Historical data and Column Chart

Question

Hello
I am trying to retrive historical data from the repository and show it as a column chart through flex UI Implementation.
My Metric is defined as below and it has two columns defined as KEY columns
<Metric NAME="EnergyConsumptionCost" TYPE="TABLE" USAGE_TYPE="VIEW_COLLECT" FORCE_CACHE="TRUE">
<Display>
<Label NLSID="flex_energyCosumptionCost">Energy Consumption Cost Metric</Label>
</Display>
<TableDescriptor>
<ColumnDescriptor NAME="DeviceID" TYPE="STRING" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_DeviceID">Device ID</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="DeviceName" TYPE="STRING" IS_KEY="TRUE">
<Display>
<Label NLSID="flex_deviceName">Device Name</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="EnergyCost" TYPE="NUMBER" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_EnergyCost">Energy Cost</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="CurrencySymbol" TYPE="STRING" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_Currency">Currency</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="EnergyConsumption" TYPE="NUMBER" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_energyConsumption">Energy Consumption</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="Unit" TYPE="STRING" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_Unit">Unit</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="PerUnitRate" TYPE="NUMBER" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_PerUnitRate">Unit Rate</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="DateCollected" TYPE="STRING" IS_KEY="TRUE">
<Display>
<Label NLSID="flex_DateCollected">Metric Collection Date</Label>
</Display>
</ColumnDescriptor>
<ColumnDescriptor NAME="ExtraDetails" TYPE="STRING" IS_KEY="FALSE">
<Display>
<Label NLSID="flex_extraDetails">Extra Details</Label>
</Display>
</ColumnDescriptor>
</TableDescriptor>
<QueryDescriptor FETCHLET_ID="OSLineToken">
<Property NAME="scriptsDir" SCOPE="SYSTEMGLOBAL">scriptsDir</Property>
<Property NAME="classpath" SCOPE="GLOBAL">$CLASSPATH:%scriptsDir%/EnergyDashboardEjbBeanService-Client.jar</Property>
<Property NAME="command" SCOPE="GLOBAL">java -cp %classpath% com.avocent.trellis.oem.plugin.energy.insight.proxy.EnergyDashboardEjbBeanServicePortClient GraphRequest %DeviceID% %StartDate% %EndDate% </Property>
<Property NAME="startsWith" SCOPE="GLOBAL">ext_result=</Property>
<Property NAME="delimiter" SCOPE="GLOBAL">|</Property>
</QueryDescriptor>
</Metric>
I am implement the UI now using flex programming and below is the code of my page contoller class
public class emersontrellisflexHomePageController extends ActivityController
private var page:emersontrellisflexHomePage;
[Bindable]
public var metricDataArrayCollection:ArrayCollection;
public function emersontrellisflexHomePageController()
override public function init(pg:IActivity):void
super.init(pg);
page = pg as emersontrellisflexHomePage;
// get EnergyConsumptionCost metric to get energy consumption cost information
var procMetric:Metric = ApplicationContext.getTargetContext().getMetric("EnergyConsumptionCost");
var procSelector:MetricSelector = procMetric.getSelector(['DeviceID', 'DeviceName','EnergyCost','CurrencySymbol','EnergyConsumption','Unit','PerUnitRate','DateCollected','ExtraDetails']);
procSelector.getData(energyConsumptionCostHandler, MetricCollectionTimePeriod.CURRENT, page.getBatchRequest());
// structure of the data is as follows:
// MetricResultSet -- contains an Array (results) of all the datapoints. If the
// time period is LAST_* then this will be multiple datapoints for each timestamp.
// results[] -- each row in results is a TimestampMetricData datapoint.
// TimestampMetricData -- a datapoint that includes a timestamp and then a table (data) of
// data for all keys included in the sample. If the metric does not have any keys
// then the table will only have a single row.
// data -- the data table, each row is a KeyMetricData object
// KeyMetricData -- the data row, it includes a MetricKeyValue (metricKey) that
// identifies the key associated with that row (if there is one). All other
// data is available via a direct reference by column name, e.g. data[n]['ColumnId']
public function energyConsumptionCostHandler(procResult:MetricResultSet, fault:ServiceFault):void
if(fault != null)
MpLog.logError(fault, "Get Processes");
return;
if(procResult!=null)
var dataLength:int = 0;
var dp:TimestampMetricData = procResult.results[0];
if(dp != null)
dataLength = dp.data.length;
var metricData:EcecObject ;
var data:KeyMetricData;
metricDataArrayCollection= new ArrayCollection();
for(var i:int=0; i<dataLength; i++)
data= dp.data;
Alert.show("Data["+i+"]="+dp.data[i].toString());
metricData= new EcecObject();
metricData.deviceID=dp.data[i]['DeviceID'];
metricData.deviceName=dp.data[i]['DeviceName'];
metricData.energyCost=dp.data[i]['EnergyCost'];
metricData.currencySymbol=dp.data[i]['CurrencySymbol'];
metricData.energyConsumption=dp.data[i]['EnergyConsumption'];
metricData.unit=dp.data[i]['Unit'];
metricData.perUnitRate=dp.data[i]['PerUnitRate'];
metricData.dateCollected=dp.data[i]['DateCollected'];
metricData.extraDetails=dp.data[i]['ExtraDetails'];
metricDataArrayCollection.addItem(metricData);
page.setModel("metricDataCollection",metricDataArrayCollection);
} //End of function energyConsumptionCostHandler
} //End of class
In the handler code I am populating the ArrayCollection with the objects of class "EcecObject" which is defined by me and looks as below
package mpcui
[Bindable]
public class EcecObject
public function EcecObject()
public var deviceID:String;
public var deviceName:String;
public var energyCost:Number;
public var currencySymbol:String;
public var energyConsumption:Number;
public var unit:String;
public var perUnitRate:Number;
public var dateCollected:String;
public var extraDetails:String;
public function toString():String
// TODO Auto Generated method stub
var result:String= "DeviceId="+deviceID+" DeviceName="+deviceName+" EnergyCost="+energyCost+" CurrencySymbol="+currencySymbol+" EnergyComsumption="+energyConsumption+" Unit="+unit+" unitRate="+this.perUnitRate+" dateCollected="+dateCollected+" ExtraDetails="+extraDetails;
return result;
Sample below shows the data populated in the object of type "EcecObject"
(mx.collections::ArrayCollection)#0
filterFunction = (null)
length = 15
list = (mx.collections::ArrayList)#1
length = 15
source = (Array)#2
[0] (mpcui::EcecObject)#3
currencySymbol = ".25"
dateCollected = (null)
deviceID = "KWH"
deviceName = (null)
energyConsumption = NaN
energyCost = NaN
extraDetails = "d6ffcc59-ec5a-424d-a950-dcf3944059c9"
perUnitRate = NaN
unit = "Dollar"
So if we see in the attribute "currencySymbol" the "perUnitRate" is poulated even if my handler code has the following statement
metricData.currencySymbol=dp.data[i]['CurrencySymbol'];
Want to know why the data is swaped in most of the cases. Any correction to be done in the handler code.
Appreciate your help.
Regards
Anand.

Answer 1

The design depends on how much data you are having. If you have lot of data its better to use them separately.
When you create a cube you load historical data from source systems through a full load and later you will be doing delta loads to process new records.
As for as the data is conccerned a cube can contain both historical and transaction data.