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import time |
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import logging |
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from threading import Thread |
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4
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from PyQt5.QtCore import QSettings |
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6
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from opcua import ua |
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from opcua import Server |
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from opcua import Client |
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from opcua.common.xmlexporter import XmlExporter |
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logger = logging.getLogger(__name__) |
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OPENUA = True |
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try: |
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import openua |
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except ImportError as ex: |
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logger.info("Could not import open62541 python wrapper: %s ", ex) |
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OPENUA = False |
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class ServerManager(object): |
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def __init__(self, action): |
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self._backend = ServerPython() |
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self._action = action |
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self._settings = QSettings() |
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if OPENUA: |
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use_openua = int(self._settings.value("use_openua_server", 0)) |
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logger.info("Using open62541: %s", openua) |
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self._action.setChecked(use_openua) |
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self._action.toggled.connect(self._toggle_use_openua) |
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self._toggle_use_openua(use_openua) # init state |
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else: |
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logger.info("Open62541 python wrappers not available, disabling action") |
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self._action.setChecked(False) |
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self._action.setEnabled(False) |
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def close(self): |
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if OPENUA: |
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self._settings.setValue("use_openua_server", int(self._action.isChecked())) |
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self.stop_server() |
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def _toggle_use_openua(self, val): |
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print("SET SERVER", val) |
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if val: |
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print("use C") |
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self._backend = ServerC() |
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else: |
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self._backend = ServerPython() |
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@property |
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def nodes(self): |
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return self._backend.nodes |
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def get_node(self, node): |
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return self._backend.get_node(node) |
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def get_namespace_array(self): |
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return self._backend.get_namespace_array() |
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def start_server(self, endpoint): |
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self._action.setEnabled(False) |
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self._backend.start_server(endpoint) |
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def stop_server(self): |
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self._backend.stop_server() |
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self._action.setEnabled(True) |
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def import_xml(self, path): |
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return self._backend.import_xml(path) |
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def export_xml(self, nodes, uris, path): |
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return self._backend.export_xml(nodes, uris, path) |
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class ServerPython(object): |
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def __init__(self): |
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self._server = None |
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self.nodes = None |
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self.get_node = None |
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self.get_namespace_array = None |
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85
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def start_server(self, endpoint): |
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self._server = Server() |
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self._server.set_endpoint(endpoint) |
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self._server.set_server_name("OpcUa Modeler Server") |
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self.nodes = self._server.nodes |
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self.get_node = self._server.get_node |
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self.get_namespace_array = self._server.get_namespace_array |
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# now remove freeopcua namespace, not necessary when modeling and |
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# ensures correct idx for exported nodesets |
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ns_node = self._server.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
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nss = ns_node.get_value() |
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ns_node.set_value(nss[1:]) |
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self._server.start() |
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def stop_server(self): |
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if self._server is not None: |
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self._server.stop() |
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self._server = None |
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104
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def import_xml(self, path): |
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return self._server.import_xml(path) |
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107
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def export_xml(self, nodes, uris, path): |
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exp = XmlExporter(self._server) |
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exp.build_etree(nodes, uris=uris) |
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exp.write_xml(path) |
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112
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113
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class UAServer(Thread): |
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def __init__(self): |
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Thread.__init__(self) |
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self.server = openua.Server() |
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self.status = None |
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self.endpoint = None |
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120
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def run(self): |
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print("start server") |
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self.status = self.server.run(self.endpoint) |
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print("server stopped") |
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125
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def stop(self): |
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print("trying to stop server") |
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self.server.stop() |
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128
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129
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130
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class ServerC(object): |
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def __init__(self): |
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self._server = None |
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133
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self._client = None |
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134
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self.nodes = None |
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135
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self.get_node = None |
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self.get_namespace_array = None |
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138
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def start_server(self, endpoint): |
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self._server = UAServer() |
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self._server.endpoint = 48400 # enpoint not supported yet |
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#self._server.endpoint = endpoint |
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self._server.start() |
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#self._server.set_server_name("OpcUa Modeler Server") |
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time.sleep(0.2) |
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self._client = Client(endpoint) |
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self._client.connect() |
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147
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148
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self.nodes = self._client.nodes |
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149
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self.get_node = self._client.get_node |
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150
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self.get_namespace_array = self._client.get_namespace_array |
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151
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# now remove freeopcua namespace, not necessary when modeling and |
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152
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# ensures correct idx for exported nodesets |
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153
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ns_node = self._client.get_node(ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
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nss = ns_node.get_value() |
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#ns_node.set_value(nss[1:]) |
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156
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157
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def stop_server(self): |
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if self._server is not None: |
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self._client.disconnect() |
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160
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self._client = None |
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161
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self._server.stop() |
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162
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time.sleep(0.2) |
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self._server = None |
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164
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165
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def import_xml(self, path): |
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return self._client.import_xml(path) |
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167
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168
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def export_xml(self, nodes, uris, path): |
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169
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exp = XmlExporter(self._client) |
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170
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exp.build_etree(nodes, uris=uris) |
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exp.write_xml(path) |
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172
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173
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FreeOpcUa /
opcua-modeler
