Presentation about rg\injection, a PHP dependency injection container which is inspired by google guice.

1. rginjection
Bastian Hofmann

7. Questions? Ask!

8. Dependency Inversion

9. http://www.doolwind.com/blog/solid-principles-for-game-developers/

10. Dependencies

12. Dependency Injection

13. Constructor

15. Setter

17. Method argument

19. Constructing classes

21. Make it easier with factories

23. Dependency Injection Container

24. What‘s out there?

26. <?xml version="1.0" ?>
<container xmlns="http://symfony-project.org/2.0/container">
<parameters>
<parameter key="mailer.username">foo</parameter>
<parameter key="mailer.password">bar</parameter>
<parameter key="mailer.class">Zend_Mail</parameter>
</parameters>
<services>
<service id="mail.transport"
class="Zend_Mail_Transport_Smtp" shared="false">
<argument>smtp.gmail.com</argument>
<argument type="collection">
<argument key="auth">login</argument>
<argument key="username">%mailer.username%</argument>
<argument key="password">%mailer.password%</argument>
<argument key="ssl">ssl</argument>
<argument key="port">465</argument>
</argument>
</service>
<service id="mailer" class="%mailer.class%">
<call method="setDefaultTransport">
<argument type="service" id="mail.transport" />
</call>
</service>
</services>
</container>

27. rginjection
inspired by google-guice
http://code.google.com/p/google-guice/

28. Creating an instance of a class

31. Automatic creation of dependencies through Typehints

33. @inject

35. What classes can be injected?

36. No constructor

38. Constructor without arguments

40. Constructor with arguments that have default values

42. Injectable constructor

45. By the way: Property Injection

47. Singletons with public static getInstance method following
the same rules

49. STOP: Don‘t use Singeltons

50. Singletons are evil!

51. Let the DIC take care of instances

52. @singleton

54. By the way...

56. Passing additional, fixed values to instance

58. What about testing

59. Only test the class, not the dependencies

61. Mocking

64. Working with Interfaces

65. Why interfaces?

67. But we can not create an instance of an Interface!

68. @implementedBy

70. Mocking an interface

72. Named @implementedBy

75. What‘s that for?

76. Providers

77. @providedBy

80. Method invocation at DIC

82. Same rules

85. And if you don‘t like annotations...
... or want to integrate 3rd party code

88. Integrate it into your framework

89. Great! So, how does it work internally?

90. Development: Reflection

91. Production: Generated Factory Classes

92. DEMO

93. Available? very soon

94. h"p://twi"er.com/Bas2anHofmann
h"ps://profiles.google.com/bashofmann
h"p://lanyrd.com/people/Bas2anHofmann/
h"p://slideshare.net/bashofmann
mail@bas2anhofmann.de