rtctk::componentFramework::RepositorySubscriberIf::SubscribeRequest Class Reference

A request object to pass information about datapoints to subscribe to. More...

#include <repositorySubscriberIf.hpp>

Classes
class	Parameters
	A structure to hold the arguments passed to the Add method. More...

Public Member Functions
template<typename F >
void	AddRemovedHandler (const DataPointPath &path, F handler)
	Adds a request to subscribe to removal notifications for a particular datapoint. More...
template<typename T , typename F >
void	AddNewValueHandler (const DataPointPath &path, T &buffer, F handler)
	Adds a request to subscribe to new data values for a particular datapoint. More...
const std::vector< Parameters > &	GetParams () const

Detailed Description

A request object to pass information about datapoints to subscribe to.

Thread Safety

thread-compatible

Member Function Documentation

AddNewValueHandler()

template<typename T , typename F >

void rtctk::componentFramework::RepositorySubscriberIf::SubscribeRequest::AddNewValueHandler	(	const DataPointPath &	path,
		T &	buffer,
		F	handler
	)

Adds a request to subscribe to new data values for a particular datapoint.

This will associate a particular callback function to receive new datapoint values. Once the request has been sent with the SendSubscribeRequest method, notifications for new data values for the given datapoint will be received as soon as the registration completes. This may occur before the Response::Wait returns, i.e. the response object returned by SendSubscribeRequest. Whenever a new data value notification is received the callback handler function is invoked. It takes two arguments, the path of the datapoint that was updated and a reference to the registered buffer that contains the updated value.

Note

The buffer that is given to this method must only be accessed inside the callback function since it is executed on a different thread than the caller. Alternatively, one can use standard synchronisation mechanisms, e.g. a mutex, to avoid race conditions.

Parameters

[in]	path	The path of the datapoint to subscribe to.
[in]	buffer	The buffer that will be filled with new data values.
[in]	handler	A handler function, lambda or functional to invoke. It must have a signature compatible with void(const DataPointPath& path, T& buffer) .

Thread Safety

❗thread-hostile❗ – Intended to be used in one thread only.

Exception Safety

basic

AddRemovedHandler()

template<typename F >

void rtctk::componentFramework::RepositorySubscriberIf::SubscribeRequest::AddRemovedHandler	(	const DataPointPath &	path,
		F	handler
	)

Adds a request to subscribe to removal notifications for a particular datapoint.

This will associate a particular notification callback function with a datapoint. Once the request has been sent with the SendSubscribeRequest method, notifications for removed datapoints will be received as soon as registration completes and the datapoint has actually been removed. This may occur before the Responce::Wait returns, i.e. the response object returned by SendSubscribeRequest. Whenever a notification is received the given handler callback function is invoked. Its argument will contain the path of the datapoint that was removed.

Parameters

[in]	path	The path of the datapoint to subscribe to.
[in]	handler	A handler function, lambda or functional to invoke. It must have a signature compatible with void(const DataPointPath& path) .

Thread Safety

❗thread-hostile❗ – Intended to be used in one thread only.

Exception Safety

basic

GetParams()

const std::vector<Parameters>& rtctk::componentFramework::RepositorySubscriberIf::SubscribeRequest::GetParams ( ) const

inline

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

• componentFramework/services/common/src/include/rtctk/componentFramework/repositorySubscriberIf.hpp