README

Google App Engine(GAE) Support package for Lumen.

Currently supported features:

• Generation of general configuration files,
• Mail service provider,
• Queue service provider,
• Database connection,
• Filesystem.

For Laravel 5 see https://github.com/shpasser/GaeSupportL5.

Installation

Pull in 'shpasser/gae-support-lumen' and 'illuminate/mail' packages via Composer.

"require": {
    "shpasser/gae-support-lumen": "~1.0",
    "illuminate/mail": "~5.0"
}

Within bootstrap/app.php:

• Uncomment the following line in order to use the Facades

$app->withFacades();

• Include the service provider

$app->register(Shpasser\GaeSupportLumen\GaeSupportServiceProvider::class);

Usage

Generate the GAE related files / entries.

php artisan gae:setup --config --bucket="your-bucket-id" --db-socket="cloud-sql-instance-socket-connection-string" --db-name="cloud-sql-database-name" --db-host="cloud-sql-instance-ipv4-address" your-app-id

The default GCS bucket is configured unless a custom bucket id is defined using the --bucket option.

When --db-name option is defined at least one of --db-socket or --db-host should be defined also.

Mail

The mail driver configuration can be found in config/mail.php and .env.production, these configuration files are modified / generated by the artisan command. There is no need in any kind of custom configuration. All the outgoing mail messages are sent with sender address of an administrator of the application, i.e. admin@your-app-id.appspotmail.com. The sender, to, cc, bcc, replyTo, subject, body and attachment parts of email message are supported.

Queues

The modified queue configuration file config/queue.php should contain:

return array(

	...

	/*
	|--------------------------------------------------------------------------
	| GAE Queue Connection
	|--------------------------------------------------------------------------
	|
	*/

	'connections' => array(

		'gae' => array(
			'driver'	=> 'gae',
			'queue'		=> 'default',
			'url'		=> '/tasks',
			'encrypt'	=> true,
		),

		...

	),

);

The 'default' queue and encryption are used by default. In order to use the queue your app/Http/routes.php file should contain the following route:

Route::post('tasks', array('as' => 'tasks',
function()
{
	return Queue::marshal();
}));

This route will be used by the GAE queue to push the jobs. Please notice that the route and the GAE Queue Connection 'url' parameter point to the same URL. For more information on the matter please see http://laravel.com/docs/master/queues#push-queues.

Cache, Session and Log

Cache, Session and Log components are supported via the use of specific drivers / handlers:

• Cache - using the 'memcached' driver,
• Session - using the 'memcached' driver,
• Log - using 'syslog' handler.

The configuration options for the mentioned drivers / handlers are generated by the artisan command and can be found in .env.production configuration file.

Database

Google Cloud SQL is supported via Laravel's MySql driver. The connection configuration is added by the artisan command to config/database.php under cloudsql. The connection parameters can be configured using --db-socket, --db-name and --db-host options via the artisan command.

The database related environment variables are set in .env.production and .env.local files.

The production environment is configured to use the socket connection while the local configured to connect via the IPv4 address of the Google Cloud SQL instance. Use Google Developers Console in order to obtain the socket connection string and enable the IPv4 address of your database instance.

The migrations are supported while working in local environment only.

To use either the production or the local environment rename the appropriate file to .env.

Filesystem

In order to support Laravel filesystem on GAE the artisan command modifies config/filesystem.php to include an additional disk:

'gae' => [
    'driver' => 'gae',
    'root'   => storage_path().'/app',
],

and adds the following line to .env.production file:

FILESYSTEM = gae

The last but not the least, pull in 'league/flysystem' package via Composer.

"require": {
    "league/flysystem": "~1.0"
}

Optimizations

The optimizations allow the application to reduce the use of GCS, which is the only read-write storage available on GAE platform as of now.

In order to optimize view compilation the included cachefs filesystem can be used to store compiled views using memcached service. cachefs does not provide the application with a reliable storage solution, information stored using memcached is managed according to memcached rules and may be deleted when memcached decides to. Since the views can be compiled again without any information loss it is appropriate to store compiled views using cachefs.

'cachefs' has the following structure:

/
+-- framework
    +-- views

'/framework/views' is used to store the compiled views.

Use the following option to enable the feature in .env.production file:

COMPILED_PATH = cachefs://framework/views

Additionally the initialization of GSC bucket can be skipped to boost the performance:

env_variables:
        GAE_SKIP_GCS_INIT: true

the storage path will be set to /storage directory of the GCS bucket and storage directory structure creation will be skipped.

If not used the filesystem initialization can be removed to minimize GCS usage. In order to do so, remove the following line from .env.production file:

FILESYSTEM = gae

Deploy

Backup the existing .env file if needed and rename the generated .env.production to .env before deploying your app.

Download and install GAE SDK for PHP and deploy your app.