org.apache.cassandra.locator

Class SimpleSnitch

java.lang.Object

org.apache.cassandra.locator.AbstractEndpointSnitch

org.apache.cassandra.locator.SimpleSnitch

All Implemented Interfaces:

IEndpointSnitch

public class SimpleSnitch
extends AbstractEndpointSnitch

A simple endpoint snitch implementation that treats Strategy order as proximity, allowing non-read-repaired reads to prefer a single endpoint, which improves cache locality.

Constructor Summary

Constructors

Constructor and Description
SimpleSnitch()

Method Summary

Modifier and Type	Method and Description
int	compareEndpoints(java.net.InetAddress target, java.net.InetAddress a1, java.net.InetAddress a2) compares two endpoints in relation to the target endpoint, returning as Comparator.compare would
java.lang.String	getDatacenter(java.net.InetAddress endpoint) returns a String representing the datacenter this endpoint belongs to
java.lang.String	getRack(java.net.InetAddress endpoint) returns a String repesenting the rack this endpoint belongs to
void	sortByProximity(java.net.InetAddress address, java.util.List<java.net.InetAddress> addresses) Sorts the List of node addresses, in-place, by proximity to the given address

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

getSortedListByProximity, gossiperStarting, isWorthMergingForRangeQuery

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleSnitch

public SimpleSnitch()

Method Detail

getRack

public java.lang.String getRack(java.net.InetAddress endpoint)

Description copied from interface: IEndpointSnitch

returns a String repesenting the rack this endpoint belongs to

getDatacenter

public java.lang.String getDatacenter(java.net.InetAddress endpoint)

Description copied from interface: IEndpointSnitch

returns a String representing the datacenter this endpoint belongs to

sortByProximity

public void sortByProximity(java.net.InetAddress address,
                            java.util.List<java.net.InetAddress> addresses)

Description copied from class: AbstractEndpointSnitch

Sorts the List of node addresses, in-place, by proximity to the given address

Specified by:

sortByProximity in interface IEndpointSnitch

Overrides:

sortByProximity in class AbstractEndpointSnitch

Parameters:

address - the address to sort the proximity by

addresses - the nodes to sort

compareEndpoints

public int compareEndpoints(java.net.InetAddress target,
                            java.net.InetAddress a1,
                            java.net.InetAddress a2)

Description copied from interface: IEndpointSnitch

compares two endpoints in relation to the target endpoint, returning as Comparator.compare would

Specified by:

compareEndpoints in interface IEndpointSnitch

Specified by:

compareEndpoints in class AbstractEndpointSnitch