Package org.apache.cassandra.locator

Class AbstractEndpointSnitch

java.lang.Object

org.apache.cassandra.locator.AbstractEndpointSnitch

All Implemented Interfaces:

IEndpointSnitch

Direct Known Subclasses:

AbstractNetworkTopologySnitch, DynamicEndpointSnitch, SimpleSnitch

public abstract class AbstractEndpointSnitch
extends Object
implements IEndpointSnitch

Constructor Summary

Constructors

Constructor	Description
AbstractEndpointSnitch()

Method Summary

Modifier and Type	Method	Description
abstract int	compareEndpoints(InetAddressAndPort target, Replica r1, Replica r2)	compares two endpoints in relation to the target endpoint, returning as Comparator.compare would
void	gossiperStarting()	called after Gossiper instance exists immediately before it starts gossiping
boolean	isWorthMergingForRangeQuery(ReplicaCollection<?> merged, ReplicaCollection<?> l1, ReplicaCollection<?> l2)	Returns whether for a range query doing a query against merged is likely to be faster than 2 sequential queries, one against l1 followed by one against l2.
<C extends ReplicaCollection<? extends C>> C	sortedByProximity(InetAddressAndPort address, C unsortedAddress)	Sorts the Collection of node addresses by proximity to the given address

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.locator.IEndpointSnitch

getDatacenter, getDatacenter, getDatacenter, getLocalDatacenter, getLocalRack, getRack, validate

Constructor Details

AbstractEndpointSnitch

public AbstractEndpointSnitch()

Method Details

compareEndpoints

public abstract int compareEndpoints(InetAddressAndPort target,
 Replica r1,
 Replica r2)

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

sortedByProximity

public <C extends ReplicaCollection<? extends C>> C sortedByProximity(InetAddressAndPort address,
 C unsortedAddress)

Sorts the Collection of node addresses by proximity to the given address

Specified by:

sortedByProximity in interface IEndpointSnitch

Parameters:

address - the address to sort by proximity to

unsortedAddress - the nodes to sort

Returns:

a new sorted List

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

isWorthMergingForRangeQuery

public boolean isWorthMergingForRangeQuery(ReplicaCollection<?> merged,
 ReplicaCollection<?> l1,
 ReplicaCollection<?> l2)

Description copied from interface: IEndpointSnitch

Returns whether for a range query doing a query against merged is likely to be faster than 2 sequential queries, one against l1 followed by one against l2.

Specified by:

isWorthMergingForRangeQuery in interface IEndpointSnitch