Package org.apache.cassandra.locator

Class ReconnectableSnitchHelper

java.lang.Object

org.apache.cassandra.locator.ReconnectableSnitchHelper

All Implemented Interfaces:

IEndpointStateChangeSubscriber

public class ReconnectableSnitchHelper
extends java.lang.Object
implements IEndpointStateChangeSubscriber

Sidekick helper for snitches that want to reconnect from one IP addr for a node to another. Typically, this is for situations like EC2 where a node will have a public address and a private address, where we connect on the public, discover the private, and reconnect on the private.

Constructor Summary

Constructors

Constructor	Description
ReconnectableSnitchHelper(IEndpointSnitch snitch, java.lang.String localDc, boolean preferLocal)

Method Summary

Modifier and Type	Method	Description
void	beforeChange(InetAddressAndPort endpoint, EndpointState currentState, ApplicationState newStateKey, VersionedValue newValue)
void	onAlive(InetAddressAndPort endpoint, EndpointState state)
void	onChange(InetAddressAndPort endpoint, ApplicationState state, VersionedValue value)
void	onDead(InetAddressAndPort endpoint, EndpointState state)
void	onJoin(InetAddressAndPort endpoint, EndpointState epState)	Use to inform interested parties about the change in the state for specified endpoint
void	onRemove(InetAddressAndPort endpoint)
void	onRestart(InetAddressAndPort endpoint, EndpointState state)	Called whenever a node is restarted.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReconnectableSnitchHelper

public ReconnectableSnitchHelper(IEndpointSnitch snitch,
                                 java.lang.String localDc,
                                 boolean preferLocal)

Method Detail

beforeChange

public void beforeChange(InetAddressAndPort endpoint,
                         EndpointState currentState,
                         ApplicationState newStateKey,
                         VersionedValue newValue)

Specified by:

beforeChange in interface IEndpointStateChangeSubscriber

onJoin

public void onJoin(InetAddressAndPort endpoint,
                   EndpointState epState)

Description copied from interface: IEndpointStateChangeSubscriber

Use to inform interested parties about the change in the state for specified endpoint

Specified by:

onJoin in interface IEndpointStateChangeSubscriber

Parameters:

endpoint - endpoint for which the state change occurred.

epState - state that actually changed for the above endpoint.

onChange

public void onChange(InetAddressAndPort endpoint,
                     ApplicationState state,
                     VersionedValue value)

Specified by:

onChange in interface IEndpointStateChangeSubscriber

onAlive

public void onAlive(InetAddressAndPort endpoint,
                    EndpointState state)

Specified by:

onAlive in interface IEndpointStateChangeSubscriber

onDead

public void onDead(InetAddressAndPort endpoint,
                   EndpointState state)

Specified by:

onDead in interface IEndpointStateChangeSubscriber

onRemove

public void onRemove(InetAddressAndPort endpoint)

Specified by:

onRemove in interface IEndpointStateChangeSubscriber

onRestart

public void onRestart(InetAddressAndPort endpoint,
                      EndpointState state)

Description copied from interface: IEndpointStateChangeSubscriber

Called whenever a node is restarted. Note that there is no guarantee when that happens that the node was previously marked down. It will have only if state.isAlive() == false as state is from before the restarted node is marked up.

Specified by:

onRestart in interface IEndpointStateChangeSubscriber