real-time-data-simulator's Introduction

Real-Time Data Simulator

Windows Desktop application to generate and stream data into EventHub.

Screenshot

Main Features

Configurable target EventHub
Configurable size of workload (amount of messages to be sent)
Easily editable JSON payload
Sending defined payload into the target endpoint
Load/Save payload as a file locally
Runtime evaluation of pre-defined variables
Runtime evaluation of expression in C# (slower)

Scenarios

Generate dynamic data based on JSON template and send it to Microsoft Fabric EventHub (custom endpoint).
Generate dynamic data based on JSON template and send it to EventHub.

Tokens

The biggest advantage of the application is the ability to generate value for the tokens listed in the PAYLOAD definition. Data generation takes place on the fly for each message prepared for sending.

Variables

Format of a variable: {{VariableName}}
The following examples depict predefined Variables you can use as Tokens:

Variable	Generates
`{{UserId}}`	Numeric (int) value from range 5000-5100
`{{ProductId}}`	Numeric (int) value from range 700-999
`{{Device}}`	Random item from array of: mobile,tablet,pc
`{{DateTime.Now}}`	Current date & time (now) in round-trip ("O") format.
`{{FuelType(MessageIndex)}}`	Value selected on `MessageIndex` from list: BIOMASS,CCGT,COAL,INTELEC,INTEW,INTFR,INTIFA2,INTIRL,INTNED,INTNEM,INTNSL,INTVKL,NPSHYD,NUCLEAR,OCGT,OIL,OTHER,PS,WIND
`{{SettlementPeriod}}`	Hardcoded Int value: `48`

C# Expressions

Format of an expression: {{$Expression}}
Expressions are slower in generating values, but more flexible. Use can use any C# compatible code from preloaded namespaces (for example: System). Expressions are being evaluated using Microsoft.CodeAnalysis.CSharp.Scripting.

Expression	Generates
`{{$DateTime.Now}}`	Current date & time (now)
`{{$new Random().Next(100,200)}}`	Random numeric (int) value from range 100-199
`{{$DateTime.Now.AddSeconds(-5).ToString("s")+"Z"}}`	Date & time 5 seconds ago in Sortable date/time pattern with 'Z' at the end.
`{{$DateTime.Now.ToString("dd/MM/yyyy")}}`	Current date & time formatted to `31/12/2020`
`{{$DateTime.Now.Hour*2+Math.Floor(DateTime.Now.Minute/30d)`	Calculation based on Current Time

References

Get a custom endpoint without creating an EventHub for EventStreams
Similar project: Mockingbird

Release Notes

New features, bug fixes and changes can be found here.

real-time-data-simulator's Issues

APPLY button to update payload while app is sending messages

Currently, when you click RUN - threads are triggered with current definition of payload, which can't be change until complete.
With this new feature user would be able to change payload and when apply - the new payload would be sent to running threads.

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