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Integrating WCF Services into UDDI based enterprise SOA

, 27 Jan 2009 CPOL 45.1K 676 42
Shows how to integrate WCF services into a UDDI based SOA. This includes the discovery of WCF services at runtime and the runtime configuration of the client.
DynamicWCFFactory.zip
DynamicWCFFactory
DynamicWCFFactory
Behaviours
bin
Debug
Configuration
Properties
DynamicWCFFactory.gpState
DynamicWCFFactory.vsmdi
DynamicWCFFactoryTests
bin
Debug
Properties
Service References
ServiceReference
configuration.svcinfo
configuration91.svcinfo
DynamicWCFFactoryTests.ServiceReference.CompositeType.datasource
Reference.svcmap
Service1.disco
Service1.wsdl
LocalTestRun.testrunconfig
TestResults
UDDIServiceFactory
bin
Debug
Configuration
Lib
Microsoft.Uddi.dll
Properties
WcfService
App_Data
bin
Properties
Service1.svc
WcfService.csproj.user
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Reflection;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;

namespace UDDIServiceFactory.Configuration
{
    /// <summary>
    /// Provides methods to discover and configure various aspects of a WCF client.
    /// </summary>
    public class BindingConfigurationHelper
    {
        #region Members

        /// <summary>
        /// The configuration from the application configuration file.
        /// </summary>
        private System.Configuration.Configuration _appConfig = null;

        /// <summary>
        /// The list of key-value pair, property name and property value, used to configure a <see cref="Binding"/>.
        /// </summary>
        public class BindingProperties : Dictionary<string, IConvertible>
        {
        }

        #endregion

        #region Private methods

        /// <summary>
        /// Sets the properties of the binding by applying the properties from the property list.
        /// </summary>
        /// <param name="binding">The <see cref="System.ServiceModel.Channels.Binding"/> to configure.</param>
        /// <param name="properties">The list of properties to apply</param>
        private void SetBindingProperties(Binding binding, BindingProperties properties)
        {
            CustomBinding customBinding = binding as CustomBinding;

            if (customBinding != null)
            {
                foreach (BindingElement element in customBinding.Elements)
                {
                    Type elementType = element.GetType();
                    foreach (KeyValuePair<string, IConvertible> _keyValue in properties)
                    {
                        // Retrieve the PropertyInfo for the specified property.
                        PropertyInfo _propertyInfo = elementType.GetProperty(_keyValue.Key, BindingFlags.Instance | BindingFlags.Public);
                        if (null != _propertyInfo)
                        {
                            try
                            {
                                _propertyInfo.SetValue(binding, _keyValue.Value, null);
                            }
                            catch
                            {
                                // HACK: the catch block is intentionally doing nothing to
                                // allow the loop to continue processing the property list.
                            }
                        }
                    }
                }
            }

            // Retrieve the type of the binding.
            Type _bindingType = binding.GetType();

            // Process the collection of properties to set.
            foreach (KeyValuePair<string, IConvertible> _keyValue in properties)
            {
                // Retrieve the PropertyInfo for the specified property.
                PropertyInfo _propertyInfo = _bindingType.GetProperty(_keyValue.Key, BindingFlags.Instance | BindingFlags.Public);
                if (null != _propertyInfo)
                {
                    try
                    {
                        _propertyInfo.SetValue(binding, _keyValue.Value, null);
                    }
                    catch
                    {
                        // HACK: the catch block is intentionally doing nothing to
                        // allow the loop to continue processing the property list.
                    }
                }
            }
        }

        /// <summary>
        /// Sets the properties of the  <see cref="System.ServiceModel.Channels.Binding"/> by applying the configuration section from the config file.
        /// </summary>
        /// <param name="binding">The  <see cref="System.ServiceModel.Channels.Binding"/> to configure.</param>
        /// <param name="configurationElement">The configuration element from the config file.</param>
        private void SetBindingProperties(Binding binding, IBindingConfigurationElement configurationElement)
        {
            // Retrieve the type of the binding.
            Type _bindingType = binding.GetType();

            // Process the collection of properties to set.
            foreach (PropertyInfo _configProperty in configurationElement.GetType().GetProperties())
            {
                // Retrieve the PropertyInfo for the specified property.
                PropertyInfo _bindingProperty = _bindingType.GetProperty(_configProperty.Name, BindingFlags.Instance | BindingFlags.Public);
                if (null != _bindingProperty)
                {
                    try
                    {
                        object _value = _configProperty.GetValue(configurationElement, null);
                        _bindingProperty.SetValue(binding, _value, null);
                    }
                    catch
                    {
                        // HACK: the catch block is intentionally doing nothing to
                        // allow the loop to continue processing the property list.
                    }
                }
            }
        }

        #endregion

        #region Public methods

        /// <summary>
        /// Configures a new  <see cref="System.ServiceModel.Channels.Binding"/> using the key-value pairs from the <see cref="BindingProperties"/> list.
        /// </summary>
        /// <typeparam name="TBinding">The type of  <see cref="System.ServiceModel.Channels.Binding"/> to initialize and configure.</typeparam>
        /// <param name="bindingName">The name to be given to the new  <see cref="System.ServiceModel.Channels.Binding"/>.</param>
        /// <param name="properties">The key-value pair of properties used to configure the new  <see cref="System.ServiceModel.Channels.Binding"/>.</param>
        /// <returns>A new <see cref="System.ServiceModel.Channels.Binding"/> configured.</returns>
        public TBinding ConfigureClientBinding<TBinding>(string bindingName, BindingProperties properties)
            where TBinding : Binding, new()
        {
            // Initialize a new instance of the binding class.
            TBinding _binding = new TBinding();
            _binding.Name = bindingName;

            // Set the properties of the new binding.
            SetBindingProperties(_binding, properties);

            // Return the binding.
            return _binding;
        }

        /// <summary>
        /// Configures a new <see cref="System.ServiceModel.Channels.Binding"/> by retrieving the matching <see cref="IBindingConfigurationElement"/> from the configuration file.
        /// </summary>
        /// <typeparam name="TConfiguration">The type of the <see cref="IBindingConfigurationElement"/> element to retrieve from the config file.</typeparam>
        /// <typeparam name="TBinding">The type of <see cref="System.ServiceModel.Channels.Binding"/> to initialize and configure.</typeparam>
        /// <param name="bindingName">The name to be given to the new <see cref="System.ServiceModel.Channels.Binding"/>.</param>
        /// <returns>A new <see cref="System.ServiceModel.Channels.Binding"/> configured.</returns>
        public TBinding ConfigureClientBinding<TConfiguration, TBinding>(string bindingName)
            where TConfiguration : class, new()
            where TBinding : Binding, new()
        {
            // Initialize a new instance of the binding class.
            TBinding _binding = new TBinding();
            _binding.Name = bindingName;

            // Retrieve the configured binding element from the configuration file.
            TConfiguration _configurationElement = GetBindingTypeByName<TConfiguration>(bindingName);

            // Set the properties of the binding.
            SetBindingProperties(_binding, (IBindingConfigurationElement)_configurationElement);

            // Return the binding.
            return _binding;
        }

        /// <summary>
        /// Configures a new <see cref="System.ServiceModel.Channels.Binding"/> by retrieving the matching <see cref="IBindingConfigurationElement"/> from the configuration file.
        /// </summary>
        /// <typeparam name="TConfiguration">The type of the <see cref="IBindingConfigurationElement"/> element to retrieve from the config file.</typeparam>
        /// <param name="binding">The <see cref="System.ServiceModel.Channels.Binding"/> to configure.</param>
        public void ConfigureClientBinding<TConfiguration>(Binding binding)
            where TConfiguration : class, new()
        {
            // Retrieve the configured binding element from the configuration file.
            TConfiguration _configurationElement = GetBindingTypeByName<TConfiguration>(binding.Name);

            // Set the properties of the binding.
            SetBindingProperties(binding, (IBindingConfigurationElement)_configurationElement);
        }

        /// <summary>
        /// Configures the given <see cref="System.ServiceModel.Channels.Binding"/> using the key-value pairs from the <see cref="BindingProperties"/> list.
        /// </summary>
        /// <param name="binding">The  <see cref="System.ServiceModel.Channels.Binding"/> to configure.</param>
        /// <param name="properties">The key-value pair of properties used to configure the new <see cref="System.ServiceModel.Channels.Binding"/>.</param>
        public void ConfigureClientBinding(Binding binding, BindingProperties properties)
        {
            // Set the properties of the new binding.
            SetBindingProperties(binding, properties);
        }

        /// <summary>
        /// Returns the requested <see cref="IBindingConfigurationElement"/> from the binding configuration section
        /// </summary>
        /// <typeparam name="T">The type of the <see cref="IBindingConfigurationElement"/> requested.</typeparam>
        /// <param name="bindingName">The name of the new <see cref="System.ServiceModel.Channels.Binding"/>.</param>
        /// <returns>Either the given <see cref="IBindingConfigurationElement"/> or a new <see cref="System.ServiceModel.Channels.Binding"/> for the requested T type.
        /// <remarks>
        /// The new <see cref="System.ServiceModel.Channels.Binding"/> element of type T is initialized using the default WCF configuration parameters.
        /// </remarks>
        /// </returns>
        private T GetBindingTypeByName<T>(string bindingName) where T : class, new()
        {
            // Retrieve the ServiceModel configuration section group.
            ServiceModelSectionGroup _serviceModel = ServiceModelSectionGroup.GetSectionGroup(_appConfig);
            BindingsSection _bindings = _serviceModel.Bindings;

            // Browse through all configuration groups.
            foreach (ExtensionElement _bindingExtension in _serviceModel.Extensions.BindingExtensions)
            {
                // Selectively retrieve the requested configuration sections.
                foreach (IBindingConfigurationElement _element in _bindings[_bindingExtension.Name].ConfiguredBindings)
                {
                    // When the type and the name of the binding matches, 
                    if ((_element.GetType() == typeof(T)) && (_element.Name == bindingName))
                    {
                        // return the result to the caller.
                        return (T)_element;
                    }
                }
            }
            // No binding found.
            return default(T);
        }

        #endregion

        #region Ctor

        /// <summary>
        /// Initializes a new instance of the BindingConfigurator class.
        /// <remarks>
        /// The configuration file is opened for read-only access.
        /// </remarks>
        /// </summary>
        public BindingConfigurationHelper()
        {
            // Get the application configuration file.
            _appConfig = ConfigurationAgent.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal);
        }

        #endregion
    }
}

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About the Author

Tobias Manthey
Architect
Germany Germany
being IT-Engineer since 1995 I am freelancing since then. From networks to programming, from system administration to DBA, from AIX to Windows I offer a wide range of IT-Skill's without considering me the ultimate expert in each area.
I try to avoid complexity wherever I can and so my philosophy is to strictly follow KISS principles.

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