Container

Yet another service container

Container DOES NOT use reflection and type hint information in any form.

Features

Container keep two kind of values: services and parameters.

Service will instantiated when you call call it by name. Usually service is object type, but not nesessary. Mind it as "product" of some routine.

Methods: get() and set().

Parameters are not instantiating, they just stored and retrieved.

Methods: getParameter() and setParameter().

Install

To install with composer:

composer require artoodetoo/container

Basic Usage

Configuration

There are special configuraton sections:

• root used to store basic values, which can be substituted into service definition.
• shared node defines shared services. after it created once it can be retrieved many times.
• multiple node defines new instance created on every get() call

In other sections you can store any kind of information and retrieve it in dot notation (see below).

Simple service definition

use R2\DependencyInjection\Container;

$config = [
  'shared' => [
    'view' => R2\Templating\Dirk::class
  ]
];
$c = new Container($config);
$c->get('view')->render('index');

Parameters substitution

$config = [
  'ROOT'   => '\var\www\mysite',
  'PUBLIC' => '\var\www\mysite\public',
  'shared' => [
    'view' => [
      'class' => R2\Templating\Dirk::class,
      'options' => [
          'views' => '%ROOT%/views',
          'cache' => '%ROOT%/cache',
      ],
      ...
  ]
];
...
$c->get('view')->render('index');

Factory method

$config = [
  'shared' => [
    'userManager' => App\UserManager::class,
    'user' => '@userManager:getCurrentUser',
    ...
  ]
]
...
echo $c->get('user')->username;

Container injection

There are two ways to inject container into service instance:

1. Add interface R2\DependencyInjection\ContainerAwareInterface to service class and define setContainer() method.
2. Substitute container in constructor parameters. It is special name CONTAINER:

$config = [
  'shared' => [
    'example' => [
        'class' => Example::class,
        'container' => '%CONTAINER%',
    ],
  ]
];

Parameters and dot notation:

$config = [
  'options' => [
    'cookie' => [
      'name' => 'the-cookie',
      'domain' => '.example.com'
    ]
];
...
setcookie(
  $c->getParameter('options.cookie.name'),
  $value,
  0,
  '/',
  $c->getParameter('options.cookie.domain')
);

Notes and Limits

Any part of configuration can be read by getParameter, including special sections shared and multiple.

As for now, substitution patterns work in service production only.

Only parameters from config root can be used in substitution patterns.

License

The Container is open-source software, licensed under the MIT license