io.picodata.jdbc.core.cluster

Interface ClusterTopologyInfoProvider

All Known Implementing Classes:

DefaultClusterTopologyInfoProviderImpl

public interface ClusterTopologyInfoProvider

Fetches cluster topology information from Picodata servers and allows to subscribe for topology updates.

Method Summary

Modifier and Type	Method and Description
void	addListener(ClusterTopologyInfoUpdatesListener listener) Subscribe a listener for cluster topology updates.
void	fetchAndNotify() Check whether we need to fetch topology information.
void	removeListener(ClusterTopologyInfoUpdatesListener listener) Unsubscribe a listener from cluster topology updates.

Method Detail

addListener

void addListener(ClusterTopologyInfoUpdatesListener listener)

Subscribe a listener for cluster topology updates.

Parameters:

listener - cluster topology updates listener

fetchAndNotify

void fetchAndNotify()
             throws SQLException

Check whether we need to fetch topology information. Update topology information if necessary. Notify cluster topology update listeners upon successful update.

Throws:

SQLException - if failed to establish connection or fetch the cluster metadata.

removeListener

void removeListener(ClusterTopologyInfoUpdatesListener listener)

Unsubscribe a listener from cluster topology updates.

Parameters:

listener - cluster topology updates listener