Abstract class that provides interface for adding and removing observers on cluster status changes. More...

#include <metadata_cache.h>

Inheritance diagram for metadata_cache::ClusterStateNotifierInterface:

Public Member Functions
virtual void	add_state_listener (ClusterStateListenerInterface *listener)=0
	Register observer that is notified when there is a change in the cluster nodes setup/state discovered. More...

virtual void	remove_state_listener (ClusterStateListenerInterface *listener)=0
	Unregister observer previously registered with add_state_listener() More...

	ClusterStateNotifierInterface ()=default

	ClusterStateNotifierInterface (const ClusterStateNotifierInterface &)=delete

ClusterStateNotifierInterface &	operator= (const ClusterStateNotifierInterface &)=delete

virtual	~ClusterStateNotifierInterface ()

Detailed Description

Abstract class that provides interface for adding and removing observers on cluster status changes.

When state of cluster is changed, then ClusterStateListenerInterface::notify function is called for every registered observer.

Constructor & Destructor Documentation

◆ ClusterStateNotifierInterface() [1/2]

metadata_cache::ClusterStateNotifierInterface::ClusterStateNotifierInterface ( )

default

◆ ClusterStateNotifierInterface() [2/2]

metadata_cache::ClusterStateNotifierInterface::ClusterStateNotifierInterface ( const ClusterStateNotifierInterface & )

explicitdelete

◆ ~ClusterStateNotifierInterface()

metadata_cache::ClusterStateNotifierInterface::~ClusterStateNotifierInterface ( )

virtualdefault

Member Function Documentation

◆ add_state_listener()

virtual void metadata_cache::ClusterStateNotifierInterface::add_state_listener ( ClusterStateListenerInterface * listener )

pure virtual

Register observer that is notified when there is a change in the cluster nodes setup/state discovered.

Parameters

listener Observer object that is notified when cluster nodes state is changed.

Exceptions

std::runtime_error if metadata cache not initialized

Implemented in metadata_cache::MetadataCacheAPI, metadata_cache::MetadataCacheAPIBase, and MetadataCache.

◆ operator=()

ClusterStateNotifierInterface & metadata_cache::ClusterStateNotifierInterface::operator= ( const ClusterStateNotifierInterface & )

delete

◆ remove_state_listener()

virtual void metadata_cache::ClusterStateNotifierInterface::remove_state_listener ( ClusterStateListenerInterface * listener )