org.apache.cassandra.locator
Class DynamicEndpointSnitch

java.lang.Object
  org.apache.cassandra.locator.AbstractEndpointSnitch
      org.apache.cassandra.locator.DynamicEndpointSnitch

All Implemented Interfaces:

DynamicEndpointSnitchMBean, IEndpointSnitch, ILatencySubscriber

public class DynamicEndpointSnitch
extends AbstractEndpointSnitch
implements ILatencySubscriber, DynamicEndpointSnitchMBean

A dynamic snitch that sorts endpoints by latency with an adapted phi failure detector

Field Summary

IEndpointSnitch

subsnitch

Constructor Summary

DynamicEndpointSnitch(IEndpointSnitch snitch)

Method Summary

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.util.List<java.lang.Double>	dumpTimings(java.lang.String hostname)
double	getBadnessThreshold()
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
int	getResetInterval()
java.util.Map<java.net.InetAddress,java.lang.Double>	getScores()
java.util.List<java.net.InetAddress>	getSortedListByProximity(java.net.InetAddress address, java.util.Collection<java.net.InetAddress> addresses) returns a new List sorted by proximity to the given endpoint
java.lang.String	getSubsnitchClassName()
int	getUpdateInterval()
void	gossiperStarting() called after Gossiper instance exists immediately before it starts gossiping
void	receiveTiming(java.net.InetAddress host, java.lang.Double latency)
void	sortByProximity(java.net.InetAddress address, java.util.List<java.net.InetAddress> addresses) This method will sort the List by proximity to the given address.
void	unregisterMBean()

Methods inherited from class java.lang.Object

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

Field Detail

subsnitch

public final IEndpointSnitch subsnitch

Constructor Detail

DynamicEndpointSnitch

public DynamicEndpointSnitch(IEndpointSnitch snitch)

Method Detail

unregisterMBean

public void unregisterMBean()

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

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

Specified by:

getRack in interface IEndpointSnitch

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

Specified by:

getDatacenter in interface IEndpointSnitch

getSortedListByProximity

public java.util.List<java.net.InetAddress> getSortedListByProximity(java.net.InetAddress address,
                                                                     java.util.Collection<java.net.InetAddress> addresses)

Description copied from interface: IEndpointSnitch

returns a new List sorted by proximity to the given endpoint

Specified by:

getSortedListByProximity in interface IEndpointSnitch

Specified by:

getSortedListByProximity in class AbstractEndpointSnitch

sortByProximity

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

Description copied from interface: IEndpointSnitch

This method will sort the List by proximity to the given address.

Specified by:

sortByProximity in interface IEndpointSnitch

Specified by:

sortByProximity in class AbstractEndpointSnitch

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

Overrides:

compareEndpoints in class AbstractEndpointSnitch

receiveTiming

public void receiveTiming(java.net.InetAddress host,
                          java.lang.Double latency)

Specified by:

receiveTiming in interface ILatencySubscriber

getScores

public java.util.Map<java.net.InetAddress,java.lang.Double> getScores()

Specified by:

getScores in interface DynamicEndpointSnitchMBean

getUpdateInterval

public int getUpdateInterval()

Specified by:

getUpdateInterval in interface DynamicEndpointSnitchMBean

getResetInterval

public int getResetInterval()

Specified by:

getResetInterval in interface DynamicEndpointSnitchMBean

getBadnessThreshold

public double getBadnessThreshold()

Specified by:

getBadnessThreshold in interface DynamicEndpointSnitchMBean

getSubsnitchClassName

public java.lang.String getSubsnitchClassName()

Specified by:

getSubsnitchClassName in interface DynamicEndpointSnitchMBean

dumpTimings

public java.util.List<java.lang.Double> dumpTimings(java.lang.String hostname)
                                             throws java.net.UnknownHostException

Specified by:

dumpTimings in interface DynamicEndpointSnitchMBean

Throws:

java.net.UnknownHostException