QueueServiceProvider
Laravel Most registrations of various services are bound through various ServiceProviders, and queue services are no exception. Open the namespace IlluminateQueueQueueServiceProvider file and locate the register method.
public function register() { // 注册队列管理器 一旦实例化,为队列连接器注册各种解析器,这些连接器负责创建接受队列配置和实例化各种不同队列处理的类。 // 按照配置文件注册一个默认连接方式 在此使用 redis $this->registerManager(); // 注册队列各种命令 队列连接 重启等。 $this->registerWorker(); // 注册队列监听命令 $this->registerListener(); // 5.1后弃用 $this->registerSubscriber(); // 注册队列失败处理 $this->registerFailedJobServices(); // Register the Illuminate queued closure job. 什么用,后面再看。 $this->registerQueueClosure(); }
Task creation and allocation
php artisan make:job SendReminderEmail
Follow the documentation This method generates a queue task class, which inherits namespaceAppJobsJob and implements the interfaces SelfHandling and ShouldQueue. Maybe you will ask what is the use of these two interfaces without any specification (skip them first). The focus is on the two traits. Various operations, deletion, retry, delay, etc. are implemented for queue tasks.
When allocating tasks, we use the auxiliary function dispatch, which is actually the dispatch method of the Dispatcher class under IlluminateBus
public function dispatch($command, Closure $afterResolving = null) { if ($this->queueResolver && $this->commandShouldBeQueued($command)) { // 队列执行 return $this->dispatchToQueue($command); } else { // 立即执行 return $this->dispatchNow($command, $afterResolving); } } protected function commandShouldBeQueued($command) { if ($command instanceof ShouldQueue) { // 就这用。。 return true; } return (new ReflectionClass($this->getHandlerClass($command)))->implementsInterface( 'Illuminate\Contracts\Queue\ShouldQueue' ); }
Here, let’s first look at the
public function register() { $this->app->singleton('Illuminate\Bus\Dispatcher', function ($app) { return new Dispatcher($app, function () use ($app) { // 'queue.connection' => 'Illuminate\Contracts\Queue\Queue', 再回看 QueueServiceProvider 的 registerManager 方法,就很清晰了。 return $app['Illuminate\Contracts\Queue\Queue']; // 默认队列连接 }); }); }under namespace IlluminateBusBusServiceProvider
Then let’s look at dispatchToQueue
public function dispatchToQueue($command) { $queue = call_user_func($this->queueResolver); // 在此为设置的默认值 将实例化 RedisQueue // 异常则抛出! if (! $queue instanceof Queue) { throw new RuntimeException('Queue resolver did not return a Queue implementation.'); } if (method_exists($command, 'queue')) { // 可以自定义 return $command->queue($queue, $command); } else { // 在此使用的是进入队列方式 最终结果类似 $queue->push(); 看 RedisQueue 下的 push 方法。 return $this->pushCommandToQueue($queue, $command); } }
The above task enters the queue The whole process is clear. What about dequeuing tasks? We can see in the document that we monitor the queue by executing the statement php artisan queue:work. Let’s take a look at namespace IlluminateQueueConsoleWorkCommand::fire(). It’s very late at night. Let’s take a look for yourself!

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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