fishtoggles

Tiny tiny library for feature toggles in sql server

Install

dotnet add package fishtoggles

Usage

Add a call to UseFeatureToggles. Pass in commandline args and a logging delegate. Both can be empty. The name of the connection string can be passed in as a third argument. It defaults to "DefaultConnectionString"

public static IWebHost BuildWebHost(string[] args)
{
    return
        WebHost.CreateDefaultBuilder(args)
        .UseFeatureToggles(args, (ex, msg) => Log.Warning(ex, msg))
    .
    .
    .
}
        

If you don't want ability to read config from command line args and/or don't want any logging just pass in and empty array and/or no-op delegate like this:

WebHost.CreateDefaultBuilder(args)
        .UseFeatureToggles(new string[0], (x, y) => {})

Database

Run the following script in your database:

IF (NOT EXISTS (SELECT * 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_NAME = 'Toggles'))
BEGIN
    CREATE TABLE [Toggles] (
        [Id] nvarchar(450) NOT NULL,
        [Value] nvarchar(max) NULL,
        CONSTRAINT [PK_Toggles] PRIMARY KEY ([Id])
    );
END;

Insert named feature toggles in the toggles table:

INSERT INTO Toggles
VALUES ('FeatureMyFeature', 'true') --an enabled feature toggle named: FeatureMyFeature

Check the state of a feature toggle in code like this:

public void SomeMethod(IConfiguration configuration)
{
    if (configuration["FeatureMyFeature"])
    {
        //feature is enabled
    }
}