This class is a used to store TANGO device server process data and to provide the user with a set of utilities method. More...

#include "tango.h"

Public Member Functions
Destructor
Only one destructor is defined for this class
	~Util ()
	The class destructor.

Get/Set instance data
CORBA::ORB_ptr	get_orb ()
	Get a reference to the CORBA ORB. More...

PortableServer::POA_ptr	get_poa ()
	Get a reference to the CORBA Portable Object Adapter (POA) More...

void	set_trace_level (int level)
	Set the process trace level. More...

int	get_trace_level ()
	Get the process trace level. More...

string &	get_ds_inst_name ()
	Get the device server instance name. More...

string &	get_ds_exec_name ()
	Get the device server executable name. More...

string &	get_ds_name ()
	Get the device server name. More...

string &	get_host_name ()
	Get the host name where the device server process is running. More...

string &	get_pid_str ()
	Get the device server process identifier as a String. More...

TangoSys_Pid	get_pid ()
	Get the device server process identifier. More...

long	get_tango_lib_release ()
	Get the TANGO library version number. More...

string &	get_version_str ()
	Get the IDL TANGO version. More...

string &	get_server_version ()
	Get the device server version. More...

void	set_server_version (const char *vers)
	Set the device server version. More...

void	set_class_list (vector< DeviceClass * > *list)
	Set the DeviceClass list pointer. More...

void	add_class_to_list (DeviceClass *cl)
	Add a DeviceClass to the DeviceClass list pointer. More...

const vector< DeviceClass * > *	get_class_list ()
	Get the DeviceClass list pointer. More...

void	set_serial_model (SerialModel ser)
	Set the serialization model. More...

SerialModel	get_serial_model ()
	Get the serialization model. More...

NotifdEventSupplier *	get_notifd_event_supplier ()
	Get a reference to the notifd TANGO EventSupplier object. More...

ZmqEventSupplier *	get_zmq_event_supplier ()
	Get a reference to the ZMQ TANGO EventSupplier object. More...

void	set_ds_event_buffer_hwm (DevLong val)
	Set device server process event buffer high water mark (HWM) More...

Polling related methods
void	trigger_cmd_polling (DeviceImpl *dev, const string &name)
	Trigger polling for polled command. More...

void	trigger_attr_polling (DeviceImpl *dev, const string &name)
	Trigger polling for polled attribute. More...

template<typename T >
void	fill_attr_polling_buffer (DeviceImpl *dev, string &att_name, AttrHistoryStack< T > &data)
	Fill polling buffer for polled attribute. More...

template<typename T >
void	fill_cmd_polling_buffer (DeviceImpl *dev, string &cmd_name, CmdHistoryStack< T > &data)
	Fill polling buffer for polled command. More...

void	set_polling_threads_pool_size (unsigned long thread_nb)
	Set the polling threads pool size. More...

unsigned long	get_polling_threads_pool_size ()
	Get the polling threads pool size. More...

void	set_polling_before_9 (bool val)
	Set the polling thread algorithm to the algorithum used before Tango 9. More...

Miscellaneous methods
bool	is_svr_starting ()
	Check if the device server process is in its starting phase. More...

bool	is_svr_shutting_down ()
	Check if the device server process is in its shutting down sequence. More...

bool	is_device_restarting (string &d_name)
	Check if the device is actually restarted by the device server process admin device with its DevRestart command. More...

Database related methods
void	connect_db ()
	Connect the process to the TANGO database. More...

void	reset_filedatabase ()
	Reread the file database.

Database *	get_database ()
	Get a reference to the TANGO database object. More...

void	unregister_server ()
	Unregister a device server process from the TANGO database. More...

Device reference related methods
vector< DeviceImpl * > &	get_device_list_by_class (const string &class_name)
	Get the list of device references for a given TANGO class. More...

vector< DeviceImpl * > &	get_device_list_by_class (const char *class_name)
	Get the list of device references for a given TANGO class. More...

DeviceImpl *	get_device_by_name (const string &dev_name)
	Get a device reference from its name. More...

DeviceImpl *	get_device_by_name (const char *dev_name)
	Get a device reference from its name. More...

DServer *	get_dserver_device ()
	Get a reference to the dserver device attached to the device server process. More...

vector< DeviceImpl * >	get_device_list (const string &name)
	Get DeviceList from name. More...

Device pattern related methods
void	server_init (bool with_window=false)
	Initialise all the device server pattern(s) embedded in a device server process. More...

void	server_run ()
	Run the CORBA event loop. More...

void	server_cleanup ()
	Cleanup a Tango device server process before exit. More...

void	server_set_event_loop (bool(*f_ptr)())
	Set the server event loop. More...

Static Public Member Functions
Singleton related methods
These methods follow the singleton design pattern (only one instance of a class)
static Util *	init (int argc, char *argv[])
	Create and get the singleton object reference. More...

static TANGO_IMP_EXP Util *	instance (bool exit=true)
	Get the singleton object reference. More...

Static Public Attributes
Class data members
static int	_tracelevel
	The process trace level.

static TANGO_IMP bool	_UseDb
	The database use flag (Use with extreme care). More...

static TANGO_IMP bool	_daemon
	A daemon process flag. More...

static TANGO_IMP long	_sleep_between_connect
	The loop sleeping time in case of the _daemon flag set to true. More...

Protected Member Functions
	Util (int argc, char *argv[])
	Constructs a newly allocated Util object. More...

Detailed Description

This class is a used to store TANGO device server process data and to provide the user with a set of utilities method.

This class is implemented using the singleton design pattern. Therefore a device server process can have only one instance of this class and its constructor is not public.

Author: taurel

Revision: 28853

Constructor & Destructor Documentation

Tango::Util::Util	(	int	argc,
		char *	argv[]
	)

protected

Constructs a newly allocated Util object.

This constructor is protected following the singleton pattern

Parameters

argc	The process command line argument number
argv	The process commandline arguments

Member Function Documentation

void Tango::Util::add_class_to_list ( DeviceClass * cl )

inline

Add a DeviceClass to the DeviceClass list pointer.

Parameters

cl	The DeviceClass ptr

void Tango::Util::connect_db ( )

Connect the process to the TANGO database.

If the connection to the database failed, a message is displayed on the screen and the process is aborted

template<typename T >

void Tango::Util::fill_attr_polling_buffer	(	DeviceImpl *	dev,
		string &	att_name,
		AttrHistoryStack< T > &	data
	)

Fill polling buffer for polled attribute.

This method fills the polling buffer for one polled attribute registered with an update period defined as "externally triggerred" (polling period set to 0)

Parameters

dev	The TANGO device
att_name	The attribute name which must be polled
data	The data stack with one element for each history element

Exceptions

DevFailed If the call failed Click here to read DevFailed exception specification

template<typename T >

void Tango::Util::fill_cmd_polling_buffer	(	DeviceImpl *	dev,
		string &	cmd_name,
		CmdHistoryStack< T > &	data
	)

Fill polling buffer for polled command.

This method fills the polling buffer for one polled command registered with an update period defined as "externally triggerred" (polling period set to 0)

Parameters

dev	The TANGO device
cmd_name	The command name which must be polled
data	The data stack with one element for each history element

Exceptions

DevFailed If the call failed Click here to read DevFailed exception specification

const vector<DeviceClass *>* Tango::Util::get_class_list ( )

inline

Get the DeviceClass list pointer.

Returns: The DeviceClass ptr vector address

Database* Tango::Util::get_database ( )

inline

Get a reference to the TANGO database object.

Returns: The database object

DeviceImpl* Tango::Util::get_device_by_name ( const string & dev_name )

Get a device reference from its name.

Parameters

dev_name The TANGO device name

Returns: The device reference

Exceptions

DevFailed If in the device is not served by one device pattern implemented in this process. Click here to read DevFailed exception specification

DeviceImpl* Tango::Util::get_device_by_name ( const char * dev_name )

Get a device reference from its name.

Parameters

dev_name The TANGO device name

Returns: The device reference

Exceptions

DevFailed If in the device is not served by one device pattern implemented in this process. Click here to read DevFailed exception specification

vector<DeviceImpl *> Tango::Util::get_device_list ( const string & name )

Get DeviceList from name.

It is possible to use a wild card ('*') in the name parameter (e.g. "*", "/tango/tangotest/n*", ...)

Parameters

name	The device name

Returns: The DeviceClass ptr vector address

vector<DeviceImpl *>& Tango::Util::get_device_list_by_class ( const string & class_name )

Get the list of device references for a given TANGO class.

Return the list of references for all devices served by one implementation of the TANGO device pattern implemented in the process

Parameters

class_name The TANGO device class name

Returns: The device reference list

Exceptions

DevFailed If in the device server process there is no TANGO device pattern implemented the TANGO device class given as parameter Click here to read DevFailed exception specification

vector<DeviceImpl *>& Tango::Util::get_device_list_by_class ( const char * class_name )

Get the list of device references for a given TANGO class.

Return the list of references for all devices served by one implementation of the TANGO device pattern implemented in the process

Parameters

class_name The TANGO device class name

Returns: The device reference list

Exceptions

DevFailed If in the device server process there is no TANGO device pattern implemented the TANGO device class given as parameter Click here to read DevFailed exception specification

string& Tango::Util::get_ds_exec_name ( )

inline

Get the device server executable name.

Returns: The device server executable name

string& Tango::Util::get_ds_inst_name ( )

inline

Get the device server instance name.

Returns: The device server instance name

string& Tango::Util::get_ds_name ( )

inline

Get the device server name.

The device server name is the device server executable name/the device server instance name

Returns: The device server name

DServer* Tango::Util::get_dserver_device ( )

Get a reference to the dserver device attached to the device server process.

Returns: A reference to the dserver device

string& Tango::Util::get_host_name ( )

inline

Get the host name where the device server process is running.

Returns: The host name

NotifdEventSupplier* Tango::Util::get_notifd_event_supplier ( )

inline

Get a reference to the notifd TANGO EventSupplier object.

Returns: The notifd EventSupplier object

CORBA::ORB_ptr Tango::Util::get_orb ( )

inline

Get a reference to the CORBA ORB.

This is a CORBA _duplicate of the original reference

Returns: The CORBA ORB

TangoSys_Pid Tango::Util::get_pid ( )

inline

Get the device server process identifier.

Returns: The device server process identifier

string& Tango::Util::get_pid_str ( )

inline

Get the device server process identifier as a String.

Returns: The device server process identifier as a string

PortableServer::POA_ptr Tango::Util::get_poa ( )

inline

Get a reference to the CORBA Portable Object Adapter (POA)

This is a CORBA _dupilcate of the original reference to the object POA. For classical device server, thisis the root POA. For no database device server, this is a specific POA with the USER_ID policy.

Returns: The CORBA root POA

unsigned long Tango::Util::get_polling_threads_pool_size ( )

inline

Get the polling threads pool size.

Returns: The maximun number of threads in the polling threads pool

SerialModel Tango::Util::get_serial_model ( )

inline

Get the serialization model.

Returns: The serialization model. This serialization model is one of BY_DEVICE, BY_CLASS, BY_PROCESS or NO_SYNC

string& Tango::Util::get_server_version ( )

inline

Get the device server version.

Returns: The device server version

long Tango::Util::get_tango_lib_release ( )

Get the TANGO library version number.

Returns: The Tango library release number coded in 3 digits (for instance 550,551,552,600,....)

int Tango::Util::get_trace_level ( )

inline

Get the process trace level.

Returns: The process trace level

References _tracelevel.

string& Tango::Util::get_version_str ( )

inline

Get the IDL TANGO version.

Returns: The device server version

ZmqEventSupplier* Tango::Util::get_zmq_event_supplier ( )

inline

Get a reference to the ZMQ TANGO EventSupplier object.

Returns: The zmq EventSupplier object

static Util* Tango::Util::init	(	int	argc,
		char *	argv[]
	)

static

Create and get the singleton object reference.

This method returns a reference to the object of the Util class. If the class singleton object has not been created, it will be instanciated

Parameters

argc	The process command line argument number
argv	The process commandline arguments

Returns: The Util object reference

static TANGO_IMP_EXP Util* Tango::Util::instance ( bool exit = true )

static

Get the singleton object reference.

This method returns a reference to the object of the Util class. If the class has not been initialised with it's init method, this method print a message and abort the device server process

Returns: The Util object reference

bool Tango::Util::is_device_restarting ( string & d_name )

inline

Check if the device is actually restarted by the device server process admin device with its DevRestart command.

Returns: A boolean set to true if the device is restarting.

bool Tango::Util::is_svr_shutting_down ( )

inline

Check if the device server process is in its shutting down sequence.

Returns: A boolean set to true if the server is in its shutting down phase.

bool Tango::Util::is_svr_starting ( )

inline

Check if the device server process is in its starting phase.

Returns: A boolean set to true if the server is in its starting phase.

void Tango::Util::server_cleanup ( )

Cleanup a Tango device server process before exit.

This method cleanup a Tango device server and relinquish all computer resources before the process exit

void Tango::Util::server_init ( bool with_window = false )

Initialise all the device server pattern(s) embedded in a device server process.

Exceptions

DevFailed If the device pattern initialisation failed Click here to read DevFailed exception specification

void Tango::Util::server_run ( )

Run the CORBA event loop.

This method runs the CORBA event loop. For UNIX or Linux operating system, this method does not return. For Windows in a non-console mode, this method start a thread which enter the CORBA event loop.

void Tango::Util::server_set_event_loop ( bool(*)() f_ptr )

inline

Set the server event loop.

This method registers an event loop function in a Tango server. This function will be called by the process main thread in an infinite loop The process will not use the classical ORB blocking event loop. It is the user responsability to code this function in a way that it implements some kind of blocking in order not to load the computer CPU

Parameters

f_ptr The event loop function pointer. This function will not receive any argument. It returns a boolean value. If this boolean is set to true, the device server process exit.

void Tango::Util::set_class_list ( vector< DeviceClass * > * list )

inline

Set the DeviceClass list pointer.

Parameters

list	The DeviceClass ptr vector address

void Tango::Util::set_ds_event_buffer_hwm ( DevLong val )

inline

Set device server process event buffer high water mark (HWM)

Parameters

val	The new event buffer high water mark in number of events

void Tango::Util::set_polling_before_9 ( bool val )

inline

Set the polling thread algorithm to the algorithum used before Tango 9.

Parameters

val	Polling algorithm flag

void Tango::Util::set_polling_threads_pool_size ( unsigned long thread_nb )

inline

Set the polling threads pool size.

Parameters

thread_nb The maximun number of threads in the polling threads pool

void Tango::Util::set_serial_model ( SerialModel ser )

inline

Set the serialization model.

Parameters

ser	The new serialization model. The serialization model must be one of BY_DEVICE, BY_CLASS, BY_PROCESS or NO_SYNC

void Tango::Util::set_server_version ( const char * vers )

inline

Set the device server version.

Parameters

vers	The device server version

void Tango::Util::set_trace_level ( int level )

inline

Set the process trace level.

Parameters

level The new process level

References _tracelevel.

void Tango::Util::trigger_attr_polling	(	DeviceImpl *	dev,
		const string &	name
	)

Trigger polling for polled attribute.

This method send the order to the polling thread to poll one object registered with an update period defined as "externally triggerred"

Parameters

dev	The TANGO device
name	The attribute name which must be polled

Exceptions

DevFailed If the call failed Click here to read DevFailed exception specification

void Tango::Util::trigger_cmd_polling	(	DeviceImpl *	dev,
		const string &	name
	)

Trigger polling for polled command.

This method send the order to the polling thread to poll one object registered with an update period defined as "externally triggerred"

Parameters

dev	The TANGO device
name	The command name which must be polled

Exceptions

DevFailed If the call failed Click here to read DevFailed exception specification

void Tango::Util::unregister_server ( )

Unregister a device server process from the TANGO database.

If the database call fails, a message is displayed on the screen and the process is aborted

Member Data Documentation

TANGO_IMP bool Tango::Util::_daemon

static

A daemon process flag.

If this flag is set to true, the server process will not exit if it not able to connect to the database. Instead, it will loop until the connection suceeds. The default value is false.

TANGO_IMP long Tango::Util::_sleep_between_connect

static

The loop sleeping time in case of the _daemon flag set to true.

This sleeping time is the number of seconds the process will sleep before it tries again to connect to the database. The default value is 60 seconds.

TANGO_IMP bool Tango::Util::_UseDb

static

The database use flag (Use with extreme care).

Implemented for device server started without database usage.

Referenced by Tango::DeviceImpl::get_db_device().

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

utils.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation