School Commit Init

Anul 2/Semestrul 2/ISS/Lab2/CacheModule/CacheModule.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Anul 2/Semestrul 2/ISS/Lab2/CacheModule/CacheService.cs

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+using Timer = System.Timers.Timer;
+
+namespace CacheModule{
+
+    public class CacheService
+    {
+        private readonly Dictionary<string, Dictionary<string, CachedObject>> _cache = new Dictionary<string, Dictionary<string, CachedObject>>();
+
+        private static object _lock = new object();
+
+        private readonly Timer _timer = new Timer();
+
+        private static CacheService? _instance;
+
+        private CacheService(){
+            _timer.Interval = 3600 * 1000;
+            _timer.Elapsed += (sender, e) => ClearExpired();
+            _timer.Start();
+        }
+        public static CacheService Instance
+        {
+            get
+            {
+                lock (_lock)
+                {
+                    if (_instance == null)
+                    {
+                        _instance = new CacheService();
+                    }
+                    return _instance;
+                }
+            }
+        }
+
+        public void Add(string functionName, string functionParams, object value, Duration duration)
+        {
+            Add(functionName, functionParams, value, (int)duration);
+        }
+
+        public void Add(string functionName, string functionParams, object value, int duration)
+        {
+            if (!_cache.ContainsKey(functionName))
+            {
+                _cache[functionName] = new Dictionary<string, CachedObject>();
+            }
+
+            _cache[functionName][functionParams] = new CachedObject(){
+                Value = value,
+                Timestamp = DateTime.Now,
+                Duration = duration
+            };
+        }
+
+        public object? Get(string functionName, string functionParams)
+        {
+            if (!_cache.ContainsKey(functionName))
+            {
+                return null;
+            }
+
+            if (!_cache[functionName].ContainsKey(functionParams))
+            {
+                return null;
+            }
+            var cachedObject = _cache[functionName][functionParams];
+            if (cachedObject.IsExpired())
+            {
+                _cache[functionName].Remove(functionParams);
+                return null;
+            }
+            return cachedObject.Value;
+        }
+
+        public void Clear()
+        {
+            _cache.Clear();
+        }
+
+        public void Clear(string functionName)
+        {
+            if (_cache.ContainsKey(functionName))
+            {
+                _cache.Remove(functionName);
+            }
+        }
+
+        public void Clear(string functionName, string functionParams)
+        {
+            if (_cache.ContainsKey(functionName))
+            {
+                if (_cache[functionName].ContainsKey(functionParams))
+                {
+                    _cache[functionName].Remove(functionParams);
+                    if (_cache[functionName].Count == 0)
+                    {
+                        _cache.Remove(functionName);
+                    }
+                }
+            }
+        }
+
+        public void ClearExpired()
+        {
+            foreach (var functionName in _cache.Keys)
+            {
+                foreach (var functionParams in _cache[functionName].Keys)
+                {
+                    if (_cache[functionName][functionParams].IsExpired())
+                    {
+                        _cache[functionName].Remove(functionParams);
+                        if (_cache[functionName].Count == 0)
+                        {
+                            _cache.Remove(functionName);
+                        }
+                    }
+                }
+            }
+        }
+
+
+    }
+}

Anul 2/Semestrul 2/ISS/Lab2/CacheModule/CachedObject.cs

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+using System;
+
+namespace CacheModule{
+
+    public class CachedObject
+    {
+        public object? Value { get; set; }
+        public DateTime Timestamp {get; set; }
+        public int Duration { get; set; }
+
+        public bool IsExpired()
+        {
+            return DateTime.Now > Timestamp.AddSeconds(Duration);
+        }
+
+    }
+}

Anul 2/Semestrul 2/ISS/Lab2/CacheModule/Duration.cs

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+namespace CacheModule{
+    public enum Duration
+    {
+        OneSecond = 1,
+        OneMinute = 60,
+        OneHour = 3600,
+        OneDay = 86400,
+        OneWeek = 604800,
+        OneMonth = 2592000,
+        OneYear = 31536000,
+        FiveSeconds = 5,
+        ThirtySeconds = 30,
+        ThirtyMinutes = 1800,
+        SixHours = 21600,
+        TwelveHours = 43200,
+        TwoDays = 172800,
+        ThreeDays = 259200,
+        TwoWeeks = 1209600,
+        ThreeMonths = 7776000,
+        SixMonths = 15552000
+    }
+}