Inheritance diagram for opcua.server.history.HistoryStorageInterface:
Public Member Functions | |
| def | new_historized_event (self, source_id, evtypes, period, count=0) |
| def | new_historized_node (self, node_id, period, count=0) |
| def | read_event_history (self, source_id, start, end, nb_values, evfilter) |
| def | read_node_history (self, node_id, start, end, nb_values) |
| def | save_event (self, event) |
| def | save_node_value (self, node_id, datavalue) |
| def | stop (self) |
Detailed Description
Interface of a history backend. Must be implemented by backends
Definition at line 14 of file history.py.
Member Function Documentation
| def opcua.server.history.HistoryStorageInterface.new_historized_event | ( | self, | |
| source_id, | |||
| evtypes, | |||
| period, | |||
count = 0 |
|||
| ) |
Called when historization of events is enabled on server side Returns None
Definition at line 46 of file history.py.
| def opcua.server.history.HistoryStorageInterface.new_historized_node | ( | self, | |
| node_id, | |||
| period, | |||
count = 0 |
|||
| ) |
Called when a new node is to be historized Returns None
Definition at line 21 of file history.py.
| def opcua.server.history.HistoryStorageInterface.read_event_history | ( | self, | |
| source_id, | |||
| start, | |||
| end, | |||
| nb_values, | |||
| evfilter | |||
| ) |
Called when a client make a history read request for events Start time and end time are inclusive Returns a list of Events and a continuation point which is None if all events are read or the ServerTimeStamp of the last rejected event
Definition at line 60 of file history.py.
| def opcua.server.history.HistoryStorageInterface.read_node_history | ( | self, | |
| node_id, | |||
| start, | |||
| end, | |||
| nb_values | |||
| ) |
Called when a client make a history read request for a node if start or end is missing then nb_values is used to limit query nb_values is the max number of values to read. Ignored if 0 Start time and end time are inclusive Returns a list of DataValues and a continuation point which is None if all nodes are read or the ServerTimeStamp of the last rejected DataValue
Definition at line 35 of file history.py.
| def opcua.server.history.HistoryStorageInterface.save_event | ( | self, | |
| event | |||
| ) |
Called when a new event has been generated ans should be saved in history Returns None
Definition at line 53 of file history.py.
| def opcua.server.history.HistoryStorageInterface.save_node_value | ( | self, | |
| node_id, | |||
| datavalue | |||
| ) |
Called when the value of a historized node has changed and should be saved in history Returns None
Definition at line 28 of file history.py.
| def opcua.server.history.HistoryStorageInterface.stop | ( | self | ) |
Called when the server shuts down Can be used to close database connections etc.
Definition at line 69 of file history.py.
The documentation for this class was generated from the following file: