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| def | __init__ (self, iserver) |
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| def | dehistorize (self, node) |
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| def | historize_data_change (self, node, period=timedelta(days=7), count=0) |
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| def | historize_event (self, source, period=timedelta(days=7), count=0) |
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| def | read_history (self, params) |
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| def | set_storage (self, storage) |
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| def | stop (self) |
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| def | update_history (self, params) |
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Definition at line 185 of file history.py.
| def opcua.server.history.HistoryManager.__init__ |
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self, |
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iserver |
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| def opcua.server.history.HistoryManager._create_subscription |
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self, |
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handler |
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) |
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private |
| def opcua.server.history.HistoryManager._read_datavalue_history |
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self, |
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rv, |
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details |
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) |
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private |
| def opcua.server.history.HistoryManager._read_event_history |
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self, |
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rv, |
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details |
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) |
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private |
| def opcua.server.history.HistoryManager._read_history |
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self, |
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details, |
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rv |
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private |
determine if the history read is for a data changes or events; then read the history for that node
Definition at line 273 of file history.py.
| def opcua.server.history.HistoryManager.dehistorize |
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self, |
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node |
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Remove subscription to the node/source which is being historized
SQL Implementation
Only the subscriptions is removed. The historical data remains.
Definition at line 247 of file history.py.
| def opcua.server.history.HistoryManager.historize_data_change |
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self, |
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node, |
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period = timedelta(days=7), |
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count = 0 |
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) |
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Subscribe to the nodes' data changes and store the data in the active storage.
Definition at line 209 of file history.py.
| def opcua.server.history.HistoryManager.historize_event |
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self, |
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source, |
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period = timedelta(days=7), |
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count = 0 |
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Subscribe to the source nodes' events and store the data in the active storage.
SQL Implementation
The default is to historize every event type the source generates, custom event properties are included. At
this time there is no way to historize a specific event type. The user software can filter out events which are
not desired when reading.
Note that adding custom events to a source node AFTER historizing has been activated is not supported at this
time (in SQL history there will be no columns in the SQL table for the new event properties). For SQL The table
must be deleted manually so that a new table with the custom event fields can be created.
Definition at line 221 of file history.py.
| def opcua.server.history.HistoryManager.read_history |
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self, |
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params |
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) |
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Read history for a node
This is the part AttributeService, but implemented as its own service
since it requires more logic than other attribute service methods
Definition at line 260 of file history.py.
| def opcua.server.history.HistoryManager.set_storage |
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self, |
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storage |
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set the desired HistoryStorageInterface which History Manager will use for historizing
Definition at line 193 of file history.py.
| def opcua.server.history.HistoryManager.stop |
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self | ) |
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call stop methods of active storage interface whenever the server is stopped
Definition at line 357 of file history.py.
| def opcua.server.history.HistoryManager.update_history |
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self, |
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params |
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) |
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Update history for a node
This is the part AttributeService, but implemented as its own service
since it requires more logic than other attribute service methods
Definition at line 343 of file history.py.
| opcua.server.history.HistoryManager._handlers |
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private |
| opcua.server.history.HistoryManager._sub |
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private |
| opcua.server.history.HistoryManager.iserver |
| opcua.server.history.HistoryManager.logger |
| opcua.server.history.HistoryManager.storage |
The documentation for this class was generated from the following file:
