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Description

NeoSmart.Caching.Sqlite is an open-source package providing an IDistributedCache implementation backed by SQLite for ASP.NET Core projects that provides the middle ground between the ephemeral IMemoryCache and the full-blown IDistributedCache offerings that require separate servers or background services to provide a persistent key-value cache. Rationale, usage instructions, and more in the official release announcement.

Programming language: C#

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README

SqliteCache for ASP.NET Core

SqliteCache is a persistent cache implementing IDistributedCache for ASP.NET Core projects.

SqliteCache uses a locally stored SQLite database file (taking advantage of SQLite's battle-tested safe multi-threaded access features) to replicate persistent caching, allowing developers to mimic the behavior of staging or production targets without all the overhead or hassle of a traditional IDistributedCache implementation. You can read more about its design and inspiration in the official release post on the NeoSmart blog.

Why NeoSmart.Caching.Sqlite?

The currently available options for caching in ASP.NET Core projects are either all ephemeral in-memory cache offerings (IMemoryCache and co.) -- aka non-persistent -- or else have a whole slew of dependencies and requirements that require at the very least administrator privileges and background services hogging up system resources and needing updates and maintenance to requiring multiple machines and a persistent network configuration.

  • NeoSmart.Caching.Sqlite has no dependencies on background services that hog system resources and need to be updated or maintained (cough cough NCache cough cough)
  • NeoSmart.Caching.Sqlite is fully cross-platform and runs the same on your Windows PC or your colleagues' Linux, FreeBSD, and macOS workstations (unlike, say, Redis)
  • NeoSmart.Caching.Sqlite doesn't need administrator privileges to install - or even any installation for that matter (SQL Express LocalDB, this one is aimed at you)
  • NeoSmart.Caching.Sqlite is a fully contained IDistributedCache offering that is installed and updated alongside the rest of your packages via NuGet, Paket, or whatever other option you're already using to manage your dependencies.

Installation

SqliteCache is available via the NuGet, and can be installed in the Package Manager Console as follows:

Install-Package NeoSmart.Caching.Sqlite

Usage

Using SqliteCache is straight-forward, and should be extremely familiar for anyone that's configured an ASP.NET Core application before. Starting by adding a namespace import using NeoSmart.Caching.Sqlite makes things easier as the editor will pull in the correct extension methods.

If using SqliteCache in an ASP.NET Core project, the SQLite-backed cache should be added as an IDistributedCache type by adding the following to your ConfigureServices method, by default located in Startup.cs:

// using NeoSmart.Caching.Sqlite;

public void ConfigureServices(IServiceCollection services)
{
    ...

    // Note: this *must* come before services.AddMvc()!
    services.AddSqliteCache(options => {
        options.CachePath = @"C:\data\bazaar\cache.db";
    });

    services.AddMvc();

    ...
}

Afterwards, the SqliteCache instance will be made available to both the framework and the application via dependency injection, and can be imported and used via either the IDistributedCache abstract type or the concrete SqliteCache type:

// using Microsoft.Extensions.Caching.Distributed;
public class FooModel(DbContext db, IDistributedCache cache)
{
    _db = db;
    _cache = cache;

    cache.SetString("foo", "bar");
    Assert.AreEqual(cache.GetString("foo"), "bar");

    Assert.AreEqual(typeof(NeoSmart.Caching.Sqlite.SqliteCache),
                    cache.GetType());
}

License

SqliteCache is developed and maintained by Mahmoud Al-Qudsi of NeoSmart Technologies. The project is provided free to the community under the terms of the MIT open source license.

Contributing

We are open to pull requests and contributions aimed at the code, documentation, unit tests, or anything else. If you're mulling an extensive contribution, file an issue first to make sure we're all on the same page, otherwise, PR away!


*Note that all licence references and agreements mentioned in the SqliteCache for ASP.NET Core README section above are relevant to that project's source code only.