As the scale of web applications continues to expand, queues have become an essential part of various systems. Queues can improve application performance by processing certain tasks asynchronously. Many PHP developers use the Laravel framework, and Laravel provides a very useful queue management tool - Laravel Queues.

Laravel Queues allow developers to easily implement functions such as task dispatching and asynchronous task processing. We can configure different queue drivers, such as database driver, Redis driver, etc. In Laravel, we can also use a tool called Laravel Horizon to monitor and manage queues.

Laravel Horizon is a queue monitoring toolkit officially provided by Laravel. It provides an intuitive Dashboard to monitor the running status of the queue in real time, making it convenient for developers to manage and debug the queue. This article will introduce how to use Laravel Horizon to implement queue monitoring, and demonstrate its main functions and advantages.

1. Install Laravel Horizon

First, we need to install Laravel Horizon in our Laravel application. We can use Composer to install:

composer require laravel/horizon

After the installation is complete, we need to add the Laravel Horizon service provider in the config/app.php file. Open the config/app.php file and add:

LaravelHorizonHorizonServiceProvider::class,

Next, we need to generate Horizon configuration files and Horizon language packs in the providers array. We can use the Artisan command to generate:

php artisan vendor:publish --provider="LaravelHorizonHorizonServiceProvider"

2. Configure Laravel Horizon

After installing Laravel Horizon, we need to configure it. We can configure Horizon using the config/horizon.php configuration file. Through this file, we can configure the queue connection, the number of queue worker processes, log level, exit wait time, and other settings about the queue.

Where, connection is the name of the queue connection configured for Horizon monitoring. Laravel uses redis as the default queue driver by default, so we can set this name to "redis".

In the config/horizon.php file, we can set the Horizon access method, such as whether authentication is required. We can add the standard Laravel authentication middleware to Horizon's routes. This will ensure that only authenticated users can view Horizon's Dashboard page:

'middleware' => ['web', 'auth'],

3. Start Horizon

After installing and configuring Laravel Horizon, we can start Horizon. We can start Horizon using the Artisan command:

php artisan horizon

On our console window you will see details about Horizon. This includes the name of the queue to which Horizon is connected, the number of worker processes, log output, etc.

4. Using Laravel Horizon

After starting Horizon, we can access the Horizon Dashboard page. We can access it through the following URL:

http://your-app.com/horizon

On the Dashboard page, we can see a lot of queue-related data. These include:

1. The number of "pending" tasks: Under the "pending" tab, we can see the number of unprocessed tasks in the current queue. This helps us understand the health of the queue in real time.
2. Real-time metrics: Under the real-time metrics tab, we can view real-time metrics on completion, failed tasks, processing delays, etc. This tab helps us better understand the status of the queue.
3. Worker Processes: Under the Worker Processes tab, we can view the list of running queue worker processes and can view information about each worker process. Here we can view the memory consumed by each process, the number of tasks processed, etc.
4. Queue: Under the Queue tab, we can get more detailed information about the queue. We can view information about the queue's name, task type, task count, etc. Here we can also perform various actions such as liking, pausing and unliking the queue, as well as clearing the queue manually.

Summary

Laravel Horizon is a very practical and easy-to-use queue monitoring tool in the Laravel framework. With Horizon, we can better understand the status of the queue, process and ensure that tasks in the queue are processed in a fast and efficient manner. If you are using the Laravel framework, using Laravel Horizon is an excellent option to manage your queues.

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