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Measuring and Monitoring WCF Web Service Performance

, 4 Oct 2012 GPL3
Using ServiceMon to obtain performance statistics for web services
ServiceMonExtensionExample-noexe.zip
ServiceMonExtensionExample
ServiceMonExtensions
Properties
Service References
TempConvertWebService
configuration.svcinfo
configuration91.svcinfo
Reference.svcmap
tempconvert.wsdl
Tests
Properties
ServiceMonExtensionExample.zip
bin
Kaleida.ServiceMonitor.Framework.dll
configuration.svcinfo
configuration91.svcinfo
Reference.svcmap
tempconvert.wsdl
ServiceMon_v1.0.0_Source-noexe.zip
ServiceMon v1.0.0 Source
BuildTools
antlr-3.2.jar
nUnit
Failure.jpg
Ignored.jpg
NUnitTests.nunit
Success.jpg
tempfile.tmp
Everything.build
Kaleida.ServiceMonitor.CodePlexUploader
Kaleida.ServiceMonitor.Framework
Properties
Responses
Kaleida.ServiceMonitor.Model
Email
Layout
Parsing
ScriptGrammar.g
Properties
Runtime
ScriptDirectives
Statistics
StructuredSource
Kaleida.ServiceMonitor.Operations
PreparedRequests
Properties
ResponseHandlers
Kaleida.ServiceMonitor.UI
Application.ico
Icons
Application.ico
Error.ico
Running.ico
Stopped.ico
Kaleida.ProductBuilder.ServiceMonitor.csproj.DotSettings
Kaleida.ProductBuilder.ServiceMonitor.csproj.DotSettings.user
Kaleida.ProductBuilder.ServiceMonitor.csproj.ReSharper
NotificationPanels
Properties
Settings.settings
Scripts
Introductory Examples.mscr
More Examples.mscr
Kaleida.ServiceMonitor.UnitTests
Framework
Model
Email
Layout
Parsing
Runtime
Statistics
Operations
Scripts
Setup
DialogBackround.bmp
DialogBackround.pdn
DialogTopBanner.bmp
GPLv3License.rtf
Product.wxs
Setup.wixproj
ServiceMon_v1.0.0_Source.zip
bin
Antlr3.Runtime.dll
CodePlex.WebServices.Client.dll
JetBrains.Annotations.dll
log4net.dll
antlr-3.2.jar
Failure.jpg
fit.dll
Ignored.jpg
loadtest-assembly.dll
mock-assembly.dll
nonamespace-assembly.dll
notestfixtures-assembly.dll
nunit-console-runner.dll
nunit-console-x86.exe
nunit-console.exe
nunit-console.tests.dll
nunit-gui-runner.dll
nunit-gui.exe
nunit-gui.tests.dll
nunit-test-server.dll
nunit-x86.exe
nunit.core.dll
nunit.core.extensions.dll
nunit.core.interfaces.dll
nunit.core.tests.dll
nunit.exe
nunit.extensions.tests.dll
nunit.fixtures.dll
nunit.fixtures.tests.dll
nunit.framework.dll
nunit.framework.extensions.dll
nunit.framework.tests.dll
nunit.mocks.dll
nunit.mocks.tests.dll
nunit.testutilities.dll
nunit.uikit.dll
nunit.uikit.tests.dll
nunit.util.dll
nunit.util.tests.dll
NUnitTests.nunit
runFile.exe
Success.jpg
tempfile.tmp
test-assembly.dll
test-utilities.dll
timing-tests.dll
WixFileVersionExtension.dll
COPYING
Everything.build
Properties
ScriptGrammar.g
Application.ico
Application.ico
Error.ico
Running.ico
Stopped.ico
Kaleida.ProductBuilder.ServiceMonitor.csproj.DotSettings
Kaleida.ProductBuilder.ServiceMonitor.csproj.DotSettings.user
Kaleida.ProductBuilder.ServiceMonitor.csproj.ReSharper
Settings.settings
Introductory Examples.mscr
More Examples.mscr
DialogBackround.bmp
DialogBackround.pdn
DialogTopBanner.bmp
GPLv3License.rtf
Product.wxs
Setup.wixproj
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using Kaleida.ServiceMonitor.Framework;
using System.Linq;

namespace Kaleida.ServiceMonitor.Model.Runtime
{
    public class ReflectionOperationFactory : IPreparedRequestFactory, IResponseHandlerFactory
    {
        private readonly List<Assembly> searchAssemblies;

        public ReflectionOperationFactory(IEnumerable<Assembly> searchAssemblies)
        {
            this.searchAssemblies = searchAssemblies.ToList();
        }

        PreparedRequest IPreparedRequestFactory.Build(string name, IList<string> arguments)
        {
            var type = GetOperationType(name, arguments, typeof (PreparedRequest));
            return (PreparedRequest) CreateInstance(type, arguments);
        }

        ResponseHandler IResponseHandlerFactory.Build(string name, IList<string> arguments)
        {
            var type = GetOperationType(name, arguments, typeof(ResponseHandler));
            return (ResponseHandler)CreateInstance(type, arguments);
        }

        public RuntimeEnvironment GetRuntimeEnvironment()
        {
            return new RuntimeEnvironment(GetOperationTypes(typeof (PreparedRequest)), GetOperationTypes(typeof (ResponseHandler)));
        }

        private IList<Type> GetOperationTypes(Type baseType)
        {
            var searchTypes = searchAssemblies.SelectMany(i => i.GetTypes()).ToList();

            var withCorrectBase = new HashSet<Type>(searchTypes.Where(i => i.DerivesFrom(baseType)));
            var withPublicVisibility = new HashSet<Type>(searchTypes.Where(i => i.IsVisible));
            var withMatchingConstructor = new HashSet<Type>(searchTypes.Where(i => i.HasPublicFullyStringParameterisedConstructor()));

            return withCorrectBase.Intersect(withPublicVisibility).Intersect(withMatchingConstructor).ToList();
        }

        private Type GetOperationType(string name, IEnumerable<string> arguments, Type baseType)
        {
            if(!searchAssemblies.Any())
                throw new InvalidOperationException(string.Format("Cannot find a {0} implementation for '{1}'. There are no operation definition assemblies available", baseType.Name, name));

            var searchTypes = searchAssemblies.SelectMany(i => i.GetTypes()).ToList();

            var withMatchingName = new HashSet<Type>(searchTypes.Where(i => i.Name == name.ToPascalCase()));
            var withCorrectBase = new HashSet<Type>(searchTypes.Where(i => i.DerivesFrom(baseType)));
            var withPublicVisibility = new HashSet<Type>(searchTypes.Where(i => i.IsVisible));
            var withMatchingConstructor = new HashSet<Type>(searchTypes.Where(i => i.HasPublicFullyStringParameterisedConstructor(arguments.Count())));

            var candidateTypes = withMatchingName.Intersect(withCorrectBase).Intersect(withPublicVisibility).Intersect(withMatchingConstructor);

            var type = candidateTypes.FirstOrDefault();

            if (type == null)
            {
                var message = new StringBuilder();
                message.AppendFormat("Cannot find a {0} implementation for '{1}' within these search assemblies:\r\n", baseType.Name, name);
                message.Append(searchAssemblies.Select(i => i.FullName).ToBulletedList());
                message.Append("\r\n\r\n");
                message.AppendFormat("The .NET implementation must be named '{0}', ", name.ToPascalCase());
                message.AppendFormat("derive from {0}, ", baseType.Name);
                message.AppendFormat("have public visibility and a public constructor containing all string parameters.\r\n\r\n");

                if (withMatchingName.Any())
                {
                    message.AppendFormat("The following type(s) have the right name but are not quite right:\r\n");
                    message.Append(withMatchingName.Select(i => GetCriteriaAnalysis(i, name, arguments.ToList(), baseType)).Join("\r\n"));
                }

                throw new InvalidOperationException(message.ToString());
            }
            return type;
        }

        internal static string GetCriteriaAnalysis(Type type, string name, IList<string> arguments, Type baseType)
        {
            var message = new StringBuilder();

            message.AppendFormat("  {0}:\r\n", type.FullName);
            message.AppendFormat("    Has correct name? {0}\r\n", (type.Name == name.ToPascalCase()).ToBallotBox());
            message.AppendFormat("    Derives from {0}? {1}\r\n", baseType, type.DerivesFrom(baseType).ToBallotBox());
            message.AppendFormat("    Publicly visibile? {0}\r\n", type.IsVisible.ToBallotBox());
            message.AppendFormat("    Public constructor with {0} string parameter(s)? {1}\r\n", arguments.Count(), type.HasPublicFullyStringParameterisedConstructor(arguments.Count()).ToBallotBox());

            return message.ToString();
        }

        private static object CreateInstance(Type type, IEnumerable<string> arguments)
        {
            try
            {

                return Activator.CreateInstance(type, arguments.Select(i => (object)i).ToArray());
            }
            catch (TargetInvocationException exception)
            {
                throw exception.InnerException;
            }
        }
    }
}

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This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

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About the Author

Stuart Wheelwright
Architect BlackJet Software Ltd
United Kingdom United Kingdom
Stuart Wheelwright is the Principal Architect and Software Developer at BlackJet Software Ltd.
 
He has over 16 years commercial experience producing robust, maintainable, web-based solutions and bespoke systems for Microsoft platforms.
 
His latest project is Shopping UK, an elegantly simple shopping list for iPhone.
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Web01 | 2.8.141216.1 | Last Updated 4 Oct 2012
Article Copyright 2012 by Stuart Wheelwright
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