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Dynamic Binding Using the Factory Pattern

, 1 Nov 2009
Using the Factory design pattern to hide dynamic binding and use configuration strings to determine which classes should be instantiated.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Wycoff.Activation;
using Wycoff.Activation.WcfHttp;
using Wycoff.Shared;

namespace Wycoff.Client
{
    /// <summary>
    /// Main program class
    /// </summary>
    class Program
    {
        /// <summary>
        /// Static Main for console test application
        /// </summary>
        /// <param name="args">
        /// Not used at this time
        /// </param>
        static void Main(string[] args)
        {
            Console.WriteLine("Client Application Starting");

            // In process activation of TheInProcessService using the default
            // contructor
            ITheService theClass = Locator.Activate(typeof(ITheService), 
                "local://localhost/Wycoff.Client/Wycoff.Client.TheInProcessService") 
                as ITheService;
            string s = theClass.Hello("Rick");

            // In process activation of TheInProcessService using the one
            // string constructor
            theClass = Locator.Activate(typeof(ITheService), 
                "local://localhost/Wycoff.Client/Wycoff.Client.TheInProcessService?Hola") 
                as ITheService;
            s = theClass.Hello("Rick");

            // Remote activation (.NET remoting) with initialization
            theClass = Locator.Activate(typeof(ITheService), 
                "tcp://localhost:9000/TheService?xyz") 
                as ITheService;
            s = theClass.Hello("Rick");

            // Register the WcfHttpActivator
            Locator.RegisterActivator("HttpTheService", 
                new WcfHttpActivator<ITheService>());
            // Remote activation using the WcfHttpActivator
            theClass = Locator.Activate(typeof(ITheService), 
                "HttpTheService://localhost:8080/RemoteTheService") 
                as ITheService;
            s = theClass.Hello("Rick");

            Console.WriteLine("Client Application Ending");
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Richard (Rick) Wycoff
Software Developer (Senior)
United States United States
Rick's software passion is developing "invisible” software components, the kind that no one ever thinks about because they just do what they are supposed to do. He believes in standards, design patterns, and designing components for extensibility and reuse.

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