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Creating a Remoting Server Application
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11. Double-click the Module1.vb or Program.cs file in Solution Explorer, and replace the code in the code window with the following:
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'VB Imports Imports Imports Imports System.Runtime.Remoting System.Runtime.Remoting.Channels System.Runtime.Remoting.Channels.Tcp Server = MyRemotingObject.MSPress.4.Remoting.Server
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Namespace MSPress.4.Remoting.MyServerHost
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Module Module1
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Sub Main() 'Register the TCP channel Dim tcpChannel As New TcpChannel(8005) ChannelServices.RegisterChannel(tcpChannel, False) 'Register the remote object RemotingConfiguration.RegisterWellKnownServiceType( _ (GetType(Server.MyRemoteClass), "MyRemotingObject", _ WellKnownObjectMode.Singleton) End Sub End Module End Namespace //C# using using using using using using
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System;
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System.Collections.Generic;
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System.Text;
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System.Runtime.Remoting;
System.Runtime.Remoting.Channels;
System.Runtime.Remoting.Channels.Tcp;
namespace MSPress.4.Remoting.MyServerHost {
class Program
static void Main(string[] args) { //Register the TCP channel IChannel tcpChannel = new TcpChannel(8005); ChannelServices.RegisterChannel(tcpChannel, false); //Register the remote object RemotingConfiguration.RegisterWellKnownServiceType (typeof(Server.MyRemoteClass), "MyRemotingObject", WellKnownObjectMode.Singleton); }
Lesson 1: Remoting Basics
12. If you re using Visual Basic, right-click the MyServerApplication project in Solu tion Explorer, and click Properties. Click the Startup Object list, and then click Sub Main. 13. Build the solution, and resolve any errors.
Lesson Summary
Remoting is a distributed technology that allows you to pass rich data types from one application domain to another. Remoting is most effective when the client and server both operate on the .NET Framework. The .NET Framework 2.0 provides three types of remote objects. The two serveractivated objects are single call and singleton and which type you use depends on whether you need to maintain state between method calls. You can also cre ate client-activated objects in which the object lifetime is managed entirely on the client. There are four options for hosting your remote object: console application, Windows application, ASP.NET application, and Windows service. The host ing application is responsible for registering the communication channel and remoting object. A proxy object is generated when a remote object is activated. When and how the remote object is activated depends on whether it is a client- or server-activated object. The .NET Framework 2.0 provides a new communication channel, IPC, that can be used when objects are located on the same machine. You can also utilize a TCP channel with a binary formatter or an HTTP channel with a SOAP formatter. The only requirement to make a class remoteable is that it must derive from the MarshalByRefObject class. A hosting application is used to register the communication channel and the remote object with the remoting framework.
4
Creating a Remoting Server Application
Lesson Review
You can use the following questions to test your knowledge of the information in Les son 1, Remoting Basics. The questions are also available on the companion CD if you prefer to review them in electronic form.
NOTE
Answers
Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
1. What type of remote object would be best if you need to maintain state between method calls (Select the best answer.) A. Singleton B. Single call C. Client-activated D. Server-activated 2. What are the main advantages to hosting a remote object through IIS (Select all that apply.) A. Take advantage of built-in features such as session state and caching. B. Able to secure objects using a secure channel in IIS. C. Manual startup of the application is not necessary. D. The object runs very fast through the SOAP formatter. 3. What reference(s) need to be added to your hosting application (Select all that apply.) A. Remote Objects .NET component B. DLL for your remote object C. System.Remoting namespace D. System.Runtime.Remoting namespace
Lesson 2: How to Configure a Server Application Programmatically
Lesson 2: How to Configure a Server Application Programmatically
After this lesson, you will be able to:
Set basic properties for your remote object programmatically. Register a server-activated or a client-activated object programmatically. Set the registration of an object to use a certain version. Register a communication channel for your remote object programmatically.
Estimated lesson time: 30 minutes
In Lesson 1, you learned how a console application could be used as a hosting appli cation for a remote object. Lab 1 walked you through the steps for creating a simple hosting application that registered a TCP channel and a singleton object. Therefore, you have already been exposed to programmatic configuration of your remote objects. This lesson expands on that simple example and shows you other areas of remoting that can be configured programmatically. By setting a reference to the System.Runtime.Remoting namespace, you provide the hosting application with access to the RemotingConfiguration class (see Table 4-3). This class contains properties and methods that can be used to programmatically configure your remoteable object.
Table 4-3
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