README

A Symfony Bundle to use when you want to assert that messages used with Message brokers such like RabbitMQ are compliant with the Zero Downtime Deployment.

Getting started

Installation

First, install the bundle with composer:

$ composer require yousign/zdd-message-bundle

Then, verify that the bundle has been registered in config/bundles.php:

Yousign\ZddMessageBundle\ZddMessageBundle::class => ['all' => true],

Configuration

Create a class to configure the messages to assert and how to create them:

<?php

namespace App\Message;

use Yousign\ZddMessageBundle\Config\CustomMessageGeneratorInterface;
use Yousign\ZddMessageBundle\Config\ZddMessageConfigInterface;

class MessageConfig implements ZddMessageConfigInterface, CustomMessageGeneratorInterface
{
    /**
     * Return the list of messages to assert.
     */
    #[\Override]
    public function getMessageToAssert(): array
    {
        return [
            App\Message\MyMessage::class,
            App\Message\AnotherMessage::class,
            //...
        ];
    }

    /**
     * If your message contains no scalar value as parameter such like value enums, value object more complex object,
     * you should use this method to return value for each type hint.
     */
    #[\Override]
    public function generateValueForCustomPropertyType(string $type): mixed
    {
        return match ($type) {
            'App\ValueObject\Email' => new App\ValueObject\Email('dummy@email.fr'),
            'App\Enum\MyEnum' => App\Enum\MyEnum::MY_VALUE,
            default => null,
        };
    }

    /**
     * Optional: Implement CustomMessageGeneratorInterface if you need full control
     * over how a specific message instance is created.
     * This is useful when the default instantiation (using reflection and property injection)
     * is not sufficient or when your message requires specific constructor logic.
     *
     * WARNING: The object must be instantiated with minimum requirements (i.e., nullable properties
     * must be set as null) in order to ensure a good ZDD test.
     */
    #[\Override]
    public function generateCustomMessage(string $className): ?object
    {
        return match ($className) {
            App\Message\ComplexMessage::class => new App\Message\ComplexMessage('custom data'),
            default => null,
        };
    }
}

Then, register this class as a service.

# config/services.yaml
  App\Message\MessageConfig:

Finish by updating the configuration with this new service in config/packages/zdd_message.yaml:

# config/packages/zdd_message.yaml
  zdd_message:
    message_config_service: App\Message\MessageConfig

Optional configuration

Use a custom serializer

Option to use different serializer. Possible options:

• Yousign\ZddMessageBundle\Serializer\ZddMessageMessengerSerializer (default, already configured for messenger serialization in messenger.yaml)
• Define your own serializer
  • Create a service that implement Yousign\ZddMessageBundle\Serializer\SerializerInterface
  • Use it in the configuration

# config/packages/zdd_message.yaml
  zdd_message:
    serializer: '<your-service-id>'

Custom directory for serialized messages

Option to specify a custom directory where serialized messages will be stored.

# config/packages/zdd_message.yaml
zdd_message:
  # ...
  serialized_messages_dir: '%kernel.project_dir%/custom/path' # Default: '%kernel.project_dir%/var/zdd-message'

Detect messages not tracked

Option to write a log message if an asynchronous message has been sent (using symfony messenger) and is not present in your configuration.

# config/packages/zdd_message.yaml
zdd_message:
  # ...
  log_untracked_messages:
    messenger:
      enable: true # false by default
      level: 'error' # warning by default

Usage

The bundle comes with commands to assert that your messages are compliant with the Zero Downtime Deployment:

$ bin/console yousign:zdd-message:generate # Generate serialized messages in files.
$ bin/console yousign:zdd-message:validate # Assert that the messages are compliant by deserializing them from files and call the properties.
$ bin/console yousign:zdd-message:debug # Output all tracked messages.

💡 You should run bin/console yousign:zdd-message:generate with the production version code and bin/console yousign:zdd-message:validate with the version code you want to merge.

Example from the version you want to merge:

$ git checkout [production_version]
$ bin/console yousign:zdd-message:generate
$ git checkout - # Go back to the version you want to merge
$ bin/console yousign:zdd-message:validate

💡 Use verbose mode to see error details

$ bin/console yousign:zdd-message:validate -vv
--- ------------------------------------------------------------------- ---------------- 
#   Message                                                             ZDD Compliant?  
--- ------------------------------------------------------------------- ---------------- 
1   Yousign\ZddMessageBundle\Tests\Fixtures\App\Messages\DummyMessage   No ❌           
--- ------------------------------------------------------------------- ---------------- 

! [NOTE] 1 error(s) triggered.                                                                                         

------------------------------------------------------------------- -------------- 
Message                                                             Error         
------------------------------------------------------------------- -------------- 
Yousign\ZddMessageBundle\Tests\Fixtures\App\Messages\DummyMessage   Syntax error  
------------------------------------------------------------------- --------------

Contributing

Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.

After writing your fix/feature, you can run following commands to make sure that everything is still ok.

# Install dev dependencies
$ composer install

# Running tests and quality tools locally
$ make all

If you want to use your local fork to develop in your projects, you can use the link command to replace the vendor installation by your local version.

$ ./link /home/yousign/dev/my-project

Authors

• Smaine Milianni - ismail1432 - <smaine(dot)milianni@gmail(dot)com>
• Simon Mutricy - Inkod - <ink0d@pm(dot)me>