Laravel5(Lumen)创建服务提供者Service Providers
在搞新浪SAE的时候,把Lumen装上,需要实现Memcahce和Storage的实现,就用到了Lumen的服务提供者,看了下官方文档和查阅了一些资料,记录一下。(本文在Lumen中实现,Laravel中实现几乎差不多)
1、app\Http\文件夹下面新建Models文件夹,在Models文件夹下面新建Example.php文件,将app\Http\Models加入到composer.json文件中的autoload类自动加载
"autoload": { "psr-4": { "App\\": "app/", "App\\Http\\Models\\": "app/Http/Models/" } },
Example.php文件创建一个example类
<?php/* * example演示类 */namespace App\Http\Models;class Example extends \Illuminate\Database\Eloquent\Model { public function sayHello() { echo "hello,this is a model say"; }}
2、app\Providers\文件夹中创建一个服务提供者ExampleServiceProvider.php。并注册Models中的example类
<?php/** * Example服务提供者 */namespace App\Providers;use Illuminate\Support\ServiceProvider;use App\Http\Models\Example;class ExampleServiceProvider extends ServiceProvider { /** * 在容器中注册绑定. * * @return void */ public function register() { $this->app->singleton('App\Http\Models\Example', function($app) { return new Example($app); }); }}
3、将Example服务提供者加入启动,在bootstrap\app.php中加入
$app->register(App\Providers\ExampleServiceProvider::class);
完成以上操作我们的Example服务提供者已经添加好了,并启用,下面就来使用它
4、在Controller中使用它
为了测试,我们创建了一个路由为example,controller为ExampleController.php文件
<?php/** * Example实例Controller */namespace App\Http\Controllers;use App\Http\Models\Example;class ExampleController extends Controller { public function __construct(Example $example) { $this->example= $example; } public function index() { $this->example->sayHello(); }
5、浏览器中执行路由,应该看到输出了如下内容:
hello,this is a model say
小结:
1、Laravel的服务提供者为你添加各种扩展很方便,也是核心东西。感觉就像添加Yii的组件一样,为你扩展各种功能,其实很方便的。Laravel的服务提供者其实是一个很复杂的东西,这里只是一个简单的实例,更多的东西还是要看官方给出的文档及实例。
2、Laravel的扩展开发,也是通过服务提供者启动的,比如:
Cache::extend('mongo', function($app){ return Cache::repository(new MongoStore);});
以下为中文翻译官方文档原话:
Cache::extend 的调用可以在新的 Laravel 应用程序默认附带的App\Providers\AppServiceProvider 的 boot 方法中完成,或者你可以建立自己的服务提供者来放置这个扩展
参考文档:
1、http://www.golaravel.com/laravel/docs/5.0/providers/
2、https://laravel.com/docs/5.2/providers

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