TrackingServices 类

定义

命名空间:

System.Runtime.Remoting.Services

程序集:

mscorlib.dll

提供一种注册、注销和获取跟踪处理程序列表的方法。

public ref class TrackingServices

[System.Runtime.InteropServices.ComVisible(true)]
[System.Security.SecurityCritical]
public class TrackingServices

[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Security.SecurityCritical>]
type TrackingServices = class

Public Class TrackingServices

继承

Object

TrackingServices

属性

ComVisibleAttribute SecurityCriticalAttribute

示例

下面的代码示例演示如何使用 类的 TrackingServices 方法来注册和注销跟踪处理程序。

下面的代码示例演示如何实现跟踪处理程序。

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Services;

// Intercept marshal, unmarshal, and disconnect events for an object.
public class TrackingHandler : ITrackingHandler
{
    // Called when the tracked object is marshaled.

    public void MarshaledObject(Object obj, ObjRef objRef)
    {
        // Notify the user of the marshal event.
        Console.WriteLine("Tracking: An instance of {0} was marshaled.", 
            obj.ToString());

        // Print the channel information.
        if (objRef.ChannelInfo != null)
        {
            // Iterate over ChannelData.
            foreach(object data in objRef.ChannelInfo.ChannelData)
            {
                if (data is ChannelDataStore)
                {
                    // Print the URIs from the ChannelDataStore objects.
                    string[] uris = ((ChannelDataStore)data).ChannelUris;
                    foreach(string uri in uris)
                        Console.WriteLine("ChannelUri: " + uri);
                }
            }
        }

        // Print the envoy information.
        if (objRef.EnvoyInfo != null)
            Console.WriteLine("EnvoyInfo: " + objRef.EnvoyInfo.ToString());

        // Print the type information.
        if (objRef.TypeInfo != null)
        {
            Console.WriteLine("TypeInfo: " + objRef.TypeInfo.ToString());
            Console.WriteLine("TypeName: " + objRef.TypeInfo.TypeName);
        }

        // Print the URI.
        if (objRef.URI != null)
            Console.WriteLine("URI: " + objRef.URI.ToString());
    }

    // Called when the tracked object is unmarshaled.
    public void UnmarshaledObject(Object obj, ObjRef objRef)
    {
        Console.WriteLine("Tracking: An instance of {0} was unmarshaled.", 
            obj.ToString());
    }

    // Called when the tracked object is disconnected.
    public void DisconnectedObject(Object obj)
    {
        Console.WriteLine("Tracking: An instance of {0} was disconnected.", 
            obj.ToString());
    }
}

下面的代码示例演示如何在服务器上实现此类。

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;
using System.Runtime.Remoting.Services;

public class Server
{
    public static void Main(string[] args)
    {
        // Register the TCP channel.
        TcpChannel channel = new TcpChannel(1234);
        ChannelServices.RegisterChannel(channel);

        // Register a tracking handler.
        ITrackingHandler handler1 = new TrackingHandler();
        TrackingServices.RegisterTrackingHandler(handler1);

        // Register a second handler.
        ITrackingHandler handler2 = new TrackingHandler();
        TrackingServices.RegisterTrackingHandler(handler2);

        // Get the number of currently registered handlers.
        Console.WriteLine("Registered tracking handlers: " + 
            TrackingServices.RegisteredHandlers.Length);

        // Remove the tracking handler from the registered handlers.
        TrackingServices.UnregisterTrackingHandler(handler2);
        Console.WriteLine("Registered tracking handlers: " + 
            TrackingServices.RegisteredHandlers.Length);

        // Create and marshal an object for remote invocation.
        RemoteService service = new RemoteService();
        ObjRef obj = RemotingServices.Marshal(service, "TcpService");

        // Wait for the user prompt.
        Console.WriteLine("\r\nPress ENTER to unmarshal the object.");
        Console.ReadLine();

        // Unmarshal the object.
        RemotingServices.Unmarshal(obj);

        // Wait for the user prompt.
        Console.WriteLine("Press ENTER to disconnect the object.");
        Console.ReadLine();

        // Disconnect the object.
        RemotingServices.Disconnect(service);
    }
}

下面的代码示例演示如何在客户端上为前面的代码示例中的服务器实现此类。

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

public class Client
{
    public static void Main(string[] args)
    {
        // Register the TCP channel.
        ChannelServices.RegisterChannel(new TcpChannel());

        // Register the client for the remote object.
        WellKnownClientTypeEntry remoteType = new WellKnownClientTypeEntry(
            typeof(RemoteService),"tcp://localhost:1234/TcpService");
        RemotingConfiguration.RegisterWellKnownClientType(remoteType);

        // Create an instance of the remote object.
        RemoteService service = new RemoteService(); 

        // Invoke a method on the remote object.
        service.Hello("world");
        Console.WriteLine("Hello invoked on server.");
    }
}

下面的代码示例演示服务器和客户端使用的远程对象。

using System;

// Remote object.
public class RemoteService : MarshalByRefObject
{
    private DateTime startTime;

    public RemoteService()
    {
        // Notify the user that the constructor was invoked.
        Console.WriteLine("Constructor invoked.");
        startTime = DateTime.Now;
    }

    ~RemoteService()
    {
        // Notify the user that the finalizer was invoked.
        TimeSpan elapsedTime = 
            new TimeSpan(DateTime.Now.Ticks - startTime.Ticks);
        Console.WriteLine("Finalizer invoked after " + 
            elapsedTime.ToString() + " seconds.");
    }

    public void Hello(string name)
    {
        // Print a simple message.
        Console.WriteLine("Hello, " + name);
    }
}

注解

跟踪处理程序是实现 ITrackingHandler 接口的对象，指示每当远程处理基础结构封送、取消封送或断开对象或代理时，都必须通知它们。 当当前 AppDomain 中的对象或代理被封送、取消封送或断开连接时，将通过远程处理来调用注册TrackingServices的每个对象。

类中的所有 TrackingServices 方法都是静态的，并且对当前 AppDomain中的跟踪处理程序进行操作。

注意

此类需要链接。 如果直接调用方没有基础结构权限，则会引发 SecurityException。 有关详细信息 ，请参阅链接需求 。

构造函数

TrackingServices()

创建 TrackingServices 的实例。

属性

RegisteredHandlers

获取当前 TrackingServices 中目前已注册到 AppDomain 的跟踪处理程序的数组。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
RegisterTrackingHandler(ITrackingHandler)	将新的跟踪处理程序注册到 TrackingServices。
ToString()	返回表示当前对象的字符串。 (继承自 Object)
UnregisterTrackingHandler(ITrackingHandler)	从 TrackingServices 注销指定的跟踪处理程序。

另请参阅

• ITrackingHandler