Scripts and Exits updated. Fixed some deep issues with Scripts that caused object-based scripts to not properly shut down in some situations, as well as spawn multiple instances of themselves. I think this should resolve all "at_repeat doubling" issues reported. Due to optimizations in the typeclass cache loader in a previous update, the Exit cmdsets were not properly loaded (they were loaded at cache time, which now doesn't happen as often). So Exits instead rely on the new "at_cmdset_get" hook called by the cmdhandler. It allows dynamic modification of cmdsets just before they are accessed. Resolves issue173 (I hope). Resolves issue180. Resolves issue 181.

src/commands/cmdhandler.py

@@ -84,6 +84,10 @@ def get_and_merge_cmdsets(caller):
     that this is only relevant for logged-in callers.
     """
     # The calling object's cmdset 
+    try:
+        caller.at_cmdset_get()
+    except Exception:
+        logger.log_trace()
     try:
         caller_cmdset = caller.cmdset.current
     except AttributeError:
@@ -103,6 +107,12 @@ def get_and_merge_cmdsets(caller):
         # Gather all cmdsets stored on objects in the room and
         # also in the caller's inventory and the location itself
         local_objlist = location.contents_get(exclude=caller.dbobj) + caller.contents + [location]
+        for obj in local_objlist:
+            try:
+                # call hook in case we need to do dynamic changing to cmdset
+                obj.at_cmdset_get()
+            except Exception:
+                logger.log_trace()
         local_objects_cmdsets = [obj.cmdset.current for obj in local_objlist
                                  if (obj.cmdset.current and obj.locks.check(caller, 'call', no_superuser_bypass=True))]
         for cset in local_objects_cmdsets:

src/commands/cmdsethandler.py

@@ -409,6 +409,17 @@ class CmdSetHandler(object):
             self.obj.cmdset_storage = storage 
         self.update()
 
+    def has_cmdset(self, cmdset_key, must_be_default=False):
+        """
+        checks so the cmdsethandler contains a cmdset with the given key.
+        must_be_default - only match against the default cmdset. 
+        """
+        if must_be_default:
+            return self.cmdset_stack and self.cmdset_stack[0].key == cmdset_key
+        else:
+            return any([cmdset.key == cmdset_key for cmdset in self.cmdset_stack])
+        
+
     def all(self):
         """
         Returns all cmdsets.

src/commands/default/system.py

@@ -226,6 +226,8 @@ class CmdScripts(MuxCommand):
                 else:
                     string = "Stopping script '%s'." % scripts[0].key
                     scripts[0].stop()
+                #import pdb
+                #pdb.set_trace()
                 ScriptDB.objects.validate() #just to be sure all is synced
             else:
                 # multiple matches.

src/objects/models.py

@@ -191,7 +191,6 @@ class ObjectDB(TypedObject):
         self.cmdset = CmdSetHandler(self)
         self.cmdset.update(init_mode=True)
         self.scripts = ScriptHandler(self)
-        self.scripts.validate(init_mode=True)
         self.nicks = ObjectNickHandler(self)    
         
     # Wrapper properties to easily set database fields. These are
@@ -805,6 +804,9 @@ class ObjectDB(TypedObject):
             self.player.character = None
         self.player = None 
 
+        for script in self.scripts.all():
+            script.stop()
+        
         # if self.player:
         #     self.player.user.is_active = False 
         #     self.player.user.save()

src/objects/objects.py

@@ -75,9 +75,27 @@ class Object(TypeClass):
         """ 
         pass
 
+    def basetype_posthook_setup(self):
+        """
+        Called once, after basetype_setup and at_object_creation. This should generally not be overloaded unless
+        you are redefining how a room/exit/object works. It allows for basetype-like setup
+        after the object is created. An example of this is EXITs, who need to know keys, aliases, locks
+        etc to set up their exit-cmdsets.
+        """
+        pass
+
     def at_cache(self):
         """
-        Called whenever this object is cached or reloaded.
+        Called whenever this object is cached to the idmapper backend. 
+        """
+        pass 
+
+    def at_cmdset_get(self):
+        """
+        Called just before cmdsets on this object are requested by the
+        command handler. If changes need to be done on the fly to the cmdset
+        before passing them on to the cmdhandler, this is the place to do it.
+        This is called also if the object currently have no cmdsets.
         """
         pass
 
@@ -423,11 +441,15 @@ class Exit(Object):
         """
         Helper function for creating an exit command set + command.
 
-        Note that exitdbobj is an ObjectDB instance. This is necessary for
+        The command of this cmdset has the same name as the Exit object
-        handling reloads and avoid tracebacks while the typeclass system
+        and allows the exit to react when the player enter the exit's name,
-        is rebooting.
+        triggering the movement between rooms. 
-        """
         
+        Note that exitdbobj is an ObjectDB instance. This is necessary
+        for handling reloads and avoid tracebacks if this is called while
+        the typeclass system is rebooting.
+        """
+        #print "Exit:create_exit_cmdset "
         class ExitCommand(command.Command):
             """
             This is a command that simply cause the caller
@@ -476,7 +498,6 @@ class Exit(Object):
         return exit_cmdset
 
     # Command hooks 
-
     def basetype_setup(self):
         """
         Setup exit-security
@@ -486,20 +507,25 @@ class Exit(Object):
         """
         super(Exit, self).basetype_setup()
 
-        # this is the fundamental thing for making the Exit work: 
-        self.cmdset.add_default(self.create_exit_cmdset(self.dbobj), permanent=False)
-        # an exit should have a destination (this is replaced at creation time)
-        if self.dbobj.location:
-            self.destination = self.dbobj.location 
-
         # setting default locks (overload these in at_object_creation()
         self.locks.add("puppet:false()") # would be weird to puppet an exit ...
         self.locks.add("traverse:all()") # who can pass through exit by default
         self.locks.add("get:false()")    # noone can pick up the exit
  
-    def at_cache(self):
+       # an exit should have a destination (this is replaced at creation time)
-        "Called when the typeclass is re-cached or reloaded. Should usually not be edited."
+        if self.dbobj.location:
-        self.cmdset.add_default(self.create_exit_cmdset(self.dbobj), permanent=False)                
+            self.destination = self.dbobj.location  
+
+    def at_cmdset_get(self):
+        """
+        Called when the cmdset is requested from this object, just before the cmdset is 
+        actually extracted. If no Exit-cmdset is cached, create it now.
+        """ 
+
+        if self.ndb.exit_reset or not self.cmdset.has_cmdset("_exitset", must_be_default=True):
+            # we are resetting, or no exit-cmdset was set. Create one dynamically.
+            self.cmdset.add_default(self.create_exit_cmdset(self.dbobj), permanent=False)                
+            self.ndb.exit_reset = False 
 
     # this and other hooks are what usually can be modified safely. 
 

src/scripts/manager.py

@@ -88,8 +88,8 @@ class ScriptManager(TypedObjectManager):
         key = validate only scripts with a particular key
         dbref = validate only the single script with this particular id. 
 
-        init_mode - When this mode is active, non-persistent scripts
+        init_mode - This is used during server upstart. It causes non-persistent 
-                    will be removed and persistent scripts will be
+                    scripts to be removed and persistent scripts to be
                     force-restarted.
 
         This method also makes sure start any scripts it validates,
@@ -117,26 +117,30 @@ class ScriptManager(TypedObjectManager):
             # This deletes all non-persistent scripts from database            
             nr_stopped += self.remove_non_persistent(obj=obj)
             # turn off the activity flag for all remaining scripts
-            for script in self.all():
+            scripts = self.get_all_scripts()
-                script.is_active = False 
+            for script in scripts:
+                script.dbobj.is_active = False 
+       
+        elif not scripts:
+            # normal operation 
+            if dbref and self.dbref(dbref):
+                scripts = self.get_id(dbref)
+            elif obj:
+                scripts = self.get_all_scripts_on_obj(obj, key=key)            
+            else:
+                scripts = self.get_all_scripts(key=key) #self.model.get_all_cached_instances()
 
-        if dbref and self.dbref(dbref):
-            scripts = self.get_id(dbref)
-        elif scripts:
-            pass
-        elif obj:
-            scripts = self.get_all_scripts_on_obj(obj, key=key)            
-        else:
-            scripts = self.model.get_all_cached_instances()#get_all_scripts(key=key)        
         if not scripts:
+            # no scripts available to validate
             VALIDATE_ITERATION -= 1
             return None, None
+
         #print "scripts to validate: [%s]" % (", ".join(script.key for script in scripts))        
         for script in scripts:
             if script.is_valid():
-                #print "validating %s (%i)" % (script.key, id(script.dbobj)) 
+                #print "validating %s (%i) (init_mode=%s)" % (script.key, id(script.dbobj), init_mode)                                
                 nr_started += script.start(force_restart=init_mode) 
-                #print "back from start."
+                #print "back from start. nr_started=", nr_started
             else:
                 script.stop()
                 nr_stopped += 1

src/scripts/scripts.py

@@ -44,9 +44,10 @@ class ScriptClass(TypeClass):
     def _stop_task(self):
         "stop task runner"
         try:
+            #print "stopping twisted task:", id(self.ndb.twisted_task), self.obj
             self.ndb.twisted_task.stop()            
         except Exception:
-            pass 
+            logger.log_trace()
     def _step_err_callback(self, e):
         "callback for runner errors"
         cname = self.__class__.__name__
@@ -107,30 +108,30 @@ class ScriptClass(TypeClass):
         """
         #print "Script %s (%s) start (active:%s, force:%s) ..." % (self.key, id(self.dbobj), 
         #                                                          self.is_active, force_restart)        
-        if self.dbobj.db_is_active and not force_restart:
+
-            # script already runs.
+        if self.dbobj.is_active and not force_restart:
+            # script already runs and should not be restarted.
             return 0 
 
-        if self.obj:            
+        obj = self.obj
+        if obj:            
             # check so the scripted object is valid and initalized 
             try:
-                dummy = object.__getattribute__(self.obj, 'cmdset')                
+                dummy = object.__getattribute__(obj, 'cmdset')                
             except AttributeError:
                 # this means the object is not initialized.
-                self.dbobj.db_is_active = False
+                self.dbobj.is_active = False
                 return 0 
         # try to start the script 
         try:            
-            self.dbobj.db_is_active = True
+            self.dbobj.is_active = True
-            self.dbobj.save()
             self.at_start()
             if self.dbobj.db_interval > 0:
                 self._start_task()
             return 1
         except Exception:
             logger.log_trace()
-            self.dbobj.db_is_active = False 
+            self.dbobj.is_active = False 
-            self.dbobj.save()
             return 0
 
     def stop(self, kill=False):
@@ -141,6 +142,8 @@ class ScriptClass(TypeClass):
         kill - don't call finishing hooks. 
         """
         #print "stopping script %s" % self.key
+        #import pdb
+        #pdb.set_trace()
         if not kill:
             try:
                 self.at_stop()
@@ -149,11 +152,13 @@ class ScriptClass(TypeClass):
         if self.dbobj.db_interval > 0:
             try:
                 self._stop_task()
-            except Exception:
+            except Exception, e:
+                logger.log_trace("Stopping script %s(%s)" % (self.key, self.id))
                 pass
         try:
             self.dbobj.delete()
         except AssertionError:
+            logger.log_trace()
             return 0
         return 1
 
@@ -175,7 +180,7 @@ class ScriptClass(TypeClass):
         pass
 
 
-# class ScriptClassOld(TypeClass):
+# class ScriptClass(TypeClass):
 #     """
 #     Base class for all Scripts. 
 #     """

src/server/server.py

@@ -22,7 +22,7 @@ from twisted.internet import protocol, reactor, defer
 from twisted.web import server, static
 from django.db import connection
 from django.conf import settings
-from src.utils import reloads
+from src.scripts.models import ScriptDB
 from src.server.models import ServerConfig
 from src.server.sessionhandler import SESSIONS
 from src.server import initial_setup
@@ -99,7 +99,7 @@ class Evennia(object):
         channelhandler.CHANNELHANDLER.update()
         
         # init all global scripts
-        reloads.reload_scripts(init_mode=True)
+        ScriptDB.objects.validate(init_mode=True)
 
         # Make info output to the terminal.         
         self.terminal_output()

src/server/session.py

@@ -182,7 +182,7 @@ class SessionBase(object):
         self.log('Logged in: %s' % self)
 
         # start (persistent) scripts on this object
-        reloads.reload_scripts(obj=self.player.character, init_mode=True)
+        reloads.reload_scripts(obj=self.player.character)
         
         #add session to connected list
         SESSIONS.add_loggedin_session(self)

src/typeclasses/models.py

@@ -747,8 +747,8 @@ class TypedObject(SharedMemoryModel):
             defpath = "src.objects.objects.Object"
             typeclass = object.__getattribute__(self, "_path_import")(defpath)
             if not silent:
-                errstring += "  %s\n%s" % (typeclass, errstring)
+                #errstring = "  %s\n%s" % (typeclass, errstring)
-                errstring += "  Default class '%s' failed to load." % failpath
+                errstring = "  Default class '%s' failed to load." % failpath
                 errstring += "\n  Using Evennia's default class '%s'." % defpath            
                 object.__getattribute__(self, "_display_errmsg")(errstring)
         if not callable(typeclass):
@@ -1083,7 +1083,12 @@ class TypedObject(SharedMemoryModel):
                 def all(self):
                     return [val for val in self.__dict__.keys() 
                             if not val.startswith['_']]                    
-                pass             
+                def __getattribute__(self, key):
+                    # return None if no matching attribute was found. 
+                    try:
+                        return object.__getattribute__(self, key)
+                    except AttributeError:
+                        return None 
             self._ndb_holder = NdbHolder()
             return self._ndb_holder
     #@ndb.setter

src/utils/create.py

@@ -98,13 +98,13 @@ def create_object(typeclass, key=None, location=None,
     new_object.basetype_setup() # setup the basics of Exits, Characters etc.
     new_object.at_object_creation()
     
-    # custom-given variables override the hook
+    # custom-given perms/locks overwrite hooks
     if permissions:
         new_object.permissions = permissions
-    if aliases:
-        new_object.aliases = aliases
     if locks:
         new_object.locks.add(locks)
+    if aliases:
+        new_object.aliases = aliases
 
     # perform a move_to in order to display eventual messages.
     if home:
@@ -114,6 +114,10 @@ def create_object(typeclass, key=None, location=None,
     else:
         # rooms would have location=None.
         new_object.location = None                             
+
+    # post-hook setup (mainly used by Exits)
+    new_object.basetype_posthook_setup()    
+
     new_object.save()
     return new_object
 

src/utils/idmapper/base.py

@@ -103,7 +103,8 @@ class SharedMemoryModel(Model):
             cls.__instance_cache__[instance._get_pk_val()] = instance        
             try:
                 object.__getattribute__(instance, "at_cache")()                
-            except (TypeError, AttributeError):
+            except (TypeError, AttributeError), e:
+                #print e, instance._get_pk_val()
                 pass                 
 
             #key = "%s-%s" % (cls, instance.pk)            

src/utils/reloads.py

@@ -128,23 +128,20 @@ def reload_modules():
     # run through all objects in database, forcing re-caching.
 
      
-def reload_scripts(scripts=None, obj=None, key=None, 
+def reload_scripts(scripts=None, obj=None, key=None, dbref=None):
-                   dbref=None, init_mode=False):
     """
     Run a validation of the script database.
     obj - only validate scripts on this object
     key - only validate scripts with this key
     dbref - only validate the script with this unique idref    
     emit_to_obj - which object to receive error message
-    init_mode - during init-mode, non-persistent scripts are 
-                cleaned out. All persistent scripts are force-started.
 
     """
 
     nr_started, nr_stopped = ScriptDB.objects.validate(scripts=scripts, 
                                                        obj=obj, key=key, 
                                                        dbref=dbref, 
-                                                       init_mode=init_mode)
+                                                       init_mode=False)
     if nr_started or nr_stopped:
         string = " Started %s script(s). Stopped %s invalid script(s)." % \
             (nr_started, nr_stopped)