org.apache.cassandra.locator

Class PropertyFileSnitch

java.lang.Object

org.apache.cassandra.locator.AbstractEndpointSnitch

org.apache.cassandra.locator.AbstractNetworkTopologySnitch

org.apache.cassandra.locator.PropertyFileSnitch

All Implemented Interfaces:

IEndpointSnitch

public class PropertyFileSnitch
extends AbstractNetworkTopologySnitch

Used to determine if two IP's are in the same datacenter or on the same rack.

Based on a properties file in the following format: 10.0.0.13=DC1:RAC2 10.21.119.14=DC3:RAC2 10.20.114.15=DC2:RAC2 default=DC1:r1

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	SNITCH_PROPERTIES_FILENAME

Constructor Summary

Constructors

Constructor and Description
PropertyFileSnitch()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getDatacenter(java.net.InetAddress endpoint) Return the data center for which an endpoint resides in
java.lang.String[]	getEndpointInfo(java.net.InetAddress endpoint) Get the raw information about an end point
java.lang.String	getRack(java.net.InetAddress endpoint) Return the rack for which an endpoint resides in
void	gossiperStarting() called after Gossiper instance exists immediately before it starts gossiping
void	reloadConfiguration()

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

Field Detail

SNITCH_PROPERTIES_FILENAME

public static final java.lang.String SNITCH_PROPERTIES_FILENAME

See Also:

Constant Field Values

Constructor Detail

PropertyFileSnitch

public PropertyFileSnitch()
                   throws ConfigurationException

Throws:

ConfigurationException

Method Detail

getEndpointInfo

public java.lang.String[] getEndpointInfo(java.net.InetAddress endpoint)

Get the raw information about an end point

Parameters:

endpoint - endpoint to process

Returns:

a array of string with the first index being the data center and the second being the rack

getDatacenter

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

Return the data center for which an endpoint resides in

Specified by:

getDatacenter in interface IEndpointSnitch

Specified by:

getDatacenter in class AbstractNetworkTopologySnitch

Parameters:

endpoint - the endpoint to process

Returns:

string of data center

getRack

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

Return the rack for which an endpoint resides in

Specified by:

getRack in interface IEndpointSnitch

Specified by:

getRack in class AbstractNetworkTopologySnitch

Parameters:

endpoint - the endpoint to process

Returns:

string of rack

reloadConfiguration

public void reloadConfiguration()
                         throws ConfigurationException

Throws:

ConfigurationException

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