me.prettyprint.cassandra.connection
Interface ConnectionManagerListener

All Superinterfaces:

Serializable

All Known Implementing Classes:

ConnectionManagerEmptyListener

public interface ConnectionManagerListener
extends Serializable

Listener for the status of CassandraHosts in order to use it - simply implement it and apply your own actions on the events Use HConnectionManager.addListener(String, ConnectionManagerListener) You can also extend the empty implementation ConnectionManagerEmptyListener if you only need some of the events

Author:

Elyran Kogan

Method Summary

String	getName()
void	onAddHost(CassandraHost cassandraHost, boolean added, String errorMessage, Exception e) fires when an action to add CassandraHost was triggered
void	onAllHostsDown() fires when the CassandraHostRetryService detects that all nodes are down CassandraHostRetryService must be enabled for this event to fire
void	onHostDown(CassandraHost cassandraHost) fires when a CassandraHost was detected as down
void	onHostRestored(CassandraHost cassandraHost) fires when a CassandraHost was restored by the CassandraHostRetryService CassandraHostRetryService must be enabled for this event to fire
void	onRemoveHost(CassandraHost cassandraHost, boolean removed, String message) fires when an action to remove CassandraHost was triggered
void	onSuspendHost(CassandraHost cassandraHost, boolean removed) fired when a suspend action was triggered on the host
void	onUnSuspendHost(CassandraHost cassandraHost, boolean readded) fired when an un-suspend action was triggered on the host

Method Detail

onHostDown

void onHostDown(CassandraHost cassandraHost)

fires when a CassandraHost was detected as down

Parameters:

cassandraHost - - the host that was detected as down

onHostRestored

void onHostRestored(CassandraHost cassandraHost)

fires when a CassandraHost was restored by the CassandraHostRetryService CassandraHostRetryService must be enabled for this event to fire

Parameters:

cassandraHost - - the restored host

onAllHostsDown

void onAllHostsDown()

fires when the CassandraHostRetryService detects that all nodes are down CassandraHostRetryService must be enabled for this event to fire

onSuspendHost

void onSuspendHost(CassandraHost cassandraHost,
                   boolean removed)

fired when a suspend action was triggered on the host

Parameters:

cassandraHost - - the host to be suspended

removed - - true if was successfully suspended

onUnSuspendHost

void onUnSuspendHost(CassandraHost cassandraHost,
                     boolean readded)

fired when an un-suspend action was triggered on the host

Parameters:

cassandraHost - - the host to be un-suspended

readded - - true if was successfully un-suspended

onAddHost

void onAddHost(CassandraHost cassandraHost,
               boolean added,
               String errorMessage,
               Exception e)

fires when an action to add CassandraHost was triggered

Parameters:

cassandraHost - - the host to add

added - - true if added successfully

errorMessage - - the message in case of an error (can be null otherwise)

e - - exception when trying to add

onRemoveHost

void onRemoveHost(CassandraHost cassandraHost,
                  boolean removed,
                  String message)

fires when an action to remove CassandraHost was triggered

Parameters:

cassandraHost - - the host to remove

removed - - true if successfully removed

message - - the message received with the action

getName

String getName()

Returns:

the name of the listener