Want to learn more about Acquia’s products, services, and happenings in the Drupal Community? Visit our site: http://bit.ly/yLaHO5. Drupal 8 has introduced a number of new (to Drupalists) technologies, but embedded in this mix are a handful of Drupal-centric innovations. Amongst the first of these to be introduced to Drupal 8 was the Plug-in system. The Plug-in system is a far reaching PHP Component that has largely replaced the old hook_info/alter pattern within Drupal and can be used outside of Drupal as well. In this webinar, Kris Vanderwater (You may know him as EclipseGc) will review: • Examples of what appropriate plug-in system usages look like • What plug-in tools exist and how to leverage them • Where to get information on building your own plug-in types • How to use the existing helper classes in Drupal for the greatest impact We will compare and contrast how Drupal 7 versus Drupal 8 works for plugin converted subsystems to frame the discussion around when and why to build a conversion. In addition to this we will dig into the tools and classes Drupal provides out of the box, and dissect a simple example plug-in type that you can use to build your own plug-ins types and better understand the plug-in system. Experience level: Advanced

1. Drupal 8: Plugins
A visual and technical deep dive.
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Twitter session tag: #d8plugins

2. Kris Vanderwater
‣ Developer Evangelist, Acquia!
‣ Drupal 8: Scotch Initiative Owner!
‣ Twitter: @eclipsegc!
‣ Co-Maintainer: Chaos Tools!
‣ Maintainer: Contextual Administration

3. Drupal 8 Plugins: Topics
• What is a Plugin?
• Why Plugins?
• Benefits of Plugins
• Foundational Concepts
• Implementing Plugins
• Creating your own Plugin Type

4. Thank You
Helior Colorado

5. What is a Plugin?

6. What is a Plugin?
Helior’s Definition: A discreet class that
executes an operation within the
context of a given scope, as a means
to extend Drupal’s functionality.
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7. What is a Plugin?
Helior’s Definition: A discreet class that
executes an operation within the
context of a given scope, as a means
to extend Drupal’s functionality.
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Kris’ Definition: A discoverable class
that implements a particular interface
which adds or extends functionality to
a pluggable subsystem.

8. What is a Plugin?
• Discoverable

9. What is a Plugin?
• Discoverable!
• Object Oriented

10. What is a Plugin?
• Discoverable!
• Object Oriented!
• Interface Driven

11. What is a Plugin?
• Discoverable!
• Object Oriented!
• Interface Driven!
• Swappable

12. What is a Plugin?
• Discoverable!
• Object Oriented!
• Interface Driven!
• Swappable!
• Drupal not required

13. Why Plugins?

14. Why Plugins?
• Drupal actually is kinda unique

15. Why Plugins?
• Drupal actually is kinda unique!
• Unprecedented Configurability

16. Why Plugins?
• Drupal actually is kinda unique!
• Unprecedented Configurability!
• Absence of similar code

17. Why Plugins?
• Drupal actually is kinda unique!
• Unprecedented Configurability!
• Absence of similar code!
• Other CMS don’t expose as much

18. Why Plugins?
• Drupal actually is kinda unique!
• Unprecedented Configurability!
• Absence of similar code!
• Other CMS don’t expose as much!
• Frameworks expect it to be hard coded

19. Benefits of Plugins:

20. Benefits of Plugins:
• Definition & Implementation are co-located

21. Drupal 7 hook_block_info()

22. Drupal 7 hook_block_info()

23. Drupal 7 hook_block_view()

24. Drupal 7 hook_block_view()

25. Drupal 8 SystemPoweredByBlock

26. Benefits of Plugins:
• Definition & Implementation are co-located!
• Plugins are Object Oriented

27. Drupal 7 Block Hooks
• hook_block_info()!
• hook_block_info_alter()!
• hook_block_view()!
• hook_block_view_alter()!
• hook_block_view_MODULE_DELTA_alter()!
• hook_block_configure()!
• hook_block_save()

28. Drupal 8 BlockPluginInterface
• label()!
• access()!
• build()!
• blockForm()!
• blockValidate()!
• blockSubmit()!
• getMachineNameSuggestion()!
• getVisibilityConditions()!
• getVisibilityCondition()!
• setVisibilityConfig()

29. Methods not implemented by BlockBase
• label()!
• access()!
• build()!
• blockForm()!
• blockValidate()!
• blockSubmit()!
• getMachineNameSuggestion()!
• getVisibilityConditions()!
• getVisibilityCondition()!
• setVisibilityConfig()

30. Plugins are Extensible
• Inherit from base class!
• Inherit from other plugins

31. Drupal 8 SystemPoweredByBlock

33. Benefits of Plugins:
• Definition & Implementation are co-located!
• Plugins are Object Oriented!
• Plugins are Lazy Loaded by default

34. Drupal 7 Block Hooks
• hook_block_info()!
• hook_block_info_alter()!
• hook_block_view()!
• hook_block_view_alter()!
• hook_block_view_MODULE_DELTA_alter()!
• hook_block_configure()!
• hook_block_save()

35. Drupal 8 System Blocks!
Contents of core/modules/system/src/Plugin/Block
• SystemBrandingBlock.php!
• SystemBreadcrumbBlock.php!
• SystemHelpBlock.php!
• SystemMainBlock.php!
• SystemMenuBlock.php!
• SystemPoweredByBlock.php

36. Benefits of Plugins:
• Definition & Implementation are co-located!
• Plugins are Object Oriented!
• Plugins are Lazy Loaded by default!
• Common Pattern (Learn once, use every where)

37. Drupal 8 Core Plugin Types
• Actions
• Archivers
• Blocks
• CKEditor
Plugins
• Conditions
• Editors
• Entity
Reference
Selectors
• Field Types
• Tool Tips
• Views Access
• Views Area
• Views Argument
Defaults
• Views Argument
Validators
• Views Cache
• Views Displays
• Views Display
Extenders
• Views Exposed
Forms
• Field Formatters
• Field Widgets
• Filters
• Image Effects
• Mail
• Contextual Links
• Local Actions
• Local Tasks
• Quickedit
Editors
• Search
• Views Fields
• Views Filters
• Views Joins
• Views Pagers
• Views Queries
• Views
Relationships
• Views Rows
• Views Sorts
• Views Styles
• Views Wizards

38. Foundational Concepts:

39. Foundational Concepts:
• Autoloading

40. Foundational Concepts:
• Autoloading!
• PSR-0 & PSR-4

41. Autoloading Concepts:

42. Autoloading Concepts:
PSR-0
• DrupalCore => “core/lib/Drupal/Core”,!
• DrupalComponent => “core/lib/Drupal/Component”,

43. Autoloading Concepts:
PSR-0
• DrupalCore => “core/lib/Drupal/Core”,!
• DrupalComponent => “core/lib/Drupal/Component”,
PSR-4
• Drupalblock => “core/modules/block/src”,

44. Foundational Concepts:
• Autoloading!
• PSR-0 & PSR-4!
• Dependency Injection

45. Dependency Injection:

46. Foundational Concepts:
• Autoloading!
• PSR-0 & PSR-4!
• Dependency Injection!
• Service Containers

47. Service Containers:

48. Service Containers:

49. Service Containers:

50. Service Containers:

51. Service Containers:

52. Service Containers:

53. Service Containers:

54. Service Containers:

55. Service Containers: services.core.yml

56. Foundational Concepts:
• Autoloading!
• PSR-0 & PSR-4!
• Dependency Injection!
• Service Containers!
• Annotations

57. Annotations: @Block()

62. Annotations:
• Annotations are NOT CODE!

63. Annotations:
• Annotations are NOT CODE!!
• yaml, json, {insert_serializer} are NOT CODE!

64. Annotations:
• Annotations are NOT CODE!!
• yaml, json, {insert_serializer} are NOT CODE!!
• Annotations have more in common serialization.

65. Annotations:
• Annotations are NOT CODE!!
• yaml, json, {insert_serializer} are NOT CODE!!
• Annotations have more in common serialization.!
• Data not behavior.

66. To the Code!