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@devconfpl @VladimirD_42 REST API vs gRPC Which One Should You Use in Breaking a Monolith Vladimir Dejanović @VladimirD_42 30th October 2018

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@VladimirD_42 Vladimir Dejanović Let’s Meet #VoxxedMicroservices @VladimirD_42 [email protected] http://itshark.xyz github.com/vladimir-dejanovic

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@VladimirD_42 Vladimir Dejanović Let’s Meet http://itshark.xyz #VoxxedMicroservices

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@VladimirD_42 Vladimir Dejanović Let’s Meet #VoxxedMicroservices

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@VladimirD_42 Vladimir Dejanović Let’s Meet and Others... #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices Agenda

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@VladimirD_42 #VoxxedMicroservices Agenda REST

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@VladimirD_42 #VoxxedMicroservices Agenda gRPC REST

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@VladimirD_42 #VoxxedMicroservices Agenda gRPC REST vs gRPC in breaking Monolith REST

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@VladimirD_42 #VoxxedMicroservices Agenda gRPC Questions REST vs gRPC in breaking Monolith REST

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@VladimirD_42 #VoxxedMicroservices What is REST?

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@VladimirD_42 #VoxxedMicroservices REST

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@VladimirD_42 #VoxxedMicroservices REST http://www.ics.uci.edu/~fielding/pubs/di ssertation/rest_arch_style.htm

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@VladimirD_42 #VoxxedMicroservices REST Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST Statelessness Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST Cacheability Statelessness Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST Cacheability Layered System Statelessness Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST Cacheability Code on Demand (Optional) Layered System Statelessness Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST Cacheability Code on Demand (Optional) Layered System Statelessness Uniform Interface Client-Server Architecture

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@VladimirD_42 #VoxxedMicroservices REST in Real Life

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@VladimirD_42 #VoxxedMicroservices REST in Real Life

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@VladimirD_42 #VoxxedMicroservices REST in Real Life

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@VladimirD_42 #VoxxedMicroservices REST in Real Life

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@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 { List findByLastName(@Param("name") String name); }

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@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 { List findByLastName(@Param("name") String name); }

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@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 { List findByLastName(@Param("name") String name); }

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@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 { List findByLastName(@Param("name") String name); }

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@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 { List findByLastName(@Param("name") String name); }

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices What is gRPC?

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@VladimirD_42 #VoxxedMicroservices gRPC gRPC Remote Procedure Call

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@VladimirD_42 #VoxxedMicroservices Remote Procedure Call

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@VladimirD_42 #VoxxedMicroservices Remote Procedure Call RMI

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@VladimirD_42 #VoxxedMicroservices Remote Procedure Call RMI CORBA

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@VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg

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@VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg

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@VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg

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@VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg

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@VladimirD_42 @devconfpl https://grpc.io/img/landing-2.svg

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@VladimirD_42 #VoxxedMicroservices gRPC C++

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Ruby

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Ruby C#

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C#

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C# Android Java

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP Dart

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@VladimirD_42 #VoxxedMicroservices gRPC C++ Java Python Go Node.js Ruby C# Objective-C Android Java PHP Dart

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC in breaking Monolith

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices ref:http://assets.bonappetit.com/photos/57d32e45bd794aa9132639a4/master/w_625,c_limit/lernert-sander-cubes-crop2.jpg

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Both support multiple Languages

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Both support multiple Languages REST support much more

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC https://grpc.io/

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC https://grpc.io/ https://github.com/grpc/grpc-java

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC REST support more than 4 types

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@VladimirD_42 #VoxxedMicroservices gRPC

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@VladimirD_42 #VoxxedMicroservices gRPC IDL

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Schema is “optional” in REST

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Schema is “optional” in REST REST code or schema first

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Schema is “optional” in REST REST code or schema first gRPC is schema first

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@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); } ...

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@VladimirD_42 #VoxxedMicroservices gRPC IDL HTTP/2

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC HTTP2 backed into gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC HTTP2 backed into gRPC Extra work “needed” for REST

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@VladimirD_42 #VoxxedMicroservices gRPC IDL HTTP/2 Protobuf 3

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@VladimirD_42 #VoxxedMicroservices Protocol Buffers http://itshark.xyz/posts/2018/7/11/P rotocol_Buffers_basic_stuff_you_nee d_to_know

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@VladimirD_42 #VoxxedMicroservices Protocol Buffers https://www.youtube.com/watch? v=oDIkgNchrVY

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC REST is not JSON over HTTP

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC JSON Proto

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC JSON Proto Proto JSON

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC JSON Proto

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC JSON Proto Proto JSON

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Protocol Buffer with REST

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@VladimirD_42 #VoxxedMicroservices Big Difference

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@VladimirD_42 #VoxxedMicroservices Big Difference REST is about Resources

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@VladimirD_42 #VoxxedMicroservices Big Difference REST is about Resources RPC is about Remote Procedure Calls

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices

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@VladimirD_42 #VoxxedMicroservices Demo Talking is boring!! Show Code

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@VladimirD_42 #VoxxedMicroservices gRPC code example https://github.com/vladimir-dejanovic/g rpc-bank-example

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Wild West

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Wild West Law & Order

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Wild West Law & Order REST

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Wild West Law & Order REST

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@VladimirD_42 #VoxxedMicroservices REST vs gRPC Wild West Law & Order gRPC REST

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@VladimirD_42 #VoxxedMicroservices Some Questions

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@VladimirD_42 #VoxxedMicroservices Some Questions Who will be consumers?

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@VladimirD_42 #VoxxedMicroservices Some Questions Who will be consumers? Mobile / Web / Other?

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@VladimirD_42 #VoxxedMicroservices Some Questions What is the use case?

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@VladimirD_42 #VoxxedMicroservices Some Questions What is the use case? CRUD or Other?

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@VladimirD_42 #VoxxedMicroservices Some Questions What are internal policies and rules?

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@VladimirD_42 #VoxxedMicroservices Some Questions What are internal policies and rules? Toward frameworks, protocols & others

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@VladimirD_42 #VoxxedMicroservices Some Questions What is the problem that you are solving?

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@VladimirD_42 #VoxxedMicroservices Thank You

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@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

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@VladimirD_42 Questions @VladimirD_42 [email protected] http://itshark.xyz #VoxxedMicroservices