Microservices PHP

Distributed Services PHP

Distribution

Ecotone provides support for communication in distributed architecture. The support covers sending command directly to specific service (application) or publishing events, that specific services may listen for.

Configuration

In order for Ecotone how to route messages you need to register Service Name (Application Name).

Modules Providing Support

Distribution Bus

Distribution Bus is Message Gateway just like CommandBus or EventBus. The bus is responsible for distribution of your command and events.

Depending on your Module configuration you can inject it by class name or specific reference name.

interface DistributedBus
{
// Command distribution
public function sendCommand(string $destination, string $routingKey, string $command, string $sourceMediaType = MediaType::TEXT_PLAIN, array $metadata = []) : void;
public function convertAndSendCommand(string $destination, string $routingKey, object|array $command, array $metadata = []) : void;
// Event distribution
public function publishEvent(string $routingKey, string $event, string $sourceMediaType = MediaType::TEXT_PLAIN, array $metadata = []) : void;
public function convertAndPublishEvent(string $routingKey, object|array $event, array $metadata) : void;
}

Sending Distributed Commands

  • destination - is a Service Name of targeted Service

  • routingKey - is a routing key under which CommandHandler is registered on targeted Service

public function changeBillingDetails(DistributedBus $distributedCommandBus)
{
$distributedCommandBus->sendCommand(
"billing", // destination
"billing.changeDetails", // routingKey
'["personId":"123","billingDetails":"01111"]',
"application/json"
);
}

Consuming Distributed Commands

Register distributed command handler

On the consumer side register distributed command handler

#[Distributed]
#[CommandHandler("billing.changeDetails")]
public function changeBillingDetails(ChangeBillingDetails $command) : void
{
// do something with billing details
}

To expose command handler for service distribution mark it with Distributed attribute.

Run the consumer

Run consumer for your registered distributed consumer. It will be available under your Service Name

List:

Symfony
Laravel
Lite
Symfony
bin/console ecotone:list
+--------------------+
| Endpoint Names |
+--------------------+
| billings |
+--------------------+
Laravel
artisan ecotone:list
+--------------------+
| Endpoint Names |
+--------------------+
| billing |
+--------------------+
Lite
$consumers = $messagingSystem->list()

Run it:

Symfony
Laravel
Lite
Symfony
bin/console ecotone:run billing -vvv
Laravel
artisan ecotone:run billing -vvv
Lite
$messagingSystem->run("billing");

Publishing Distributed Events

  • routingKey - is a routing key under which event will be published

public function changeBillingDetails(DistributedBus $eventBus)
{
$eventBus->publishEvent(
"billing.detailsWereChanged", // routingKey
'{"personId":123,"billingDetails":0001}',
"application/json"
);
}

Consuming Distributed Events

#[Distributed]
#[EventHandler("billing.detailsWereChanged")]
public function registerTicket(BillingDetailsWereChanged $event) : void
{
// do something with event
}

To start listening for distributed events under specific key, provide Distributed attribute.

Run the consumer

Run it the same as for distributed command bus.