Converting Units

Purpose

This sample demonstrates how to use unit conversion extension for converting units.

Prerequisites

  • Save this sample. If there is no syntax error, the following messages would be shown on the console.

    * Siddhi App UnitConversionExtensionSample successfully deployed.

    Executing the Sample

    1. Start the Siddhi application by clicking on 'Run'.
    2. If the Siddhi application starts successfully, the following messages would be shown on the console. 

      * UnitConversionExtensionSample.siddhi - Started Successfully!

Testing the Sample

You can publish data event to the file, through event simulator

  1. Open event simulator by clicking on the second icon or press Ctrl+Shift+I.

  2. In the Single Simulation tab of the panel, select values as follows:

    • Siddhi App Name: UnitConversionExtensionSample
    • Stream name: SweetProductionStream

  3. Enter and send suitable values for the attributes of selected stream.

Viewing the Results

Messages similar to the following would be shown on the console. 

INFO {io.siddhi.core.stream.output.sink.LogSink} - UnitConversionExtensionSample : WeightConvertedStream : Event{timestamp=1513588858315, data=[Chocolate, 1250.0], isExpired=false}

@App:name("UnitConversionExtensionSample")
@App:description('Demonstrates how to use unit conversion extension for converting units.')


define stream SweetProductionStream (name string, amount double);

@sink(type='log')
define stream WeightConvertedStream(name string, weightInGrams double);

from SweetProductionStream
select name, unitconversion:kgTog(amount) as  weightInGrams
insert into WeightConvertedStream;
Top