hyperf console 执行-编程知识

一、原理描述

hyperf中，不难发现比如自定义控制器中获取参数，hyperf.php中容器获取，传入的都是接口，而不是实体类。

这是因为框架中的配置文件有设置对应抽象类的子类，框架加载的时候将其作为数组，使用的时候通过数组对应子类。

实现这个功能就需要composer autoload 代理，即生成的composer.lock文件再处理。但是需要其余对应的composer拉取的程序在composer.json中设置对应数据。

例如

//vendor\hyperf\http-server\composer.json
"extra": {"branch-alias": {"dev-master": "2.2-dev"},"hyperf": {"config": "Hyperf\\HttpServer\\ConfigProvider"}}
//vendor\hyperf\db-connection\composer.json"extra": {"branch-alias": {"dev-master": "2.2-dev"},"hyperf": {"config": "Hyperf\\DbConnection\\ConfigProvider"}}

#vendor/hyperf/http-server/src/ConfigProvider.php
namespace Hyperf\HttpServer;use Hyperf\HttpServer\Contract\RequestInterface;
use Hyperf\HttpServer\Contract\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;class ConfigProvider
{public function __invoke(): array{return ['dependencies' => [RequestInterface::class => Request::class,ServerRequestInterface::class => Request::class,ResponseInterface::class => Response::class,],'annotations' => ['scan' => ['paths' => [__DIR__,],],],];}
}#vendor\hyperf\db-connection\src\ConfigProvider.php
namespace Hyperf\DbConnection;use Hyperf\Database\Commands\Migrations\FreshCommand;
use Hyperf\Database\Commands\Migrations\GenMigrateCommand;
use Hyperf\Database\Commands\Migrations\InstallCommand;
use Hyperf\Database\Commands\Migrations\MigrateCommand;
use Hyperf\Database\Commands\Migrations\RefreshCommand;
use Hyperf\Database\Commands\Migrations\ResetCommand;
use Hyperf\Database\Commands\Migrations\RollbackCommand;
use Hyperf\Database\Commands\Migrations\StatusCommand;
use Hyperf\Database\Commands\ModelCommand;
use Hyperf\Database\Commands\Seeders\GenSeederCommand;
use Hyperf\Database\Commands\Seeders\SeedCommand;
use Hyperf\Database\ConnectionResolverInterface;
use Hyperf\Database\Connectors\ConnectionFactory;
use Hyperf\Database\Connectors\MySqlConnector;
use Hyperf\Database\Migrations\MigrationRepositoryInterface;
use Hyperf\DbConnection\Listener\RegisterConnectionResolverListener;
use Hyperf\DbConnection\Pool\PoolFactory;class ConfigProvider
{public function __invoke(): array{return ['dependencies' => [PoolFactory::class => PoolFactory::class,ConnectionFactory::class => ConnectionFactory::class,ConnectionResolverInterface::class => ConnectionResolver::class,'db.connector.mysql' => MySqlConnector::class,MigrationRepositoryInterface::class => DatabaseMigrationRepositoryFactory::class,],'commands' => [ModelCommand::class,GenMigrateCommand::class,InstallCommand::class,MigrateCommand::class,FreshCommand::class,RefreshCommand::class,ResetCommand::class,RollbackCommand::class,StatusCommand::class,GenSeederCommand::class,SeedCommand::class,],'listeners' => [RegisterConnectionResolverListener::class,],'annotations' => ['scan' => ['paths' => [__DIR__,],],],'publish' => [['id' => 'config','description' => 'The config for database.','source' => __DIR__ . '/../publish/databases.php','destination' => BASE_PATH . '/config/autoload/databases.php',],['id' => 'query-listener','description' => 'The listener of database to record log.','source' => __DIR__ . '/../publish/DbQueryExecutedListener.php','destination' => BASE_PATH . '/app/Listener/DbQueryExecutedListener.php',],],];}
}

以bin/hyperf.php为例,加载autoload.php文件，执行Hyperf\Di\ClassLoader::init()设置，执行

$application->run();输出命令。

1.1 Hyperf\Di\ClassLoader::init()

Hyperf\Di\ClassLoader::init() 加载配置文件、composer.lock，并合并数据。

主要使用Composer::getMergedExtra('hyperf')['config']，就是composer.lock中extra中的hyperf中config值。

根据config中的值，调用其__invoke()获取数组，并设置。

在上述过程中，涉及ProviderConfig::load();运行，会对ProviderConfig::$providerConfigs数据进行初始化。

ProviderConfig::load()获取的值中包括每个composer拉取的程序中ConfigProvider.php文件中的内容，当然也就包括commands。

ProviderConfig::load()在之后也会被使用。

ClassLoader::init()会调用其构造函数，打印ClassLoader构造中的$config = ScanConfig::instance($configDir);结果，可以看到类内的成员变量包括cacheable、configDir、paths、collectors、ignoreAnnotations、globalImports、dependencies、classMap。

就bin/hyperf.php而言，此时并没有使用配置中的commands数据。

1.2 /config/container.php

hyperf.php中随后加载/config/container.php。

container.php中通过$container = new Container((new DefinitionSourceFactory(true))());，调用DefinitionSourceFactory的构造和__invoke()方法。

DefinitionSourceFactory::__invoke()中通过ProviderConfig::load();加载配置，获取配置中的dependencies数组，最后返回key和object对应的数组。

container.php文件最后返回 Hyperf\Di\Container类，其构造参数的为DefinitionSourceFactory::__invoke()返回的数组。

Hyperf\Di\Container构造方法中会设置$this->definitionSource和$this->resolvedEntries。

1.3 $container->get()

$application对象通过$application = $container->get(Hyperf\Contract\ApplicationInterface::class);获取。调用$container->get()会先判断Container::resolvedEntries是否有数据，有则返回，否则使用Container::make()使用Container::definitionSource创建数据。最后返回对应的实体类。

即为，$application = $container->get(Hyperf\Contract\ApplicationInterface::class);返回ApplicationFactory类，ApplicationFactory构造最后返回Symfony\Component\Console\Application类。

Hyperf\Contract\ApplicationInterface::__invoke()会先执行。其中运行Application::__construct(),设置默认值，比如默认命令为“list”。__invoke()还会将commands数据添加到Symfony\Component\Console\Application中。