mapo-core/MP.Data/Services/TabDataService.cs

using Microsoft.Extensions.Configuration;
using MP.Data.DatabaseModels;
using Newtonsoft.Json;
using NLog.Fluent;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Threading.Tasks;

namespace MP.Data.Services
{
    public class TabDataService
    {
        #region Public Constructors

        public TabDataService(IConfiguration configuration)
        {
            _configuration = configuration;

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

            // conf DB
            string connStr = _configuration.GetConnectionString("Mp.All");
            if (string.IsNullOrEmpty(connStr))
            {
                Log.Error("ConnString empty!");
            }
            else
            {
                dbController = new Controllers.MpTabController(configuration);
                StringBuilder sb = new StringBuilder();
                sb.AppendLine($"TabDataService | MpSpecController OK");
                Log.Info(sb.ToString());
            }
        }

        #endregion Public Constructors

        protected static IConfiguration _configuration = null!;

        public static Controllers.MpTabController dbController { get; set; } = null!;

        public async Task<List<AnagEventiModel>> AnagEventiGetAll()
        {
            // setup parametri costanti
            bool inCorso = false;
            string keyRichPart = "*";
            string Reparto = "*";
            DateTime startDate = new DateTime(2000, 1, 1);
            DateTime endDate = DateTime.Today.AddDays(1);
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<AnagEventiModel>? result = new List<AnagEventiModel>();
            // cerco in redis...
            string currKey = $"{redisBaseKey}:AnagEventi";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (!string.IsNullOrEmpty($"{rawData}"))
            {
                result = JsonConvert.DeserializeObject<List<AnagEventiModel>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.AnagEventiGetAll();
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, LongCache);
            }
            if (result == null)
            {
                result = new List<AnagEventiModel>();
            }
            sw.Stop();
            return result;
        }
        #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

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

        /// <summary>
        /// Oggetto DB redis da impiegare x chiamate R/W
        /// </summary>
        protected IDatabase redisDb = null!;

        /// <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 string redisBaseKey = "MP:TAB:Cache";
        private Random rnd = new Random();
        #endregion Private Fields
    }
}