What does GraphQL and Traditional REST API have in common? Shouldn't the GraphQL be connected to some graphs or similar? What is actually GraphQL all about? Join me in this talk, while I try to answer all this questions and much more. In this talk I will explain what GraphQL is, what are differences and similarities compared to more traditional REST API and show you this on working examples, since code worth more then words only ;)

1. GraphQL
vs
Traditional REST API
Vladimir DejanovićJavaDaya
05 May 2018
@VladimirD_42@javadayistanbul

2. Let’s Meet
@VladimirD_42
Vladimir Dejanović
@javadayistanbul

3. Let’s Meet
@VladimirD_42
Vladimir Dejanović
@javadayistanbul

4. Let’s Meet
@VladimirD_42
Vladimir Dejanović
@javadayistanbul

5. Let’s Meet
@VladimirD_42
Vladimir Dejanović and Others...
@javadayistanbul

6. Agenda
@VladimirD_42@javadayistanbul

7. Agenda
@VladimirD_42
REST
@javadayistanbul

8. Agenda
@VladimirD_42
REST
GraphQL
@javadayistanbul

9. Agenda
@VladimirD_42
REST
GraphQL vs REST
GraphQL
@javadayistanbul

10. Agenda
@VladimirD_42
REST
GraphQL vs REST
Questions
GraphQL
@javadayistanbul

11. @VladimirD_42
What is REST?
@javadayistanbul

12. REST
@VladimirD_42
http://www.ics.uci.edu/~fielding/pubs
/dissertation/rest_arch_style.htm
@javadayistanbul

13. REST
@VladimirD_42
Client-Server Architecture
@javadayistanbul

14. REST
@VladimirD_42
Client-Server Architecture
Statelessness
@javadayistanbul

15. REST
@VladimirD_42
Client-Server Architecture
Cacheability
Statelessness
@javadayistanbul

16. REST
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
@javadayistanbul

17. REST
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
@javadayistanbul

18. REST
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

19. REST in real life
@VladimirD_42@javadayistanbul

20. REST in real life
@VladimirD_42@javadayistanbul

21. REST in real life
@VladimirD_42@javadayistanbul

22. REST in real life
@VladimirD_42@javadayistanbul

23. Simple Blog
@VladimirD_42@javadayistanbul

24. Simple Blog
@VladimirD_42@javadayistanbul
Author
id
name

25. Simple Blog
@VladimirD_42@javadayistanbul
Author
id
name
Post
id
title
body
authorId

26. Simple Blog
@VladimirD_42@javadayistanbul
Author
id
name
Post
id
title
body
authorId
Comment
id
text
postId
authorId

27. Simple Blog
@VladimirD_42@javadayistanbul

28. Simple Blog REST Code
@VladimirD_42@javadayistanbul
https://github.com/vladimir-dejanovic/graphql
-vs-traditional-rest-api-conftalk_demo
Tag: rest-0.1

29. @VladimirD_42
What is GraphQL?
@javadayistanbul

30. GraphQL
@VladimirD_42@javadayistanbul
GraphQL is a query language
for APIs

31. @VladimirD_42
GraphQL
is
specification
@javadayistanbul

32. GraphQL
@VladimirD_42@javadayistanbul
graphql-java

33. GraphQL
@VladimirD_42@javadayistanbul
Talking is boring
Show Code

34. Simple Blog GraphQL Code
@VladimirD_42@javadayistanbul
https://github.com/vladimir-dejanovic/graphql
-vs-traditional-rest-api-conftalk_demo
Tag: graphql-0.1

35. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

36. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

37. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

38. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

39. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

40. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

41. GraphQL
@VladimirD_42
Client-Server Architecture
Cacheability
Layered System
Statelessness
Code on Demand (Optional)
Uniform Interface
@javadayistanbul

42. REST
@VladimirD_42
Schema optional
@javadayistanbul

43. REST
@VladimirD_42
Schema optional
@javadayistanbul
Good practice, but still optional

44. GraphQL
@VladimirD_42
Schema is mandatory
@javadayistanbul

45. GraphQL
@VladimirD_42@javadayistanbul

46. GraphQL
@VladimirD_42@javadayistanbul

47. GraphQL
@VladimirD_42@javadayistanbul

48. GraphQL
@VladimirD_42@javadayistanbul

49. GraphQL
@VladimirD_42@javadayistanbul

50. GraphQL
@VladimirD_42@javadayistanbul

51. @VladimirD_42@javadayistanbul
ref: https://i0.wp.com/keyholesoftware.com/wp-content/uploads/HATEOAS.png
REST

52. Simple Blog GraphQL Code
@VladimirD_42@javadayistanbul
https://github.com/vladimir-dejanovic/graphql
-vs-traditional-rest-api-conftalk_demo
Tag: graphql-0.2

53. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

54. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

55. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

56. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

57. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

58. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

59. Simple Blog GraphQL Code
@VladimirD_42@javadayistanbul
https://github.com/vladimir-dejanovic/graphql
-vs-traditional-rest-api-conftalk_demo
Tag: graphql-0.3

60. GraphQL
@VladimirD_42@javadayistanbul
GraphQL is a query language
for APIs

61. GraphQL
@VladimirD_42@javadayistanbul
API

62. GraphQL
@VladimirD_42@javadayistanbul
Powerful query language

63. GraphQL
@VladimirD_42@javadayistanbul
Client call the shots

64. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

65. GraphQL
@VladimirD_42@javadayistanbul
Post
Comment
Author

66. @VladimirD_42
Abuse of GraphQL
query {
allPosts {
title
comments {
text
createdBy {
name
posts {
title
comments {
text
@javadayistanbul

67. @VladimirD_42
Abuse of GraphQL
query {
allPosts {
title
comments {
text
createdBy {
name
posts {
title
comments {
text
@javadayistanbul

68. Protect from Abuse
@VladimirD_42@javadayistanbul

69. Protect from Abuse
@VladimirD_42
Time out
@javadayistanbul

70. Protect from Abuse
@VladimirD_42
Time out
@javadayistanbul
Max Query Depth

71. Protect from Abuse
@VladimirD_42
Time out
@javadayistanbul
Max Query Depth
Max Query Complexity

72. Protect from Abuse
@VladimirD_42
Time out
@javadayistanbul
Max Query Depth
Max Query Complexity
Throttling

73. GraphQL query language for API
@VladimirD_42@javadayistanbul

74. GraphQL query language for API
@VladimirD_42
Query
@javadayistanbul

75. GraphQL query language for API
@VladimirD_42
Query
@javadayistanbul
Mutation

76. Simple Blog GraphQL Code
@VladimirD_42@javadayistanbul
https://github.com/vladimir-dejanovic/graphql
-vs-traditional-rest-api-conftalk_demo
Tag: graphql-0.4

77. GraphQL query language for API
@VladimirD_42
Query
@javadayistanbul
Mutation
Subscription

78. GraphQL questions to ask
@VladimirD_42@javadayistanbul

79. GraphQL questions to ask
@VladimirD_42@javadayistanbul
Error Responses

80. GraphQL questions to ask
@VladimirD_42@javadayistanbul
Error Responses
Performance & Cache

81. GraphQL questions to ask
@VladimirD_42@javadayistanbul
Error Responses
Performance & Cache
Authentication & Authorisation

82. @VladimirD_42
GraphQL
vs
Traditional REST API
@javadayistanbul

83. GraphQL vs Traditional REST API
@VladimirD_42
Similar, but different
@javadayistanbul

84. GraphQL vs Traditional REST API
@VladimirD_42
Similar, but different
@javadayistanbul
Tools & knowledge

85. GraphQL vs Traditional REST API
@VladimirD_42
Similar, but different
@javadayistanbul
Tools & knowledge
“Old Tricks” can be used

86. GraphQL vs Traditional REST API
@VladimirD_42@javadayistanbul
GraphQL rich SDL

87. GraphQL vs Traditional REST API
@VladimirD_42@javadayistanbul
GraphQL rich SDL
GraphQL powerful Query Lang

88. @VladimirD_42
Thank You
@javadayistanbul

89. Questions
@VladimirD_42
@VladimirD_42
vladimir@itshark.xyz
@javadayistanbul