Hello,
thank for your reply.

I saw in the example code supplied with the SDK that the logging is done in a variable. What should I do or what should I change so that I can easily store the history in a database?

Thnaks

Hi,
thank for your reply.

I also want to historicize a varibale that I load from an xml model, then save and read the values from a varibale in memory. Basically to do as in the prosys example but not create the variable in the code but rather load it via an xml model. Can you help me please ?

Thanks

I used this instruction ‘UaServer.getAddressSpace().getNode(nodeId)’ to get the node. And then, I used ‘MyHistorian.addVariableHistory(v);’ from example code supplied with the SDK.
When I browse the OPC UA tree with an OPC UA client, I see that logging is enabled on the node but when I try to read the log values I get the message : “No history values received for node ‘NS6|Numeric|6016’ “.

The node I create with the code:
“
UaVariableNode historised;
….
final NodeId historisedTypeId = new NodeId(this.getNamespaceIndex(), “HistorisedType”);
UaType historisedType = this.addType(historisedTypeId, “HistorisedType”, baseDataVariableType);
final NodeId historisedId = new NodeId(this.getNamespaceIndex(), “Historised”);
UaDataType historisedDoubleType = getServer().getNodeManagerRoot().getDataType(DataTypeIdentifiers.Double);
historised = new CacheVariable(this, historisedId, “Historised”, LocalizedText.NO_LOCALE);
historised.setDataType(historisedDoubleType);
historised.setTypeDefinition(historisedType);
this.getServer().getNodeManagerRoot().getObjectsFolder().addComponent(historised);
“
I add the node ‘historised’ in history by using : ‘MyHistorian.addVariableHistory(historised);’

For this node ‘historised’, history is enabled and the data is saved in the varibale in memory, but for the node I get from the xml model, the values are not saved.

Yes,
Below, is my function for simulating the varibal update.
“
int dx = 0;
…

public void simulate() throws StatusException, IllegalArgumentException {
UaNode historisedNode = this.getServer().getAddressSpace()
.getNode(NodeId.parseNodeId(“ns=5;i=6016”));
final DataValue v = ((CacheVariable) histoTest).getValue();
Double nextValue1 = v.isNull() ? 0 : v.getValue().doubleValue() + dx;
if (nextValue = 50) {
dx = -1;
}
try {
((CacheVariable) historisedNode ).updateValue(nextValue1);
} catch (Exception e) {
log.error(“Error while simulating {}”, e.getMessage());
}
}
“
In another class, I call the method periodically
“
@Scheduled(fixedDelay = 2000, initialDelay = 60000)
public final synchronized void simulate() throws IllegalArgumentException, StatusException {
nodeManager.simulate();
}
“

I made a mistake when I posted the code here.
It’s “UaNode histoTest = this.getServer().getAddressSpace().getNode(NodeId.parseNodeId(“ns=5;i=6016″));”
instead of “UaNode historisedNode = this.getServer().getAddressSpace().getNode(NodeId.parseNodeId(“ns=5;i=6016”));”

I finally found the problem, I hadn’t created my CustomNodeManager with the right namespace.
I have a question about the sample code for the prosys sdk for the server. In the MyHistorian class there is a method:
“
public void addVariableHistory(UaVariableNode variable) {
ValueHistory history = new ValueHistory(variable);
// History is being collected
variable.setHistorizing(true);
// History can be read
variable.setAccessLevel(
AccessLevelType.of(AccessLevelType.CurrentRead, AccessLevelType.CurrentWrite, AccessLevelType.HistoryRead));
NodeId nodeId =
new NodeId(variable.getNodeId().getNamespaceIndex(), variable.getNodeId().getValue() + “HAConfiguration”);
HistoricalDataConfigurationType historicalDataConf =
variable.getNodeManager().createInstance(HistoricalDataConfigurationType.class, “HA Configuration”, nodeId);
try {
historicalDataConf.setStepped(history.isStepped());
} catch (StatusException e) {
throw new RuntimeException(e);
}
variable.addReference(historicalDataConf, Identifiers.HasHistoricalConfiguration, false);

variableHistories.put(variable, history);
}
“
I don’t understant the piece of code :
“
NodeId nodeId =
new NodeId(variable.getNodeId().getNamespaceIndex(), variable.getNodeId().getValue() + “HAConfiguration”);
HistoricalDataConfigurationType historicalDataConf =
variable.getNodeManager().createInstance(HistoricalDataConfigurationType.class, “HA Configuration”, nodeId);
try {
historicalDataConf.setStepped(history.isStepped());
} catch (StatusException e) {
throw new RuntimeException(e);
}
“
It this essentiel for historisation to work ?