This application fetches stock prices from a remote service using HttpClient, caches them in a grain, and displays them on screen.
- How to use Orleans from within a
BackgroundService. - How to use timers within a grain
- How to make external service calls using .NET's
HttpClientand cache the results within a grain.
A BackgroundService periodically requests the stock price for a variety of stocks from corresponding StockGrain instances.
Each StockGrain is identified by its stock ticker symbol, for example, the string "MSFT".
For the sample to display all of the stocks included, it requires replacing the ApiKey constant in StockGrain.cs with an API key obtained from https://www.alphavantage.co/support/#api-key.
The sample can be run without replacing this key, but a warning message may be printed with directions on how to obtain an API key.
To run the sample, execute dotnet run.