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from twisted.internet import defer
import channel
from messages import msgTypeName
class CtrlMsgRcvr:
"""Abstract class for things that deal with a control interface to a domain.
"""
def __init__(self):
self.channelFactory = channel.channelFactory()
self.majorTypes = [ ]
self.subTypes = {}
self.dom = None
self.channel = None
self.idx = None
def requestReceived(self, msg, type, subtype):
method = self.subTypes.get(subtype)
if method:
method(msg, 1)
else:
print ('requestReceived> No handler: Message type %s %d:%d'
% (msgTypeName(type, subtype), type, subtype)), self
def responseReceived(self, msg, type, subtype):
method = self.subTypes.get(subtype)
if method:
method(msg, 0)
else:
print ('responseReceived> No handler: Message type %s %d:%d'
% (msgTypeName(type, subtype), type, subtype)), self
def lostChannel(self):
pass
def registerChannel(self):
#print 'CtrlMsgRcvr>registerChannel>', self
self.channel = self.channelFactory.domChannel(self.dom)
self.idx = self.channel.getIndex()
if self.majorTypes:
self.channel.registerDevice(self.majorTypes, self)
def deregisterChannel(self):
#print 'CtrlMsgRcvr>deregisterChannel>', self
if self.channel:
self.channel.deregisterDevice(self)
del self.channel
def produceRequests(self):
return 0
def writeRequest(self, msg):
if self.channel:
self.channel.writeRequest(msg)
else:
print 'CtrlMsgRcvr>writeRequest>', 'no channel!', self
def writeResponse(self, msg):
if self.channel:
self.channel.writeResponse(msg)
else:
print 'CtrlMsgRcvr>writeResponse>', 'no channel!', self
class ControllerFactory(CtrlMsgRcvr):
"""Abstract class for factories creating controllers.
Maintains a table of instances.
"""
def __init__(self):
CtrlMsgRcvr.__init__(self)
self.instances = {}
self.dlist = []
self.dom = 0
# Timeout (in seconds) for deferreds.
self.timeout = 10
def addInstance(self, instance):
self.instances[instance.idx] = instance
def getInstance(self, idx):
return self.instances.get(idx)
def getInstances(self):
return self.instances.values()
def getInstanceByDom(self, dom):
for inst in self.instances.values():
if inst.dom == dom:
return inst
return None
def delInstance(self, instance):
#print 'ControllerFactory>delInstance>', instance.idx
if instance.idx in self.instances:
#print 'ControllerFactory>delInstance> remove', instance.idx
del self.instances[instance.idx]
def createInstance(self, dom, recreate=0):
raise NotImplementedError()
def instanceClosed(self, instance):
#print 'ControllerFactory>instanceClosed>', instance.idx, instance
self.delInstance(instance)
def addDeferred(self):
d = defer.Deferred()
if self.timeout > 0:
# The deferred will error if not called before timeout.
d.setTimeout(self.timeout)
self.dlist.append(d)
return d
def callDeferred(self, *args):
if self.dlist:
d = self.dlist.pop(0)
d.callback(*args)
def errDeferred(self, *args):
if self.dlist:
d = self.dlist.pop(0)
d.errback(*args)
class Controller(CtrlMsgRcvr):
"""Abstract class for a device controller attached to a domain.
"""
def __init__(self, factory, dom):
CtrlMsgRcvr.__init__(self)
self.factory = factory
self.dom = int(dom)
self.channel = None
self.idx = None
def close(self):
self.deregisterChannel()
self.lostChannel()
def lostChannel(self):
#print 'Controller>lostChannel>', self, self.factory
self.factory.instanceClosed(self)
class Dev:
def __init__(self, controller):
self.controller = controller
self.props = {}
def setprop(self, k, v):
self.props[k] = v
def getprop(self, k, v=None):
return self.props.get(k, v)
def hasprop(self, k):
return k in self.props
def delprop(self, k):
if k in self.props:
del self.props[k]
#def __repr__(self):
# return str(self.sxpr())
def sxpr(self):
raise NotImplementedError()
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