Package za.co.wethinkcode.robots.server.worldinfo

Class WorldStateIdentity

java.lang.Object

za.co.wethinkcode.robots.server.worldinfo.WorldStateIdentity

public class WorldStateIdentity
extends Object

Pointer Class that holds the lastest WorldState and gracefully applies the compare and swap algorithm

Constructor Summary

Constructors

Constructor	Description
WorldStateIdentity(AtomicReference<WorldState> initialWorldState)	Constructor for this WorldState Identity

Method Summary

Modifier and Type	Method	Description
ClientCommandResult	applyCommandSafely(ClientCommand unevaluatedCommand, ClientCommandRequest req)	Core Compare and Swap loop necessary for atomic operations.
WorldState	getWorldState()	Standard getter of the World State from this class's Atomic Pointer

Methods inherited from class java.lang.Object

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

Constructor Details

WorldStateIdentity

public WorldStateIdentity(AtomicReference<WorldState> initialWorldState)

Constructor for this WorldState Identity

Parameters:

initialWorldState - the WorldState that this compare and Swap started with.

Method Details

getWorldState

public WorldState getWorldState()

Standard getter of the World State from this class's Atomic Pointer

Returns:

the current WorldState

applyCommandSafely

public ClientCommandResult applyCommandSafely(ClientCommand unevaluatedCommand,
 ClientCommandRequest req)

Core Compare and Swap loop necessary for atomic operations. Evaluates based on worldState and only changes the state once the evaluation is complete

Parameters:

unevaluatedCommand - A command that has not been evaluated

req - client command request

Returns:

Resolved Client Command