REST API vs gRPC, Which One Should You Use in Breaking a Monolith [DevConf 2018]

You heard of “new thing” called gRPC and promises that it will solve all issues for you, so now you are not sure if you should use it for breaking up your monolith to Microservices. If it is good for Google it should be good for you also right?On the other hand, you have been using REST API’s for some time now, at least as a consumer, so maybe this would be better approach in Microservices waters, or would it?

Which one to chose and which one will fit your use case better?

Join me in this talk were I will try to explain both approaches, good and bad. I will give some points and tips, which will help you in understanding better which one will be better for you. By doing this I will also share some best practices for both approaches.

Transcript

1. @devconfpl @VladimirD_42 REST API vs gRPC Which One Should You Use in Breaking a Monolith Vladimir Dejanović @VladimirD_42
2. @VladimirD_42 Vladimir Dejanović Let’s Meet @VladimirD_42 vladimir@itshark.xyz http://itshark.xyz @devconfpl
3. @VladimirD_42 Vladimir Dejanović Let’s Meet http://itshark.xyz @devconfpl
4. @VladimirD_42 Vladimir Dejanović Let’s Meet @devconfpl
5. @VladimirD_42 Vladimir Dejanović Let’s Meet and Others... @devconfpl
6. @VladimirD_42 @devconfpl Agenda
7. @VladimirD_42 @devconfpl Agenda REST
8. @VladimirD_42 @devconfpl Agenda gRPC REST
9. @VladimirD_42 @devconfpl Agenda gRPC REST vs gRPC in breaking Monolith REST
10. @VladimirD_42 @devconfpl Agenda gRPC Questions REST vs gRPC in breaking Monolith REST
11. @VladimirD_42 @devconfpl What is REST?
12. @VladimirD_42 @devconfpl REST
13. @VladimirD_42 @devconfpl REST http://www.ics.uci.edu/~fielding/pubs/di ssertation/rest_arch_style.htm
14. @VladimirD_42 @devconfpl REST Client-Server Architecture
15. @VladimirD_42 @devconfpl REST Statelessness Client-Server Architecture
16. @VladimirD_42 @devconfpl REST Cacheability Statelessness Client-Server Architecture
17. @VladimirD_42 @devconfpl REST Cacheability Layered System Statelessness Client-Server Architecture
18. @VladimirD_42 @devconfpl REST Cacheability Code on Demand (Optional) Layered System Statelessness Client-Server Architecture
19. @VladimirD_42 @devconfpl REST Cacheability Code on Demand (Optional) Layered System Statelessness Uniform Interface Client-Server Architecture
20. @VladimirD_42 @devconfpl REST in Real Life
21. @VladimirD_42 @devconfpl REST in Real Life
22. @VladimirD_42 @devconfpl REST in Real Life
23. @VladimirD_42 @devconfpl REST in Real Life
24. @VladimirD_42 @devconfpl REST in Real Life import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; @RepositoryRestResource(collectionResourceRel = "people", path = "people") public interface PersonRepository extends MongoRepository<Person, String> { List<Person> findByLastName(@Param("name") String name); }
25. @VladimirD_42 @devconfpl REST in Real Life import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; @RepositoryRestResource(collectionResourceRel = "people", path = "people") public interface PersonRepository extends MongoRepository<Person, String> { List<Person> findByLastName(@Param("name") String name); }
26. @VladimirD_42 @devconfpl REST in Real Life import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; @RepositoryRestResource(collectionResourceRel = "people", path = "people") public interface PersonRepository extends MongoRepository<Person, String> { List<Person> findByLastName(@Param("name") String name); }
27. @VladimirD_42 @devconfpl REST in Real Life import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; @RepositoryRestResource(collectionResourceRel = "people", path = "people") public interface PersonRepository extends MongoRepository<Person, String> { List<Person> findByLastName(@Param("name") String name); }
28. @VladimirD_42 @devconfpl REST in Real Life import org.springframework.data.mongodb.repository.MongoRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; @RepositoryRestResource(collectionResourceRel = "people", path = "people") public interface PersonRepository extends MongoRepository<Person, String> { List<Person> findByLastName(@Param("name") String name); }
29. @VladimirD_42 @devconfpl
30. @VladimirD_42 @devconfpl What is gRPC?
31. @VladimirD_42 @devconfpl gRPC gRPC Remote Procedure Call
32. @VladimirD_42 @devconfpl Remote Procedure Call
33. @VladimirD_42 @devconfpl Remote Procedure Call RMI
34. @VladimirD_42 @devconfpl Remote Procedure Call RMI CORBA
35. @VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg
36. @VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg
37. @VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg
38. @VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg
39. @VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg
40. @VladimirD_42 @devconfpl gRPC C++
41. @VladimirD_42 @devconfpl gRPC C++ Java
42. @VladimirD_42 @devconfpl gRPC C++ Java Python
43. @VladimirD_42 @devconfpl gRPC C++ Java Python Go
44. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Ruby
45. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Ruby C#
46. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C#
47. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C# Android Java
48. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java
49. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP
50. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP Dart
51. @VladimirD_42 @devconfpl gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP Dart
52. @VladimirD_42 @devconfpl REST vs gRPC in breaking Monolith
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56. @VladimirD_42 @devconfpl ref:http://assets.bonappetit.com/photos/57d32e45bd794aa9132639a4/master/w_625,c_limit/lernert-sander-cubes-crop2.jpg
57. @VladimirD_42 @devconfpl REST vs gRPC
58. @VladimirD_42 @devconfpl REST vs gRPC
59. @VladimirD_42 @devconfpl REST vs gRPC
60. @VladimirD_42 @devconfpl REST vs gRPC Both support multiple Languages
61. @VladimirD_42 @devconfpl REST vs gRPC Both support multiple Languages REST support much more
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64. @VladimirD_42 @devconfpl REST vs gRPC https://grpc.io/
66. @VladimirD_42 @devconfpl REST vs gRPC https://grpc.io/ https://github.com/grpc/grpc-java
67. @VladimirD_42 @devconfpl gRPC
68. @VladimirD_42 @devconfpl gRPC
69. @VladimirD_42 @devconfpl gRPC
70. @VladimirD_42 @devconfpl gRPC
71. @VladimirD_42 @devconfpl gRPC
72. @VladimirD_42 @devconfpl gRPC
73. @VladimirD_42 @devconfpl gRPC
74. @VladimirD_42 @devconfpl gRPC
75. @VladimirD_42 @devconfpl gRPC
76. @VladimirD_42 @devconfpl REST vs gRPC REST support more than 4 types
77. @VladimirD_42 @devconfpl gRPC
78. @VladimirD_42 @devconfpl gRPC IDL
79. @VladimirD_42 @devconfpl REST vs gRPC Schema is “optional” in REST
80. @VladimirD_42 @devconfpl REST vs gRPC Schema is “optional” in REST REST code or schema first
81. @VladimirD_42 @devconfpl REST vs gRPC Schema is “optional” in REST REST code or schema first gRPC is schema first
82. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
83. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
84. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
85. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
86. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
87. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
88. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
89. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
90. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
91. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
92. @VladimirD_42 @devconfpl ... message TransferMoney { int32 trans_id = 1; int32 from_account_number = 2; int32 to_account_number = 3; double ammount = 4; string message = 5; } service Bank { rpc Transfer(TransferMoney) returns (TransferConfirmation); rpc ListenToNotifications(Account) returns (stream AccountNotification); rpc RequestTransfer(stream RequestMoney) returns (stream RequestStatus); } ...
93. @VladimirD_42 @devconfpl gRPC IDL HTTP/2
94. @VladimirD_42 @devconfpl REST vs gRPC HTTP2 backed into gRPC
95. @VladimirD_42 @devconfpl REST vs gRPC HTTP2 backed into gRPC Extra work “needed” for REST
96. @VladimirD_42 @devconfpl gRPC IDL HTTP/2 Protobuf 3
97. @VladimirD_42 @devconfpl Protocol Buffers http://itshark.xyz/posts/2018/7/11/P rotocol_Buffers_basic_stuff_you_nee d_to_know
98. @VladimirD_42 @devconfpl Protocol Buffers https://www.youtube.com/watch? v=oDIkgNchrVY
99. @VladimirD_42 @devconfpl REST vs gRPC REST is not JSON over HTTP
100. @VladimirD_42 @devconfpl REST vs gRPC JSON Proto
101. @VladimirD_42 @devconfpl REST vs gRPC JSON Proto Proto JSON
102. @VladimirD_42 @devconfpl REST vs gRPC JSON Proto
103. @VladimirD_42 @devconfpl REST vs gRPC JSON Proto Proto JSON
104. @VladimirD_42 @devconfpl REST vs gRPC Protocol Buffer with REST
105. @VladimirD_42 @devconfpl Big Difference
106. @VladimirD_42 @devconfpl Big Difference REST is about Resources
107. @VladimirD_42 @devconfpl Big Difference REST is about Resources RPC is about Remote Procedure Calls
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120. @VladimirD_42 @devconfpl gRPC code example https://github.com/vladimir-dejanovic/g rpc-bank-example
121. @VladimirD_42 @devconfpl REST vs gRPC
122. @VladimirD_42 @devconfpl REST vs gRPC
123. @VladimirD_42 @devconfpl REST vs gRPC Wild West
124. @VladimirD_42 @devconfpl REST vs gRPC Wild West Law & Order
125. @VladimirD_42 @devconfpl REST vs gRPC Wild West Law & Order REST
126. @VladimirD_42 @devconfpl REST vs gRPC Wild West Law & Order REST
127. @VladimirD_42 @devconfpl REST vs gRPC Wild West Law & Order gRPC REST
128. @VladimirD_42 @devconfpl Some Questions
129. @VladimirD_42 @devconfpl Some Questions Who will be consumers?
130. @VladimirD_42 @devconfpl Some Questions Who will be consumers? Mobile / Web / Other?
131. @VladimirD_42 @devconfpl Some Questions What is the use case?
132. @VladimirD_42 @devconfpl Some Questions What is the use case? CRUD or Other?
133. @VladimirD_42 @devconfpl Some Questions What are internal policies and rules?
134. @VladimirD_42 @devconfpl Some Questions What are internal policies and rules? Toward frameworks, protocols & others
135. @VladimirD_42 @devconfpl Some Questions What is the problem that you are solving?
136. @VladimirD_42 @devconfpl Thank You
137. @VladimirD_42 @devconfpl https://github.com/grpc/grpc-java https://www.youtube.com/watch?v=oDIkgNchrVY http://itshark.xyz/posts/2018/7/11/Protocol_Buffers_basic _stuff_you_need_to_know https://grpc.io/ https://github.com/vladimir-dejanovic/grpc-bank-example http://www.ics.uci.edu/~fielding/pubs/dissertation /rest_arch_style.htm
138. @VladimirD_42 Questions @VladimirD_42 vladimir@itshark.xyz http://itshark.xyz @devconfpl