| Interface | Description | 
|---|---|
| ICandidateEntry | |
| ISpaceComponentsHandler | 
 Interface for classes that handle space components 
 | 
| ISpaceModeListener | 
 Defines a callback listener to be notified when a space mode is changed. 
 | 
| LeaderSelector | 
| Class | Description | 
|---|---|
| LeaderSelectorHandler | 
 Provides runtime primary/backup selection in cluster topologies. 
 | 
| LeaderSelectorHandlerConfig | |
| LusBasedSelectorHandler | 
 Provides runtime primary/backup selection in cluster topologies. 
 | 
| PrimarySpaceModeListeners | 
 Listeners for space stand by events. 
 | 
| PriorityElectionFilter | 
 This election decision filter provides the condition to aquire desired space state on
 NamingService. 
 | 
| SpaceComponentManager | 
 SpaceComponentManager handles SpaceInternal components. 
The manager handles all space mode transitions and changes the components state according to the space state.  | 
| SpaceInitializationIndicator | 
 Used to specify that thread is the space initializer. 
 | 
| Enum | Description | 
|---|---|
| SpaceMode | 
 This enum provides the current space mode. 
 | 
| Exception | Description | 
|---|---|
| ElectionInProcessException | 
 This exception thrown on attempt to access space with non clustered proxy while space
 undergoing election process. 
 | 
| InactiveSpaceException | 
 This exception thrown when attempting to access an inactive space which runs as a backup of
 primary space. 
 | 
| SpaceComponentsInitializeException | 
 SpaceComponentsInitializeException thrown when one of the space components fails to initialize. 
 | 
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