io.nadron.service.impl

Class GameStateManager

java.lang.Object

io.nadron.service.impl.GameStateManager

All Implemented Interfaces:

GameStateManagerService

public class GameStateManager
extends Object
implements GameStateManagerService

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG
(package private) byte[]	serializedBytes
private Object	state
private AtomicInteger	syncKey

Constructor Summary

Constructors

Constructor and Description
GameStateManager()
GameStateManager(Object state, AtomicInteger syncKey)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	compareAndSetState(Object key, Object state) This method is actually a combination of compareAndSetSyncKey and setState.
boolean	compareAndSetSyncKey(Object key) Method used to achieve synchronization while doing state management.
Object	computeAndSetNextState(Object state, Object syncKey, Object stateAlgorithm)
Object	computeNextState(Object state, Object syncKey, Object stateAlgorithm)
byte[]	getSerializedByteArray() Whenever serialization is done from Java object to AMF3, or just plain seriazlied java object, it should be saved in byte array format to the state manager.
Object	getState()
Object	getStateAlgorithm()
Object	getSyncKey() Method used to retrieve the synchronization key object.
void	setSerializedByteArray(byte[] serializedBytes) Whenever serialization is done from Java object to AMF3, or just plain java serialized object, it should be saved in byte array format to the state manager.
void	setState(Object state) Set's current state object.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

state

private Object state

serializedBytes

byte[] serializedBytes

syncKey

private AtomicInteger syncKey

Constructor Detail

GameStateManager

public GameStateManager()

GameStateManager

public GameStateManager(Object state,
                AtomicInteger syncKey)

Method Detail

getState

public Object getState()

Specified by:

getState in interface GameStateManagerService

Returns:

Returns the current state object. This could be any object like a byte array, an object reference that holds a hierarchy of other objects etc. This will be used to manage the state of the game.

setState

public void setState(Object state)

Description copied from interface: GameStateManagerService

Set's current state object. This could be any object like a byte array, an object reference that holds a hierarchy of other objects etc. This will be used to manage the state of the game.

Specified by:

setState in interface GameStateManagerService

compareAndSetState

public boolean compareAndSetState(Object key,
                         Object state)

Description copied from interface: GameStateManagerService

This method is actually a combination of compareAndSetSyncKey and setState. It will take care of setting the new sync key and set state. If the sync key is not valid it will return false, if it is, it will set the state and the new sync key.

Specified by:

compareAndSetState in interface GameStateManagerService

Parameters:

key - Sync key of the incoming object

state - The new state to be set.

Returns:

True if sync key is valid, false if it is invalid.

getSyncKey

public Object getSyncKey()

Description copied from interface: GameStateManagerService

Method used to retrieve the synchronization key object. For the case of Doodler application it is an AtomicInteger.

Specified by:

getSyncKey in interface GameStateManagerService

Returns:

Returns the synchronization key associated with the state manager.

compareAndSetSyncKey

public boolean compareAndSetSyncKey(Object key)

Description copied from interface: GameStateManagerService

Method used to achieve synchronization while doing state management. PictureDataStateManager does it by using an AtomicInteger.

Specified by:

compareAndSetSyncKey in interface GameStateManagerService

Parameters:

key - The current state is wrapped in this object key.

Returns:

True if the atomic compare and set was successful. False otherwise.

getSerializedByteArray

public byte[] getSerializedByteArray()

Description copied from interface: GameStateManagerService

Whenever serialization is done from Java object to AMF3, or just plain seriazlied java object, it should be saved in byte array format to the state manager. This will save re-serialization in case the same object is to be sent again. Below method will return the saved array.

Specified by:

getSerializedByteArray in interface GameStateManagerService

Returns:

Return the latest byte array representation of the state.

setSerializedByteArray

public void setSerializedByteArray(byte[] serializedBytes)

Description copied from interface: GameStateManagerService

Whenever serialization is done from Java object to AMF3, or just plain java serialized object, it should be saved in byte array format to the state manager. This will save re-serialization in case the same object is to be sent again. Below method will set the array to the state manager.

Specified by:

setSerializedByteArray in interface GameStateManagerService

Parameters:

serializedBytes - the serialized AMF3 or other object in byte array format.

computeAndSetNextState

public Object computeAndSetNextState(Object state,
                            Object syncKey,
                            Object stateAlgorithm)
                              throws UnsupportedOperationException

Specified by:

computeAndSetNextState in interface GameStateManagerService

Throws:

UnsupportedOperationException

computeNextState

public Object computeNextState(Object state,
                      Object syncKey,
                      Object stateAlgorithm)
                        throws UnsupportedOperationException

Specified by:

computeNextState in interface GameStateManagerService

Throws:

UnsupportedOperationException

getStateAlgorithm

public Object getStateAlgorithm()
                         throws UnsupportedOperationException

Specified by:

getStateAlgorithm in interface GameStateManagerService

Throws:

UnsupportedOperationException