com.netflix.priam.identity.token

Class TokenRetrieverUtils

java.lang.Object

com.netflix.priam.identity.token.TokenRetrieverUtils

public class TokenRetrieverUtils
extends java.lang.Object

Common utilities for token retrieval.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TokenRetrieverUtils.GossipParseException This exception is thrown either when instances are not available or when they return invalid response.
static class	TokenRetrieverUtils.InferredTokenOwnership
static class	TokenRetrieverUtils.TokenInformation

Constructor Summary

Constructors

Constructor and Description
TokenRetrieverUtils()

Method Summary

Modifier and Type	Method and Description
static TokenRetrieverUtils.InferredTokenOwnership	inferTokenOwnerFromGossip(com.google.common.collect.ImmutableSet<PriamInstance> allIds, java.lang.String token, java.lang.String dc) Utility method to infer the IP of the owner of a token in a given datacenter.

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenRetrieverUtils

public TokenRetrieverUtils()

Method Detail

inferTokenOwnerFromGossip

public static TokenRetrieverUtils.InferredTokenOwnership inferTokenOwnerFromGossip(com.google.common.collect.ImmutableSet<PriamInstance> allIds,
                                                                                   java.lang.String token,
                                                                                   java.lang.String dc)

Utility method to infer the IP of the owner of a token in a given datacenter. This method uses Cassandra status information to find the owner. While it is ideal to check all the nodes in the ring to see if they agree on the IP to be replaced, in large clusters it may affect the startup performance. This method picks at most 3 random hosts from the ring and see if they all agree on the IP to be replaced. If not, it returns null.

Parameters:

allIds -

token -

dc -

Returns:

IP of the token owner based on gossip information or null if C* status doesn't converge.