Server.get_event_generator() - Code Metrics - Inspection of "Events implementation proposal" - FreeOpcUa/python-opcua - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#161)

by Denis

created 2016-04-27 12:29 UTC

Server.get_event_generator() A

↳ Parent: Project

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	2.1481

Metric	Value
cc	2
dl	0
loc	8
ccs	2
cts	3
cp	0.6667
crap	2.1481
rs	9.4285

"""
High level interface to pure python OPC-UA server
"""

import logging
try:
    from urllib.parse import urlparse
except ImportError:
    from urlparse import urlparse


from opcua import ua
#from opcua.binary_server import BinaryServer
from opcua.server.binary_server_asyncio import BinaryServer
from opcua.server.internal_server import InternalServer
from opcua.common.node import Node
from opcua.common.event import EventGenerator
from opcua.common.subscription import Subscription
from opcua.common import xmlimporter
from opcua.common.manage_nodes import delete_nodes
from opcua.client.client import Client
from opcua.crypto import security_policies
use_crypto = True
try:
    from opcua.crypto import uacrypto
except ImportError:
    print("cryptography is not installed, use of crypto disabled")
    use_crypto = False


class Server(object):

    """
    High level Server class

    This class creates an opcua server with default values

    Create your own namespace and then populate your server address space
    using use the get_root() or get_objects() to get Node objects.
    and get_event_object() to fire events.
    Then start server. See example_server.py
    All methods are threadsafe

    If you need more flexibility you call directly the Ua Service methods
    on the iserver  or iserver.isesssion object members.


    :ivar application_uri:
    :vartype application_uri: uri
    :ivar product_uri:
    :vartype product_uri: uri
    :ivar name:
    :vartype name: string
    :ivar default_timeout: timout in milliseconds for sessions and secure channel
    :vartype default_timeout: int
    :ivar iserver: internal server object
    :vartype default_timeout: InternalServer
    :ivar bserver: binary protocol server
    :vartype bserver: BinaryServer

    """

    def __init__(self):
        self.logger = logging.getLogger(__name__)
        self.endpoint = urlparse("opc.tcp://0.0.0.0:4840/freeopcua/server/")
        self.application_uri = "urn:freeopcua:python:server"
        self.product_uri = "urn:freeopcua.github.no:python:server"
        self.name = "FreeOpcUa Python Server"
        self.application_type = ua.ApplicationType.ClientAndServer
        self.default_timeout = 3600000
        self.iserver = InternalServer()
        self.bserver = None
        self._discovery_clients = {}
        self._discovery_period = 60
        self.certificate = None
        self.private_key = None
        self._policies = []

        # setup some expected values
        self.register_namespace(self.application_uri)
        sa_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerArray))
        sa_node.set_value([self.application_uri])

    def __enter__(self):
        self.start()
        return self

    def __exit__(self):
        self.stop()

    def load_certificate(self, path):
        """
        load server certificate from file, either pem or der
        """
        self.certificate = uacrypto.load_certificate(path)

    def load_private_key(self, path):
        self.private_key = uacrypto.load_private_key(path)

    def disable_clock(self, val=True):
        """
        for debugging you may want to disable clock that write every second
        to address space
        """
        self.iserver.disabled_clock = val

    def set_application_uri(self, uri):
        """
        Set application/server URI.
        This uri is supposed to be unique. If you intent to register
        your server to a discovery server, it really should be unique in
        your system!
        default is : "urn:freeopcua:python:server"
        """
        self.application_uri = uri

    def find_servers(self, uris=None):
        """
        find_servers. mainly implemented for simmetry with client
        """
        if uris is None:
            uris = []
        params = ua.FindServersParameters()
        params.EndpointUrl = self.endpoint.geturl()
        params.ServerUris = uris
        return self.iserver.find_servers(params)

    def register_to_discovery(self, url="opc.tcp://localhost:4840", period=60):
        """
        Register to an OPC-UA Discovery server. Registering must be renewed at
        least every 10 minutes, so this method will use our asyncio thread to
        re-register every period seconds
        if period is 0 registration is not automatically renewed
        """
        # FIXME: habe a period per discovery
        if url in self._discovery_clients:
            self._discovery_clients[url].disconnect()
        self._discovery_clients[url] = Client(url)
        self._discovery_clients[url].connect()
        self._discovery_clients[url].register_server(self)
        self._discovery_period = period
        if period:
            self.iserver.loop.call_soon(self._renew_registration)

    def unregister_to_discovery(self, url="opc.tcp://localhost:4840"):
        """
        stop registration thread
        """
        # FIXME: is there really no way to deregister?
        self._discovery_clients[url].disconnect()

    def _renew_registration(self):
        for client in self._discovery_clients.values():
            client.register_server(self)
            self.iserver.loop.call_later(self._discovery_period, self._renew_registration)

    def get_client_to_discovery(self, url="opc.tcp://localhost:4840"):
        """
        Create a client to discovery server and return it
        """
        client = Client(url)
        client.connect()
        return client

    def allow_remote_admin(self, allow):
        """
        Enable or disable the builtin Admin user from network clients
        """
        self.iserver.allow_remote_admin = allow

    def set_endpoint(self, url):
        self.endpoint = urlparse(url)

    def get_endpoints(self):
        return self.iserver.get_endpoints()

    def _setup_server_nodes(self):
        # to be called just before starting server since it needs all parameters to be setup
        self._set_endpoints()
        self._policies = [ua.SecurityPolicyFactory()]
        if self.certificate and self.private_key:
            self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15,
                                ua.MessageSecurityMode.SignAndEncrypt)
            self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15,
                                                           ua.MessageSecurityMode.SignAndEncrypt,
                                                           self.certificate,
                                                           self.private_key)
                                 )
            self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15,
                                ua.MessageSecurityMode.Sign)
            self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15,
                                                           ua.MessageSecurityMode.Sign,
                                                           self.certificate,
                                                           self.private_key)
                                 )
            self._set_endpoints(security_policies.SecurityPolicyBasic256,
                                ua.MessageSecurityMode.SignAndEncrypt)
            self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256,
                                                           ua.MessageSecurityMode.SignAndEncrypt,
                                                           self.certificate,
                                                           self.private_key)
                                 )
            self._set_endpoints(security_policies.SecurityPolicyBasic256,
                                ua.MessageSecurityMode.Sign)
            self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256,
                                                           ua.MessageSecurityMode.Sign,
                                                           self.certificate,
                                                           self.private_key)
                                 )

    def _set_endpoints(self, policy=ua.SecurityPolicy, mode=ua.MessageSecurityMode.None_):
        idtoken = ua.UserTokenPolicy()
        idtoken.PolicyId = 'anonymous'
        idtoken.TokenType = ua.UserTokenType.Anonymous

        idtoken2 = ua.UserTokenPolicy()
        idtoken2.PolicyId = 'certificate_basic256'
        idtoken2.TokenType = ua.UserTokenType.Certificate

        idtoken3 = ua.UserTokenPolicy()
        idtoken3.PolicyId = 'certificate_basic128'
        idtoken3.TokenType = ua.UserTokenType.Certificate

        idtoken4 = ua.UserTokenPolicy()
        idtoken4.PolicyId = 'username'
        idtoken4.TokenType = ua.UserTokenType.UserName

        appdesc = ua.ApplicationDescription()
        appdesc.ApplicationName = ua.LocalizedText(self.name)
        appdesc.ApplicationUri = self.application_uri
        appdesc.ApplicationType = self.application_type
        appdesc.ProductUri = self.product_uri
        appdesc.DiscoveryUrls.append(self.endpoint.geturl())

        edp = ua.EndpointDescription()
        edp.EndpointUrl = self.endpoint.geturl()
        edp.Server = appdesc
        if self.certificate:
            edp.ServerCertificate = uacrypto.der_from_x509(self.certificate)
        edp.SecurityMode = mode
        edp.SecurityPolicyUri = policy.URI
        edp.UserIdentityTokens = [idtoken, idtoken2, idtoken3, idtoken4]
        edp.TransportProfileUri = 'http://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary'
        edp.SecurityLevel = 0
        self.iserver.add_endpoint(edp)

    def set_server_name(self, name):
        self.name = name

    def start(self):
        """
        Start to listen on network
        """
        self._setup_server_nodes()
        self.iserver.start()
        self.bserver = BinaryServer(self.iserver, self.endpoint.hostname, self.endpoint.port)
        self.bserver.set_policies(self._policies)
        self.bserver.start()

    def stop(self):
        """
        Stop server
        """
        for client in self._discovery_clients.values():
            client.disconnect()
        self.bserver.stop()
        self.iserver.stop()

    def get_root_node(self):
        """
        Get Root node of server. Returns a Node object.
        """
        return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.RootFolder))

    def get_objects_node(self):
        """
        Get Objects node of server. Returns a Node object.
        """
        return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.ObjectsFolder))

    def get_server_node(self):
        """
        Get Server node of server. Returns a Node object.
        """
        return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.Server))

    def get_node(self, nodeid):
        """
        Get a specific node using NodeId object or a string representing a NodeId
        """
        return Node(self.iserver.isession, nodeid)

    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 get_namespace_array(self):
        """
        get all namespace defined in server
        """
        ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray))
        return ns_node.get_value()

    def register_namespace(self, uri):
        """
        Register a new namespace. Nodes should in custom namespace, not 0.
        """
        ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray))
        uries = ns_node.get_value()
        uries.append(uri)
        ns_node.set_value(uries)
        return len(uries) - 1

    def get_namespace_index(self, uri):
        """
        get index of a namespace using its uri
        """
        uries = self.get_namespace_array()
        return uries.index(uri)

    def get_event_generator(self, etype=None, source=ua.ObjectIds.Server):
        """
        Returns an event object using an event type from address space.
        Use this object to fire events
        """
        if not etype:
            etype = ua.BaseEvent()
        return EventGenerator(self.iserver.isession, etype, source)

    def create_custom_event_type(self, idx, name, baseetype=ua.ObjectIds.BaseEventType, properties=[]):

        if isinstance(baseetype, Node):
            base_event = baseetype
        elif isinstance(baseetype, ua.NodeId):
            base_event = Node(self.iserver.isession, baseetype)
        else:
            base_event = Node(self.iserver.isession, ua.NodeId(baseetype))

        custom_event = base_event.add_subtype(idx, name)
        for property in properties:
            custom_event.add_property(idx, property[0], ua.Variant(None, property[1]))

        return custom_event

    def import_xml(self, path):
        """
        import nodes defined in xml
        """
        importer = xmlimporter.XmlImporter(self.iserver.node_mgt_service)
        importer.import_xml(path)

    def delete_nodes(self, nodes, recursive=False):
        return delete_nodes(self.iserver.isession, nodes, recursive)

    def historize_node(self, node):
        self.iserver.enable_history(node)

    def dehistorize_node(self, node):
        self.iserver.disable_history(node)


1		"""
2		High level interface to pure python OPC-UA server
3		"""
4
5	1	import logging
6	1	try:
7	1	from urllib.parse import urlparse
8		except ImportError:
9		from urlparse import urlparse
10
11
12	1	from opcua import ua
13		#from opcua.binary_server import BinaryServer
14	1	from opcua.server.binary_server_asyncio import BinaryServer
15	1	from opcua.server.internal_server import InternalServer
16	1	from opcua.common.node import Node
17	1	from opcua.common.event import EventGenerator
18	1	from opcua.common.subscription import Subscription
19	1	from opcua.common import xmlimporter
20	1	from opcua.common.manage_nodes import delete_nodes
21	1	from opcua.client.client import Client
22	1	from opcua.crypto import security_policies
23	1	use_crypto = True
24	1	try:
25	1	from opcua.crypto import uacrypto
26	1	except ImportError:
27	1	print("cryptography is not installed, use of crypto disabled")
28	1	use_crypto = False
29
30
31	1	class Server(object):
32
33		"""
34		High level Server class
35
36		This class creates an opcua server with default values
37
38		Create your own namespace and then populate your server address space
39		using use the get_root() or get_objects() to get Node objects.
40		and get_event_object() to fire events.
41		Then start server. See example_server.py
42		All methods are threadsafe
43
44		If you need more flexibility you call directly the Ua Service methods
45		on the iserver or iserver.isesssion object members.
46
47
48		:ivar application_uri:
49		:vartype application_uri: uri
50		:ivar product_uri:
51		:vartype product_uri: uri
52		:ivar name:
53		:vartype name: string
54		:ivar default_timeout: timout in milliseconds for sessions and secure channel
55		:vartype default_timeout: int
56		:ivar iserver: internal server object
57		:vartype default_timeout: InternalServer
58		:ivar bserver: binary protocol server
59		:vartype bserver: BinaryServer
60
61		"""
62
63	1	def __init__(self):
64	1	self.logger = logging.getLogger(__name__)
65	1	self.endpoint = urlparse("opc.tcp://0.0.0.0:4840/freeopcua/server/")
66	1	self.application_uri = "urn:freeopcua:python:server"
67	1	self.product_uri = "urn:freeopcua.github.no:python:server"
68	1	self.name = "FreeOpcUa Python Server"
69	1	self.application_type = ua.ApplicationType.ClientAndServer
70	1	self.default_timeout = 3600000
71	1	self.iserver = InternalServer()
72	1	self.bserver = None
73	1	self._discovery_clients = {}
74	1	self._discovery_period = 60
75	1	self.certificate = None
76	1	self.private_key = None
77	1	self._policies = []
78
79		# setup some expected values
80	1	self.register_namespace(self.application_uri)
81	1	sa_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_ServerArray))
82	1	sa_node.set_value([self.application_uri])
83
84	1	def __enter__(self):
85		self.start()
86		return self
87
88	1	def __exit__(self):
89		self.stop()
90
91	1	def load_certificate(self, path):
92		"""
93		load server certificate from file, either pem or der
94		"""
95		self.certificate = uacrypto.load_certificate(path)
96
97	1	def load_private_key(self, path):
98		self.private_key = uacrypto.load_private_key(path)
99
100	1	def disable_clock(self, val=True):
101		"""
102		for debugging you may want to disable clock that write every second
103		to address space
104		"""
105		self.iserver.disabled_clock = val
106
107	1	def set_application_uri(self, uri):
108		"""
109		Set application/server URI.
110		This uri is supposed to be unique. If you intent to register
111		your server to a discovery server, it really should be unique in
112		your system!
113		default is : "urn:freeopcua:python:server"
114		"""
115	1	self.application_uri = uri
116
117	1	def find_servers(self, uris=None):
118		"""
119		find_servers. mainly implemented for simmetry with client
120		"""
121	1	if uris is None:
122	1	uris = []
123	1	params = ua.FindServersParameters()
124	1	params.EndpointUrl = self.endpoint.geturl()
125	1	params.ServerUris = uris
126	1	return self.iserver.find_servers(params)
127
128	1	def register_to_discovery(self, url="opc.tcp://localhost:4840", period=60):
129		"""
130		Register to an OPC-UA Discovery server. Registering must be renewed at
131		least every 10 minutes, so this method will use our asyncio thread to
132		re-register every period seconds
133		if period is 0 registration is not automatically renewed
134		"""
135		# FIXME: habe a period per discovery
136	1	if url in self._discovery_clients:
137	1	self._discovery_clients[url].disconnect()
138	1	self._discovery_clients[url] = Client(url)
139	1	self._discovery_clients[url].connect()
140	1	self._discovery_clients[url].register_server(self)
141	1	self._discovery_period = period
142	1	if period:
143		self.iserver.loop.call_soon(self._renew_registration)
144
145	1	def unregister_to_discovery(self, url="opc.tcp://localhost:4840"):
146		"""
147		stop registration thread
148		"""
149		# FIXME: is there really no way to deregister?
150		self._discovery_clients[url].disconnect()
151
152	1	def _renew_registration(self):
153		for client in self._discovery_clients.values():
154		client.register_server(self)
155		self.iserver.loop.call_later(self._discovery_period, self._renew_registration)
156
157	1	def get_client_to_discovery(self, url="opc.tcp://localhost:4840"):
158		"""
159		Create a client to discovery server and return it
160		"""
161		client = Client(url)
162		client.connect()
163		return client
164
165	1	def allow_remote_admin(self, allow):
166		"""
167		Enable or disable the builtin Admin user from network clients
168		"""
169		self.iserver.allow_remote_admin = allow
170
171	1	def set_endpoint(self, url):
172	1	self.endpoint = urlparse(url)
173
174	1	def get_endpoints(self):
175	1	return self.iserver.get_endpoints()
176
177	1	def _setup_server_nodes(self):
178		# to be called just before starting server since it needs all parameters to be setup
179	1	self._set_endpoints()
180	1	self._policies = [ua.SecurityPolicyFactory()]
181	1	if self.certificate and self.private_key:
182		self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15,
183		ua.MessageSecurityMode.SignAndEncrypt)
184		self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15,
185		ua.MessageSecurityMode.SignAndEncrypt,
186		self.certificate,
187		self.private_key)
188		)
189		self._set_endpoints(security_policies.SecurityPolicyBasic128Rsa15,
190		ua.MessageSecurityMode.Sign)
191		self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic128Rsa15,
192		ua.MessageSecurityMode.Sign,
193		self.certificate,
194		self.private_key)
195		)
196		self._set_endpoints(security_policies.SecurityPolicyBasic256,
197		ua.MessageSecurityMode.SignAndEncrypt)
198		self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256,
199		ua.MessageSecurityMode.SignAndEncrypt,
200		self.certificate,
201		self.private_key)
202		)
203		self._set_endpoints(security_policies.SecurityPolicyBasic256,
204		ua.MessageSecurityMode.Sign)
205		self._policies.append(ua.SecurityPolicyFactory(security_policies.SecurityPolicyBasic256,
206		ua.MessageSecurityMode.Sign,
207		self.certificate,
208		self.private_key)
209		)
210
211	1	def _set_endpoints(self, policy=ua.SecurityPolicy, mode=ua.MessageSecurityMode.None_):
212	1	idtoken = ua.UserTokenPolicy()
213	1	idtoken.PolicyId = 'anonymous'
214	1	idtoken.TokenType = ua.UserTokenType.Anonymous
215
216	1	idtoken2 = ua.UserTokenPolicy()
217	1	idtoken2.PolicyId = 'certificate_basic256'
218	1	idtoken2.TokenType = ua.UserTokenType.Certificate
219
220	1	idtoken3 = ua.UserTokenPolicy()
221	1	idtoken3.PolicyId = 'certificate_basic128'
222	1	idtoken3.TokenType = ua.UserTokenType.Certificate
223
224	1	idtoken4 = ua.UserTokenPolicy()
225	1	idtoken4.PolicyId = 'username'
226	1	idtoken4.TokenType = ua.UserTokenType.UserName
227
228	1	appdesc = ua.ApplicationDescription()
229	1	appdesc.ApplicationName = ua.LocalizedText(self.name)
230	1	appdesc.ApplicationUri = self.application_uri
231	1	appdesc.ApplicationType = self.application_type
232	1	appdesc.ProductUri = self.product_uri
233	1	appdesc.DiscoveryUrls.append(self.endpoint.geturl())
234
235	1	edp = ua.EndpointDescription()
236	1	edp.EndpointUrl = self.endpoint.geturl()
237	1	edp.Server = appdesc
238	1	if self.certificate:
239		edp.ServerCertificate = uacrypto.der_from_x509(self.certificate)
240	1	edp.SecurityMode = mode
241	1	edp.SecurityPolicyUri = policy.URI
242	1	edp.UserIdentityTokens = [idtoken, idtoken2, idtoken3, idtoken4]
243	1	edp.TransportProfileUri = 'http://opcfoundation.org/UA-Profile/Transport/uatcp-uasc-uabinary'
244	1	edp.SecurityLevel = 0
245	1	self.iserver.add_endpoint(edp)
246
247	1	def set_server_name(self, name):
248		self.name = name
249
250	1	def start(self):
251		"""
252		Start to listen on network
253		"""
254	1	self._setup_server_nodes()
255	1	self.iserver.start()
256	1	self.bserver = BinaryServer(self.iserver, self.endpoint.hostname, self.endpoint.port)
257	1	self.bserver.set_policies(self._policies)
258	1	self.bserver.start()
259
260	1	def stop(self):
261		"""
262		Stop server
263		"""
264	1	for client in self._discovery_clients.values():
265	1	client.disconnect()
266	1	self.bserver.stop()
267	1	self.iserver.stop()
268
269	1	def get_root_node(self):
270		"""
271		Get Root node of server. Returns a Node object.
272		"""
273	1	return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.RootFolder))
274
275	1	def get_objects_node(self):
276		"""
277		Get Objects node of server. Returns a Node object.
278		"""
279	1	return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.ObjectsFolder))
280
281	1	def get_server_node(self):
282		"""
283		Get Server node of server. Returns a Node object.
284		"""
285	1	return self.get_node(ua.TwoByteNodeId(ua.ObjectIds.Server))
286
287	1	def get_node(self, nodeid):
288		"""
289		Get a specific node using NodeId object or a string representing a NodeId
290		"""
291	1	return Node(self.iserver.isession, nodeid)
292
293	1	def create_subscription(self, period, handler):
294		"""
295		Create a subscription.
296		returns a Subscription object which allow
297		to subscribe to events or data on server
298		"""
299	1	params = ua.CreateSubscriptionParameters()
300	1	params.RequestedPublishingInterval = period
301	1	params.RequestedLifetimeCount = 3000
302	1	params.RequestedMaxKeepAliveCount = 10000
303	1	params.MaxNotificationsPerPublish = 0
304	1	params.PublishingEnabled = True
305	1	params.Priority = 0
306	1	return Subscription(self.iserver.isession, params, handler)
307
308	1	def get_namespace_array(self):
309		"""
310		get all namespace defined in server
311		"""
312	1	ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray))
313	1	return ns_node.get_value()
314
315	1	def register_namespace(self, uri):
316		"""
317		Register a new namespace. Nodes should in custom namespace, not 0.
318		"""
319	1	ns_node = self.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray))
320	1	uries = ns_node.get_value()
321	1	uries.append(uri)
322	1	ns_node.set_value(uries)
323	1	return len(uries) - 1
324
325	1	def get_namespace_index(self, uri):
326		"""
327		get index of a namespace using its uri
328		"""
329	1	uries = self.get_namespace_array()
330	1	return uries.index(uri)
331
332	1	def get_event_generator(self, etype=None, source=ua.ObjectIds.Server):
333		"""
334		Returns an event object using an event type from address space.
335		Use this object to fire events
336		"""
337		if not etype:
338		etype = ua.BaseEvent()
339	1	return EventGenerator(self.iserver.isession, etype, source)
340
341		def create_custom_event_type(self, idx, name, baseetype=ua.ObjectIds.BaseEventType, properties=[]):
342
343	1	if isinstance(baseetype, Node):
344	1	base_event = baseetype
345		elif isinstance(baseetype, ua.NodeId):
346	1	base_event = Node(self.iserver.isession, baseetype)
347	1	else:
348		base_event = Node(self.iserver.isession, ua.NodeId(baseetype))
349	1
350		custom_event = base_event.add_subtype(idx, name)
351		for property in properties:
352	1	custom_event.add_property(idx, property[0], ua.Variant(None, property[1]))
353
354		return custom_event
355
356		def import_xml(self, path):
357		"""
358		import nodes defined in xml
359		"""
360		importer = xmlimporter.XmlImporter(self.iserver.node_mgt_service)
361		importer.import_xml(path)
362
363		def delete_nodes(self, nodes, recursive=False):
364		return delete_nodes(self.iserver.isession, nodes, recursive)
365
366		def historize_node(self, node):
367		self.iserver.enable_history(node)
368
369		def dehistorize_node(self, node):
370		self.iserver.disable_history(node)
371

FreeOpcUa / python-opcua

Pull Request — master (#161)

Server.get_event_generator() A

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