facade | 易学教程

Trying to figure out if this code creates any benefit by using a Singleton

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问题 I'm working on a project where one of the co-developers (and previous developers) use a Singleton/Facade for just about every page of class that has a lot of method calls inside of it, but that don't actually maintain the data. For instance: public class FooFacade { private static FooFacade m_facade = null; private static DataAccessManager m_dataAccessMgr = null; public StringBuilder Status {get; set; } private FooFacade() { this.Status = new StringBuilder(); } public static FooFacade

Laravel: do facades actually create new objects on calling methods?

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问题 I have a demo class normally bound via $this->app->bind('demo', function() { return new Demo(); } An set up a facade protected static function getFacadeAccessor() { return 'demo'; } The class itself looks like this class Demo { private $value1; private $value2; public function setVal1($value) { $this->value1 = $value; } public function setVal2($value) { $this->value2 = $value; } public function getVals() { return 'Val 1: ' . $this->value1 . ' Val 2: ' . $this->value2; } } I was told that if I

Auto-generate a strongly-typed AppSettings class

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问题 Here's the question first: Is this possible? I'm taking my inspiration from Joe Wrobel's work (a redux of the forgotten Codeplex project). Here, you do your work on creating your profile for the provider, and it does the legwork of creating the strong typing for it, effectively creating a facade for the Profile class. And now the back story! I really don't like magic strings. They're pretty bad and can cause some serious issues when it comes to updating your application. Having worked in

How to setup a Web API Facade pattern

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问题 I've been reading about the Facade Pattern and I'm trying to get an idea on how to implement this. This is how I understand how it can be implemented: ------------------------------------------------------------- | (Facade layer) API Exposure | ------------------------------------------------------------- | DMZ | | (Auth API) (Application Web API) | ------------------------------------------------------------- So there are two layers. So basically two Web API end points. One that lives in the

Extend Laravel 5 Response Facade

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问题 I am getting a namespacing issue when trying to extend the Response facade in Laravel 5. I have created a new folder tree under the app directory called Extensions\Facades . In this folder I have a file called AjaxResponse.php which has the following contents: <?php namespace App\Extensions\Facades; use Illuminate\Support\Facades\Response; class AjaxResponse extends Response{ public static function send($code,$body,$http_code=200){ parent::json( array( 'status'=>(string)$code, 'body' =>$body

Why use facade pattern in EJB?

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I've read through this article trying to understand why you want a session bean in between the client and entity bean. Is it because by letting the client access entity bean directly you would let the client know exactly all about the database? So by having middleman (the session bean) you would only let the client know part of the database by implementing the business logic in some certain way. So only part of the database which is relevant to the client is only visible. Possibly also increase the security. Is the above statement true? Avoiding tight coupling between the client & the business

Laravel Facades 门面模式的实现

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以下是Laravel官方文档的介绍 Facades 为应用程序的服务容器中可用的类提供了一个「静态」接口。Laravel 本身附带许多的 facades，甚至你可能在不知情的状况下已经在使用他们！Laravel 「facades」作为在服务容器内基类的「静态代理」，拥有简洁、易表达的语法优点，同时维持着比传统静态方法更高的可测试性和灵活性。从介绍中可以看出，Facades 好处就是让代码更加简介，优雅，这也是Laravel追求的特性，如何使用Facades这里就不介绍了，可以参考 Laravel文档(中文) ，本文介绍一下Facades是如何知道和创建你需要的类实例。以 log Facade 为例，我们看下是如何通过log这个字符串找到 \Illuminate\Log\Writer 这个类的先看 \Illuminate\Support\Facades\Log 门面 class Log extends Facade { /** * Get the registered name of the component. * * @return string */ protected static function getFacadeAccessor() { return 'log'; } } 这个类非常简单，只有一个静态方法 getFacadeAccessor(),

设计模式----外观模式UML和实现代码（5个必须掌握的设计模式）

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一、什么是外观模式？外观模式（Facade）定义：为子系统中的一组接口提供一个一致的界面，些模式定义了一个高层接口。这个接口使得这一子系统更加容易使用。类型：结构型模式顺口溜：适装桥组享代外二、外观模式UML 三、JAVA代码实现 package com.amosli.dp.structural.facade; public class Facade { SubsystemOne one; SubsystemTwo two; SubsystemThree three; public Facade() { one = new SubsystemOne(); two = new SubsystemTwo(); three = new SubsystemThree(); } public void methodA() { System.out.println("group A:"); one.operation1(); two.operation2(); } public void methodB() { System.out.println("group B:"); three.operation3(); } } package com.amosli.dp.structural.facade; public class SubsystemOne { public

Is it possible to databind to an extension method?

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The lack of questions on the subject may be an indication of code smell here, but... Is it possible to write an extension method for a class and databind to that like you would a property? The assumption is that I am provided with a class structure that I'm not able to fundamentally change, but I want to express a series of its boolean properties as a string for display purposes. Simplified base class: public class Transmission { public int ID { get; set; } public bool Cancelled { get; set; } public bool Stored { get; set; } public bool Recorded { get; set; } } My extension method: public

12.设计模式之十：外观模式【结构型模式】

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在现实生活中，常常存在办事较复杂的例子，如办房产证或注册一家公司，有时要同多个部门联系，这时要是有一个综合部门能解决一切手续问题就好了。软件设计也是这样，当一个系统的功能越来越强，子系统会越来越多，客户对系统的访问也变得越来越复杂。这时如果系统内部发生改变，客户端也要跟着改变，这违背了“开闭原则”，也违背了“迪米特法则”，所以有必要为多个子系统提供一个统一的接口，从而降低系统的耦合度，这就是外观模式的目标。定义与特点外观（Facade）模式的定义：是一种通过为多个复杂的子系统提供一个一致的接口，而使这些子系统更加容易被访问的模式。该模式对外有一个统一接口，外部应用程序不用关心内部子系统的具体的细节，这样会大大降低应用程序的复杂度，提高了程序的可维护性。外观（Facade）模式是“迪米特法则”的典型应用，它有以下主要优点。降低了子系统与客户端之间的耦合度，使得子系统的变化不会影响调用它的客户类。对客户屏蔽了子系统组件，减少了客户处理的对象数目，并使得子系统使用起来更加容易。降低了大型软件系统中的编译依赖性，简化了系统在不同平台之间的移植过程，因为编译一个子系统不会影响其他的子系统，也不会影响外观对象。外观（Facade）模式的主要缺点如下。不能很好地限制客户使用子系统类。增加新的子系统可能需要修改外观类或客户端的源代码，违背了“开闭原则”。结构与实现外观

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