def create_subscription(self, period, handler):
"""
Create a subscription.
returns a Subscription object which allow
to subscribe to events or data on server
handler argument is a class with data_change and/or event methods.
period argument is either a publishing interval in milliseconds or a
CreateSubscriptionParameters instance. The second option should be used,
if the opcua-server has problems with the default options.
These methods will be called when notfication from server are received.
See example-client.py.
Do not do expensive/slow or network operation from these methods
since they are called directly from receiving thread. This is a design choice,
start another thread if you need to do such a thing.
"""
if isinstance(period, ua.CreateSubscriptionParameters):
return Subscription(self.uaclient, period, handler)
params = ua.CreateSubscriptionParameters()
params.RequestedPublishingInterval = period
params.RequestedLifetimeCount = 10000
params.RequestedMaxKeepAliveCount = 3000
params.MaxNotificationsPerPublish = 10000
params.PublishingEnabled = True
params.Priority = 0
return Subscription(self.uaclient, params, handler)
def create_subscription(self):
try:
#if not self._datachange_sub:
params = ua.CreateSubscriptionParameters()
params.RequestedPublishingInterval = self.pub_interval
params.RequestedLifetimeCount = self.lifetime_count
params.RequestedMaxKeepAliveCount = self.max_keep_alive_count
params.MaxNotificationsPerPublish = self.max_notifications_per_publish
params.PublishingEnabled = True
params.Priority = self.priority
sub = Subscription(self.window.client.uaclient, params,
self._subhandler)
self._datachange_sub[sub.subscription_id] = sub
self.model.setHorizontalHeaderLabels(
["Subscription Id", "Publishing Interval"])
row = [
QStandardItem(str(sub.subscription_id)),
QStandardItem(str(sub.parameters.RequestedPublishingInterval))
]
row[0].setData(sub)
self.model.appendRow(row)
except Exception as ex:
self.window.log_window.ui.logTextEdit.append(str(ex))
raise
def create_subscription(self, period, handler):
"""
Create a subscription.
returns a Subscription object which allow
to subscribe to events or data on server
"""
params = ua.CreateSubscriptionParameters()
params.RequestedPublishingInterval = period
params.RequestedLifetimeCount = 3000
params.RequestedMaxKeepAliveCount = 10000
params.MaxNotificationsPerPublish = 0
params.PublishingEnabled = True
params.Priority = 0
return Subscription(self.iserver.isession, params, handler)
def create_subscription(self, period, handler):
"""
Create a subscription.
returns a Subscription object which allow
to subscribe to events or data on server
period is in milliseconds
handler is a python object with following methods:
def datachange_notification(self, node, val, data):
def event_notification(self, event):
def status_change_notification(self, status):
"""
params = ua.CreateSubscriptionParameters()
params.RequestedPublishingInterval = period
params.RequestedLifetimeCount = 3000
params.RequestedMaxKeepAliveCount = 10000
params.MaxNotificationsPerPublish = 0
params.PublishingEnabled = True
params.Priority = 0
return Subscription(self.iserver.isession, params, handler)