milind/laravel-pubsub

为 Laravel 提供的 Pub-Sub 抽象

dev-master / 1.0.x-dev 2021-07-18 13:15 UTC

This package is auto-updated.

Last update: 2024-09-18 19:59:30 UTC


README

为 Laravel 提供的 Pub-Sub 抽象。

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该包是 php-pubsub 的封装,用于 Laravel。

要支持 Laravel 4,请使用该包 https://github.com/milind/laravel4-pubsub

请注意,Laravel 5.3 仅支持到版本 2.0.2。

2.0.3+ 支持未来的 Laravel 5.4 及以上

以下适配器受支持

  • 本地
  • /dev/null
  • Redis
  • Kafka(请参阅下面的单独安装说明)
  • Google Cloud
  • HTTP

安装

composer require milind/laravel-pubsub

在 app.php 中注册服务提供者

'providers' => [
    // ...
    milind\LaravelPubSub\PubSubServiceProvider::class,
]

在 app.php 中注册外观

'aliases' => [
    // ...
    'PubSub' => milind\LaravelPubSub\PubSubFacade::class,
]

该包具有默认配置,使用以下环境变量。

PUBSUB_CONNECTION=redis

REDIS_HOST=localhost
REDIS_PASSWORD=null
REDIS_PORT=6379

KAFKA_BROKERS=localhost

GOOGLE_CLOUD_PROJECT_ID=your-project-id-here
GOOGLE_CLOUD_KEY_FILE=path/to/your/gcloud-key.json

HTTP_PUBSUB_URI=null
HTTP_PUBSUB_SUBSCRIBE_CONNECTION=redis

要自定义配置文件,请使用 Artisan 发布包配置。

php artisan vendor:publish --provider="milind\LaravelPubSub\PubSubServiceProvider"

然后您可以在 app/config/pubsub.php 中编辑生成的配置。

Kafka 适配器安装

请注意,虽然该包包含对 php-pubsub-kafka 适配器的支持,但该适配器默认不包含。

这是因为 KafkaPubSubAdapter 依赖于外部的 librdkafka C 库php-rdkafka PECL 扩展。

如果您打算使用此适配器,您需要按照以下 安装说明 安装这些依赖项。

然后您可以使用以下方式包含适配器

composer require milind/php-pubsub-kafka

用法

// get the pub-sub manager
$pubsub = app('pubsub');

// note: function calls on the manager are proxied through to the default connection
// eg: you can do this on the manager OR a connection
$pubsub->publish('channel_name', 'message');

// get the default connection
$pubsub = app('pubsub.connection');
// or
$pubsub = app(\milind\PubSub\PubSubAdapterInterface::class);

// get a specific connection
$pubsub = app('pubsub')->connection('redis');

// publish a message
// the message can be a string, array, bool, object - anything which can be json encoded
$pubsub->publish('channel_name', 'this is where your message goes');
$pubsub->publish('channel_name', ['key' => 'value']);
$pubsub->publish('channel_name', true);

// publish multiple messages
$messages = [
    'message 1',
    'message 2',
];
$pubsub->publishBatch('channel_name', $messages);

// subscribe to a channel
$pubsub->subscribe('channel_name', function ($message) {
    var_dump($message);
});

// all the above commands can also be done using the facade
PubSub::connection('kafka')->publish('channel_name', 'Hello World!');

PubSub::connection('kafka')->subscribe('channel_name', function ($message) {
    var_dump($message);
});

创建一个订阅者

该包包含一个辅助命令 php artisan make:subscriber MyExampleSubscriber 来生成新的订阅者命令类。

许多 pub-sub 适配器将包含阻塞的 subscribe() 调用,因此这些命令最好作为以 supervisor 进程运行的守护进程来运行。

此生成命令将创建文件 app/Console/Commands/MyExampleSubscriber.php,该文件将包含

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use milind\PubSub\PubSubAdapterInterface;

class MyExampleSubscriber extends Command
{
    /**
     * The name and signature of the subscriber command.
     *
     * @var string
     */
    protected $signature = 'subscriber:name';

    /**
     * The subscriber description.
     *
     * @var string
     */
    protected $description = 'PubSub subscriber for ________';

    /**
     * @var PubSubAdapterInterface
     */
    protected $pubsub;

    /**
     * Create a new command instance.
     *
     * @param PubSubAdapterInterface $pubsub
     */
    public function __construct(PubSubAdapterInterface $pubsub)
    {
        parent::__construct();

        $this->pubsub = $pubsub;
    }

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $this->pubsub->subscribe('channel_name', function ($message) {

        });
    }
}

Kafka 订阅者

对于使用 php-pubsub-kafka 适配器的订阅者,您可能希望为每个订阅者更改 consumer_group_id

为此,您需要使用 PubSubConnectionFactory 为每个订阅者创建新的连接。这是因为一旦创建了连接,就不能更改 consumer_group_id

以下是如何做到这一点的示例

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use milind\LaravelPubSub\PubSubConnectionFactory;
use milind\PubSub\PubSubAdapterInterface;

class MyExampleKafkaSubscriber extends Command
{
    /**
     * The name and signature of the subscriber command.
     *
     * @var string
     */
    protected $signature = 'subscriber:name';

    /**
     * The subscriber description.
     *
     * @var string
     */
    protected $description = 'PubSub subscriber for ________';

    /**
     * @var PubSubAdapterInterface
     */
    protected $pubsub;

    /**
     * Create a new command instance.
     *
     * @param PubSubConnectionFactory $factory
     */
    public function __construct(PubSubConnectionFactory $factory)
    {
        parent::__construct();

        $config = config('pubsub.connections.kafka');
        $config['consumer_group_id'] = self::class;
        $this->pubsub = $factory->make('kafka', $config);
    }

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $this->pubsub->subscribe('channel_name', function ($message) {

        });
    }
}

添加自定义驱动程序

请参阅 php-pubsub 文档中的 编写适配器

要包含您的自定义驱动程序,您可以调用 extend() 函数。

$manager = app('pubsub');
$manager->extend('custom_connection_name', function ($config) {
    // your callable must return an instance of the PubSubAdapterInterface
    return new MyCustomPubSubDriver($config);
});

// get an instance of your custom connection
$pubsub = $manager->connection('custom_connection_name');