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  • Modules Providing Support
  • Message Publisher Interface
  • How to use Message Publisher

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  1. Modelling
  2. Distributed Bus and Microservices

Message Publisher

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Last updated 2 years ago

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Message Publisher provide abstraction to send Message to other Services. This way you can send message with simple interface without exposing Message Broker implementation and keeping possibility to easily switch implementation when needed.

Modules Providing Support

Message Publisher Interface

interface MessagePublisher
{

    // 1
    public function send(string $data, string $sourceMediaType = MediaType::TEXT_PLAIN) : void;

    // 2
    public function sendWithMetadata(string $data, array $metadata, string $sourceMediaType = MediaType::TEXT_PLAIN) : void;

    // 3
    public function convertAndSend(object|array $data) : void;

    // 4
    public function convertAndSendWithMetadata(object|array $data, array $metadata) : void;
}
  1. send - Send a string type via Publisher. It does not need any conversion, you may add additional Media Type of $data.

How to use Message Publisher

#[EventHandler] 
public function whenOrderWasPlaced(OrderWasPlaced $event, MessagePublisher $publisher) : void
{
    $publisher->convertAndSendWithMetadata(
        $event,
        [
            "system.executor" => "Johny"
        ]
    );
}

sendWithMetadata - Does the same as send, allows for sending additional .

convertAndSend - Allow for sending types, which needs conversion. Allow for sending objects and array, Ecotone make use of to convert $data.

convertAndSendWithMetadata - Does the same as convertAndSend, allow for sending additional .

Publisher is a special type of , which implements . It will be available in your Dependency Container under passed Reference name. In case interface name MessagePublisher:class is used, it will be available using auto-wire.

Conversion system
Gateway
RabbitMQ Module
Publisher interface
Meta data
Meta data