化零为整WCF(10) - 实例模型(InstanceContextMode)

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化零为整WCF(10) - 实例模型(InstanceContextMode)


作者:webabcd


介绍
WCF(Windows Communication Foundation) - 实例模型:
    ServiceBehavior
    ·InstanceContextMode.PerCall - 新的 System.ServiceModel.InstanceContext 对象在每次调用前创建,在调用后回收。
    ·InstanceContextMode.PerSession - 为每个会话创建一个新的 System.ServiceModel.InstanceContext 对象。
    ·InstanceContextMode.Single - 只有一个 System.ServiceModel.InstanceContext 对象用于所有传入呼叫,并且在调用后不回收。如果服务对象不存在,则创建一个。



示例
1、服务
PerCallMode.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.InstanceMode
{
    
/// <summary>
    
/// 演示实例模型的接口(PerCall)
    
/// </summary>

    [ServiceContract]
    
public interface IPerCallMode
    
{
        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        [OperationContract]
        
int Counter();
    }


    
/// <summary>
    
/// 演示实例模型的类(PerCall)
    
/// </summary>
    
/// <remarks>
    
/// InstanceContextMode - 获取或设置指示新服务对象何时创建的值。
    
/// InstanceContextMode.PerCall - 新的 System.ServiceModel.InstanceContext 对象在每次调用前创建,在调用后回收。
    
/// </remarks>

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
    
public class PerCallMode : IPerCallMode
    
{
        
private int _counter;

        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        public int Counter()
        
{
            _counter
++;

            
return _counter;
        }

    }

}


PerSessionMode.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.InstanceMode
{
    
/// <summary>
    
/// 演示实例模型的接口(PerSession)
    
/// </summary>

    [ServiceContract()]
    
public interface IPerSessionMode
    
{
        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        [OperationContract]
        
int Counter();
    }


    
/// <summary>
    
/// 演示实例模型的类(PerCall)
    
/// </summary>
    
/// <remarks>
    
/// InstanceContextMode - 获取或设置指示新服务对象何时创建的值。
    
/// InstanceContextMode.PerSession - 为每个会话创建一个新的 System.ServiceModel.InstanceContext 对象。
    
/// InstanceContextMode 的默认值为 InstanceContextMode.PerSession
    
/// </remarks>

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)]
    
public class PerSessionMode : IPerSessionMode
    
{
        
private int _counter;

        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        public int Counter()
        
{
            _counter
++;

            
return _counter;
        }

    }

}


SingleMode.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.ServiceModel;

namespace WCF.ServiceLib.InstanceMode
{
    
/// <summary>
    
/// 演示实例模型的接口(Single)
    
/// </summary>

    [ServiceContract]
    
public interface ISingleMode
    
{
        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        [OperationContract]
        
int Counter();
    }


    
/// <summary>
    
/// 演示实例模型的接口(Single)
    
/// </summary>
    
/// <remarks>
    
/// InstanceContextMode - 获取或设置指示新服务对象何时创建的值。
    
/// InstanceContextMode.Single - 只有一个 System.ServiceModel.InstanceContext 对象用于所有传入呼叫,并且在调用后不回收。如果服务对象不存在,则创建一个。
    
/// </remarks>

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    
public class SingleMode : ISingleMode
    
{
        
private int _counter;

        
/// <summary>
        
/// 获取计数器结果
        
/// </summary>
        
/// <returns></returns>

        public int Counter()
        
{
            _counter
++;

            
return _counter;
        }

    }

}



2、宿主
PerCallMode.svc
<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.PerCallMode" %>

PerSessionMode.svc
<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.PerSessionMode" %>

SingleMode.svc
<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.InstanceMode.SingleMode" %>

Web.config
<?xml version="1.0"?>
<configuration>
    
<system.serviceModel>
        
<behaviors>
            
<serviceBehaviors>
                
<behavior name="InstanceModeBehavior">
                    
<!--httpGetEnabled - 使用get方式提供服务-->
                    
<serviceMetadata httpGetEnabled="true" />
                    
<serviceDebug includeExceptionDetailInFaults="true"/>
                
</behavior>
            
</serviceBehaviors>
        
</behaviors>
        
<services>
            
<!--name - 提供服务的类名-->
            
<!--behaviorConfiguration - 指定相关的行为配置-->
            
<service name="WCF.ServiceLib.InstanceMode.PerCallMode" behaviorConfiguration="InstanceModeBehavior">
                
<!--address - 服务地址-->
                
<!--binding - 通信方式-->
                
<!--contract - 服务契约-->
                
<endpoint address="" binding="basicHttpBinding" contract="WCF.ServiceLib.InstanceMode.IPerCallMode" />
            
</service>
            
<service name="WCF.ServiceLib.InstanceMode.PerSessionMode" behaviorConfiguration="InstanceModeBehavior">
                
<!--bindingConfiguration - 指定相关的绑定配置-->
                
<endpoint address="" binding="wsHttpBinding" contract="WCF.ServiceLib.InstanceMode.IPerSessionMode" bindingConfiguration="PerSessionModeBindingConfiguration"/>
            
</service>
            
<service name="WCF.ServiceLib.InstanceMode.SingleMode" behaviorConfiguration="InstanceModeBehavior">
                
<endpoint address="" binding="basicHttpBinding" contract="WCF.ServiceLib.InstanceMode.ISingleMode" />
            
</service>
        
</services>
        
<bindings>
            
<wsHttpBinding>
                
<!--wsHttpBinding 可提供 安全会话 和 可靠会话-->
                
<binding name="PerSessionModeBindingConfiguration">
                    
<!--指示是否在通道终结点之间建立 WS-RM (WS-ReliableMessaging) 可靠会话。默认值为 false。-->
                    
<reliableSession enabled="true"/>
                    
<security>
                        
<!--此属性控制安全上下文令牌是否通过客户端与服务之间的 WS-SecureConversation 交换建立。将它设置为 true 要求远程方支持 WS-SecureConversation。-->
                        
<message establishSecurityContext="true"/>
                    
</security>
                
</binding>
            
</wsHttpBinding>
        
</bindings>
    
</system.serviceModel>
</configuration>


3、客户端
Hello.aspx
<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Hello.aspx.cs"
    Inherits
="InstanceMode_Hello" Title="实例模型(InstanceContextMode)" 
%>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    
<asp:Button ID="btnPerCallMode" runat="server" Text="PerCallMode" 
        onclick
="btnPerCallMode_Click" />
    
&nbsp;
    
<asp:Button ID="btnPerSessionMode" runat="server" Text="PerSessionMode" 
        onclick
="btnPerSessionMode_Click" />
    
&nbsp;
    
<asp:Button ID="btnSingleMode" runat="server" Text="SingleMode" 
        onclick
="btnSingleMode_Click" />
</asp:Content>

Hello.aspx.cs
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class InstanceMode_Hello : System.Web.UI.Page
{
    
protected void Page_Load(object sender, EventArgs e)
    
{

    }


    
protected void btnPerCallMode_Click(object sender, EventArgs e)
    
{

        var proxy 
= new InstanceModeSvc.PerCallMode.PerCallModeClient();

        Page.ClientScript.RegisterStartupScript(
            
this.GetType(),
            
"js",
            
string.Format("alert('计数器:{0}')", proxy.Counter()),
            
true);

        proxy.Close();
    }


    
protected void btnPerSessionMode_Click(object sender, EventArgs e)
    
{
        
if (Session["proxy"== null)
            Session[
"proxy"= new InstanceModeSvc.PerSessionMode.PerSessionModeClient();

        Page.ClientScript.RegisterStartupScript(
            
this.GetType(),
            
"js",
            
string.Format("alert('计数器:{0}')", (Session["proxy"as InstanceModeSvc.PerSessionMode.PerSessionModeClient).Counter()),
            
true);
    }


    
protected void btnSingleMode_Click(object sender, EventArgs e)
    
{
        var proxy 
= new InstanceModeSvc.SingleMode.SingleModeClient();

        Page.ClientScript.RegisterStartupScript(
            
this.GetType(),
            
"js",
            
string.Format("alert('计数器:{0}')", proxy.Counter()),
            
true);

        proxy.Close();
    }

}


Web.config
<?xml version="1.0"?>
<configuration>
    
<system.serviceModel>
        
<client>
            
<!--address - 服务地址-->
            
<!--binding - 通信方式-->
            
<!--contract - 服务契约-->
            
<endpoint address="http://localhost:3502/ServiceHost/InstanceMode/PerCallMode.svc" binding="basicHttpBinding" contract="InstanceModeSvc.PerCallMode.IPerCallMode" />

            
<!--bindingConfiguration - 指定相关的绑定配置-->
            
<endpoint address="http://localhost:3502/ServiceHost/InstanceMode/PerSessionMode.svc" binding="wsHttpBinding" contract="InstanceModeSvc.PerSessionMode.IPerSessionMode" bindingConfiguration="PerSessionModeBindingConfiguration" />

            
<endpoint address="http://localhost:3502/ServiceHost/InstanceMode/SingleMode.svc" binding="basicHttpBinding" contract="InstanceModeSvc.SingleMode.ISingleMode" />
        
</client>
        
<bindings>
            
<wsHttpBinding>
                
<binding name="PerSessionModeBindingConfiguration">
                    
<!--指示是否在通道终结点之间建立 WS-RM (WS-ReliableMessaging) 可靠会话。默认值为 false。-->
                    
<reliableSession enabled="true"/>
                    
<security>
                        
<!--此属性控制安全上下文令牌是否通过客户端与服务之间的 WS-SecureConversation 交换建立。将它设置为 true 要求远程方支持 WS-SecureConversation。-->
                        
<message establishSecurityContext="true"/>
                    
</security>
                
</binding>
            
</wsHttpBinding>
        
</bindings>
    
</system.serviceModel>
</configuration>


运行结果:
单击"btnPerCallMode"按钮,每次单击,计数器都返回1
单击"btnPerSessionMode"按钮,每次单击并且会话相同,计数器会累加
单击"btnSingleMode"按钮,每次单击,计数器都累加


OK
[源码下载]
posted @ 2008-05-08 18:45  webabcd  阅读(10083)  评论(18编辑  收藏  举报