Package 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	Description
static final String	SNITCH_PROPERTIES_FILENAME

Constructor Summary

Constructors

Constructor	Description
PropertyFileSnitch()
PropertyFileSnitch(int refreshPeriodInSeconds)

Method Summary

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

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

compareEndpoints

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

isWorthMergingForRangeQuery, sortedByProximity

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, getLocalDatacenter, getLocalRack, validate

Field Details

SNITCH_PROPERTIES_FILENAME

public static final String SNITCH_PROPERTIES_FILENAME

See Also:

• Constant Field Values

Constructor Details

PropertyFileSnitch

public PropertyFileSnitch()
                   throws ConfigurationException

Throws:

ConfigurationException

PropertyFileSnitch

public PropertyFileSnitch(int refreshPeriodInSeconds)
                   throws ConfigurationException

Throws:

ConfigurationException

Method Details

getEndpointInfo

public static String[] getEndpointInfo(InetAddressAndPort 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 String getDatacenter(InetAddressAndPort 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 String getRack(InetAddressAndPort 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(boolean isUpdate)
                         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