com.datastax.oss.driver.api.core.metadata

Class NodeStateListenerBase

java.lang.Object

com.datastax.oss.driver.api.core.metadata.NodeStateListenerBase

All Implemented Interfaces:

NodeStateListener, AutoCloseable

public class NodeStateListenerBase
extends Object
implements NodeStateListener

Convenience class for listener implementations that that don't need to override all methods (all methods in this class are empty).

Constructor Summary

Constructors

Constructor and Description
NodeStateListenerBase()

Method Summary

Modifier and Type	Method and Description
void	close()
void	onAdd(Node node) Invoked when a node is first added to the cluster.
void	onDown(Node node) Invoked when a node's state switches to NodeState.DOWN or NodeState.FORCED_DOWN.
void	onRemove(Node node) Invoked when a node leaves the cluster.
void	onUp(Node node) Invoked when a node's state switches to NodeState.UP.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.datastax.oss.driver.api.core.metadata.NodeStateListener

onSessionReady

Constructor Detail

NodeStateListenerBase

public NodeStateListenerBase()

Method Detail

onAdd

public void onAdd(@NonNull
                  Node node)

Description copied from interface: NodeStateListener

Invoked when a node is first added to the cluster.

The node is not up yet at this point. NodeStateListener.onUp(Node) will be notified later if the driver successfully connects to the node (provided that a session is opened and the node is not ignored), or receives a topology event for it.

This method is not invoked for the contact points provided at initialization. It is however for new nodes discovered during the full node list refresh after the first connection.

Specified by:

onAdd in interface NodeStateListener

onUp

public void onUp(@NonNull
                 Node node)

Description copied from interface: NodeStateListener

Invoked when a node's state switches to NodeState.UP.

Specified by:

onUp in interface NodeStateListener

onDown

public void onDown(@NonNull
                   Node node)

Description copied from interface: NodeStateListener

Invoked when a node's state switches to NodeState.DOWN or NodeState.FORCED_DOWN.

Specified by:

onDown in interface NodeStateListener

onRemove

public void onRemove(@NonNull
                     Node node)

Description copied from interface: NodeStateListener

Invoked when a node leaves the cluster.

This can be triggered by a topology event, or during a full node list refresh if the node is absent from the new list.

Specified by:

onRemove in interface NodeStateListener

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception