dualroids
Class Server

java.lang.Object
  |
  +--dualroids.Server

All Implemented Interfaces:

Runnable

public final class Server

extends Object

implements Runnable

The Dualroids game server.

Field Summary

private Arena	arena The server's copy of the arena
private int	asteroidIndex A counter for controlling the asteroid updating iteration.
private ServerModelConnector[]	connectors An array holding all the connectors through which the server sends data to the clients.
static int	INITIAL_SHIPS The number of spare ships the player has initially.
static long	INVULNERABILITY_PERIOD The duration of the ship invulnerability period when a player gets a new ship.
private int	level The level number counter
private static long	LEVEL_START_DELAY The delay between the beginning of level generation and the start of the level.
static long	MIN_ITERATION_INTERVAL Constant for the minimal interval (in milliseconds) between the starts of two server model update iterations.
static long	NEW_SHIP_DELAY The delay before a new ships appears when a ship has exploded.
private String	playerName The name of the player who is running the server
private static int	SCORE_1UP The interval in scores when player should get an additional spare ship
private int[]	scores The score table.
private int[]	shipsLeft The table of remaining ships.

Constructor Summary

Server(String playerName)
Contructs a new Server.

Method Summary

private void	blowUpShip(int shipIndex, long newAppears) Blows up a ship
private void	checkCollisions(long time) Checks collisions in the arena (ships or bullets hitting asteroids).
private void	flush() Flushes both connectors and thus causes the buffered data in network streams to flush too.
private void	invalidateBullet(int shipIndex, int bulletIndex) Marks a bullet non-flying (not visible).
private void	registerAsteroidHit(int shipIndex, int asteroidIndex, long time) Register a bullet hit to an asteroid.
void	run() The method that starts the server thread.
private void	runLevel() The method for running a level
private void	sendArena() Sends the arena to the clients.
boolean	updateAsteroids(long time) Updates the fields of one asteroid at time and checks whether there are asteroids left.

Methods inherited from class java.lang.Object

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

Field Detail

MIN_ITERATION_INTERVAL

public static final long MIN_ITERATION_INTERVAL

Constant for the minimal interval (in milliseconds) between the starts of two server model update iterations.

LEVEL_START_DELAY

private static final long LEVEL_START_DELAY

The delay between the beginning of level generation and the start of the level.

INVULNERABILITY_PERIOD

public static final long INVULNERABILITY_PERIOD

The duration of the ship invulnerability period when a player gets a new ship.

NEW_SHIP_DELAY

public static final long NEW_SHIP_DELAY

The delay before a new ships appears when a ship has exploded.

INITIAL_SHIPS

public static final int INITIAL_SHIPS

The number of spare ships the player has initially.

SCORE_1UP

private static final int SCORE_1UP

The interval in scores when player should get an additional spare ship

arena

private Arena arena

The server's copy of the arena

connectors

private ServerModelConnector[] connectors

An array holding all the connectors through which the server sends data to the clients.

level

private int level

The level number counter

asteroidIndex

private int asteroidIndex

A counter for controlling the asteroid updating iteration.

scores

private int[] scores

The score table.

shipsLeft

private int[] shipsLeft

The table of remaining ships.

playerName

private String playerName

The name of the player who is running the server

Constructor Detail

Server

public Server(String playerName)

Contructs a new Server.

Parameters:

playerName - the name of the player running the server

Method Detail

run

public void run()

The method that starts the server thread.

Specified by:

run in interface Runnable

runLevel

private final void runLevel()
                     throws GameOverException

The method for running a level

flush

private final void flush()

Flushes both connectors and thus causes the buffered data in network streams to flush too.

checkCollisions

private final void checkCollisions(long time)
                            throws GameOverException

Checks collisions in the arena (ships or bullets hitting asteroids).

Parameters:

time - the moment in time for which the check is to be performed

updateAsteroids

public final boolean updateAsteroids(long time)

Updates the fields of one asteroid at time and checks whether there are asteroids left.

Parameters:

time - the moment in time to be used as the new timestamp

Returns:

true if there are asteroids left and false otherwise

blowUpShip

private final void blowUpShip(int shipIndex,
                              long newAppears)
                       throws GameOverException

Blows up a ship

Parameters:

shipIndex - the index of the ship to blow up

invalidateBullet

private final void invalidateBullet(int shipIndex,
                                    int bulletIndex)

Marks a bullet non-flying (not visible).

Parameters:

shipIndex - the index of the ship owning the bullet

bulletIndex - the index of the bullet

registerAsteroidHit

private final void registerAsteroidHit(int shipIndex,
                                       int asteroidIndex,
                                       long time)

Register a bullet hit to an asteroid. The hit may cause the asteroid to explode and points to be awarded.

Parameters:

shipIndex - the index of the ship that fired the bullet

asteroidIndex - the index of the asteroid

sendArena

private final void sendArena()

Sends the arena to the clients.