Creating and removing topics.

Functions
void	add_topic_from_specification (SESSION_T *session, const char *topic_path, const TOPIC_SPECIFICATION_T *specification, const ADD_TOPIC_CALLBACK_T callback)
	Add a topic to Diffusion. More...
void	topic_removal (SESSION_T *session, const TOPIC_REMOVAL_PARAMS_T params)
	Remove topics from Diffusion. More...
void	session_wills_remove_topics (SESSION_T *session, const SESSION_WILLS_REMOVE_TOPIC_PARAMS_T params)
	Register a topic removal session will. More...
CONVERSATION_ID_T *	missing_topic_register_handler (SESSION_T *session, const MISSING_TOPIC_PARAMS_T params)
	Register to receive notifications about missing topics that clients attempt to fetch/subscribe. More...
void	missing_topic_deregister_handler (SESSION_T *session, const CONVERSATION_ID_T *conversation_id)
	Cease receiving missing topic notifications. More...

Detailed Description

Function Documentation

void add_topic_from_specification	(	SESSION_T *	session,
		const char *	topic_path,
		const TOPIC_SPECIFICATION_T *	specification,
		const ADD_TOPIC_CALLBACK_T	callback
	)

Add a topic to Diffusion.

Parameters

session	The current session. If NULL, this function returns immediately.
topic_path	The topic path to be added.
specification	The topic specification
callback	Struct containing pointers to callback functions will be called when a response to the request is received from the server.

void missing_topic_deregister_handler	(	SESSION_T *	session,
		const CONVERSATION_ID_T *	conversation_id
	)

Cease receiving missing topic notifications.

Parameters

session	The current session. If NULL, this function returns immediately.
conversation_id	The conversation id returned from a previous call to missing_topic_register_handler().

CONVERSATION_ID_T* missing_topic_register_handler	(	SESSION_T *	session,
		const MISSING_TOPIC_PARAMS_T	params
	)

Register to receive notifications about missing topics that clients attempt to fetch/subscribe.

Missing topic notifications from a 'fetch' operation only occur when using the deprecated fetch mechanism. The newer diffusion_fetch_request_fetch mechanism does not support missing topic notifications.

Register a handler for receiving missing topic notifications when a client attempts to fetch or subscribe to a topic underneath a given root topic, but that requested topic doesn't exist.

Parameters

session	The current session. If NULL, this function returns immediately with the value NULL.
params	Parameters defining the registration request.

Returns

A conversation id that can be used to deregister the handler at a later time, or NULL if the supplied session is NULL.

void session_wills_remove_topics	(	SESSION_T *	session,
		const SESSION_WILLS_REMOVE_TOPIC_PARAMS_T	params
	)

Register a topic removal session will.

An application should call this function to register a session will, whereby the specified topics are removed on session disconnection.

Parameters

session	The current session. If NULL, this function returns immediately.
params	Parameters describing the session will registration request and the callback handlers which may be invoked in response.

void topic_removal	(	SESSION_T *	session,
		const TOPIC_REMOVAL_PARAMS_T	params
	)

Remove topics from Diffusion.

Send a request to remove one or more topics at the server. The topics to remove will depend upon the nature of the topic selector specified. If the selector does not have descendant pattern qualifiers (i.e. / or //), only those topics that exist at paths indicated by the selector will be removed and not their descendants. If a single / qualifier is specified, all descendants of the matching topic paths will be removed. If // is specified, all branches of the topic tree that match the selector (i.e topics at the selected paths and all descendants of the selected paths) will be removed.

Parameters

session	The current session. If NULL, this function returns immediately.
params	Parameter structure describing which topics to remove and callbacks to handle success or failure notifications.