self.request.close()
+class Task:
+
+ def __init__(self, name, args=(), kwargs={}):
+ self.name = name
+ self.args = args
+ self.kwargs = kwargs
+ self.todo = 1
+
+
+class Thing:
+
+ def __init__(self, type_, position):
+ self.type = type_
+ self.position = position
+ self.task = Task('wait')
+
+ def task_wait(self):
+ pass
+
+ def task_move(self, direction):
+ if direction == 'UP':
+ self.position[0] -= 1
+ elif direction == 'DOWN':
+ self.position[0] += 1
+ elif direction == 'RIGHT':
+ self.position[1] += 1
+ elif direction == 'LEFT':
+ self.position[1] -= 1
+
+ def decide_task(self):
+ if self.position[1] > 1:
+ self.set_task('move', 'LEFT')
+ elif self.position[1] < 3:
+ self.set_task('move', 'RIGHT')
+ else:
+ self.set_task('wait')
+
+ def set_task(self, task, *args, **kwargs):
+ self.task = Task(task, args, kwargs)
+
+ def proceed(self, is_AI=True):
+ """Further the thing in its tasks.
+
+ Decrements .task.todo; if it thus falls to <= 0, enacts method whose
+ name is 'task_' + self.task.name and sets .task = None. If is_AI, calls
+ .decide_task to decide a self.task.
+ """
+ self.task.todo -= 1
+ if self.task.todo <= 0:
+ task= getattr(self, 'task_' + self.task.name)
+ task(*self.task.args, **self.task.kwargs)
+ self.task = None
+ if is_AI and self.task is None:
+ self.decide_task()
+
+
class World:
- turn = 0
+
+ def __init__(self):
+ self.turn = 0
+ self.map_size = (5, 5)
+ self.map_ = 'xxxxx\n'+\
+ 'x...x\n'+\
+ 'x.X.x\n'+\
+ 'x...x\n'+\
+ 'xxxxx'
+ self.things = [Thing('human', [3, 3]), Thing('monster', [1, 1])]
+ self.player_i = 0
+ self.player = self.things[self.player_i]
def fib(n):
return fib(n-1) + fib(n-2)
+class ArgumentError(Exception):
+ pass
+
+
class CommandHandler:
- def __init__(self, world, queues_out):
- self.world = world
+ def __init__(self, queues_out):
+ from multiprocessing import Pool
self.queues_out = queues_out
+ self.world = World()
+ # self.pool and self.pool_result are currently only needed by the FIB
+ # command and the demo of a parallelized game loop in cmd_inc_p.
+ self.pool = Pool()
+ self.pool_result = None
def send_to(self, connection_id, msg):
"""Send msg to client of connection_id."""
for connection_id in self.queues_out:
self.send_to(connection_id, msg)
+ def stringify_yx(self, tuple_):
+ """Transform tuple (y,x) into string 'Y:'+str(y)+',X:'+str(x)."""
+ return 'Y:' + str(tuple_[0]) + ',X:' + str(tuple_[1])
+
+ def proceed_to_next_player_turn(self, connection_id):
+ """Run game world turns until player can decide their next step.
+
+ Sends a 'TURN_FINISHED' message, then iterates through all non-player
+ things, on each step furthering them in their tasks (and letting them
+ decide new ones if they finish). The iteration order is: first all
+ things that come after the player in the world things list, then (after
+ incrementing the world turn) all that come before the player; then the
+ player's .proceed() is run, and if it does not finish his task, the
+ loop starts at the beginning. Once the player's task is finished, the
+ loop breaks, and client-relevant game data is sent.
+ """
+ self.send_all('TURN_FINISHED ' + str(self.world.turn))
+ while True:
+ for thing in self.world.things[self.world.player_i+1:]:
+ thing.proceed()
+ self.world.turn += 1
+ for thing in self.world.things[:self.world.player_i]:
+ thing.proceed()
+ self.world.player.proceed(is_AI=False)
+ if self.world.player.task is None:
+ break
+ self.send_all('NEW_TURN ' + str(self.world.turn))
+ self.send_all('MAP_SIZE ' + self.stringify_yx(self.world.map_size))
+ self.send_all('TERRAIN\n' + self.world.map_)
+ for thing in self.world.things:
+ self.send_all('THING TYPE:' + thing.type + ' '
+ + self.stringify_yx(thing.position))
+
def cmd_fib(self, tokens, connection_id):
"""Reply with n-th Fibonacci numbers, n taken from tokens[1:].
Numbers are calculated in parallel as far as possible, using fib().
A 'CALCULATING …' message is sent to caller before the result.
"""
- from multiprocessing import Pool
- fib_fail = 'MALFORMED FIB REQUEST'
if len(tokens) < 2:
- self.send_to(connection_id, fib_fail)
- return
+ raise ArgumentError('FIB NEEDS AT LEAST ONE ARGUMENT')
numbers = []
for token in tokens[1:]:
- if token != '0' and token.isdigit():
- numbers += [int(token)]
- else:
- self.send_to(connection_id, fib_fail)
- return
+ if token == '0' or not token.isdigit():
+ raise ArgumentError('FIB ARGUMENTS MUST BE INTEGERS > 0')
+ numbers += [int(token)]
self.send_to(connection_id, 'CALCULATING …')
- with Pool(len(numbers)) as p:
- results = p.map(fib, numbers)
+ results = self.pool.map(fib, numbers)
reply = ' '.join([str(r) for r in results])
self.send_to(connection_id, reply)
- def cmd_inc(self, connection_id):
- """Increment world.turn, send NEW_TURN message to all clients."""
+ def cmd_inc_p(self, connection_id):
+ """Increment world.turn, send game turn data to everyone.
+
+ To simulate game processing waiting times, a one second delay between
+ TURN_FINISHED and NEW_TURN occurs; after NEW_TURN, some expensive
+ calculations are started as pool processes that need to be finished
+ until a further INC finishes the turn.
+
+ This is just a demo structure for how the game loop could work when
+ parallelized. One might imagine a two-step game turn, with a non-action
+ step determining actor tasks (the AI determinations would take the
+ place of the fib calculations here), and an action step wherein these
+ tasks are performed (where now sleep(1) is).
+ """
+ from time import sleep
+ if self.pool_result is not None:
+ self.pool_result.wait()
+ self.send_all('TURN_FINISHED ' + str(self.world.turn))
+ sleep(1)
self.world.turn += 1
self.send_all('NEW_TURN ' + str(self.world.turn))
+ self.send_all('MAP_SIZE ' + self.stringify_yx(self.world.map_size))
+ self.send_all('TERRAIN\n' + self.world.map_)
+ for thing in self.world.things:
+ self.send_all('THING TYPE:' + thing.type + ' '
+ + self.stringify_yx(thing.position))
+ self.pool_result = self.pool.map_async(fib, (35, 35))
def cmd_get_turn(self, connection_id):
"""Send world.turn to caller."""
self.send_to(connection_id, str(self.world.turn))
+ def cmd_move(self, direction, connection_id):
+ """Set player task to 'move' with direction arg, finish player turn."""
+ if not direction in {'UP', 'DOWN', 'RIGHT', 'LEFT'}:
+ raise ArgumentError('MOVE ARGUMENT MUST BE ONE OF: '
+ 'UP, DOWN, RIGHT, LEFT')
+ self.world.player.set_task('move', direction=direction)
+ self.proceed_to_next_player_turn(connection_id)
+
+ def cmd_wait(self, connection_id):
+ """Set player task to 'wait', finish player turn."""
+ self.world.player.set_task('wait')
+ self.proceed_to_next_player_turn(connection_id)
+
def cmd_echo(self, tokens, input_, connection_id):
"""Send message in input_ beyond tokens[0] to caller."""
msg = input_[len(tokens[0]) + 1:]
def handle_input(self, input_, connection_id):
"""Process input_ to command grammar, call command handler if found."""
tokens = [token for token in input_.split(' ') if len(token) > 0]
- if len(tokens) == 0:
- self.send_to(connection_id, 'EMPTY COMMAND')
- elif len(tokens) == 1 and tokens[0] == 'INC':
- self.cmd_inc(connection_id)
- elif len(tokens) == 1 and tokens[0] == 'GET_TURN':
- self.cmd_get_turn(connection_id)
- elif len(tokens) >= 1 and tokens[0] == 'ECHO':
- self.cmd_echo(tokens, input_, connection_id)
- elif len(tokens) >= 1 and tokens[0] == 'ALL':
- self.cmd_all(tokens, input_)
- elif len(tokens) >= 1 and tokens[0] == 'FIB':
- # TODO: Should this really block the whole loop?
- self.cmd_fib(tokens, connection_id)
- else:
- self.send_to(connection_id, 'UNKNOWN COMMAND')
+ try:
+ if len(tokens) == 0:
+ self.send_to(connection_id, 'EMPTY COMMAND')
+ elif len(tokens) == 1 and tokens[0] == 'INC_P':
+ self.cmd_inc_p(connection_id)
+ elif len(tokens) == 1 and tokens[0] == 'GET_TURN':
+ self.cmd_get_turn(connection_id)
+ elif len(tokens) == 1 and tokens[0] == 'WAIT':
+ self.cmd_wait(connection_id)
+ elif len(tokens) == 2 and tokens[0] == 'MOVE':
+ self.cmd_move(tokens[1], connection_id)
+ elif len(tokens) >= 1 and tokens[0] == 'ECHO':
+ self.cmd_echo(tokens, input_, connection_id)
+ elif len(tokens) >= 1 and tokens[0] == 'ALL':
+ self.cmd_all(tokens, input_)
+ elif len(tokens) >= 1 and tokens[0] == 'FIB':
+ # TODO: Should this really block the whole loop?
+ self.cmd_fib(tokens, connection_id)
+ else:
+ self.send_to(connection_id, 'UNKNOWN COMMAND')
+ except ArgumentError as e:
+ self.send_to(connection_id, 'ARGUMENT ERROR: ' + str(e))
def io_loop(q):
sending out replies.
"""
queues_out = {}
- world = World()
- command_handler = CommandHandler(world, queues_out)
+ command_handler = CommandHandler(queues_out)
while True:
x = q.get()
command_type = x[0]
projects / plomrogue2-experiments / blobdiff