org.apache.cassandra.locator
Class Ec2MultiRegionSnitch

java.lang.Object
  org.apache.cassandra.locator.AbstractEndpointSnitch
      org.apache.cassandra.locator.AbstractNetworkTopologySnitch
          org.apache.cassandra.locator.Ec2Snitch
              org.apache.cassandra.locator.Ec2MultiRegionSnitch

All Implemented Interfaces:

IEndpointStateChangeSubscriber, IEndpointSnitch

public class Ec2MultiRegionSnitch
extends Ec2Snitch
implements IEndpointStateChangeSubscriber

1) Snitch will automatically set the public IP by querying the AWS API 2) Snitch will set the private IP as a Gossip application state. 3) Snitch implements IESCS and will reset the connection if it is within the same region to communicate via private IP. Implements Ec2Snitch to inherit its functionality and extend it for Multi-Region. Operational: All the nodes in this cluster needs to be able to (modify the Security group settings in AWS) communicate via Public IP's.

Field Summary

Fields inherited from class org.apache.cassandra.locator.Ec2Snitch

ec2region, ec2zone, logger, ZONE_NAME_QUERY_URL

Constructor Summary

Ec2MultiRegionSnitch()

Method Summary

void	gossiperStarting() called after Gossiper instance exists immediately before it starts gossiping
void	onAlive(java.net.InetAddress endpoint, EndpointState state)
void	onChange(java.net.InetAddress endpoint, ApplicationState state, VersionedValue value)
void	onDead(java.net.InetAddress endpoint, EndpointState state)
void	onJoin(java.net.InetAddress endpoint, EndpointState epState) Use to inform interested parties about the change in the state for specified endpoint
void	onRemove(java.net.InetAddress endpoint)
void	onRestart(java.net.InetAddress endpoint, EndpointState state) Called whenever a node is restarted.

Methods inherited from class org.apache.cassandra.locator.Ec2Snitch

getDatacenter, getRack

Methods inherited from class org.apache.cassandra.locator.AbstractNetworkTopologySnitch

compareEndpoints

Methods inherited from class org.apache.cassandra.locator.AbstractEndpointSnitch

getSortedListByProximity, isWorthMergingForRangeQuery, sortByProximity

Methods inherited from class java.lang.Object

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

Constructor Detail

Ec2MultiRegionSnitch

public Ec2MultiRegionSnitch()
                     throws java.io.IOException,
                            ConfigurationException

Throws:

java.io.IOException

ConfigurationException

Method Detail

onJoin

public void onJoin(java.net.InetAddress 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(java.net.InetAddress endpoint,
                     ApplicationState state,
                     VersionedValue value)

Specified by:

onChange in interface IEndpointStateChangeSubscriber

onAlive

public void onAlive(java.net.InetAddress endpoint,
                    EndpointState state)

Specified by:

onAlive in interface IEndpointStateChangeSubscriber

onDead

public void onDead(java.net.InetAddress endpoint,
                   EndpointState state)

Specified by:

onDead in interface IEndpointStateChangeSubscriber

onRestart

public void onRestart(java.net.InetAddress 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

onRemove

public void onRemove(java.net.InetAddress endpoint)

Specified by:

onRemove in interface IEndpointStateChangeSubscriber

gossiperStarting

public void gossiperStarting()

Description copied from interface: IEndpointSnitch

called after Gossiper instance exists immediately before it starts gossiping

Specified by:

gossiperStarting in interface IEndpointSnitch

Overrides:

gossiperStarting in class AbstractEndpointSnitch