org.infinispan.distribution.ch
Class ConsistentHashHelper

java.lang.Object
  org.infinispan.distribution.ch.ConsistentHashHelper

public class ConsistentHashHelper
extends Object

A helper class that handles the construction of consistent hash instances based on configuration.

Since:

4.0

Author:

Manik Surtani, Mircea.Markus@jboss.com

Constructor Summary

ConsistentHashHelper()

Method Summary

static ConsistentHash	createConsistentHash(Configuration c, Collection<Address> addresses, Collection<Address> moreAddresses, TopologyInfo topologyInfo) Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.
static ConsistentHash	createConsistentHash(Configuration c, Collection<Address> addresses, TopologyInfo topologyInfo) Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.
static ConsistentHash	createConsistentHash(Configuration c, Collection<Address> addresses, TopologyInfo topologyInfo, Address... moreAddresses) Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.
static ConsistentHash	createConsistentHash(ConsistentHash template, Collection<Address> addresses, TopologyInfo topologyInfo) Creates a new consistent hash instance based on the type specified, and populates the consistent hash with the collection of addresses passed in.
static ConsistentHash	createConsistentHash(ConsistentHash template, Collection<Address> addresses, TopologyInfo topologyInfo, Address... moreAddresses) Creates a new consistent hash instance based on the type specified, and populates the consistent hash with the collection of addresses passed in.
static ConsistentHash	removeAddress(ConsistentHash ch, Address toRemove, Configuration c, TopologyInfo topologyInfo) Returns a new consistent hash of the same type with the given address removed.
static UnionConsistentHash	removeAddressFromUnionConsistentHash(UnionConsistentHash uch, Address toRemove, Configuration c, TopologyInfo topologyInfo) Creates a new UnionConsistentHash instance based on the old instance, removing the provided address from both target consistent hash instances in the union.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConsistentHashHelper

public ConsistentHashHelper()

Method Detail

removeAddress

public static ConsistentHash removeAddress(ConsistentHash ch,
                                           Address toRemove,
                                           Configuration c,
                                           TopologyInfo topologyInfo)

Returns a new consistent hash of the same type with the given address removed.

Parameters:

ch - consistent hash to start with

toRemove - address to remove

c - configuration

topologyInfo -

Returns:

a new consistent hash instance of the same type

removeAddressFromUnionConsistentHash

public static UnionConsistentHash removeAddressFromUnionConsistentHash(UnionConsistentHash uch,
                                                                       Address toRemove,
                                                                       Configuration c,
                                                                       TopologyInfo topologyInfo)

Creates a new UnionConsistentHash instance based on the old instance, removing the provided address from both target consistent hash instances in the union.

Parameters:

uch - union consistent hash instance

toRemove - address to remove

c - configuration

topologyInfo -

Returns:

a new UnionConsistentHash instance

createConsistentHash

public static ConsistentHash createConsistentHash(Configuration c,
                                                  Collection<Address> addresses,
                                                  TopologyInfo topologyInfo)

Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.

Parameters:

c - configuration

addresses - with which to populate the consistent hash

topologyInfo -

Returns:

a new consistent hash instance

createConsistentHash

public static ConsistentHash createConsistentHash(Configuration c,
                                                  Collection<Address> addresses,
                                                  TopologyInfo topologyInfo,
                                                  Address... moreAddresses)

Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.

Parameters:

c - configuration

addresses - with which to populate the consistent hash

topologyInfo -

moreAddresses - to add to the list of addresses @return a new consistent hash instance

createConsistentHash

public static ConsistentHash createConsistentHash(Configuration c,
                                                  Collection<Address> addresses,
                                                  Collection<Address> moreAddresses,
                                                  TopologyInfo topologyInfo)

Creates a new consistent hash instance based on the user's configuration, and populates the consistent hash with the collection of addresses passed in.

Parameters:

c - configuration

addresses - with which to populate the consistent hash

moreAddresses - to add to the list of addresses

topologyInfo -

Returns:

a new consistent hash instance

createConsistentHash

public static ConsistentHash createConsistentHash(ConsistentHash template,
                                                  Collection<Address> addresses,
                                                  TopologyInfo topologyInfo)

Creates a new consistent hash instance based on the type specified, and populates the consistent hash with the collection of addresses passed in.

Parameters:

template - An older consistent hash instance to clone

addresses - with which to populate the consistent hash

topologyInfo -

Returns:

a new consistent hash instance

createConsistentHash

public static ConsistentHash createConsistentHash(ConsistentHash template,
                                                  Collection<Address> addresses,
                                                  TopologyInfo topologyInfo,
                                                  Address... moreAddresses)

Creates a new consistent hash instance based on the type specified, and populates the consistent hash with the collection of addresses passed in.

Parameters:

template - An older consistent hash instance to clone

addresses - with which to populate the consistent hash

topologyInfo -

moreAddresses - to add to the list of addresses @return a new consistent hash instance