proxy

DesignPatternGuru/DesignPatternGuru.sln

@@ -25,9 +25,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Composite", "Composite\Comp
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Decorator", "Decorator\Decorator.csproj", "{8AA3ECFD-4F9A-433D-884C-E76E5050AFBF}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Facade", "Facade\Facade.csproj", "{7D6D306D-BC44-407A-9A39-104C90A3FA39}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Facade", "Facade\Facade.csproj", "{7D6D306D-BC44-407A-9A39-104C90A3FA39}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Flyweight", "Flyweight\Flyweight.csproj", "{D414F5DF-8FB2-4D77-A0C8-77B623A902DD}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Flyweight", "Flyweight\Flyweight.csproj", "{D414F5DF-8FB2-4D77-A0C8-77B623A902DD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Proxy", "Proxy\Proxy.csproj", "{F0E63700-B550-4D57-B912-18C28B3FEAC6}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -79,6 +81,10 @@ Global
 		{D414F5DF-8FB2-4D77-A0C8-77B623A902DD}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{D414F5DF-8FB2-4D77-A0C8-77B623A902DD}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{D414F5DF-8FB2-4D77-A0C8-77B623A902DD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F0E63700-B550-4D57-B912-18C28B3FEAC6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F0E63700-B550-4D57-B912-18C28B3FEAC6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F0E63700-B550-4D57-B912-18C28B3FEAC6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F0E63700-B550-4D57-B912-18C28B3FEAC6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -95,6 +101,7 @@ Global
 		{8AA3ECFD-4F9A-433D-884C-E76E5050AFBF} = {0B9333EC-FB73-4FEE-B600-9ECCD5A356B1}
 		{7D6D306D-BC44-407A-9A39-104C90A3FA39} = {0B9333EC-FB73-4FEE-B600-9ECCD5A356B1}
 		{D414F5DF-8FB2-4D77-A0C8-77B623A902DD} = {0B9333EC-FB73-4FEE-B600-9ECCD5A356B1}
+		{F0E63700-B550-4D57-B912-18C28B3FEAC6} = {0B9333EC-FB73-4FEE-B600-9ECCD5A356B1}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3E5A9C6B-2E8A-466E-B5E0-4379902EFFAC}

DesignPatternGuru/Flyweight/Program.cs

@@ -16,6 +16,7 @@ namespace Flyweight
             );
             factory.ListFlyweights();
 
+            Console.WriteLine();
             AddCarToPoliceDatabase(factory, new Car
             {
                 Number = "CL234IR",
@@ -25,6 +26,7 @@ namespace Flyweight
                 Color = "red"
             });
 
+            Console.WriteLine();
             AddCarToPoliceDatabase(factory, new Car
             {
                 Number = "CL234IR",
@@ -34,6 +36,7 @@ namespace Flyweight
                 Color = "red"
             });
 
+            Console.WriteLine();
             factory.ListFlyweights();
         }
 

DesignPatternGuru/Proxy/Client.cs

@@ -0,0 +1,17 @@
+using Proxy.Proxies;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Proxy
+{
+    internal class Client
+    {
+        public void ClientCode(ISubject subject) 
+        {
+            subject.Request();
+        }
+    }
+}

DesignPatternGuru/Proxy/Program.cs

@@ -0,0 +1,22 @@
+using Proxy.Proxies;
+
+namespace Proxy
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Client client = new Client();
+
+            Console.WriteLine("Client: Executing the client code with a real subject:");
+            RealSubject realSubject = new RealSubject();
+            client.ClientCode(realSubject);
+
+            Console.WriteLine();
+
+            Console.WriteLine("Client: Executing the same client code with a proxy");
+            Proxies.Proxy proxy = new Proxies.Proxy(realSubject);
+            client.ClientCode(proxy);
+        }
+    }
+}

DesignPatternGuru/Proxy/Proxies/ISubject.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Proxy.Proxies
+{
+    internal interface ISubject
+    {
+        void Request();
+    }
+}

DesignPatternGuru/Proxy/Proxies/Proxy.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Proxy.Proxies
+{
+    internal class Proxy : ISubject
+    {
+        private RealSubject _realSubject;
+
+        public Proxy(RealSubject realSubject)
+        {
+            _realSubject = realSubject;
+        }
+
+        public void Request()
+        {
+            if (!CheckAccess())
+                return;
+
+            _realSubject.Request();
+
+            LogAccess();
+        }
+
+        public bool CheckAccess()
+        {
+            Console.WriteLine("Proxy: Checking access prior to firing a real request.");
+
+            return true;
+        }
+
+        public void LogAccess()
+        {
+            Console.WriteLine($"Proxy: Logging the time of request@{DateTime.Now}");
+        }
+    }
+}

DesignPatternGuru/Proxy/Proxies/RealSubject.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Proxy.Proxies
+{
+    internal class RealSubject : ISubject
+    {
+        public void Request()
+        {
+            Console.WriteLine("RealSubject: Handling Request.");
+        }
+    }
+}

DesignPatternGuru/Proxy/Proxy.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>