net.spy.memcached

Class ArrayModNodeLocator

java.lang.Object

net.spy.memcached.ArrayModNodeLocator

All Implemented Interfaces:

NodeLocator

public final class ArrayModNodeLocator
extends Object
implements NodeLocator

NodeLocator implementation for dealing with simple array lookups using a modulus of the hash code and node list length.

Constructor Summary

Constructors

Constructor and Description
ArrayModNodeLocator(List<MemcachedNode> n, HashAlgorithm alg) Construct an ArraymodNodeLocator over the given array of nodes and using the given hash algorithm.

Method Summary

Modifier and Type	Method and Description
Collection<MemcachedNode>	getAll() Get all memcached nodes.
MemcachedNode	getPrimary(String k) Get the primary location for the given key.
NodeLocator	getReadonlyCopy() Create a read-only copy of this NodeLocator.
Iterator<MemcachedNode>	getSequence(String k) Get an iterator over the sequence of nodes that make up the backup locations for a given key.
void	updateLocator(List<MemcachedNode> newNodes) Update locator status.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayModNodeLocator

public ArrayModNodeLocator(List<MemcachedNode> n,
                           HashAlgorithm alg)

Construct an ArraymodNodeLocator over the given array of nodes and using the given hash algorithm.

Parameters:

n - the array of nodes

alg - the hash algorithm

Method Detail

getAll

public Collection<MemcachedNode> getAll()

Description copied from interface: NodeLocator

Get all memcached nodes. This is useful for broadcasting messages.

Specified by:

getAll in interface NodeLocator

getPrimary

public MemcachedNode getPrimary(String k)

Description copied from interface: NodeLocator

Get the primary location for the given key.

Specified by:

getPrimary in interface NodeLocator

Parameters:

k - the object key

Returns:

the QueueAttachment containing the primary storage for a key

getSequence

public Iterator<MemcachedNode> getSequence(String k)

Description copied from interface: NodeLocator

Get an iterator over the sequence of nodes that make up the backup locations for a given key.

Specified by:

getSequence in interface NodeLocator

Parameters:

k - the object key

Returns:

the sequence of backup nodes.

getReadonlyCopy

public NodeLocator getReadonlyCopy()

Description copied from interface: NodeLocator

Create a read-only copy of this NodeLocator.

Specified by:

getReadonlyCopy in interface NodeLocator

updateLocator

public void updateLocator(List<MemcachedNode> newNodes)

Description copied from interface: NodeLocator

Update locator status.

Specified by:

updateLocator in interface NodeLocator

Parameters:

newNodes - New locator nodes.