object pool pattern

DesignPattern/DesignPattern.sln

@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Factory", "Factory\Factory.
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Prototype", "Prototype\Prototype.csproj", "{C5EFDAF1-61D2-4B66-BCE2-2A54632F3F7A}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ObjectPool", "ObjectPool\ObjectPool.csproj", "{64993D9F-0D9E-42B6-B032-800DA2DD453B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -33,6 +35,10 @@ Global
 		{C5EFDAF1-61D2-4B66-BCE2-2A54632F3F7A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C5EFDAF1-61D2-4B66-BCE2-2A54632F3F7A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C5EFDAF1-61D2-4B66-BCE2-2A54632F3F7A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{64993D9F-0D9E-42B6-B032-800DA2DD453B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{64993D9F-0D9E-42B6-B032-800DA2DD453B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{64993D9F-0D9E-42B6-B032-800DA2DD453B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{64993D9F-0D9E-42B6-B032-800DA2DD453B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

DesignPattern/ObjectPool/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
+    </startup>
+</configuration>

DesignPattern/ObjectPool/Client.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ObjectPool
+{
+	class Client
+	{
+		public static void HowToUse()
+		{
+			MyConnectionPool myPool = new MyConnectionPool();
+			MyConnection conn = myPool.GetObject();
+			// use conn object
+
+			myPool.ReleaseObject(conn);
+
+			MyConnection conn2 = myPool.GetObject();
+			// use conn2 object
+
+			myPool.ReleaseObject(conn2);
+		}
+	}
+}

DesignPattern/ObjectPool/MyConnection.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ObjectPool
+{
+	class MyConnection
+	{
+
+	}
+}

DesignPattern/ObjectPool/MyConnectionPool.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ObjectPool
+{
+	class MyConnectionPool
+	{
+		private readonly ConcurrentBag<MyConnection> pool = new ConcurrentBag<MyConnection>();
+
+		public MyConnection GetObject()
+		{
+			MyConnection obj;
+			if (pool.TryTake(out obj))
+				return obj;
+			else
+				return new MyConnection();
+		}
+
+		public void ReleaseObject(MyConnection conn)
+		{
+			pool.Add(conn);
+			Console.WriteLine($"Release: {conn.GetHashCode()}");
+		}
+	}
+}

DesignPattern/ObjectPool/ObjectPool.csproj

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{64993D9F-0D9E-42B6-B032-800DA2DD453B}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>ObjectPool</RootNamespace>
+    <AssemblyName>ObjectPool</AssemblyName>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Client.cs" />
+    <Compile Include="MyConnection.cs" />
+    <Compile Include="MyConnectionPool.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/ObjectPool/Program.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ObjectPool
+{
+	/*
+	 * 카테고리: 생성패턴
+	 * 개요: 객체 생성에 리소스 소모가 커 그 자체가 프로그램의 성능에 영향을 미치는 경우, 미리 만들어두고 사용
+	 * 객체 요청 시 Pool에 사용 가능한 객체가 있는지 확인하고 없는 경우에만 새로 객체를 생성
+	 */
+	class Program
+	{
+		static void Main(string[] args)
+		{
+			Client.HowToUse();
+			Console.ReadKey();
+		}
+	}
+}

DesignPattern/ObjectPool/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("ObjectPool")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ObjectPool")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("64993d9f-0d9e-42b6-b032-800da2dd453b")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]