ObjectPoolingAttribute.MinPoolSize プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

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ObjectPoolingAttribute.MinPoolSize プロパティ

プールの最小サイズの値を取得または設定します。

名前空間: System.EnterpriseServices
アセンブリ: System.EnterpriseServices (system.enterpriseservices.dll 内)
構文

Visual Basic (宣言)

Public Property MinPoolSize As
 Integer

Visual Basic (使用法)

Dim instance As ObjectPoolingAttribute
Dim value As Integer

value = instance.MinPoolSize

instance.MinPoolSize = value

public int MinPoolSize { get;
 set; }

C++

public:
property int MinPoolSize {
    int get ();
    void set (int value);
}

/** @property */
public int get_MinPoolSize ()

/** @property */
public void set_MinPoolSize (int
 value)

JScript

public function get MinPoolSize
 () : int

public function set MinPoolSize
 (value : int)

プロパティ値
プール内のオブジェクトの最小数。

解説

MinPoolSize は、アプリケーション起動時に作成されるオブジェクト数と、アプリケーションの実行中にプール内に保持されるオブジェクトの最小数を表します。プール内の使用できるオブジェクト数が指定された最小数より少なくなると、保留状態のオブジェクト要求を満たすだけの新しいオブジェクトが作成され、プールを再び満たします。最小数より多くなると、この数を超えた分のオブジェクトがクリーンアップサイクル時に破棄されます。

使用例

このプロパティの使用方法のコード例を次に示します。

Visual Basic

<JustInTimeActivation(), ObjectPooling(MinPoolSize := 2, MaxPoolSize := 100, CreationTimeout
 := 1000)>  _
Public Class ObjectInspector
    Inherits ServicedComponent
    
    
    Public Function IdentifyObject(ByVal
 obj As [Object]) As String
 
        ' Return this object to the pool after use.
        ContextUtil.DeactivateOnReturn = True
        
        ' Get the supplied object's type.        
        Dim objType As Type = obj.GetType()
        
        ' Return its name.
        Return objType.FullName
    
    End Function 'IdentifyObject

    Protected Overrides Sub
 Activate() 
        MessageBox.Show(String.Format("Now
 entering..." + vbLf + "Application: {0}"
 + vbLf + "Instance: {1}" + vbLf + "Context: {2}" + vbLf, ContextUtil.ApplicationId.ToString(), ContextUtil.ApplicationInstanceId.ToString(),
 ContextUtil.ContextId.ToString()))
    
    End Sub 'Activate

    Protected Overrides Sub
 Deactivate() 
        MessageBox.Show("Bye Bye!")
    
    End Sub 'Deactivate

    ' This object can be pooled.
    Protected Overrides Function
 CanBePooled() As Boolean 
        Return True
    
    End Function 'CanBePooled

End Class 'ObjectInspector

[JustInTimeActivation]
[ObjectPooling(MinPoolSize=2, MaxPoolSize=100, CreationTimeout=1000)]
public class ObjectInspector : ServicedComponent
{

    public string IdentifyObject (Object obj)
    {
        // Return this object to the pool after use.
        ContextUtil.DeactivateOnReturn = true;

        // Get the supplied object's type.        
        Type objType = obj.GetType();
        
        // Return its name.
        return(objType.FullName);

    }

    protected override void Activate()
    {
        MessageBox.Show( String.Format("Now entering...\nApplication: {0}\nInstance:
 {1}\nContext: {2}\n",
                                       ContextUtil.ApplicationId.ToString(), ContextUtil.ApplicationInstanceId.ToString()
,
                                       ContextUtil.ContextId.ToString() ) );
    }

    protected override void Deactivate()
    {
        MessageBox.Show("Bye Bye!");
    }

    // This object can be pooled.
    protected override bool CanBePooled()
    {
        return(true);
    }

}

C++

[assembly:ApplicationName("ObjectInspector")];
[assembly:ApplicationActivation(ActivationOption::Server)];
[assembly:System::Reflection::AssemblyKeyFile("Inspector.snk")];
[JustInTimeActivation]
[ObjectPooling(MinPoolSize=2,MaxPoolSize=100,CreationTimeout=1000)]
public ref class ObjectInspector: public
 ServicedComponent
{
public:
   String^ IdentifyObject( Object^ obj )
   {
      // Return this object to the pool after use.
      ContextUtil::DeactivateOnReturn = true;

      // Get the supplied object's type.        
      Type^ objType = obj->GetType();

      // Return its name.
      return (objType->FullName);
   }

protected:
   virtual void Activate() override
   {
      MessageBox::Show( String::Format( "Now entering...\nApplication: {0}\nInstance:
 {1}\nContext: {2}\n", ContextUtil::ApplicationId.ToString(), ContextUtil::ApplicationInstanceId.ToString(),
 ContextUtil::ContextId.ToString() ) );
   }

   virtual void Deactivate() override
   {
      MessageBox::Show( "Bye Bye!" );
   }

   // This object can be pooled.
   virtual bool CanBePooled() override
   {
      return (true);
   }
};

/** @attribute JustInTimeActivation()
 */
/** @attribute ObjectPooling(MinPoolSize = 2, MaxPoolSize = 100, 
    CreationTimeout = 1000)
 */
public class ObjectInspector extends ServicedComponent
{
    public String IdentifyObject(Object obj)
    {
        // Return this object to the pool after use.
        ContextUtil.set_DeactivateOnReturn(true);
        // Get the supplied object's type.        
        Type objType = obj.GetType();
        // Return its name.
        return objType.get_FullName();
    } //IdentifyObject

    protected void Activate()
    {
        MessageBox.Show(String.Format("Now entering...\nApplication: {0}\n"
            + "Instance: {1}\nContext: {2}\n",
            ContextUtil.get_ApplicationId().ToString(),
            ContextUtil.get_ApplicationInstanceId().ToString(),
            ContextUtil.get_ContextId().ToString()));
    } //Activate

    protected void Deactivate()
    {
        MessageBox.Show("Bye Bye!");
    } //Deactivate

    // This object can be pooled.
    protected boolean CanBePooled()
    {
        return true;
    } //CanBePooled
} //ObjectInspector