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Reshuffling the Evennia package into the new template paradigm.

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Griatch 2015-01-06 14:53:45 +01:00
parent 2846e64833
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src/server/server.py
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"""
This module implements the main Evennia server process, the core of
the game engine.
This module should be started with the 'twistd' executable since it
sets up all the networking features. (this is done automatically
by game/evennia.py).
"""
import time
import sys
import os
if os.name == 'nt':
# For Windows batchfile we need an extra path insertion here.
sys.path.insert(0, os.path.dirname(os.path.dirname(
os.path.dirname(os.path.abspath(__file__)))))
from twisted.web import server, static
from twisted.application import internet, service
from twisted.internet import reactor, defer
import django
django.setup()
from django.db import connection
from django.conf import settings
from src.players.models import PlayerDB
from src.scripts.models import ScriptDB
from src.server.models import ServerConfig
from src.server import initial_setup
from src.utils.utils import get_evennia_version, mod_import, make_iter
from src.comms import channelhandler
from src.server.sessionhandler import SESSIONS
# setting up server-side field cache
from django.db.models.signals import post_save
from src.server.caches import field_post_save
#pre_save.connect(field_pre_save, dispatch_uid="fieldcache")
post_save.connect(field_post_save, dispatch_uid="fieldcache")
#from src.server.caches import post_attr_update
#from django.db.models.signals import m2m_changed
# connect to attribute cache signal
#m2m_changed.connect(post_attr_update, sender=TypedObject.db_attributes.through)
_SA = object.__setattr__
if os.name == 'nt':
# For Windows we need to handle pid files manually.
SERVER_PIDFILE = os.path.join(settings.GAME_DIR, 'server.pid')
# a file with a flag telling the server to restart after shutdown or not.
SERVER_RESTART = os.path.join(settings.GAME_DIR, 'server.restart')
# module containing hook methods called during start_stop
SERVER_STARTSTOP_MODULE = mod_import(settings.AT_SERVER_STARTSTOP_MODULE)
# module containing plugin services
SERVER_SERVICES_PLUGIN_MODULES = [mod_import(module) for module in make_iter(settings.SERVER_SERVICES_PLUGIN_MODULES)]
#------------------------------------------------------------
# Evennia Server settings
#------------------------------------------------------------
SERVERNAME = settings.SERVERNAME
VERSION = get_evennia_version()
AMP_ENABLED = True
AMP_HOST = settings.AMP_HOST
AMP_PORT = settings.AMP_PORT
AMP_INTERFACE = settings.AMP_INTERFACE
WEBSERVER_PORTS = settings.WEBSERVER_PORTS
WEBSERVER_INTERFACES = settings.WEBSERVER_INTERFACES
GUEST_ENABLED = settings.GUEST_ENABLED
# server-channel mappings
WEBSERVER_ENABLED = settings.WEBSERVER_ENABLED and WEBSERVER_PORTS and WEBSERVER_INTERFACES
IMC2_ENABLED = settings.IMC2_ENABLED
IRC_ENABLED = settings.IRC_ENABLED
RSS_ENABLED = settings.RSS_ENABLED
WEBCLIENT_ENABLED = settings.WEBCLIENT_ENABLED
#------------------------------------------------------------
# Evennia Main Server object
#------------------------------------------------------------
class Evennia(object):
"""
The main Evennia server handler. This object sets up the database and
tracks and interlinks all the twisted network services that make up
evennia.
"""
def __init__(self, application):
"""
Setup the server.
application - an instantiated Twisted application
"""
sys.path.append('.')
# create a store of services
self.services = service.IServiceCollection(application)
self.amp_protocol = None # set by amp factory
self.sessions = SESSIONS
self.sessions.server = self
# Database-specific startup optimizations.
self.sqlite3_prep()
# Run the initial setup if needed
self.run_initial_setup()
self.start_time = time.time()
# initialize channelhandler
channelhandler.CHANNELHANDLER.update()
# set a callback if the server is killed abruptly,
# by Ctrl-C, reboot etc.
reactor.addSystemEventTrigger('before', 'shutdown',
self.shutdown, _reactor_stopping=True)
self.game_running = True
self.run_init_hooks()
# Server startup methods
def sqlite3_prep(self):
"""
Optimize some SQLite stuff at startup since we
can't save it to the database.
"""
if ((".".join(str(i) for i in django.VERSION) < "1.2" and settings.DATABASE_ENGINE == "sqlite3")
or (hasattr(settings, 'DATABASES')
and settings.DATABASES.get("default", {}).get('ENGINE', None)
== 'django.db.backends.sqlite3')):
cursor = connection.cursor()
cursor.execute("PRAGMA cache_size=10000")
cursor.execute("PRAGMA synchronous=OFF")
cursor.execute("PRAGMA count_changes=OFF")
cursor.execute("PRAGMA temp_store=2")
def update_defaults(self):
"""
We make sure to store the most important object defaults here, so
we can catch if they change and update them on-objects automatically.
This allows for changing default cmdset locations and default
typeclasses in the settings file and have them auto-update all
already existing objects.
"""
# setting names
settings_names = ("CMDSET_CHARACTER", "CMDSET_PLAYER",
"BASE_PLAYER_TYPECLASS", "BASE_OBJECT_TYPECLASS",
"BASE_CHARACTER_TYPECLASS", "BASE_ROOM_TYPECLASS",
"BASE_EXIT_TYPECLASS", "BASE_SCRIPT_TYPECLASS",
"BASE_CHANNEL_TYPECLASS")
# get previous and current settings so they can be compared
settings_compare = zip([ServerConfig.objects.conf(name) for name in settings_names],
[settings.__getattr__(name) for name in settings_names])
mismatches = [i for i, tup in enumerate(settings_compare) if tup[0] and tup[1] and tup[0] != tup[1]]
if len(mismatches): # can't use any() since mismatches may be [0] which reads as False for any()
# we have a changed default. Import relevant objects and
# run the update
from src.objects.models import ObjectDB
from src.comms.models import ChannelDB
#from src.players.models import PlayerDB
for i, prev, curr in ((i, tup[0], tup[1]) for i, tup in enumerate(settings_compare) if i in mismatches):
# update the database
print " %s:\n '%s' changed to '%s'. Updating unchanged entries in database ..." % (settings_names[i], prev, curr)
if i == 0:
[obj.__setattr__("cmdset_storage", curr) for obj in ObjectDB.objects.filter(db_cmdset_storage__exact=prev)]
if i == 1:
[ply.__setattr__("cmdset_storage", curr) for ply in PlayerDB.objects.filter(db_cmdset_storage__exact=prev)]
if i == 2:
[ply.__setattr__("typeclass_path", curr) for ply in PlayerDB.objects.filter(db_typeclass_path__exact=prev)]
if i in (3, 4, 5, 6):
[obj.__setattr__("typeclass_path", curr) for obj in ObjectDB.objects.filter(db_typeclass_path__exact=prev)]
if i == 7:
[scr.__setattr__("typeclass_path", curr) for scr in ScriptDB.objects.filter(db_typeclass_path__exact=prev)]
if i == 8:
[scr.__setattr__("typeclass_path", curr) for scr in ChannelDB.objects.filter(db_typeclass_path__exact=prev)]
# store the new default and clean caches
ServerConfig.objects.conf(settings_names[i], curr)
ObjectDB.flush_instance_cache()
PlayerDB.flush_instance_cache()
ScriptDB.flush_instance_cache()
ChannelDB.flush_instance_cache()
# if this is the first start we might not have a "previous"
# setup saved. Store it now.
[ServerConfig.objects.conf(settings_names[i], tup[1])
for i, tup in enumerate(settings_compare) if not tup[0]]
def run_initial_setup(self):
"""
This attempts to run the initial_setup script of the server.
It returns if this is not the first time the server starts.
Once finished the last_initial_setup_step is set to -1.
"""
last_initial_setup_step = ServerConfig.objects.conf('last_initial_setup_step')
if not last_initial_setup_step:
# None is only returned if the config does not exist,
# i.e. this is an empty DB that needs populating.
print ' Server started for the first time. Setting defaults.'
initial_setup.handle_setup(0)
print '-' * 50
elif int(last_initial_setup_step) >= 0:
# a positive value means the setup crashed on one of its
# modules and setup will resume from this step, retrying
# the last failed module. When all are finished, the step
# is set to -1 to show it does not need to be run again.
print ' Resuming initial setup from step %(last)s.' % \
{'last': last_initial_setup_step}
initial_setup.handle_setup(int(last_initial_setup_step))
print '-' * 50
def run_init_hooks(self):
"""
Called every server start
"""
from src.objects.models import ObjectDB
#from src.players.models import PlayerDB
#update eventual changed defaults
self.update_defaults()
#print "run_init_hooks:", ObjectDB.get_all_cached_instances()
[o.at_init() for o in ObjectDB.get_all_cached_instances()]
[p.at_init() for p in PlayerDB.get_all_cached_instances()]
with open(SERVER_RESTART, 'r') as f:
mode = f.read()
if mode in ('True', 'reload'):
from src.server.oobhandler import OOB_HANDLER
OOB_HANDLER.restore()
from src.scripts.tickerhandler import TICKER_HANDLER
TICKER_HANDLER.restore()
# call correct server hook based on start file value
if mode in ('True', 'reload'):
# True was the old reload flag, kept for compatibilty
self.at_server_reload_start()
elif mode in ('reset', 'shutdown'):
self.at_server_cold_start()
# clear eventual lingering session storages
ObjectDB.objects.clear_all_sessids()
# always call this regardless of start type
self.at_server_start()
def set_restart_mode(self, mode=None):
"""
This manages the flag file that tells the runner if the server is
reloading, resetting or shutting down. Valid modes are
'reload', 'reset', 'shutdown' and None.
If mode is None, no change will be done to the flag file.
Either way, the active restart setting (Restart=True/False) is
returned so the server knows which more it's in.
"""
if mode is None:
with open(SERVER_RESTART, 'r') as f:
# mode is either shutdown, reset or reload
mode = f.read()
else:
with open(SERVER_RESTART, 'w') as f:
f.write(str(mode))
return mode
@defer.inlineCallbacks
def shutdown(self, mode=None, _reactor_stopping=False):
"""
Shuts down the server from inside it.
mode - sets the server restart mode.
'reload' - server restarts, no "persistent" scripts
are stopped, at_reload hooks called.
'reset' - server restarts, non-persistent scripts stopped,
at_shutdown hooks called.
'shutdown' - like reset, but server will not auto-restart.
None - keep currently set flag from flag file.
_reactor_stopping - this is set if server is stopped by a kill
command OR this method was already called
once - in both cases the reactor is
dead/stopping already.
"""
if _reactor_stopping and hasattr(self, "shutdown_complete"):
# this means we have already passed through this method
# once; we don't need to run the shutdown procedure again.
defer.returnValue(None)
mode = self.set_restart_mode(mode)
# call shutdown hooks on all cached objects
from src.objects.models import ObjectDB
#from src.players.models import PlayerDB
from src.server.models import ServerConfig
if mode == 'reload':
# call restart hooks
yield [o.at_server_reload() for o in ObjectDB.get_all_cached_instances()]
yield [p.at_server_reload() for p in PlayerDB.get_all_cached_instances()]
yield [(s.pause(), s.at_server_reload())
for s in ScriptDB.get_all_cached_instances()]
yield self.sessions.all_sessions_portal_sync()
ServerConfig.objects.conf("server_restart_mode", "reload")
from src.server.oobhandler import OOB_HANDLER
OOB_HANDLER.save()
from src.scripts.tickerhandler import TICKER_HANDLER
TICKER_HANDLER.save()
self.at_server_reload_stop()
else:
if mode == 'reset':
# don't unset the is_connected flag on reset, otherwise
# same as shutdown
yield [o.at_server_shutdown() for o in ObjectDB.get_all_cached_instances()]
yield [p.at_server_shutdown() for p in PlayerDB.get_all_cached_instances()]
else: # shutdown
yield [_SA(p, "is_connected", False) for p in PlayerDB.get_all_cached_instances()]
yield [o.at_server_shutdown() for o in ObjectDB.get_all_cached_instances()]
yield [(p.unpuppet_all(), p.at_server_shutdown())
for p in PlayerDB.get_all_cached_instances()]
yield [s.at_server_shutdown() for s in ScriptDB.get_all_cached_instances()]
yield ObjectDB.objects.clear_all_sessids()
ServerConfig.objects.conf("server_restart_mode", "reset")
self.at_server_cold_stop()
# stopping time
from src.utils import gametime
gametime.save()
self.at_server_stop()
# if _reactor_stopping is true, reactor does not need to
# be stopped again.
if os.name == 'nt' and os.path.exists(SERVER_PIDFILE):
# for Windows we need to remove pid files manually
os.remove(SERVER_PIDFILE)
if not _reactor_stopping:
# this will also send a reactor.stop signal, so we set a
# flag to avoid loops.
self.shutdown_complete = True
reactor.callLater(0, reactor.stop)
# server start/stop hooks
def at_server_start(self):
"""
This is called every time the server starts up, regardless of
how it was shut down.
"""
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_start()
def at_server_stop(self):
"""
This is called just before a server is shut down, regardless
of it is fore a reload, reset or shutdown.
"""
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_stop()
def at_server_reload_start(self):
"""
This is called only when server starts back up after a reload.
"""
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_reload_start()
def at_server_reload_stop(self):
"""
This is called only time the server stops before a reload.
"""
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_reload_stop()
def at_server_cold_start(self):
"""
This is called only when the server starts "cold", i.e. after a
shutdown or a reset.
"""
if GUEST_ENABLED:
for guest in PlayerDB.objects.all().filter(db_typeclass_path=settings.BASE_GUEST_TYPECLASS):
for character in filter(None, guest.db._playable_characters):
character.delete()
guest.delete()
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_cold_start()
def at_server_cold_stop(self):
"""
This is called only when the server goes down due to a shutdown or reset.
"""
if SERVER_STARTSTOP_MODULE:
SERVER_STARTSTOP_MODULE.at_server_cold_stop()
#------------------------------------------------------------
#
# Start the Evennia game server and add all active services
#
#------------------------------------------------------------
# Tell the system the server is starting up; some things are not available yet
ServerConfig.objects.conf("server_starting_mode", True)
# twistd requires us to define the variable 'application' so it knows
# what to execute from.
application = service.Application('Evennia')
# The main evennia server program. This sets up the database
# and is where we store all the other services.
EVENNIA = Evennia(application)
print '-' * 50
print ' %(servername)s Server (%(version)s) started.' % {'servername': SERVERNAME, 'version': VERSION}
if AMP_ENABLED:
# The AMP protocol handles the communication between
# the portal and the mud server. Only reason to ever deactivate
# it would be during testing and debugging.
ifacestr = ""
if AMP_INTERFACE != '127.0.0.1':
ifacestr = "-%s" % AMP_INTERFACE
print ' amp (to Portal)%s: %s' % (ifacestr, AMP_PORT)
from src.server import amp
factory = amp.AmpServerFactory(EVENNIA)
amp_service = internet.TCPServer(AMP_PORT, factory, interface=AMP_INTERFACE)
amp_service.setName("EvenniaPortal")
EVENNIA.services.addService(amp_service)
if WEBSERVER_ENABLED:
# Start a django-compatible webserver.
from twisted.python import threadpool
from src.server.webserver import DjangoWebRoot, WSGIWebServer
# start a thread pool and define the root url (/) as a wsgi resource
# recognized by Django
threads = threadpool.ThreadPool(minthreads=max(1, settings.WEBSERVER_THREADPOOL_LIMITS[0]),
maxthreads=max(1, settings.WEBSERVER_THREADPOOL_LIMITS[1]))
web_root = DjangoWebRoot(threads)
# point our media resources to url /media
web_root.putChild("media", static.File(settings.MEDIA_ROOT))
# point our static resources to url /static
web_root.putChild("static", static.File(settings.STATIC_ROOT))
web_site = server.Site(web_root, logPath=settings.HTTP_LOG_FILE)
for proxyport, serverport in WEBSERVER_PORTS:
# create the webserver (we only need the port for this)
webserver = WSGIWebServer(threads, serverport, web_site, interface='127.0.0.1')
webserver.setName('EvenniaWebServer%s' % serverport)
EVENNIA.services.addService(webserver)
print " webserver: %s" % serverport
ENABLED = []
if IRC_ENABLED:
# IRC channel connections
ENABLED.append('irc')
if IMC2_ENABLED:
# IMC2 channel connections
ENABLED.append('imc2')
if RSS_ENABLED:
# RSS feed channel connections
ENABLED.append('rss')
if ENABLED:
print " " + ", ".join(ENABLED) + " enabled."
for plugin_module in SERVER_SERVICES_PLUGIN_MODULES:
# external plugin protocols
plugin_module.start_plugin_services(EVENNIA)
print '-' * 50 # end of terminal output
# clear server startup mode
ServerConfig.objects.conf("server_starting_mode", delete=True)
if os.name == 'nt':
# Windows only: Set PID file manually
f = open(os.path.join(settings.GAME_DIR, 'server.pid'), 'w')
f.write(str(os.getpid()))
f.close()