org.apache.cassandra.locator
Class Ec2Snitch

java.lang.Object
  org.apache.cassandra.locator.AbstractEndpointSnitch
      org.apache.cassandra.locator.AbstractNetworkTopologySnitch
          org.apache.cassandra.locator.Ec2Snitch

All Implemented Interfaces:

IEndpointSnitch

Direct Known Subclasses:

Ec2MultiRegionSnitch

public class Ec2Snitch
extends AbstractNetworkTopologySnitch

A snitch that assumes an EC2 region is a DC and an EC2 availability_zone is a rack. This information is available in the config for the node.

Field Summary

protected java.lang.String	ec2region
protected java.lang.String	ec2zone
protected static org.slf4j.Logger	logger
protected static java.lang.String	ZONE_NAME_QUERY_URL

Constructor Summary

Ec2Snitch()

Method Summary

java.lang.String	getDatacenter(java.net.InetAddress endpoint) Return the data center for which an endpoint resides in
java.lang.String	getRack(java.net.InetAddress endpoint) Return the rack for which an endpoint resides in

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

compareEndpoints

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

getSortedListByProximity, gossiperStarting, isWorthMergingForRangeQuery, sortByProximity

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

ZONE_NAME_QUERY_URL

protected static final java.lang.String ZONE_NAME_QUERY_URL

See Also:

Constant Field Values

ec2zone

protected java.lang.String ec2zone

ec2region

protected java.lang.String ec2region

Constructor Detail

Ec2Snitch

public Ec2Snitch()
          throws java.io.IOException,
                 ConfigurationException

Throws:

java.io.IOException

ConfigurationException

Method Detail

getRack

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

Description copied from class: AbstractNetworkTopologySnitch

Return the rack for which an endpoint resides in

Specified by:

getRack in interface IEndpointSnitch

Specified by:

getRack in class AbstractNetworkTopologySnitch

Parameters:

endpoint - a specified endpoint

Returns:

string of rack

getDatacenter

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

Description copied from class: AbstractNetworkTopologySnitch

Return the data center for which an endpoint resides in

Specified by:

getDatacenter in interface IEndpointSnitch

Specified by:

getDatacenter in class AbstractNetworkTopologySnitch

Parameters:

endpoint - a specified endpoint

Returns:

string of data center