NATS demos

This repo contains the code for the demos that I use during talks I give about NATS and NATS Streaming.

The slides of a talk I gave about NATS can be found here.

The repo contains the following demo projects:

NATS
- Basic messaging demos (pub/sub, request/response, queue-groups, wildcards).
NATS-Streaming
- BasicMessaging: basic messaging demo focussed on replaying messages.
- Store: simple event-based distributed book-store application using NATS and NATS-Streaming.

Within every demo folder I've included some Powershell scripts to start the necessary components.

The demos have some prerequisites:

All scripts that start NATS or NATS Streaming assume that the folders where you have installed the NATS and NATS Streaming executables are added to the PATH environment variable. If for some reason you don't want that, just change the path to the executable in the start-nats.ps1, start-nats-streaming.ps1, start-local-cluster.ps1 and add-server-to-cluster.ps1scripts.
The store demo assumes there is a SQL Server running on your local machine on port 1434. If you want to use a different host or port, change the connection-string in the 3 DBContext classes in the OrderProcesingService, OrdersQueryService and ShippingService. Also change the host and port in the reset.ps1 script.
The store demo assumes there's a folder D:\Temp\NATSDemos\Store. It uses this as the file-location for the file-system based storage provider for NATS Streaming. If you want to use a different folder, create it and change the folder in the start-nats.ps1 script and the reset.ps1 script.
If you want to use NATS Board for monitoring, you can use the start-monitor.ps1 script in the Store demo folder. This script assumes that have installed NATS Board (and node/npm) by executing npm install natsboard -g.

Disclaimer: the code is NOT production grade and only for demo purposes and for experimenting with NATS and NATS Streaming.

ma-hartma / nats-demos