Package ai.nettogrof.battlesnake.snakes

Class AbstractSearchSnakeAI

java.lang.Object

ai.nettogrof.battlesnake.snakes.AbstractSnakeAI

ai.nettogrof.battlesnake.snakes.AbstractSearchSnakeAI

Direct Known Subclasses:

AbstractTreeSearchSnakeAI

public abstract class AbstractSearchSnakeAI
extends AbstractSnakeAI

Any snake using a search could extend this abstract class it contains basic constant fields, related to the field name in json call from BattleSnake. Also some method that any snake must implements.

Version:

Summer 2022

Author:

carl.lajeunesse

Field Summary

Fields

Modifier and Type	Field	Description
protected String	losing	String that gonna be shout by the snake if snake is in a losing position.
protected int	minusbuffer	Int value that will be subtract from timeout, it's a buffer define in the config file, to take latency/lag into account
protected long	nodeTotalCount	Number of node analyze during the whole game
protected int	timeout	Int value use to check how much time does the snake have do to tree-search, value define by json field
protected long	timeTotal	Total of time used to compute during the whole game
protected String	winning	String that gonna be shout by the snake if snake is in a winning position.

Fields inherited from class ai.nettogrof.battlesnake.snakes.AbstractSnakeAI

apiversion, BOARD, BODY, DOWN, fileConfig, FOUR_SNAKE, gameId, HEAD, HEALTH, height, HEIGHT_FIELD, LEFT, log, MOVESTR, NAME, RIGHT, rules, SHOUT, SINGLE_SNAKE, SNAKES, SQUAD, TURN, TWO_SNAKE, UPWARD, width, WIDTH_FIELD, YOU

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractSearchSnakeAI()	Basic and unsed constructor
protected	AbstractSearchSnakeAI(String gameId)	Constructor with the gameid,

Method Summary

Modifier and Type	Method	Description
protected void	addNodeTotalCount(int childCount)	add node count to total
protected void	addTimeTotal(long time)	Add search time to the total
private AbstractNode	checkWinLost(AbstractNode winner, AbstractNode root, Map<String,String> response)	Check if it's a win or lost
Map<String,String>	end(com.fasterxml.jackson.databind.JsonNode endRequest)	This method will be call at the end of the game, can be override if you want to clean-up some game info.
protected abstract AbstractNode	finishHim(AbstractNode root, AbstractNode winner)	In a winning position, this method try to find the shortest way to win.
protected Map<String,String>	generateResponse(AbstractNode winner, AbstractNode root, com.fasterxml.jackson.databind.JsonNode head)	Generate the response to send, adding a shout if in winning/losing position.
protected Constructor<? extends AbstractSearch>	genSearchType()	This method generate the search type
protected abstract AbstractNode	lastChance(AbstractNode root)	In a losing position, this method try to find the longest way, hpoing that the opponent make a mistake.
protected void	setProperties()	Set the properties to the snake object

Methods inherited from class ai.nettogrof.battlesnake.snakes.AbstractSnakeAI

getFileConfig, getInfo, move, ping, setFileConfig, start

Methods inherited from class java.lang.Object

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

Field Detail

timeout

protected int timeout

Int value use to check how much time does the snake have do to tree-search, value define by json field

minusbuffer

protected int minusbuffer

Int value that will be subtract from timeout, it's a buffer define in the config file, to take latency/lag into account

nodeTotalCount

protected long nodeTotalCount

Number of node analyze during the whole game

timeTotal

protected long timeTotal

Total of time used to compute during the whole game

losing

protected String losing

String that gonna be shout by the snake if snake is in a losing position.

winning

protected String winning

String that gonna be shout by the snake if snake is in a winning position.

Constructor Detail

AbstractSearchSnakeAI

protected AbstractSearchSnakeAI()

Basic and unsed constructor

AbstractSearchSnakeAI

protected AbstractSearchSnakeAI(String gameId)

Constructor with the gameid,

Parameters:

gameId - String of the gameid field receive in the start request.

Method Detail

genSearchType

protected Constructor<? extends AbstractSearch> genSearchType()
                                                       throws ReflectiveOperationException

This method generate the search type

Returns:

Abstract Search

Throws:

ReflectiveOperationException - In case of invalid search type

generateResponse

protected Map<String,String> generateResponse(AbstractNode winner,
                                                    AbstractNode root,
                                                    com.fasterxml.jackson.databind.JsonNode head)

Generate the response to send, adding a shout if in winning/losing position.

Parameters:

winner - the best node

root - the current root node

head - current snake head from the json

Returns:

response for Battlesnake

checkWinLost

private AbstractNode checkWinLost(AbstractNode winner,
                                  AbstractNode root,
                                  Map<String,String> response)

Check if it's a win or lost

Parameters:

winner - the best node

root - the root node

response - the response that gonna be send to the server add shout

Returns:

the best node

lastChance

protected abstract AbstractNode lastChance(AbstractNode root)

In a losing position, this method try to find the longest way, hpoing that the opponent make a mistake.

Parameters:

root - The current Root node

Returns:

the best AbstractNode

finishHim

protected abstract AbstractNode finishHim(AbstractNode root,
                                          AbstractNode winner)

In a winning position, this method try to find the shortest way to win.

Parameters:

root - The current Root node

winner - The predetermine best move

Returns:

the best AbstractNode

addTimeTotal

protected void addTimeTotal(long time)

Add search time to the total

Parameters:

time - time took this turn

addNodeTotalCount

protected void addNodeTotalCount(int childCount)

add node count to total

Parameters:

childCount - total child count

end

public Map<String,String> end(com.fasterxml.jackson.databind.JsonNode endRequest)

This method will be call at the end of the game, can be override if you want to clean-up some game info. And log some info about computing stats.

Overrides:

end in class AbstractSnakeAI

Parameters:

endRequest - Json call received

Returns:

map that can be empty because it will be ignore by BattleSnake server

setProperties

protected void setProperties()

Set the properties to the snake object