byjg / message-queue-client
A generic and extensible lightweight messaging client to publish and consume messages from messaging servers like Amazon SQS, Amazon SNS, Google PubSub, RabbitMQ, Kafka, etc.
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Requires (Dev)
- phpunit/phpunit: ^9.6
- vimeo/psalm: ^5.9
README
This is a simple client to publish and consumes messages from a Message Queue server.
Features
- Low code to publish and consume messages
- Messages, Queues and Connector objects are decoupled
- Easy to implement new connectors
┌─────────────────┐ ┌────────────────────────┐
│ │ │ Envelope │
│ │ │ │
│ │ │ │
│ │ │ ┌─────────────────┐ │
│ │ publish() │ │ Pipe │ │
│ ├─────────────────▶│ └─────────────────┘ │
│ │ │ ┌─────────────────┐ │
│ │ │ │ Message │ │
│ │ │ └─────────────────┘ │
│ │ │ │
│ │ └────────────────────────┘
│ Connector │
│ │
│ │
│ │ consume() ┌─────────────────┐
│ │◀────────────────────│ Pipe │
│ │ └─────────────────┘
│ │
│ │
│ │
└─────────────────┘
Implemented Connectors
Usage
Publish
<?php // Register the connector and associate with a scheme ConnectorFactory::registerConnector(MockConnector::class); // Create a connector $connector = ConnectorFactory::create(new Uri("mock://local")); // Create a queue $pipe = new Pipe("test"); $pipe->withDeadLetter(new Pipe("dlq_test")); // Create a message $message = new Message("Hello World"); // Publish the message into the queue $connector->publish(new Envelope($pipe, $message));
Consume
<?php // Register the connector and associate with a scheme ConnectorFactory::registerConnector(MockConnector::class); // Create a connector $connector = ConnectorFactory::create(new Uri("mock://local")); // Create a queue $pipe = new Pipe("test"); $pipe->withDeadLetter(new Pipe("dlq_test")); // Connect to the queue and wait to consume the message $connector->consume( $pipe, // Queue name function (Envelope $envelope) { // Callback function to process the message echo "Process the message"; echo $envelope->getMessage()->getBody(); return Message::ACK; }, function (Envelope $envelope, $ex) { // Callback function to process the failed message echo "Process the failed message"; echo $ex->getMessage(); return Message::REQUEUE; } );
The consume method will wait for a message and call the callback function to process the message. If there is no message in the queue, the method will wait until a message arrives.
If you want to exit the consume method, just return Message::ACK | Message::EXIT
from the callback function.
Possible return values from the callback function:
Message::ACK
- Acknowledge the message and remove from the queueMessage::NACK
- Not acknowledge the message and remove from the queue. If the queue has a dead letter queue, the message will be sent to the dead letter queue.Message::REQUEUE
- Requeue the messageMessage::EXIT
- Exit the consume method
Consumer Client
You can simplify the consume method by using the ConsumerClientTrait. See more details in the docs/consumer-client-trait.md.
Connectors
The connectors are the classes responsible to connect to the message queue server and send/receive messages.
All connector have the following interface:
<?php interface ConnectorInterface { public function setUp(Uri $uri); public function getDriver(); public function publish(Envelope $envelope); public function consume(Pipe $pipe, \Closure $onReceive, \Closure $onError, $identification = null); }
There is no necessary call the method getDriver()
because the method publish() and consume() will call it automatically.
Use the method getDriver()
only if you need to access the connection directly.