using System;

using KGySoft.Collections;

using KGySoft.CoreLibraries;

public class Program

{

    public static void Main()

    {

        var cacheOptions = new LockingCacheOptions

        {

            Capacity = 100,

            Expiration = TimeSpan.FromMilliseconds(100)

        };

        var cache = ThreadSafeCacheFactory.Create<int, string>(LoadCacheValue, cacheOptions);

        Console.WriteLine(cache[42]);

        Console.WriteLine(cache[42]);

        // waiting for the value to expire

        System.Threading.Thread.Sleep(200);

        Console.WriteLine(cache[42]);

    }

    private static string LoadCacheValue(int key)

    {

        Console.WriteLine($"Obtaining value for key {key}");

        return Random.Shared.NextString();

    }

}