RestDataSource problem when generating a DataSource twice with "new"

[Blama]

Hi Isomorphic,

I'm creating a 2nd SmartGWT project (a connector that will connect my system with different other systems).
In order to display some data from my system I'm using RestDataSource.

Here I have the problem that I get this warning in the Dev Mode Tab in Eclipse when using the same RestDataSource twice with new:

[ERROR] [connector] - 12:42:35.222:MUP0:WARN:Log:Specified ID: T_LEADTEMPERATURE collides with the ID for an existing SmartGWT component or object. The existing object will be destroyed and the ID bound to the new object.

The DataSource I use is defined as below:

LeadtemperatureDS.java:

package com.lmscompany.connector.client.datasources;

import com.lmscompany.connector.shared.type.RestDatasourceEnum;
import com.lmscompany.connector.shared.type.RestDatasourceFieldEnum;
import com.smartgwt.client.data.fields.DataSourceBooleanField;
import com.smartgwt.client.data.fields.DataSourceIntegerField;
import com.smartgwt.client.data.fields.DataSourceTextField;

public class LeadtemperatureDS extends LMSRestDataSource {

    public LeadtemperatureDS() {
        super();
        setID(RestDatasourceEnum.T_LEADTEMPERATURE.getValue());

        DataSourceIntegerField id = new DataSourceIntegerField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__ID.getValue());
        id.setPrimaryKey(true);
        id.setCanEdit(false);

        DataSourceTextField shortname = new DataSourceTextField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__SHORTNAME.getValue());
        DataSourceTextField name = new DataSourceTextField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__NAME.getValue());
        DataSourceTextField description = new DataSourceTextField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__DESCRIPTION.getValue());
        DataSourceIntegerField position = new DataSourceIntegerField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__POSITION.getValue());
        DataSourceBooleanField available = new DataSourceBooleanField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__AVAILABLE.getValue());

        setFields(id, shortname, name, description, position, available);
    }
}

Now I use it twice like the following in a ListGridField:

ListGridField snippet:

            ListGridField leadtemperatureLGF = new ListGridField(DatasourceFieldEnum.T_LEADIMPORT_SETTINGS__LEADTEMPERATURE_ID.getValue());
            [B]leadtemperatureLGF.setOptionDataSource(new LeadtemperatureDS());[/B]
            leadtemperatureLGF.setValueField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__ID.getValue());
            leadtemperatureLGF.setDisplayField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__NAME.getValue());

            SelectItem leadtemperatureSI = new SelectItem();
            [B]leadtemperatureSI.setOptionDataSource(new LeadtemperatureDS());[/B]
            leadtemperatureSI.setOptionCriteria(
                    new AdvancedCriteria(new Criterion(RestDatasourceFieldEnum.T_LEADTEMPERATURE__AVAILABLE.getValue(), OperatorId.EQUALS, true)));
            leadtemperatureSI.setValueField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__ID.getValue());
            leadtemperatureSI.setSortField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__POSITION.getValue());
            leadtemperatureSI.setDisplayField(RestDatasourceFieldEnum.T_LEADTEMPERATURE__NAME.getValue());
            leadtemperatureLGF.setEditorProperties(leadtemperatureSI);

            usedFields.add(leadtemperatureLGF);

I think that I need the setID() in my RestDataSource-subclass as otherwise it is not clear for the RESTHandler-servlet which DataSource to ask.
So my next thought is: Do I need to use a singleton for my RestDataSource-subclass?

Is this correct, and if so, is it documented somewhere?

Thank you & Best regards
Blama

[Isomorphic]

You can't create two instances of any SmartGWT object with the same global ID: Canvas, FormItem, DataSource, etc.

Create one instance of the DataSource and re-use it.