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23:33, EET
February 8, 2014
Offline
Hi,
I’m using the server SDK and trying to create a UaVariableNode that will contain an array of floating point values. Can you provide some sample code that shows how to create and update the object? Thanks.
8:25, EET
December 21, 2011
Offline
This sample is available in SampleConsoleServer.createStaticArrayVariable:
NodeId dataType, Object initialValue) throws StatusException {
final NodeId nodeId = new NodeId(complianceNamespaceIndex, dataTypeName);
UaType type = server.getNodeManagerRoot().getType(dataType);
UaVariableNode node = new CacheVariable(complianceNodeManager, nodeId,
dataTypeName, Locale.ENGLISH);
node.setDataType(type);
node.setTypeDefinition(type);
node.setValueRank(ValueRanks.OneDimension);
node.setArrayDimensions(new UnsignedInteger[] { UnsignedInteger
.valueOf(Array.getLength(initialValue)) });
node.setValue(new DataValue(new Variant(initialValue), StatusCode.GOOD,
new DateTime(), new DateTime()));
staticArrayVariableFolder.addReference(node, Identifiers.HasComponent,
false);
}
and it is called from createComplianceNodes, e.g.
new Boolean[] { true, false, true, false, false });
createStaticArrayVariable(
"ByteArray",
Identifiers.Byte,
new UnsignedByte[] { UnsignedByte.valueOf(1),
UnsignedByte.valueOf(2), UnsignedByte.valueOf(3),
UnsignedByte.valueOf(4), UnsignedByte.valueOf(5) });
18:24, EEST
June 29, 2017
Offline
Hello,
I am using the code above ( createStaticArrayVariable ) to generate a UaVariableNode but as an Identifiers.Int16 data type. When updating the value I can see that the value was changed, but subscribing (via UaExpert) doesn’t work (i.e. the initial value is shown but is not updated). Is this a general issue with array types or am I missing something? I tried UaVariableNode.setValue as well as UaVariableNode.updateValue.
16:03, EEST
April 17, 2013
Offline
Hello Sergej,
The above code should still work despite being 4 years old. And UaExpert should be able to create subscriptions to Array variables without issues.
How have you confirmed that the value was updated correctly on the server side?
Do you think you could compose an example project showing the issue so that we could reproduce this? I tested the above code snippets and UaExpert and I cannot find anything going wrong.
18:45, EEST
June 29, 2017
Offline
Hello Heikki,
I just sent an example of my use case and also detected the issue: the issue occurs if I don’t create a new instance of the new value but just update the value object by modifying the index based values. If I create a new object however (new operator) the value is updated.
8:57, EEST
April 3, 2012
Offline
Hi,
Answered via mail, but for others reading this, arrays are not defensively copied when passed, so you will need to use new array for each write, otherwise you are modifying the value within the node and that causes problems internally.
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