Quickstart
Karan Kumar edited this page Nov 30, 2020
·
10 revisions
NOTE: This quickstart is for LazyCache version 2.x
Add LazyCache to your project
dotnet add MyProject package LazyCacheCreate a cache an use it:
//Create my cache manually
IAppCache cache = new CachingService();
// define a func to get the products but do not Execute() it
Func<IEnumerable<Product>> productGetter = () => dbContext.Products.ToList();
// Either get the results from the cache based on a unique key, or
// execute the func and cache the results
var productsWithCaching = cache.GetOrAdd("HomeController.Get", productGetter);
// use the cached results
System.Console.WriteLine($"Found {productsWithCaching.Count} products");LazyCache is designed for dependency injection and has support for the IoC container Microsoft.Extensions.DependencyInjection in the LazyCache.AspNetCore project. Add LazyCache.AspNetCore to your project (LazyCache.AspNetCore has a dependency on LazyCache so that will get installed automatically if not already)
dotnet add MyProject package LazyCache.AspNetCoreAdd the LazyCache services in your aspnet core Startup.cs
// This method gets called by the runtime. Use this method to add services.
public void ConfigureServices(IServiceCollection services)
{
// already existing registrations
services.AddMvc();
services.AddDbContext<MyContext>(options => options.UseSqlServer("some db"));
....
// Register LazyCache - makes the IAppCache implementation
// CachingService available to your code
services.AddLazyCache();
}Take IAppCache as a dependency in the constructor of the class in which you want to use it
public class HomeController : Controller
{
private readonly IAppCache cache;
private readonly ProductDbContext dbContext;
public HomeController(ProductDbContext dbContext, IAppCache cache)
{
this.dbContext = dbContext;
this.cache = cache;
}Wrap the call you want to cache in a lambda and use the cache:
[HttpGet]
[Route("api/products")]
public IEnumerable<Product> Get()
{
// define a func to get the products but do not Execute() it
Func<IEnumerable<Product>> productGetter = () => dbContext.Products.ToList();
// get the results from the cache based on a unique key, or
// execute the func and cache the results
var productsWithCaching = cache.GetOrAdd("HomeController.Get", productGetter);
return productsWithCaching;
}