lux/EgwCoreLib.Lux.Data/Services/BaseServ.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;
using Newtonsoft.Json;
using NLog;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime;
using System.Text;
using System.Threading.Tasks;

namespace EgwCoreLib.Lux.Data.Services
{
    public class BaseServ
    {
        #region Public Constructors

        public BaseServ(IConfiguration configuration)
        {
            _configuration = configuration;

            // setup componenti REDIS
            redisConn = ConnectionMultiplexer.Connect(_configuration.GetConnectionString("Redis")??"localhost");
            redisDb = redisConn.GetDatabase();

            // json serializer... FIX errore loop circolare https://www.ryadel.com/en/jsonserializationexception-self-referencing-loop-detected-error-fix-entity-framework-asp-net-core/
            JSSettings = new JsonSerializerSettings()
            {
                ReferenceLoopHandling = ReferenceLoopHandling.Ignore
            };

            // recupero conf speciali
        }

        #endregion Public Constructors

        #region Protected Fields

        protected static IConfiguration _configuration = null!;
        protected JsonSerializerSettings? JSSettings;

        /// <summary>
        /// Oggetto per connessione a REDIS
        /// </summary>
        protected ConnectionMultiplexer redisConn = null!;

        //ISubscriber sub = redis.GetSubscriber();
        /// <summary>
        /// Oggetto DB redis da impiegare x chiamate R/W
        /// </summary>
        protected IDatabase redisDb = null!;

        #endregion Protected Fields

        #region Protected Properties

        /// <summary>
        /// Durata cache breve (1 min circa + perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan FastCache
        {
            get => TimeSpan.FromSeconds(cacheTtlShort * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache lunga (+ perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan LongCache
        {
            get => TimeSpan.FromSeconds(cacheTtlLong * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache MOLTO breve (10 sec circa + perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan UltraFastCache
        {
            get => TimeSpan.FromSeconds(cacheTtlShort / 6 * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache MOLTO lunga (+ perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan UltraLongCache
        {
            get => TimeSpan.FromSeconds(cacheTtlLong * 10 * rnd.Next(900, 1100) / 1000);
        }

        #endregion Protected Properties

        #region Private Fields

        private static Logger Log = LogManager.GetCurrentClassLogger();

        /// <summary>
        /// Durata cache lunga IN SECONDI
        /// </summary>
        private int cacheTtlLong = 60 * 5;

        /// <summary>
        /// Durata cache breve IN SECONDI
        /// </summary>
        private int cacheTtlShort = 60 * 1;

        private Random rnd = new Random();

        #endregion Private Fields
    }
}