import logging from thespian.actors import * from thespian.system.utilis import (thesplog, checkActorCapabilities, foldl, join, fmap, AssocList, actualActorClass) from thespian.system.timing import ExpirationTimer from thespian.system.logdirector import LogAggregator from thespian.system.admin.globalNames import GlobalNamesAdmin from thespian.system.admin.adminCore import PendingSource from thespian.system.transport import (TransmitIntent, ReceiveEnvelope, Thespian__Run_Terminated) from thespian.system.messages.admin import PendingActorResponse from thespian.system.messages.convention import * from thespian.system.sourceLoader import loadModuleFromHashSource from thespian.system.transport.hysteresis import HysteresisDelaySender from functools import partial from datetime import timedelta CONVENTION_REREGISTRATION_PERIOD = timedelta(minutes=7, seconds=22) CONVENTION_RESTART_PERIOD = timedelta(minutes=3, seconds=22) CONVENTION_REGISTRATION_MISS_MAX = 3 # # of missing convention registrations before death declared CONVENTION_REINVITE_ADJUSTMENT = 1.1 # multiply by remote checkin expected time for new invite timeout period def convention_reinvite_adjustment(t): try: return t * CONVENTION_REINVITE_ADJUSTMENT except TypeError: # Python2 cannot multiply timedelta by a float, so take a longer route return t + (t / int(1 / (CONVENTION_REINVITE_ADJUSTMENT % 1))) class PreRegistration(object): def __init__(self): self.pingValid = ExpirationTimer(timedelta(seconds=0)) self.pingPending = False def refresh(self): self.pingValid = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD) class ConventionMemberData(object): def __init__(self, address, capabilities, preRegOnly=False): self.remoteAddress = address self.remoteCapabilities = capabilities self.hasRemoteActors = [] # (localParent, remoteActor) addresses created remotely # The preRegOnly field indicates that this information is only # from a pre-registration. self.preRegOnly = preRegOnly # preRegistered is not None if the ConventionRegister has the # preRegister flag set. This indicates a call from # preRegisterRemoteSystem. The pingValid is only used for # preRegistered systems and is used to determine how long an # active check of the preRegistered remote is valid. If # pingValid is expired, the local attempts to send a # QueryExists message (which will retry) and a QueryAck will # reset pingValid to another CONVENTION_REGISTRATION_PERIOD. # The pingPending is true while the QueryExists is pending and # will suppress additional pingPending messages. A success or # failure completion of a QueryExists message will reset # pingPending to false. Note that pinging occurs continually # for a preRegistered remote, regardless of whether or not its # Convention membership is currently valid. self.preRegistered = None # or PreRegistration object self._reset_valid_timer() @property def permanentEntry(self): return bool(self.preRegOnly or self.preRegistered) def createdActor(self, localParentAddress, newActorAddress): entry = localParentAddress, newActorAddress if entry not in self.hasRemoteActors: self.hasRemoteActors.append(entry) def refresh(self, remoteCapabilities, preReg=False): self.remoteCapabilities = remoteCapabilities self._reset_valid_timer() if self.preRegistered: self.preRegistered.refresh() def _reset_valid_timer(self): # registryValid is a timer that is usually set to a multiple # of the convention re-registration period. Each successful # convention re-registration resets the timer to the maximum # value (actually, it replaces this structure with a newly # generated structure). If the timer expires, the remote is # declared as dead and the registration is removed (or # quiesced if it is a pre-registration). self.registryValid = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD * CONVENTION_REGISTRATION_MISS_MAX) def __str__(self): return 'ActorSystem @ %s%s, registry valid for %s with %s' % ( str(self.remoteAddress), (' (prereg-only)' if self.preRegOnly else (' (prereg)' if self.preRegistered else '')), str(self.registryValid), str(self.remoteCapabilities)) class HysteresisCancel(object): def __init__(self, cancel_addr): self.cancel_addr = cancel_addr class HysteresisSend(TransmitIntent): pass class LostRemote(object): # tells transport to reset (close sockets, drop buffers, etc.) def __init__(self, lost_addr): self.lost_addr = lost_addr class LocalConventionState(object): def __init__(self, myAddress, capabilities, sCBStats, getConventionAddressFunc): self._myAddress = myAddress self._capabilities = capabilities self._sCBStats = sCBStats self._conventionMembers = AssocList() # key=Remote Admin Addr, value=ConventionMemberData self._conventionNotificationHandlers = [] self._getConventionAddr = getConventionAddressFunc self._conventionAddress = getConventionAddressFunc(capabilities) self._conventionRegistration = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD) self._has_been_activated = False self._invited = False # entered convention as a result of an explicit invite @property def myAddress(self): return self._myAddress @property def capabilities(self): return self._capabilities def updateStatusResponse(self, resp): resp.setConventionLeaderAddress(self.conventionLeaderAddr) resp.setConventionRegisterTime(self._conventionRegistration) for each in self._conventionMembers.values(): resp.addConventioneer(each.remoteAddress, each.registryValid) resp.setNotifyHandlers(self._conventionNotificationHandlers) def active_in_convention(self): # If this is the convention leader, it is automatically # active, otherwise this convention member should have a # convention leader and that leader should have an active # entry in the _conventionMembers table (indicating it has # updated this system with its information) return bool(self.conventionLeaderAddr and self._conventionMembers.find(self.conventionLeaderAddr)) @property def conventionLeaderAddr(self): return self._conventionAddress def isConventionLeader(self): # Might also be the leader if self.conventionLeaderAddr is None return self.conventionLeaderAddr == self.myAddress def capabilities_have_changed(self, new_capabilities): self._capabilities = new_capabilities return self.setup_convention() def setup_convention(self, activation=False): self._has_been_activated |= activation rmsgs = [] # If not specified in capabilities, don't override any invites # that may have been received. self._conventionAddress = self._getConventionAddr(self.capabilities) or \ self._conventionAddress leader_is_gone = (self._conventionMembers.find(self.conventionLeaderAddr) is None) \ if self.conventionLeaderAddr else True if not self.isConventionLeader() and self.conventionLeaderAddr: thesplog('Admin registering with Convention @ %s (%s)', self.conventionLeaderAddr, 'first time' if leader_is_gone else 're-registering', level=logging.INFO, primary=True) rmsgs.append( HysteresisSend(self.conventionLeaderAddr, ConventionRegister(self.myAddress, self.capabilities, leader_is_gone), onSuccess = self._setupConventionCBGood, onError = self._setupConventionCBError)) rmsgs.append(LogAggregator(self.conventionLeaderAddr)) self._conventionRegistration = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD) return rmsgs def _setupConventionCBGood(self, result, finishedIntent): self._sCBStats.inc('Admin Convention Registered') if hasattr(self, '_conventionLeaderMissCount'): delattr(self, '_conventionLeaderMissCount') def _setupConventionCBError(self, result, finishedIntent): self._sCBStats.inc('Admin Convention Registration Failed') if hasattr(self, '_conventionLeaderMissCount'): self._conventionLeaderMissCount += 1 else: self._conventionLeaderMissCount = 1 thesplog('Admin cannot register with convention @ %s (miss %d): %s', finishedIntent.targetAddr, self._conventionLeaderMissCount, result, level=logging.WARNING, primary=True) def got_convention_invite(self, sender): self._conventionAddress = sender self._invited = True return self.setup_convention() def got_convention_register(self, regmsg): # Called when remote convention member has sent a ConventionRegister message self._sCBStats.inc('Admin Handle Convention Registration') if self._invited and not self.conventionLeaderAddr: # Lost connection to an invitation-only convention. # Cannot join again until another invitation is received. return [] # Registrant may re-register if changing capabilities rmsgs = [] registrant = regmsg.adminAddress prereg = getattr(regmsg, 'preRegister', False) # getattr used; see definition existing = self._conventionMembers.find(registrant) thesplog('Got Convention %sregistration from %s (%s) (new? %s)', 'pre-' if prereg else '', registrant, 'first time' if regmsg.firstTime else 're-registering', not existing, level=logging.INFO) if registrant == self.myAddress: # Either remote failed getting an external address and is # using 127.0.0.1 or else this is a malicious attempt to # make us talk to ourselves. Ignore it. thesplog('Convention registration from %s is an invalid address; ignoring.', registrant, level=logging.WARNING) return rmsgs existingPreReg = ( # existing.preRegOnly # or existing.preRegistered existing.permanentEntry ) if existing else False notify = (not existing or existing.preRegOnly) and not prereg if regmsg.firstTime or not existing: if existing: existing = None notify = not prereg rmsgs.extend(self._remote_system_cleanup(registrant)) newmember = ConventionMemberData(registrant, regmsg.capabilities, prereg) if prereg or existingPreReg: newmember.preRegistered = PreRegistration() self._conventionMembers.add(registrant, newmember) else: existing.refresh(regmsg.capabilities, prereg or existingPreReg) if not prereg: existing.preRegOnly = False if not self.isConventionLeader(): self._conventionRegistration = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD) # Convention Members normally periodically initiate a # membership message, to which the leader confirms by # responding; if this was a pre-registration, that identifies # this system as the "leader" for that remote. Also, if the # remote sent this because it was a pre-registration leader, # it doesn't yet have all the member information so the member # should respond. #if self.isConventionLeader() or prereg or regmsg.firstTime: if prereg: rmsgs.append(HysteresisCancel(registrant)) rmsgs.append(TransmitIntent(registrant, ConventionInvite())) elif (self.isConventionLeader() or prereg or regmsg.firstTime or \ (existing and existing.permanentEntry)): # If we are the Convention Leader, this would be the point to # inform all other registrants of the new registrant. At # present, there is no reciprocity here, so just update the # new registrant with the leader's info. rmsgs.append( TransmitIntent(registrant, ConventionRegister(self.myAddress, self.capabilities))) if notify: rmsgs.extend(self._notifications_of( ActorSystemConventionUpdate(registrant, regmsg.capabilities, True))) return rmsgs def _notifications_of(self, msg): return [TransmitIntent(H, msg) for H in self._conventionNotificationHandlers] def add_notification_handler(self, addr): if addr not in self._conventionNotificationHandlers: self._conventionNotificationHandlers.append(addr) # Now update the registrant on the current state of all convention members return [TransmitIntent(addr, ActorSystemConventionUpdate(M.remoteAddress, M.remoteCapabilities, True)) for M in self._conventionMembers.values() if not M.preRegOnly] return [] def remove_notification_handler(self, addr): self._conventionNotificationHandlers = [ H for H in self._conventionNotificationHandlers if H != addr] def got_convention_deregister(self, deregmsg): self._sCBStats.inc('Admin Handle Convention De-registration') remoteAdmin = deregmsg.adminAddress if remoteAdmin == self.myAddress: # Either remote failed getting an external address and is # using 127.0.0.1 or else this is a malicious attempt to # make us talk to ourselves. Ignore it. thesplog('Convention deregistration from %s is an invalid address; ignoring.', remoteAdmin, level=logging.WARNING) rmsgs = [] if getattr(deregmsg, 'preRegistered', False): # see definition for getattr use existing = self._conventionMembers.find(remoteAdmin) if existing: existing.preRegistered = None rmsgs.append(TransmitIntent(remoteAdmin, ConventionDeRegister(self.myAddress))) return rmsgs + self._remote_system_cleanup(remoteAdmin) def got_system_shutdown(self): return self.exit_convention() def exit_convention(self): self.invited = False gen_ops = lambda addr: [HysteresisCancel(addr), TransmitIntent(addr, ConventionDeRegister(self.myAddress)), ] terminate = lambda a: [ self._remote_system_cleanup(a), gen_ops(a) ][-1] if self.conventionLeaderAddr and \ self.conventionLeaderAddr != self.myAddress: thesplog('Admin de-registering with Convention @ %s', str(self.conventionLeaderAddr), level=logging.INFO, primary=True) # Cache convention leader address because it might get reset by terminate() claddr = self.conventionLeaderAddr terminate(self.conventionLeaderAddr) return gen_ops(claddr) return join(fmap(terminate, [M.remoteAddress for M in self._conventionMembers.values() if M.remoteAddress != self.myAddress])) def check_convention(self): rmsgs = [] if self._has_been_activated: rmsgs = foldl(lambda x, y: x + y, [self._check_preregistered_ping(member) for member in self._conventionMembers.values()], self._convention_leader_checks() if self.isConventionLeader() or not self.conventionLeaderAddr else self._convention_member_checks()) if self._conventionRegistration.expired(): self._conventionRegistration = ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD) return rmsgs def _convention_leader_checks(self): return foldl(lambda x, y: x + y, [self._missed_checkin_remote_cleanup(R) for R in [ member for member in self._conventionMembers.values() if member.registryValid.expired() ]], []) def _missed_checkin_remote_cleanup(self, remote_member): thesplog('%s missed %d checkins (%s); assuming it has died', str(remote_member), CONVENTION_REGISTRATION_MISS_MAX, str(remote_member.registryValid), level=logging.WARNING, primary=True) return self._remote_system_cleanup(remote_member.remoteAddress) def _convention_member_checks(self): rmsgs = [] # Re-register with the Convention if it's time if self.conventionLeaderAddr and self._conventionRegistration.expired(): if getattr(self, '_conventionLeaderMissCount', 0) >= \ CONVENTION_REGISTRATION_MISS_MAX: thesplog('Admin convention registration lost @ %s (miss %d)', self.conventionLeaderAddr, self._conventionLeaderMissCount, level=logging.WARNING, primary=True) rmsgs.extend(self._remote_system_cleanup(self.conventionLeaderAddr)) self._conventionLeaderMissCount = 0 else: rmsgs.extend(self.setup_convention()) return rmsgs def _check_preregistered_ping(self, member): if member.preRegistered and \ member.preRegistered.pingValid.expired() and \ not member.preRegistered.pingPending: member.preRegistered.pingPending = True # If remote misses a checkin, re-extend the # invitation. This also helps re-initiate a socket # connection if a TxOnly socket has been lost. member.preRegistered.pingValid = ExpirationTimer( convention_reinvite_adjustment( CONVENTION_RESTART_PERIOD if member.registryValid.expired() else CONVENTION_REREGISTRATION_PERIOD)) return [HysteresisSend(member.remoteAddress, ConventionInvite(), onSuccess = self._preRegQueryNotPending, onError = self._preRegQueryNotPending)] return [] def _preRegQueryNotPending(self, result, finishedIntent): remoteAddr = finishedIntent.targetAddr member = self._conventionMembers.find(remoteAddr) if member and member.preRegistered: member.preRegistered.pingPending = False def _remote_system_cleanup(self, registrant): """Called when a RemoteActorSystem has exited and all associated Actors should be marked as exited and the ActorSystem removed from Convention membership. This is also called on a First Time connection from the remote to discard any previous connection information. """ thesplog('Convention cleanup or deregistration for %s (known? %s)', registrant, bool(self._conventionMembers.find(registrant)), level=logging.INFO) rmsgs = [LostRemote(registrant)] cmr = self._conventionMembers.find(registrant) if not cmr or cmr.preRegOnly: return [] # Send exited notification to conventionNotificationHandler (if any) for each in self._conventionNotificationHandlers: rmsgs.append( TransmitIntent(each, ActorSystemConventionUpdate(cmr.remoteAddress, cmr.remoteCapabilities, False))) # errors ignored # If the remote ActorSystem shutdown gracefully (i.e. sent # a Convention Deregistration) then it should not be # necessary to shutdown remote Actors (or notify of their # shutdown) because the remote ActorSystem should already # have caused this to occur. However, it won't hurt, and # it's necessary if the remote ActorSystem did not exit # gracefully. for lpa, raa in cmr.hasRemoteActors: # ignore errors: rmsgs.append(TransmitIntent(lpa, ChildActorExited(raa))) # n.b. at present, this means that the parent might # get duplicate notifications of ChildActorExited; it # is expected that Actors can handle this. # Remove remote system from conventionMembers if not cmr.preRegistered: if registrant == self.conventionLeaderAddr and self._invited: self._conventionAddress = None # Don't clear invited: once invited, that # perpetually indicates this should be only a # member and never a leader. self._conventionMembers.rmv(registrant) else: # This conventionMember needs to stay because the # current system needs to continue issuing # registration pings. By setting the registryValid # expiration to forever, this member won't re-time-out # and will therefore be otherwise ignored... until it # registers again at which point the membership will # be updated with new settings. cmr.registryValid = ExpirationTimer(None) cmr.preRegOnly = True return rmsgs + [HysteresisCancel(registrant)] def sentByRemoteAdmin(self, envelope): for each in self._conventionMembers.values(): if envelope.sender == each.remoteAddress: return True return False def convention_inattention_delay(self): return self._conventionRegistration or \ ExpirationTimer(CONVENTION_REREGISTRATION_PERIOD if self.active_in_convention() or self.isConventionLeader() else CONVENTION_RESTART_PERIOD) def forward_pending_to_remote_system(self, childClass, envelope, sourceHash, acceptsCaps): alreadyTried = getattr(envelope.message, 'alreadyTried', []) remoteCandidates = [ K for K in self._conventionMembers.values() if not K.registryValid.expired() and K.remoteAddress != envelope.sender # source Admin and K.remoteAddress not in alreadyTried and acceptsCaps(K.remoteCapabilities)] if not remoteCandidates: if self.isConventionLeader() or not self.conventionLeaderAddr: raise NoCompatibleSystemForActor( childClass, 'No known ActorSystems can handle a %s for %s', childClass, envelope.message.forActor) # Let the Convention Leader try to find an appropriate ActorSystem bestC = self.conventionLeaderAddr else: # distribute equally amongst candidates C = [(K.remoteAddress, len(K.hasRemoteActors)) for K in remoteCandidates] bestC = foldl(lambda best,possible: best if best[1] <= possible[1] else possible, C)[0] thesplog('Requesting creation of %s%s on remote admin %s', envelope.message.actorClassName, ' (%s)'%sourceHash if sourceHash else '', bestC) if bestC not in alreadyTried: # Don't send request to this remote again, it has already # been tried. This would also be indicated by that system # performing the add of self.myAddress as below, but if # there is disagreement between the local and remote # addresses, this addition will prevent continual # bounceback. alreadyTried.append(bestC) if self.myAddress not in alreadyTried: # Don't send request back to this actor system: it cannot # handle it alreadyTried.append(self.myAddress) envelope.message.alreadyTried = alreadyTried return [TransmitIntent(bestC, envelope.message)] def send_to_all_members(self, message, exception_list=None): return [HysteresisSend(M.remoteAddress, message) for M in self._conventionMembers.values() if M.remoteAddress not in (exception_list or [])] class ConventioneerAdmin(GlobalNamesAdmin): """Extends the AdminCore+GlobalNamesAdmin with ActorSystem Convention functionality to support multi-host configurations. """ def __init__(self, *args, **kw): super(ConventioneerAdmin, self).__init__(*args, **kw) self._cstate = LocalConventionState( self.myAddress, self.capabilities, self._sCBStats, getattr(self.transport, 'getConventionAddress', lambda c: None)) self._hysteresisSender = HysteresisDelaySender(self._send_intent) def _updateStatusResponse(self, resp): self._cstate.updateStatusResponse(resp) super(ConventioneerAdmin, self)._updateStatusResponse(resp) def _activate(self): # Called internally when this ActorSystem has been initialized # and should be activated for operations. super(ConventioneerAdmin, self)._activate() if self.isShuttingDown(): return self._performIO(self._cstate.setup_convention(True)) def h_ConventionInvite(self, envelope): if self.isShuttingDown(): return self._performIO(self._cstate.got_convention_invite(envelope.sender)) return True def h_ConventionRegister(self, envelope): if self.isShuttingDown(): return self._performIO(self._cstate.got_convention_register(envelope.message)) return True def h_ConventionDeRegister(self, envelope): self._performIO(self._cstate.got_convention_deregister(envelope.message)) return True def h_SystemShutdown(self, envelope): self._performIO(self._cstate.got_system_shutdown()) return super(ConventioneerAdmin, self).h_SystemShutdown(envelope) return True def _performIO(self, iolist): for msg in iolist: if isinstance(msg, HysteresisCancel): self._hysteresisSender.cancelSends(msg.cancel_addr) elif isinstance(msg, HysteresisSend): #self._send_intent(msg) self._hysteresisSender.sendWithHysteresis(msg) elif isinstance(msg, LogAggregator): if getattr(self, 'asLogger', None): thesplog('Setting log aggregator of %s to %s', self.asLogger, msg.aggregatorAddress) self._send_intent(TransmitIntent(self.asLogger, msg)) elif isinstance(msg, LostRemote): if hasattr(self.transport, 'lostRemote'): self.transport.lostRemote(msg.lost_addr) else: self._send_intent(msg) def run(self): # Main loop for convention management. Wraps the lower-level # transport with a stop at the next needed convention # registration period to re-register. transport_continue = True try: while not getattr(self, 'shutdown_completed', False) and \ not isinstance(transport_continue, Thespian__Run_Terminated): delay = min(self._cstate.convention_inattention_delay(), ExpirationTimer(None) if self._hysteresisSender.delay.expired() else self._hysteresisSender.delay ) # n.b. delay does not account for soon-to-expire # pingValids, but since delay will not be longer than # a CONVENTION_REREGISTRATION_PERIOD, the worst case # is a doubling of a pingValid period (which should be fine). transport_continue = self.transport.run(self.handleIncoming, delay.remaining()) # Check Convention status based on the elapsed time self._performIO(self._cstate.check_convention()) self._hysteresisSender.checkSends() self._remove_expired_sources() except Exception as ex: import traceback thesplog('ActorAdmin uncaught exception: %s', traceback.format_exc(), level=logging.ERROR, exc_info=True) thesplog('Admin time to die', level=logging.DEBUG) # ---- Source Hash Transfers -------------------------------------------------- def h_SourceHashTransferRequest(self, envelope): sourceHash = envelope.message.sourceHash src = self._sources.get(sourceHash, None) if not src or not src.source_valid: self._send_intent( TransmitIntent(envelope.sender, SourceHashTransferReply(sourceHash))) else: # Older requests did not have the prefer_original field; # maintain backward compatibility orig = getattr(envelope.message, 'prefer_original', False) self._send_intent( TransmitIntent( envelope.sender, SourceHashTransferReply( sourceHash, src.orig_data if orig else src.zipsrc, src.srcInfo, original_form = orig))) return True def h_SourceHashTransferReply(self, envelope): sourceHash = envelope.message.sourceHash if sourceHash not in self._sources: return True if envelope.message.isValid(): # nb.. original_form added; use getattr for backward compatibility if getattr(envelope.message, 'original_form', False): if self._sourceAuthority: self._send_intent( TransmitIntent( self._sourceAuthority, ValidateSource(sourceHash, envelope.message.sourceData, getattr(envelope.message, 'sourceInfo', None)))) return True else: self._loadValidatedActorSource(sourceHash, envelope.message.sourceData, # sourceInfo added; backward compat. getattr(envelope.message, 'sourceInfo', None)) return True self._cancel_pending_actors(self._sources[sourceHash].pending_actors) del self._sources[sourceHash] return True def h_ValidateSource(self, envelope): if not envelope.message.sourceData and \ envelope.sender != self._cstate.conventionLeaderAddr: # Propagate source unload requests to all convention members self._performIO( self._cstate.send_to_all_members( envelope.message, # Do not propagate if this is where the # notification came from; prevents indefinite # bouncing of this message as long as the # convention structure is a DAG. [envelope.sender])) super(ConventioneerAdmin, self).h_ValidateSource(envelope) return False # might have sent with hysteresis, so break out to local _run def _acceptsRemoteLoadedSourcesFrom(self, pendingActorEnvelope): allowed = self.capabilities.get('AllowRemoteActorSources', 'yes') return allowed.lower() == 'yes' or \ (allowed == 'LeaderOnly' and pendingActorEnvelope.sender == self._cstate.conventionLeaderAddr) # ---- Remote Actor interactions ---------------------------------------------- def h_PendingActor(self, envelope): sourceHash = envelope.message.sourceHash childRequirements = envelope.message.targetActorReq thesplog('Pending Actor request received for %s%s reqs %s from %s', envelope.message.actorClassName, ' (%s)'%sourceHash if sourceHash else '', childRequirements, envelope.sender) if sourceHash: if sourceHash not in self._sources: # If this request was forwarded by a remote Admin and the # sourceHash is not known locally, request it from the sending # remote Admin if self._cstate.sentByRemoteAdmin(envelope) and \ self._acceptsRemoteLoadedSourcesFrom(envelope): self._sources[sourceHash] = PendingSource(sourceHash, None) self._sources[sourceHash].pending_actors.append(envelope) self._hysteresisSender.sendWithHysteresis( TransmitIntent( envelope.sender, SourceHashTransferRequest(sourceHash, bool(self._sourceAuthority)))) # sent with hysteresis, so break out to local _run return False if sourceHash in self._sources and \ not self._sources[sourceHash].source_valid: # Still pending, add this create request to the waiting list self._sources[sourceHash].pending_actors.append(envelope) return True # If the requested ActorClass is compatible with this # ActorSystem, attempt to start it, otherwise forward the # request to any known compatible ActorSystem. childClass = envelope.message.actorClassName try: childClass = actualActorClass(envelope.message.actorClassName, partial(loadModuleFromHashSource, sourceHash, self._sources) if sourceHash else None) acceptsCaps = lambda caps: checkActorCapabilities(childClass, caps, childRequirements) if not acceptsCaps(self.capabilities): if envelope.message.forActor is None: # Request from external; use sender address envelope.message.forActor = envelope.sender iolist = self._cstate.forward_pending_to_remote_system( childClass, envelope, sourceHash, acceptsCaps) for each in iolist: # Expected to be only one; if the transmit fails, # route it back here so that the next possible # remote can be tried. each.addCallback(onFailure=self._pending_send_failed) self._performIO(iolist) return True except NoCompatibleSystemForActor as ex: thesplog(str(ex), level=logging.WARNING, primary=True) self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_No_Compatible_ActorSystem) return True except InvalidActorSourceHash: self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_Invalid_SourceHash) return True except InvalidActorSpecification as ex: thesplog('Error: InvalidActorSpecification: %s', str(ex), exc_info=True) self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_Invalid_ActorClass, errorStr=str(ex)) return True except ImportError as ex: self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_Import, errorStr=str(ex)) return True except AttributeError as ex: # Usually when the module has no attribute FooActor thesplog('Error: AttributeError: %s', str(ex), exc_info=True) self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_Invalid_ActorClass, errorStr=str(ex)) return True except Exception as ex: import traceback thesplog('Exception "%s" handling PendingActor: %s', ex, traceback.format_exc(), level=logging.ERROR) self._sendPendingActorResponse( envelope, None, errorCode=PendingActorResponse.ERROR_Invalid_ActorClass, errorStr=str(ex)) return True return super(ConventioneerAdmin, self).h_PendingActor(envelope) def _pending_send_failed(self, result, intent): self.h_PendingActor(ReceiveEnvelope(msg=intent.message, sender=self.myAddress)) def h_NotifyOnSystemRegistration(self, envelope): if envelope.message.enableNotification: self._performIO( self._cstate.add_notification_handler(envelope.sender)) else: self._cstate.remove_notification_handler(envelope.sender) return True def h_PoisonMessage(self, envelope): self._cstate.remove_notification_handler(envelope.sender) def _handleChildExited(self, childAddr): self._cstate.remove_notification_handler(childAddr) return super(ConventioneerAdmin, self)._handleChildExited(childAddr) def h_CapabilityUpdate(self, envelope): msg = envelope.message updateLocals = self._updSystemCapabilities(msg.capabilityName, msg.capabilityValue) if not self.isShuttingDown(): self._performIO( self._cstate.capabilities_have_changed(self.capabilities)) if updateLocals: self._capUpdateLocalActors() return False # might have sent with Hysteresis, so return to _run loop here