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Code Issues Releases Wiki Activity

restore do_SubscribeCOVRequest

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Joel Bender 2021-07-27 01:33:20 -04:00
parent 967782c320
commit 5e238a0271
1 changed files with 77 additions and 0 deletions
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77
py34/bacpypes/service/cov.py
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@ -680,6 +680,83 @@ class ChangeOfValueServices(Capability):
### delete the rest of the pending requests for this client
def do_SubscribeCOVRequest(self, apdu):
if _debug: ChangeOfValueServices._debug("do_SubscribeCOVRequest %r", apdu)
# extract the pieces
client_addr = apdu.pduSource
proc_id = apdu.subscriberProcessIdentifier
obj_id = apdu.monitoredObjectIdentifier
confirmed = apdu.issueConfirmedNotifications
lifetime = apdu.lifetime
# request is to cancel the subscription
cancel_subscription = (confirmed is None) and (lifetime is None)
# find the object
obj = self.get_object_id(obj_id)
if _debug: ChangeOfValueServices._debug(" - object: %r", obj)
if not obj:
raise ExecutionError(errorClass='object', errorCode='unknownObject')
# check to see if the object supports COV
if not obj._object_supports_cov:
raise ExecutionError(errorClass='services', errorCode='covSubscriptionFailed')
# look for an algorithm already associated with this object
cov_detection = self.cov_detections.get(obj, None)
# if there isn't one, make one and associate it with the object
if not cov_detection:
# look for an associated class and if it's not there it's not supported
criteria_class = criteria_type_map.get(obj_id[0], None)
if not criteria_class:
raise ExecutionError(errorClass='services', errorCode='covSubscriptionFailed')
# make one of these and bind it to the object
cov_detection = criteria_class(obj)
# keep track of it for other subscriptions
self.cov_detections[obj] = cov_detection
if _debug: ChangeOfValueServices._debug(" - cov_detection: %r", cov_detection)
# can a match be found?
cov = cov_detection.cov_subscriptions.find(client_addr, proc_id, obj_id)
if _debug: ChangeOfValueServices._debug(" - cov: %r", cov)
# if a match was found, update the subscription
if cov:
if cancel_subscription:
if _debug: ChangeOfValueServices._debug(" - cancel the subscription")
self.cancel_subscription(cov)
else:
if _debug: ChangeOfValueServices._debug(" - renew the subscription")
cov.renew_subscription(lifetime)
else:
if cancel_subscription:
if _debug: ChangeOfValueServices._debug(" - cancel a subscription that doesn't exist")
else:
if _debug: ChangeOfValueServices._debug(" - create a subscription")
# make a subscription
cov = Subscription(obj, client_addr, proc_id, obj_id, confirmed, lifetime, None)
if _debug: ChangeOfValueServices._debug(" - cov: %r", cov)
# add it to our subscriptions lists
self.add_subscription(cov)
# success
response = SimpleAckPDU(context=apdu)
# return the result
self.response(response)
# if the subscription is not being canceled, it is new or renewed,
# so send it a notification when you get a chance.
if not cancel_subscription:
if _debug: ChangeOfValueServices._debug(" - send a notification")
deferred(cov_detection.send_cov_notifications, cov)
def do_SubscribeCOVPropertyRequest(self, apdu):
if _debug: ChangeOfValueServices._debug("do_SubscribeCOVPropertyRequest %r", apdu)