Laravel 4一个界面同时具有多个实现

Question

问题是我不知道如何绑定一个接口的多个实现.

例:

// One interface
interface SmsInterface {
...
}

// First implementation using SmsCoin
class SmscoinAPI implements SmsInterface {
...
}


// Second implementation using Fortumo
class FortumoAPI implements SmsInterface {
...
}

//两个控制器:

class SmsCoinController {
    public function __construct(SmsInterface $sms) {
        $this->sms = $sms
    }
}

class FortumoController {
    public function __construct(SmsInterface $sms) {
        $this->sms = $sms
    }
}

1. 问题:我如何使用FortumoController实现FortumoApi绑定SmsInterface,并将SmsInterface绑定到SmsCoinController的实现SmsCoinApi？

2. 我使用ServiceProvider来注册绑定,我可以在那里做吗？如果没有绑定的位置？

编辑:

我无法在任何地方得到答案,阅读许多laravel书籍,据说在任何地方使用多个实现,但没有显示如何交换/切换这些实现.

如果我有一个接口和两个实现,如何在控制器中绑定和交换它们.我是否需要在该控制器构造函数方法中执行此操作？或通过检查控制器的路线或在filters.php的路线？还是在服务提供商？以及如何在技术上相关地编写该代码？

Answer 1

这个问题花了我很长时间来解决它.在Laravel 5.0出局后,我发布了使用Contextual绑定找到的解决方案

考虑这个例子,当一个控制器需要一个具有多个实现的接口时.

<?php

// We are creating one abstract controller with one logic
abstract class AbstractSearchController
{
    protected $searchService;

    public function __construct(SearchServiceInterface $searchService)
    {
        $this->searchService = $searchService;
    }

    public function getResult($keyword)
    {
        return $this->searchService->getItems($keyword);
    }
}

// In routes.php file we can point url like: http://example.com/search/posts/?keyword=my-search-keyword to use 
// something like this: Route::resource('search/posts', 'PostSearchController', ['only' => ['index']]);
class PostSearchController extends AbstractSearchController
{
    // No code here as this controller only is needed so that we can point Specific implementation to it
}

// In routes.php file we can point url like: http://example.com/search/members/?keyword=my-search-keyword to use 
// something like this: Route::resource('search/members', 'MemberSearchController', ['only' => ['index']]);
class MemberSearchController extends AbstractSearchController
{
    //
}

// Our main interface that will have multiple implementations at same time
interface SearchServiceInterface
{
    public function getItems($keyword);
}

// Our first implementation of interface
class MemberSearchRepo implements SearchServiceInterface
{
    public function getItems($keyword)
    {
        // Get members by keyword
    }
}

// Our second implementation of interface
class PostSearchRepo implements SearchServiceInterface
{
    public function getItems($keyword)
    {
        // Get posts by keyword
    }
}

// When PostsSearchController needs Search Logic point IoC to give our first implementation
$this->app->when('PostSearchController')->needs('SearchServiceInterface')->give('PostSearchRepo');

// When MemberSearchController needs Search Logic point IoC to give our seconds implementation
$this->app->when('MemberSearchController')->needs('SearchServiceInterface')->give('MemberSearchRepo');

我希望这个扩展的例子可以帮助人们理解如何实现Laravel 4.x所需的功能以及Laravel 5提供的功能