private async Task HandleReceivedRequest(Request request)
{
RequestReceived?.Invoke(this, request);
Response response = null;
foreach (var handler in RequestPipeline.GetHandlers())
{
var resp = await handler.Invoke(request);
if (resp != null)
{
response = resp;
break;
}
}
if (response != null)
{
// Only if response was handled
// Remember, notifications do not get a reply
await _transportLock.WaitAsync();
await DataWriter.WriteLineAsync(response.ToString());
await DataWriter.FlushAsync();
_transportLock.Release();
}
}
public SimpleHost(ServerListener server, RequestPipeline pipeline)
{
Server = server;
Pipeline = pipeline;
Handler = Pipeline.Build();
Server.ProcessRequest += Server_ProcessRequest;
}
public async void When_RequestPipeline_ExecPipeLine_With_MoreThanOne_Handler()
{
Mock <IHandlersServiceProvider> providerMock = new Mock <IHandlersServiceProvider>();
TestRequest1 testRequest1 = new TestRequest1();
testRequest1.text = "1";
TestRequest2 testRequest2 = new TestRequest2();
testRequest2.text = "1";
providerMock.Setup(o => o.GetHandlers(testRequest1)).Returns(new List <IBaseHandler> {
new HandlersSample1()
});
providerMock.Setup(o => o.GetHandlers(testRequest2)).Returns(new List <IBaseHandler> {
new HandlersSample2()
});
RequestPipeline provider = new RequestPipeline(providerMock.Object);
var res = await provider.ExecPipeline(testRequest1);
var res2 = await provider.ExecPipeline(testRequest2);
res.GetResponse <TestResponse1>().ShouldNotBeNull();
res.ResponseHasErros().ShouldBeFalse();
((TestResponse1)res.FirstOrDefault()).text.ShouldBe(testRequest1.text);
res.Count.ShouldBe(1);
res2.GetResponse <TestResponse2>().ShouldNotBeNull();
res2.ResponseHasErros().ShouldBeFalse();
((TestResponse2)res2.FirstOrDefault()).text.ShouldBe(testRequest2.text);
res2.Count.ShouldBe(1);
}
private static void MixinAndInterceptorExecution()
{
Console.Out.WriteLine( " o0o Within security checking o0o " );
// For the sake of readability we're keep the aspect code here:
String contents =
" import AspectSharp.Example.Aop.Interceptors " +
" import AspectSharp.Example.Aop.Mixins " +
" " +
" aspect sample for [ AspectSharp.Example.ContentProviders ] " +
" include SecurityMixin " +
" " +
" pointcut method(* RetrieveContent())" +
" advice(SecurityCheckInterceptor)" +
" end" +
" " +
" end ";
AspectLanguageEngineBuilder builder = new AspectLanguageEngineBuilder( contents );
AspectEngine engine = builder.Build();
RequestPipeline pipeline = new RequestPipeline();
pipeline.Context["username"] = "******";
pipeline.AddContentProvider( engine.WrapClass( typeof(StaticContentProvider) ) as IContentProvider );
pipeline.AddContentProvider( engine.WrapClass( typeof(DynamicContentProvider) ) as IContentProvider );
pipeline.View = new PlainTextView();
pipeline.ProcessRequest( Console.Out );
Console.Out.WriteLine();
}
private RequestPipeline CreatePipeline()
{
this._settings = TestClient.GetClient(c => c.PrettyJson(), this._cluster.Node.Port, createPool: u => new SniffingConnectionPool(new[] { u })).ConnectionSettings;
var pipeline = new RequestPipeline(this._settings, DateTimeProvider.Default, new MemoryStreamFactory(),
new SearchRequestParameters());
return(pipeline);
}
private RequestPipeline CreatePipeline()
{
var uri = TestConnectionSettings.CreateUri(this._cluster.Nodes.First().Port ?? 9200);
this._settings = new ConnectionSettings(new SniffingConnectionPool(new[] { uri }));
var pipeline = new RequestPipeline(this._settings, DateTimeProvider.Default, new RecyclableMemoryStreamFactory(), new SearchRequestParameters());
return(pipeline);
}
public SimpleHost Build()
{
var serverBuilder = new ServerListenerBuilder();
if (_pipeline == null)
{
_pipeline = new RequestPipeline(DefaultMiddlewares.NotFoundMiddleware);
}
_serverBuilder(serverBuilder);
return(new SimpleHost(serverBuilder.Build(), _pipeline));
}
private static void SimpleExecution()
{
Console.Out.WriteLine( " o0o First execution o0o " );
RequestPipeline pipeline = new RequestPipeline();
pipeline.Context["username"] = "******";
pipeline.AddContentProvider( new StaticContentProvider() );
pipeline.AddContentProvider( new DynamicContentProvider() );
pipeline.View = new PlainTextView();
pipeline.ProcessRequest( Console.Out );
Console.Out.WriteLine();
}
public async Task ShouldCreateHttpContextUsingFactory()
{
// Given
HttpContext context = null;
var factory = new FakeHttpContextFactory(req => context = new HttpContext(req));
var pipeline = new RequestPipeline(factory);
var request = new HttpRequest("HTTP/1.1", "GET", Url.Blank, new Dictionary<string, string[]>(), Stream.Null, null, string.Empty);
// When
var actual = await pipeline.HandleRequest(request, CancellationToken.None);
Assert.Same(context, actual);
}
public async Task Execute_GivenThatNoInteractorIsInjected_ThrowsAnException()
{
// Arrange
var testSubject = new RequestPipeline <TestRequest, OperationResult>(
interactor: null,
logger: this.logger,
authorizer: this.authorizer,
validator: this.validator);
var request = this.fixture.Create <TestRequest>();
// Act Assert
await Assert.ThrowsAsync <InvalidOperationException>(async() => await testSubject.Execute(request));
}
public RequestPipelineTests()
{
this.interactor = Substitute.For <IInteractor <TestRequest, OperationResult> >();
this.interactor.Handle(Arg.Any <TestRequest>()).Returns(OperationResultCreator.Success());
this.logger = Substitute.For <ILogger <RequestPipeline <TestRequest, OperationResult> > >();
this.authorizer = Substitute.For <IAuthorizer <TestRequest> >();
this.authorizer.Authorize(Arg.Any <TestRequest>()).Returns(OperationResultCreator.Success());
this.validator = Substitute.For <IValidator <TestRequest> >();
this.validator.Validate(Arg.Any <TestRequest>()).Returns(OperationResultCreator.Success());
this.sut = new RequestPipeline <TestRequest, OperationResult>(this.interactor, this.logger, this.authorizer, this.validator);
}
public void RequestPipeline()
{
// hide
var settings = TestClient.DefaultInMemoryClient.ConnectionSettings;
/** When calling `Request()` or `RequestAsync()` on an `ITransport`,
* the whole coordination of the request is deferred to a new instance in a `using` block.
*/
var pipeline = new RequestPipeline <IConnectionSettingsValues>(
settings,
DateTimeProvider.Default,
new RecyclableMemoryStreamFactory(),
new SearchRequestParameters()
);
pipeline.GetType().Should().Implement <IDisposable>();
/** An `ITransport` does not instantiate a `RequestPipeline` directly; it uses a pluggable `IRequestPipelineFactory`
* to create them
*/
var requestPipelineFactory = new RequestPipelineFactory <IConnectionSettingsValues>();
var requestPipeline = requestPipelineFactory.Create(
settings,
DateTimeProvider.Default, //<1> An <<date-time-providers,`IDateTimeProvider`>> implementation
new RecyclableMemoryStreamFactory(),
new SearchRequestParameters()
);
requestPipeline.Should().BeOfType <RequestPipeline <IConnectionSettingsValues> >();
requestPipeline.GetType().Should().Implement <IDisposable>();
/**
* You can pass your own `IRequestPipeline` implementation to the transport when instantiating a client,
* allowing you to have requests executed in your own custom request pipeline
*/
var transport = new Transport <IConnectionSettingsValues>(
settings,
requestPipelineFactory,
DateTimeProvider.Default,
new RecyclableMemoryStreamFactory()
);
var client = new ElasticClient(transport);
}
public async void When_RequestPipeline_ExecPipeLine_With_MoreThanOne_PreHandler_Error()
{
Mock <IHandlersServiceProvider> providerMock = new Mock <IHandlersServiceProvider>();
TestRequest1 testRequest1 = new TestRequest1();
testRequest1.text = "1";
providerMock.Setup(o => o.GetHandlers(testRequest1)).Returns(new List <IBaseHandler> {
new HandlersSample1(), new HandlersSampleWithError()
});
RequestPipeline provider = new RequestPipeline(providerMock.Object);
var res = await provider.ExecPipeline(testRequest1);
res.FirstOrDefault().ShouldNotBeNull();
res.Count.ShouldBe(1);
res.Any(o => o.AnyError).ShouldBeTrue();
}
public async void When_RequestPipeline_ExecPipeLine_With_MoreThanOne_Execpetion()
{
Mock <IHandlersServiceProvider> providerMock = new Mock <IHandlersServiceProvider>();
TestRequest1 testRequest1 = new TestRequest1();
testRequest1.text = "1";
providerMock.Setup(o => o.GetHandlers(testRequest1)).Returns(new List <IBaseHandler> {
new HandlersSample1(), new HandlersSampleWithErrorExecption()
});
RequestPipeline provider = new RequestPipeline(providerMock.Object);
var res = await provider.ExecPipeline(testRequest1);
res.ResponseHasErros().ShouldBeTrue();
res.GetErrorResponse <DefaultResponseError>().ShouldNotBeNull();
}
public void RequestPipeline()
{
var settings = TestClient.CreateSettings();
/** When calling Request(Async) on Transport the whole coordination of the request is deferred to a new instance in a `using` block. */
var pipeline = new RequestPipeline(settings, DateTimeProvider.Default, new MemoryStreamFactory(), new SearchRequestParameters());
pipeline.GetType().Should().Implement<IDisposable>();
/** However the transport does not instantiate RequestPipeline directly, it uses a pluggable `IRequestPipelineFactory`*/
var requestPipelineFactory = new RequestPipelineFactory();
var requestPipeline = requestPipelineFactory.Create(settings, DateTimeProvider.Default, new MemoryStreamFactory(), new SearchRequestParameters());
requestPipeline.Should().BeOfType<RequestPipeline>();
requestPipeline.GetType().Should().Implement<IDisposable>();
/** which can be passed to the transport when instantiating a client */
var transport = new Transport<ConnectionSettings>(settings, requestPipelineFactory, DateTimeProvider.Default, new MemoryStreamFactory());
/** this allows you to have requests executed on your own custom request pipeline */
}
public static Response <Unit> Dispatch <TRequest>(TRequest command) where TRequest : IRequest <Unit>, ICorrelated
{
var subscriptions = new Lazy <IReadOnlyCollection <Subscription> >(() => new List <Subscription>(GetSubscriptions()).AsReadOnly());
return(RequestPipeline <TRequest, Unit> .DispatchThroughPipeline(
command,
dispatcher : input =>
{
var @event = new Event
{
Notification = new Placed <TRequest> {
Command = input
},
EventId = new NoEventId()
};
PostBox <TQueueUowProvider> .Drop(() => subscriptions.Value)(new[] { @event });
return Enumerable.Empty <Unit>();
}));
}
public void RequestPipeline()
{
var settings = TestClient.CreateSettings();
/** When calling Request(Async) on Transport the whole coordination of the request is deferred to a new instance in a `using` block. */
var pipeline = new RequestPipeline(settings, DateTimeProvider.Default, new MemoryStreamFactory(), new SearchRequestParameters());
pipeline.GetType().Should().Implement <IDisposable>();
/** However the transport does not instantiate RequestPipeline directly, it uses a pluggable `IRequestPipelineFactory`*/
var requestPipelineFactory = new RequestPipelineFactory();
var requestPipeline = requestPipelineFactory.Create(settings, DateTimeProvider.Default, new MemoryStreamFactory(), new SearchRequestParameters());
requestPipeline.Should().BeOfType <RequestPipeline>();
requestPipeline.GetType().Should().Implement <IDisposable>();
/** which can be passed to the transport when instantiating a client */
var transport = new Transport <ConnectionSettings>(settings, requestPipelineFactory, DateTimeProvider.Default, new MemoryStreamFactory());
/** this allows you to have requests executed on your own custom request pipeline */
}
public async void When_RequestPipeline_ExecPipeLine_With_MoreThanOne_Handler_SameKey()
{
Mock <IHandlersServiceProvider> providerMock = new Mock <IHandlersServiceProvider>();
TestRequest1 testRequest1 = new TestRequest1();
testRequest1.text = "1";
providerMock.Setup(o => o.GetHandlers(testRequest1)).Returns(new List <IBaseHandler> {
new HandlersSample1(), new HandlersSampleNOError()
});
RequestPipeline provider = new RequestPipeline(providerMock.Object);
var res = await provider.ExecPipeline(testRequest1);
var response = res.GetResponse <TestResponse1>();
response.ShouldNotBeNull();
res.ResponseHasErros().ShouldBeFalse();
response.text.ShouldBe(testRequest1.text);
res.Count.ShouldBe(2);
}
public void RequestPipeline()
{
var settings = TestClient.CreateSettings();
/** When calling `Request()` or `RequestAsync()` on an `ITransport`,
* the whole coordination of the request is deferred to a new instance in a `using` block.
*/
var pipeline = new RequestPipeline(
settings,
DateTimeProvider.Default,
new MemoryStreamFactory(),
new SearchRequestParameters());
pipeline.GetType().Should().Implement<IDisposable>();
/** An `ITransport` does not instantiate a `RequestPipeline` directly; it uses a pluggable `IRequestPipelineFactory`
* to create it
*/
var requestPipelineFactory = new RequestPipelineFactory();
var requestPipeline = requestPipelineFactory.Create(
settings,
DateTimeProvider.Default, //<1> An <<date-time-providers,`IDateTimeProvider` implementation>>
new MemoryStreamFactory(),
new SearchRequestParameters());
requestPipeline.Should().BeOfType<RequestPipeline>();
requestPipeline.GetType().Should().Implement<IDisposable>();
/** You can pass your own `IRequestPipeline` implementation to the Transport when instantiating a client,
* allowing you to have requests executed on your own custom request pipeline
*/
var transport = new Transport<ConnectionSettings>(
settings,
requestPipelineFactory,
DateTimeProvider.Default,
new MemoryStreamFactory());
}
public SimpleHostBuilder Pipeline(Middleware <RequestContext> fallback, Action <IRequestPipeline <RequestContext> > builder)
{
_pipeline = new RequestPipeline(fallback);
builder(_pipeline);
return(this);
}
public override void Initialize()
{
base.Initialize();
this.requestPipeline = new RequestPipeline();
}
public RequestPipelineMiddleware(RequestDelegate next, RequestPipeline pipeline)
{
_next = next;
_pipeline = pipeline;
}
/*
* 工厂方法模式：定义一个用于创建对象的接口，让子类决定实例化哪一个类。Factory Method使得一个类的实例化延迟到子类。--《设计模式》GoF
*
* 使用频率：★★★★★
*
* 模式的组成：
*
* （1）抽象工厂角色（Creator）: 充当抽象工厂角色，定义工厂类所具有的基本的操作，任何具体工厂都必须继承该抽象类。
* 如：[XiaoMiPhoneFactoryProvider,IHttpHandlerFactory]
*
* （2）具体工厂角色（ConcreteCreator）：充当具体工厂角色，该类必须继承抽象工厂角色，实现抽象工厂定义的方法，用来创建具体产品。
* 如：[XiaoMi8FactoryProvider,XiaoMi9FactoryProvider,AshxHttpHandlerFactory,AspxHttpHandlerFactory]
*
* （3）抽象产品角色（Product）：充当抽象产品角色，定义了产品类型所有具有的基本操作，具体产品必须继承该抽象类。
* 如：[XiaoMiPhone,IHttpHandler]
*
* （4）具体产品角色（ConcreteProduct）：充当具体产品角色，实现抽象产品类对定义的抽象方法，由具体工厂类创建，它们之间有一一对应的关系。
* 如：[XIaoMi8,XIaoMi9]
*
*/
static void Main(string[] args)
{
/*
* 这里我们引入简单工厂模式来对比，进而引入工厂方法模式。
*/
/*
* 1.简单工厂模式：
* 业务场景：小米手机工厂生产手机，并获取手机信息
*/
/*
* 1.某个业务点需要一个XiaoMiPhone对象，我们通过当前传入的类型，分别产生具体的小米手机
* 2.这样的话这个业务点以后有新的手机类型也不用变化，我们把变化全部挪到了XiaoMiPhoneFactory.GetPhone
* 3.这样使用简单工厂模式 稍微削弱了耦合度
*/
//某个业务点需要一个XiaoMiPhone对象，我们通过当前传入的类型，分别产生具体的小米手机
Console.WriteLine("==============XiaoMi8=============");
SimpleFactory.XiaoMiPhone phone1 = SimpleFactory.XiaoMiPhoneFactory.GetPhone(PhoneType.XiaoMi8);
Console.WriteLine(phone1.GetPhoneInfo());
Console.WriteLine("==============XiaoMi9=============");
SimpleFactory.XiaoMiPhone phone2 = SimpleFactory.XiaoMiPhoneFactory.GetPhone(PhoneType.XiaoMi9);
Console.WriteLine(phone2.GetPhoneInfo());
/*
* 简单工厂的问题：倘若我们要加一个手机类型，我们需要在PhoneType里边加一个，并要修改XiaoMiPhoneFactory.GetPhone中的switch代码，以适配新的手机类型。
* 我们的原则是 对修改关闭，对扩展开放，我们期望努力接近这个原则，尽最大努力在修改需求的时候只扩展代码（添加新代码，原来代码不变），不修改原来代码。
* 所以简单工厂模式改进成了工厂方法模式(FactoryMethod)。
*
* 2.工厂方法模式：小米公司生产小米手机，需要一个小米手机工厂来生产
*/
//初始化小米公司，默认有一个Mix2的工厂，生产Mix2手机
Console.WriteLine("==============Mix2的工厂，生产Mix2手机=============");
XiaoMiCompany company = new XiaoMiCompany();
company.DisplayPhoneInfo();
Console.WriteLine("==============换成XiaoMi8的工厂，生产Mi8手机=============");
company.SetXiaoMiPhoneFactoryProvider(new XiaoMi8FactoryProvider());
company.DisplayPhoneInfo();
Console.WriteLine("==============换成XiaoMi9的工厂，生产Mi9手机=============");
company.SetXiaoMiPhoneFactoryProvider(new XiaoMi9FactoryProvider());
company.DisplayPhoneInfo();
/*
* 总结：
* 1.这里我们不必改原来的代码，这里代码逻辑可能简单，可能看不出来效果，但是业务一旦复杂就体现出来了。
* 但是这里我们一旦有新的手机型号是，我们只需要再加一个FactoryProvider就行了，不必像简单工厂那样还要改一下swtich(type)
* 还要在PhoneType里边加一个类型了。
*
* 2.假如XiaoMiCompany已经是你写好了一个类了，你供给外部使用，但是一旦有需要，外部就不能像简单工厂那样改你的代码来增加实现吧
* 所以如果你这时候设计成 工厂方法模式时，对方就可以自己在外部加一个新的Provider，然后替换掉你那个就可以了，你的代码完全不用动，还能对外扩展
* 这就更进一步的实现了 对扩展开发 对修改关闭的原则，可以看出，工厂方法模式比简单工厂模式更具备扩展性。
*
* 3.工厂方法模式是一种非常常用的设计模式，.Net 的类库 或者 各种框架的设计中都用了这种模式，试想一下，你在使用这些类库和
* 框架的时候，不能修改人家的代码吧，但是你会发现，你用框架的时候扩展性都很强，可以随时替换一些配置来满足你的要求。
*/
/*
* 这里我们模拟asp.net Http请求的处理，一个请求过来，我们根据不同的后缀名我们会返回不同的响应结果。
*
*/
Console.WriteLine("==============模拟Http请求管道=============");
//1.模拟一个请求
HttpContext context = new HttpContext();
context.Request = "http://localhost/user/login.aspx";
//2.进入管道进行处理
RequestPipeline pipeline = new RequestPipeline(context);
pipeline.GetProcessResult();
//如果换成ashx请求
HttpContext context2 = new HttpContext();
context2.Request = "http://localhost/user/login.ashx";
//2.进入管道进行处理
RequestPipeline pipeline2 = new RequestPipeline(context2);
pipeline2.GetProcessResult();
//如果我们想处理别的请求
//用pipeline2.RegisterIHttpHandlerFactory() 注册其他的工厂
/*
* 1.有了这个架构，我们就可以直接再添加处理静态文件的工厂StaticFileHttpHandlerFactory和StaticHttpHandler
* 2.甚至后来的MvcHttpHandlerFactory和MvcHttpHandler 也能这样的扩展
* 3.此时此刻可能你才觉得这样设计的重要性，因为我们经常没这么想过以后的或者没有写框架给人用，反正都是自己用，
* 不满足需求就直接一把梭改源代码的，改来改去就改不下去了。
*
* 中心思想：一般能使用简单工厂的地方都可以替换为工厂方法模式，工厂方法模式只是简单工厂好一点，可以用依赖入住来解耦，只要是工厂模式都差不多，只是作了扩展优化，看情况而定。
*/
Console.ReadKey();
}
public RequestPipelineMiddleware(RequestDelegate next, RequestPipeline pipeline)
{
_next = next;
_pipeline = pipeline;
}
