
Public Types inherited from PIIODevice
enum	DeviceMode { ReadOnly = 0x01, WriteOnly = 0x02, ReadWrite = 0x03 }
	Open modes for PIIODevice. More...
Public Types inherited from PIThread
enum	Priority {   piLowerst, piLow, piNormal, piHigh,   piHighest }
	Priority of thread. More...

Public Member Functions
PlayMode	playMode () const
	Current PlayMode.
SplitMode	splitMode () const
	Current SplitMode.
PIString	logDir () const
	Current directory where billogs wiil be saved.
PIString	filePrefix () const
	Returns current file prefix.
int	defaultID () const
	Default ID, used in write function.
double	playSpeed () const
	Returns current play speed.
PISystemTime	playDelay () const
	Returns current play delay.
PISystemTime	splitTime () const
	Returns current binlog file split time.
llong	splitFileSize () const
	Returns current binlog file split size.
int	splitRecordCount () const
	Returns current binlog file split records count.
bool	rapidStart () const
	Returns if rapid start enabled.
void	createNewFile (const PIString &path)
	Create binlog file with Filename = path.
void	setPlayMode (PlayMode mode)
	Set PlayMode.
void	setSplitMode (SplitMode mode)
	Set SplitMode.
void	setLogDir (const PIString &path)
	Set path to directory where binlogs will be saved.
void	setFilePrefix (const PIString &prefix)
	Set file prefix, used to.
void	setDefaultID (int id)
	Set defaultID, used in write function.
void	setRapidStart (bool enabled)
	If enabled BinLog ThreadedRead starts without delay for first record, i.e. first record will be readed immediately.
void	setPlaySpeed (double speed)
void	setPlayDelay (const PISystemTime &delay)
void	setPlayRealTime ()
	Set playMode to PlayRealTime.
void	setSplitTime (const PISystemTime &time)
void	setSplitFileSize (llong size)
void	setSplitRecordCount (int count)
int	writeBinLog (int id, PIByteArray data)
	Write one record to BinLog file, with ID = id, id must be greather than 0.
int	writeBinLog (int id, const void *data, int size)
	Write one record to BinLog file, with ID = id, id must be greather than 0.
int	writeBinLog_raw (int id, const PISystemTime &time, const PIByteArray &data)
	Write one RAW record to BinLog file, with ID = id, Timestamp = time.
int	writeCount () const
	Returns count of writed records.
PIByteArray	readBinLog (int id=0, PISystemTime *time=0)
	Read one record from BinLog file, with ID = id, if id = 0 than any id will be readed.
int	readBinLog (int id, void *read_to, int max_size, PISystemTime *time=0)
	Read one record from BinLog file, with ID = id, if id = 0 than any id will be readed.
llong	logSize () const
	Returns binary log file size.
bool	isEnd () const
	Return true, if position at the end of BinLog file.
bool	isEmpty () const
	Returns if BinLog file is empty.
int	lastReadedID () const
	Returns if BinLog file is empty.
int	read (void *read_to, int max_size)
	Set position in file to reading/playing. More...
int	write (const void *data, int size)
	Write one record to BinLog file, with ID = "defaultID".
void	restart ()
	Go to begin of BinLog file.
PIString	constructFullPath () const
	Reimplement to construct full unambiguous string, describes this device, default returns fullPathPrefix() + "://" + path()
BinLogInfo	logInfo () const
	Get binlog info BinLogInfo.
const PIVector< BinLogIndex > &	logIndex () const
	Get binlog index BinLogIndex, need createIndex before getting index.
bool	createIndex ()
	TODO: Think about index positions. More...
void	seekTo (int rindex)
	Go to record #index.
bool	seek (const PISystemTime &time)
	Go to nearest record.
int	pos () const
	Get current record index (position record in file)
Public Member Functions inherited from PIIODevice
	PIIODevice ()
	Constructs a empty PIIODevice.
	PIIODevice (const PIString &path, DeviceMode mode=ReadWrite)
	Constructs a PIIODevice with path and mode. More...
DeviceMode	mode () const
	Current open mode of device.
void	setMode (DeviceMode m)
	Set open mode of device.
PIString	path () const
	Current path of device.
void	setPath (const PIString &path)
	Set path of device.
bool	isReadable () const
	Return true if mode is ReadOnly or ReadWrite.
bool	isWriteable () const
	Return true if mode is WriteOnly or ReadWrite.
bool	isOpened () const
	Return true if device is successfully opened.
bool	isClosed () const
	Return true if device is closed.
virtual bool	canRead () const
	Return true if device can read now.
virtual bool	canWrite () const
	Return true if device can write now.
void	setReopenEnabled (bool yes=true)
	Set execution of open enabled while threaded read on closed device.
void	setReopenTimeout (int msecs)
	Set timeout in milliseconds between open tryings if reopen is enabled.
bool	isReopenEnabled () const
	Return reopen enable.
int	reopenTimeout ()
	Return reopen timeout.
void	setThreadedReadSlot (ReadRetFunc func)
	Set "threaded read slot". More...
void	setThreadedReadData (void *d)
	Set custom data that will be passed to "threaded read slot".
void	setThreadedReadBufferSize (int new_size)
	Set size of threaded read buffer. More...
int	threadedReadBufferSize () const
	Return size of threaded read buffer.
const uchar *	threadedReadBuffer () const
	Return content of threaded read buffer.
void *	threadedReadData () const
	Return custom data that will be passed to "threaded read slot".
bool	isThreadedRead () const
	Return true if threaded read is started.
void	startThreadedRead ()
	Start threaded read.
void	startThreadedRead (ReadRetFunc func)
	Start threaded read and assign "threaded read slot" to "func".
void	stopThreadedRead ()
	Stop threaded read.
bool	isThreadedWrite () const
	Return true if threaded write is started.
void	startThreadedWrite ()
	Start threaded write.
void	stopThreadedWrite ()
	Stop threaded write.
void	clearThreadedWriteQueue ()
	Clear threaded write task queue.
void	start ()
	Start both threaded read and threaded write.
void	stop (bool wait=false)
	Stop both threaded read and threaded write and if "wait" block until both threads are stop.
PIByteArray	read (int max_size)
	Read from device maximum "max_size" bytes and return them as PIByteArray.
PIByteArray	readForTime (double timeout_ms)
	Read from device for "timeout_ms" milliseconds and return readed data as PIByteArray. Timeout should to be greater than 0.
int	write (const PIByteArray &data)
	Write "data" to device.
ullong	writeThreaded (const void *data, int max_size)
	Add task to threaded write queue and return task ID.
ullong	writeThreaded (const PIByteArray &data)
	Add task to threaded write queue and return task ID.
bool	configure (const PIString &config_file, const PIString &section, bool parent_section=false)
	Configure device from section "section" of file "config_file", if "parent_section" parent section also will be read.
bool	open ()
	Open device.
bool	open (const PIString &_path)
	Open device with path "path".
bool	open (const DeviceMode &_mode)
	Open device with mode "mode".
bool	open (const PIString &_path, const DeviceMode &_mode)
	Open device with path "path" and mode "mode".
bool	close ()
	Close device.
bool	initialize ()
	Initialize device.
virtual void	flush ()
	Immediate write all buffers.
void	opened ()
	Raise if succesfull open.
void	closed ()
	Raise if succesfull close.
void	threadedReadEvent (uchar *readed, int size)
	Raise if read thread succesfull read some data.
void	threadedWriteEvent (ullong id, int written_size)
	Raise if write thread succesfull write some data of task with ID "id".
Public Member Functions inherited from PIThread
	PIThread (void *data, ThreadFunc func, bool startNow=false, int loop_delay=-1)
	Contructs thread with custom data "data", external function "func" and main loop delay "loop_delay".
	PIThread (bool startNow=false, int loop_delay=-1)
	Contructs thread with main loop delay "loop_delay".
void	setData (void *d)
	Set common data passed to external function.
void	setSlot (ThreadFunc func)
	Set external function that will be executed after every run()
void	setPriority (PIThread::Priority prior)
	Set priority of thread.
void *	data () const
	Returns common data passed to external function.
PIThread::Priority	priority () const
	Return priority of thread.
bool	isRunning () const
	Return true if thread is running.
void	needLockRun (bool need)
	Set necessity of lock every run with internal mutex.
PIMutex &	mutex ()
	Return internal mutex.
bool	start (int timer_delay)
	Start thread. More...
bool	start (ThreadFunc func, int timer_delay)
	Start thread. More...
bool	startOnce ()
	Start thread without internal loop. More...
bool	startOnce (ThreadFunc func)
	Start thread without internal loop. More...
void	stop (bool wait)
	Stop thread. More...
void	terminate ()
	Strongly stop thread. More...
bool	waitForStart (int timeout_msecs)
	Wait for thread start. More...
bool	waitForFinish (int timeout_msecs)
	Wait for thread finish. More...
void	lock ()
	Lock internal mutex.
void	unlock ()
	Unlock internal mutex.
void	started ()
	Raise on thread start.
void	stopped ()
	Raise on thread stop.
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 *	superClassName () const
	Returns object superclass name.
bool	debug () const
	Return if debug of this object is active.
void	setName (const PIString &name)
	Set object name.
void	setDebug (bool debug)
	Set object debug active.
const PIMap< PIString, PIVariant > &	properties () const
	Returns properties of the object.
int	propertiesCount () const
	Returns properties count of the object.
PIVariant	property (const PIString &name) const
	Returns property with name "name".
void	setProperty (const PIString &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 PIString &name) const
	Returns if property with name "name" exists.

Static Public Member Functions
static BinLogInfo	getLogInfo (const PIString &path)
	TODO: Think about index positions. More...
Static Public Member Functions inherited from PIIODevice
static PIIODevice *	createFromFullPath (const PIString &full_path)
	Try to determine suitable device, create new one, configure it with configureFromFullPath() and returns it. More...
Static Public Member Functions inherited from PIObject
static void	piDisconnect (PIObject *src, const PIString &sig)
	Disconnect object "src" from all connections with event name "sig".
static void	piDisconnect (PIObject *src)
	Disconnect object "src" from all connections, i.e. all connections where object "src" is emitter.
static PIObject *	findByName (const PIString &name)
	Returns PIObject* with name "name" or 0, if there is no object found.

Public Attributes
PIVector< int >	filterID
	Array of ID, that BinLog can read from binlog file, when use read function, or in ThreadedRead.
Public Attributes inherited from PIIODevice
bool	reopenEnabled
	setReopenEnabled, default "true"
int	reopenTimeout
	setReopenTimeout in ms, default 1000
int	threadedReadBufferSize
	setThreadedReadBufferSize in bytes, default 4096

Protected Member Functions
PIString	fullPathPrefix () const
	Reimplement to construct full unambiguous string prefix. Creating devices by unambiguous string.
void	configureFromFullPath (const PIString &full_path)
	Reimplement to configure your device with parameters of full unambiguous string. Default implementation does nothing.
bool	openDevice ()
	Reimplement to open device, return value will be set to "opened_" variable.
bool	closeDevice ()
	Reimplement to close device, inverse return value will be set to "opened_" variable.
void	propertyChanged (const PIString &)
	Virtual function executes after property with name "name" has been changed.
bool	threadedRead (uchar *readed, int size)
	Function executed when thread read some data, default implementation execute external slot "ret_func_".
Protected Member Functions inherited from PIIODevice
virtual bool	init ()
	Function executed before first openDevice() or from constructor.
virtual bool	configureDevice (const void *e_main, const void *e_parent=0)
	Reimplement to configure device from entries "e_main" and "e_parent", cast arguments to PIConfig::Entry*.
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.
void	deleted ()
	Raise before object delete. More...

Handlers
TODO: Think about index positions
PIString	createNewFile ()
	Create new binlog file in logDir, if successful returns filename, else returns empty string. Filename is like filePrefix + "yyyy_MM_dd__hh_mm_ss.binlog".

Events
void	fileEnd ()
	Raise on file end while reading.
void	fileError ()
	Raise on file creation error.
void	newFile (const PIString &filename)
	Raise on new file created.

Additional Inherited Members
Related Functions inherited from PIIODevice
template<typename T >
T	readDeviceSetting (const PIString &name, const T &def, const PIConfig::Entry *em, const PIConfig::Entry *ep)
	Service function. useful for configuring devices. More...
#define	REGISTER_DEVICE(class)
	Use this macro to enable automatic creation instances of your class with createFromFullPath() function.
#define	PIIODEVICE(class)
	Use this macro instead of PIOBJECT when describe your own PIIODevice.
Related Functions inherited from PIObject
#define	piCoutObj
	Macro used for conditional (piDebug and PIObject::debug()) output to PICout 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
#define	EVENT_HANDLER0(ret, name)   ret name()
	declare event handler "event" with name "name" and return type "ret", ret name()
#define	EVENT_HANDLER1(ret, name, type0, var0)   ret name(type0 var0)
	declare event handler "event" 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 "event" 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 "event" 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 "event" with name "name" and return type "ret", ret name(type0 var0, type1 var1, type2 var2, type3 var3)
#define	EVENT_HANDLER   EVENT_HANDLER0
	EVENT_HANDLER is synonym of EVENT_HANDLER0.
#define	EVENT_VHANDLER0(ret, name)   virtual ret name()
	declare virtual event handler "event" 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 "event" 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 "event" 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 "event" 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 "event" with name "name" and return type "ret", virtual ret name(type0 var0, type1 var1, type2 var2, type3 var3)
#define	EVENT_VHANDLER   EVENT_VHANDLER0
	EVENT_VHANDLER is synonym of EVENT_VHANDLER0.
#define	EVENT0(name)   void name();
	declare event "event" with name "name", void name();
#define	EVENT1(name, type0, var0)   void name(type0 var0);
	declare event "event" with name "name", void name(type0 var0);
#define	EVENT2(name, type0, var0, type1, var1)   void name(type0 var0, type1 var1);
	declare event "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 "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 "event" with name "name", void name(type0 var0, type1 var1, type2 var2, type3 var3);
#define	EVENT   EVENT0
	EVENT is synonym of EVENT0.
#define	CONNECTU(src, event, dest, handler)
	connect event "event" from object "src" to event handler "handler". "Event" and "handler" must has equal argument lists.
#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
#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
#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
#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
#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
#define	CONNECT   CONNECT0
	CONNECT is synonym of CONNECT0.
#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
#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
#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
#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
#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
#define	WEAK_CONNECT   WEAK_CONNECT0
	WEAK_CONNECT is synonym of WEAK_CONNECT0.
#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
	DISCONNECT is synonym of DISCONNECT0.
#define	HANDLER(handler)
	Returns pointer to events handler "handler".

Detailed Description

Class for read and write binary data to logfile, and playback this data in realtime, or custom speed.

TODO: Create static functions to split and join binlog files TODO: Create functions to insert and delete records

Synopsis

Binary Log is a file with simple header, where you can read and write some binary data. Any written data include special header with ID, size and timestamp. This header provides separation different messages from the one file by choosing different IDs. With filterID or special functions, like readBinLog() you can choose IDs what you want to read. With function writeBinLog() or setDefaultID() you can choose ID that mark you data. By default ID = 1, and filterID is empty, that mean you read any ID without filtering. ThreadedRead provide you playback data, with delay that you write data. You can choose different playbak modes by set PlayMode.

Basic usage

This class provide all functions of PIIODevice, such open(), close(), read() ,write(), and threaded read/write. function setLogDir() need to set directory for BinLog files function createNewFile() need to create new binlog file function restart() need start from the begining of binlog file

Member Enumeration Documentation

enum PIBinaryLog::PlayMode

Play modes for PIBinaryLog.

Enumerator
PlayRealTime	Play in system realtime, default mode
PlayVariableSpeed	Play in software realtime with speed, set by setSpeed
PlayStaticDelay	Play with custom static delay, ignoring timestamp

enum PIBinaryLog::SplitMode

Different split modes for writing PIBinaryLog, which can separate files by size, by time or by records count.

Enumerator
SplitNone	Without separate, default mode
SplitTime	Separate files by record time
SplitSize	Separate files by size
SplitCount	Separate files by records count

Member Function Documentation

void PIBinaryLog::setPlaySpeed ( double  speed )

inline

Set play speed to "speed", default value is 1.0x Also this function set playMode to PlayVariableSpeed

void PIBinaryLog::setPlayDelay ( const PISystemTime &  delay )

inline

Setting static delay between records, default value is 1 sec Also this function set playMode to PlayStaticDelay

void PIBinaryLog::setSplitTime ( const PISystemTime &  time )

inline

Set binlog file split time Also this function set splitMode to SplitTime

void PIBinaryLog::setSplitFileSize ( llong  size )

inline

Set binlog file split size Also this function set splitMode to SplitSize

void PIBinaryLog::setSplitRecordCount ( int  count )

inline

Set binlog file split records count Also this function set splitMode to SplitCount

int PIBinaryLog::read ( void *  read_to, int  max_size  )

virtual

Set position in file to reading/playing.

Read one message from binlog file, with ID contains in "filterID" or any ID, if "filterID" is empty

Reimplemented from PIIODevice.

bool PIBinaryLog::createIndex

(

)

TODO: Think about index positions.

Create index of current binlog file

PIBinaryLog::BinLogInfo PIBinaryLog::getLogInfo ( const PIString &  path )

static

TODO: Think about index positions.

Get binlog info and statistic