没有不值得去解决的问题,也没有不值得去学习的技术!

How to Reset Constructor Parameters When Resolving a Singleton Bound in the Laravel 6 Service Container

1. Bind a singleton in the service container. The existing implementation is as follows:

PHP

$this->app->singleton(ThemeHandler::class, function() {
	return new ThemeHandler(
		base_path('Modules') . '/ThemeStoreDb/Resources/setting_migrations'
	);
});

class ThemeHandler
{
    private $themeSettingMigrator;

    public function __construct(string $defaultMigrationsLocation)
    {
        Log::info(
            '$defaultMigrationsLocation',
            [$defaultMigrationsLocation]
        );
        $this->themeSettingMigrator = new ThemeSettingMigrator($defaultMigrationsLocation);
    }
}

app(ThemeHandler::class)->migrateThemeSettings($this->themeInstallation, $this->themeInstallationTask);

2. Now there is a need to potentially reset the constructor parameters of the singleton after resolving it. The new implementation is as follows:

PHP

$this->app->singleton(ThemeHandler::class, function($app, $parameters) {
	return new ThemeHandler(
		$parameters['migrationsLocation'] ?? base_path('Modules') . '/ThemeStoreDb/Resources/setting_migrations'
	);
});

app(ThemeHandler::class, ['migrationsLocation' => 'E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1'])->migrateThemeSettings($this->themeInstallation, $this->themeInstallationTask);

3. The parameters of app(ThemeHandler::class, []) and app(ThemeHandler::class, [‘migrationsLocation’ => ‘E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1’]) in the constructor are output to the log respectively, as expected.

Plaintext


[2023-07-06 15:49:57] local.INFO: $defaultMigrationsLocation [
    "E:\\wwwroot\\object\\Modules/ThemeStoreDb/Resources/setting_migrations"
] 


[2023-07-06 16:16:47] local.INFO: $defaultMigrationsLocation [
    "E:/wwwroot/object/Modules/ThemeStoreDb/Resources/setting_migrations1"
] 

关于作者 · 持续学习与技术实践

我是一名拥有 15 年以上开发经验的技术从业者,自 2013 年起持续运营个人技术博客,记录工作与个人项目中遇到的真实问题,以及解决问题过程中的探索、实践和思考。

除了技术写作,我也在持续开发和维护自己的独立项目,探索新技术和新工具在实际场景中的应用。我始终相信,没有不值得去解决的问题,也没有不值得去学习的技术。

如果这篇文章对你有所帮助,欢迎浏览博客中的其他文章,也欢迎交流技术经验与想法。

关于我  ·  GitHub  ·  邮件联系