REST API vs gRPC, which one should you use in breaking a monolith [Voxxed Days Microservices 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

Code: https://github.com/vladimir-dejanovic/grpc-bank-example

Transcript

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