Subscription Class Reference

An OPCUA Subscribe serves to monitor OPCUA variables (from a client) and provides a callback mechanism for changes. More...

#include <cvb/opcua/subscription.hpp>

Inherits enable_shared_from_this< Subscription >.

Public Member Functions
EventCookie	AddMonitoredItem (const VariableNode &node, std::function< void()> callback)
	Adds a monitored item to an existing subscription. More...
void	DeleteMonitoredItem (const EventCookie &cookie)
	Remove a monitored item from an existing subscription. More...

Detailed Description

An OPCUA Subscribe serves to monitor OPCUA variables (from a client) and provides a callback mechanism for changes.

Member Function Documentation

AddMonitoredItem()

EventCookie AddMonitoredItem ( const VariableNode &  node, std::function< void()>  callback  )

inline

Adds a monitored item to an existing subscription.

Parameters

[in]	node	OPCUA Variable that should be monitored.
[in]	callback	Callback function pointer that is called when the value of the OPCUA Monitored Item changes.

Returns

EventCookie for removal of monitored item

Exceptions

Any	exception derived from std::exception including CvbException and OpcUaException.

Note

This function is specialized to monitor the value of OPCUA Variables.

DeleteMonitoredItem()

void DeleteMonitoredItem ( const EventCookie &  cookie )

inline

Remove a monitored item from an existing subscription.

Note

This function is specialized to monitor the value of OPCUA Variables.

Parameters

[in]

cookie

EventCookie of the MonitoredItem

Exceptions

Any	exception derived from std::exception including CvbException and OpcUaException.