Dynamic Attribute of type Enum
avatar par défaut
Vatsal
Hi,

I'm exploring the concept of Dynamic Attribute. I'm able to successfully create and use attributes dynamically of type Double, Float, String, etc. But if I try to dynamically create an attribute of type "DevEnum" I get following error:

ERROR 2015-09-09 20:10:27,699 [RequestProcessor-5 - td/1/1] org.tango.utils.DevFailedUtils.throwDevFailed:37 - org.tango.testdynamic.DynamicEnumAttrEnum cannot be an attribute
ERROR 2015-09-09 20:10:27,706 [RequestProcessor-5 - td/1/1] org.tango.utils.DevFailedUtils.throwDevFailed:38 - 
fr.esrf.Tango.DevFailed: IDL:Tango/DevFailed:1.0
	at org.tango.utils.DevFailedUtils.throwDevFailed(DevFailedUtils.java:36) ~[JTango-9.0.3.jar:na]
	at org.tango.server.attribute.AttributeValue.setValue(AttributeValue.java:118) [JTango-9.0.3.jar:na]
	at org.tango.server.attribute.AttributeValue.<init>(AttributeValue.java:61) [JTango-9.0.3.jar:na]
	at org.tango.testdynamic.DynamicEnumAttr.getValue(DynamicEnumAttr.java:128) [TestDynamic/:na]
	at org.tango.server.attribute.AttributeImpl.updateValue(AttributeImpl.java:187) [JTango-9.0.3.jar:na]
	at org.tango.server.servant.DeviceImpl.checkAlarms(DeviceImpl.java:2350) [JTango-9.0.3.jar:na]
	at org.tango.server.servant.DeviceImpl.getState(DeviceImpl.java:2332) [JTango-9.0.3.jar:na]
	at org.tango.server.servant.DeviceImpl.executeStateCmd(DeviceImpl.java:423) [JTango-9.0.3.jar:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_31]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_31]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_31]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_31]
	at org.tango.server.command.ReflectCommandBehavior.execute(ReflectCommandBehavior.java:66) [JTango-9.0.3.jar:na]
	at org.tango.server.command.CommandImpl.execute(CommandImpl.java:90) [JTango-9.0.3.jar:na]
	at org.tango.server.servant.DeviceImpl.commandHandler(DeviceImpl.java:1730) [JTango-9.0.3.jar:na]
	at org.tango.server.servant.DeviceImpl.command_inout_4(DeviceImpl.java:1609) [JTango-9.0.3.jar:na]
	at fr.esrf.Tango.Device_5POA._invoke(Device_5POA.java:229) [JTango-9.0.3.jar:na]
	at org.jacorb.poa.RequestProcessor.invokeOperation(RequestProcessor.java:350) [JTango-9.0.3.jar:na]
	at org.jacorb.poa.RequestProcessor.process(RequestProcessor.java:672) [JTango-9.0.3.jar:na]
	at org.jacorb.poa.RequestProcessor.run(RequestProcessor.java:830) [JTango-9.0.3.jar:na]

I know that the TANGO 9 is not yet officially released and the Enum datatype is a feature of TANGO 9. I just want to know if the error is because of the incorrect code or the feature of Dynamic Attribute with Enum Datatype is not yet implemented.

I have attached the device server code.

I'm using the JTango-9.0.3 jar file. I generate the code using the Pogo-9.1.2a which has the feature of using Enumeration as TANGO Deta types.
Attachments: 18Kb
avatar par défaut
gwen
Hello,

The enum attribute is implemented in Java. You can either use it with:
- a Java enum. Example:


    public enum TestType {
        VALUE1, VALUE2
    }

    @Attribute
    private TestType enumAttribute = TestType.VALUE1;

    public TestType getEnumAttribute() {
        return enumAttribute;
    }

    public void setEnumAttribute(final TestType enumAttribute) {
        this.enumAttribute = enumAttribute;
    }

- or with a dynamic attribute. In this case, the value returned in getValue must be a short (and not an enum as in your code). It allows to have a configurable list of enum values with the attribute property "enum_labels". Example:


package org.tango.server.testserver;

import org.tango.server.StateMachineBehavior;
import org.tango.server.attribute.AttributeConfiguration;
import org.tango.server.attribute.AttributePropertiesImpl;
import org.tango.server.attribute.AttributeValue;
import org.tango.server.attribute.IAttributeBehavior;

import fr.esrf.Tango.AttrDataFormat;
import fr.esrf.Tango.AttrWriteType;
import fr.esrf.Tango.DevFailed;
import fr.esrf.TangoDs.TangoConst;

public class DynamicEnumAttribute implements IAttributeBehavior {

    private final AttributeConfiguration configAttr = new AttributeConfiguration();
    private short value = 0;

    public DynamicEnumAttribute() throws DevFailed {
        final AttributePropertiesImpl props = new AttributePropertiesImpl();
        props.setLabel("DevEnumDynamic");
        props.setEnumLabels(new String[] { "label1", "label2" });
        configAttr.setTangoType(TangoConst.Tango_DEV_ENUM, AttrDataFormat.SCALAR);
        configAttr.setName("DevEnumDynamic");
        configAttr.setWritable(AttrWriteType.READ_WRITE);
        configAttr.setAttributeProperties(props);
    }

    @Override
    public AttributeConfiguration getConfiguration() throws DevFailed {
        return configAttr;
    }

    @Override
    public AttributeValue getValue() throws DevFailed {
        return new AttributeValue(value);
    }

    @Override
    public void setValue(final AttributeValue value) throws DevFailed {
        this.value = (Short) value.getValue();
    }

    @Override
    public StateMachineBehavior getStateMachine() throws DevFailed {
        return null;
    }

}

Best Regards,

Gwenaëlle.
 
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