Package org.apache.cassandra.locator

Class AzureSnitch

java.lang.Object

org.apache.cassandra.locator.AbstractEndpointSnitch

org.apache.cassandra.locator.AbstractNetworkTopologySnitch

org.apache.cassandra.locator.AzureSnitch

All Implemented Interfaces:

IEndpointSnitch

public class AzureSnitch
extends AbstractNetworkTopologySnitch

AzureSnitch will resolve datacenter and rack by calling /metadata/instance/compute endpoint returning the response in JSON format for API version 2021-12-13. The version of API is configurable via property azure_api_version in cassandra-rackdc.properties.

A datacenter is resolved from location field and a rack is resolved by looking into zone field first. When zone is not set, or it is empty string, it will look into platformFaultDomain field. Such resolved value is prepended by rack- string.

Field Summary

Fields

Modifier and Type	Field	Description
protected final org.apache.cassandra.locator.AbstractCloudMetadataServiceConnector	connector

Constructor Summary

Constructors

Constructor	Description
AzureSnitch()
AzureSnitch(org.apache.cassandra.locator.AbstractCloudMetadataServiceConnector connector)
AzureSnitch(SnitchProperties properties)

Method Summary

Modifier and Type	Method	Description
final String	getDatacenter(InetAddressAndPort endpoint)	Return the data center for which an endpoint resides in
final String	getLocalDatacenter()	returns a String representing the datacenter current endpoint belongs to
final String	getLocalRack()	returns a String representing the rack current endpoint belongs to
final String	getRack(InetAddressAndPort 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

gossiperStarting, 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, validate

Field Details

connector

protected final org.apache.cassandra.locator.AbstractCloudMetadataServiceConnector connector

Constructor Details

AzureSnitch

public AzureSnitch()
            throws IOException

Throws:

IOException

AzureSnitch

public AzureSnitch(SnitchProperties properties)
            throws IOException

Throws:

IOException

AzureSnitch

public AzureSnitch(org.apache.cassandra.locator.AbstractCloudMetadataServiceConnector connector)
            throws IOException

Throws:

IOException

Method Details

getLocalRack

public final String getLocalRack()

Description copied from interface: IEndpointSnitch

returns a String representing the rack current endpoint belongs to

getLocalDatacenter

public final String getLocalDatacenter()

Description copied from interface: IEndpointSnitch

returns a String representing the datacenter current endpoint belongs to

getRack

public final String getRack(InetAddressAndPort 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 final String getDatacenter(InetAddressAndPort 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