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Merge pull request #99 from dennisdoomen/Statistics
Introduce mechanism for tracking statistics over HTTP
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| <?xml version="1.0"?> | ||
| <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd"> | ||
| <metadata> | ||
| <id>LiquidProjections.Owin</id> | ||
| <version>0.0.0.0</version> | ||
| <authors>Dennis Doomen</authors> | ||
| <owners>Dennis Doomen</owners> | ||
| <projectUrl>https://github.com/liquidprojections/LiquidProjections</projectUrl> | ||
| <requireLicenseAcceptance>false</requireLicenseAcceptance> | ||
| <description>Provides OWIN Middleware to access LiquidProjection over HTTP.</description> | ||
| <tags>event-sourcing; projections; ddd; owin; webapi</tags> | ||
| <frameworkAssemblies /> | ||
| <releaseNotes/> | ||
| <dependencies> | ||
| <group> | ||
| <dependency id="LiquidProjections" version="$nugetversion$"/> | ||
| <dependency id="Owin" version="1.0.0.0"/> | ||
| </group> | ||
| </dependencies> | ||
| </metadata> | ||
| <files> | ||
| <file src="..\..\Artifacts\LiquidProjections.Owin.dll" target="lib\net452" /> | ||
| <file src="..\..\Artifacts\LiquidProjections.Owin.pdb" target="lib\net452" /> | ||
| <file src="..\..\Artifacts\LiquidProjections.Owin.xml" target="lib\net452" /> | ||
| </files> | ||
| </package> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| using System; | ||
| using System.Collections.Concurrent; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Reflection; | ||
| using LiquidProjections.Statistics; | ||
| using Nancy; | ||
| using Nancy.Bootstrapper; | ||
| using Nancy.Configuration; | ||
| using Nancy.Extensions; | ||
| using Nancy.Linker; | ||
| using Nancy.Metadata.Modules; | ||
| using Nancy.Routing; | ||
| using Nancy.Swagger; | ||
| using Nancy.Swagger.Modules; | ||
| using Nancy.Swagger.Services; | ||
| using Nancy.TinyIoc; | ||
|
|
||
| namespace LiquidProjections.Owin | ||
| { | ||
| internal class CustomNancyBootstrapper : DefaultNancyBootstrapper | ||
| { | ||
| private readonly ProjectionStats stats; | ||
|
|
||
| public CustomNancyBootstrapper(ProjectionStats stats) | ||
| { | ||
| this.stats = stats; | ||
| } | ||
|
|
||
| protected override void ApplicationStartup(TinyIoCContainer container, IPipelines pipelines) | ||
| { | ||
| base.ApplicationStartup(container, pipelines); | ||
|
|
||
| SwaggerMetadataProvider.SetInfo( | ||
| "LiquidProjections", | ||
| Assembly.GetExecutingAssembly().GetName().Version.ToString(), | ||
| "Provides statistics about running projectors" | ||
| ); | ||
| } | ||
|
|
||
| #if DEBUG | ||
|
|
||
| public override void Configure(INancyEnvironment environment) | ||
| { | ||
| environment.Tracing(enabled: false, displayErrorTraces: true); | ||
| base.Configure(environment); | ||
| } | ||
| #endif | ||
|
|
||
| protected override IAssemblyCatalog AssemblyCatalog => new StaticAssemblyCatalog(); | ||
|
|
||
| protected override ITypeCatalog TypeCatalog => new InternalTypeCatalog(AssemblyCatalog); | ||
|
|
||
| protected override void ConfigureApplicationContainer(TinyIoCContainer container) | ||
| { | ||
| container.Register<IResourceLinker>((x, overloads) => | ||
| new ResourceLinker(x.Resolve<IRouteCacheProvider>(), | ||
| x.Resolve<IRouteSegmentExtractor>(), x.Resolve<IUriFilter>())); | ||
|
|
||
| container.Register<IRegistrations, Registration>("LinkerRegistrations"); | ||
| container.Register<IRegistrations, SwaggerRegistrations>("SwaggerRegistrations"); | ||
| container.Register(stats); | ||
| } | ||
|
|
||
| protected override IEnumerable<ModuleRegistration> Modules => | ||
| new[] | ||
| { | ||
| new ModuleRegistration(typeof(SwaggerModule)), | ||
| new ModuleRegistration(typeof(StatisticsModule)) | ||
| }; | ||
| } | ||
|
|
||
| internal class StaticAssemblyCatalog : IAssemblyCatalog | ||
| { | ||
| public IReadOnlyCollection<Assembly> GetAssemblies() | ||
| { | ||
| return new[] | ||
| { | ||
| typeof(MetadataModuleRegistrations).Assembly, | ||
| typeof(CustomNancyBootstrapper).Assembly, | ||
| typeof(DefaultNancyBootstrapper).Assembly | ||
| }.Distinct().ToArray(); | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Implementation of the <see cref="T:Nancy.ITypeCatalog" /> interface that will find internal types as well. | ||
| /// </summary> | ||
| internal class InternalTypeCatalog : ITypeCatalog | ||
| { | ||
| private readonly IAssemblyCatalog assemblyCatalog; | ||
| private readonly ConcurrentDictionary<Type, IReadOnlyCollection<Type>> cache; | ||
|
|
||
| /// <summary> | ||
| /// Initializes a new instance of the <see cref="T:Nancy.DefaultTypeCatalog" /> class. | ||
| /// </summary> | ||
| /// <param name="assemblyCatalog">An <see cref="T:Nancy.IAssemblyCatalog" /> instanced, used to get the assemblies that types should be resolved from.</param> | ||
| public InternalTypeCatalog(IAssemblyCatalog assemblyCatalog) | ||
| { | ||
| this.assemblyCatalog = assemblyCatalog; | ||
| cache = new ConcurrentDictionary<Type, IReadOnlyCollection<Type>>(); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// Gets all types that are assignable to the provided <paramref name="type" />. | ||
| /// </summary> | ||
| /// <param name="type">The <see cref="T:System.Type" /> that returned types should be assignable to.</param> | ||
| /// <param name="strategy">A <see cref="T:Nancy.TypeResolveStrategy" /> that should be used when retrieving types.</param> | ||
| /// <returns>An <see cref="T:System.Collections.Generic.IReadOnlyCollection`1" /> of <see cref="T:System.Type" /> instances.</returns> | ||
| public IReadOnlyCollection<Type> GetTypesAssignableTo(Type type, TypeResolveStrategy strategy) | ||
| { | ||
| return cache.GetOrAdd(type, t => GetTypesAssignableTo(type)) | ||
| .Where(strategy.Invoke).ToArray(); | ||
| } | ||
|
|
||
| private IReadOnlyCollection<Type> GetTypesAssignableTo(Type type) | ||
| { | ||
| return assemblyCatalog.GetAssemblies() | ||
| .SelectMany(assembly => assembly.SafeGetTypes()) | ||
| .Where(type.IsAssignableFrom) | ||
| .Where(t => !t.GetTypeInfo().IsAbstract).ToArray(); | ||
| } | ||
| } | ||
| } |
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