gRPC on Android @DroidconSF Report

Transcript

1. gRPC on Android TakuSemba CyberAgent.Inc

2. @takusemba https://github.com/TakuSemba

3. Droidcon SF

4. None

5. What’s gRPC?

6. gRPC ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2

7. ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2 gRPC

8. ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2 gRPC

9. What’s Protocol Buffers?

10. ɾBinary based transmission Protocol Buffers ɾAvailable for many languages ɾFaster

    than Json

11. ɾBinary based transmission ɾAvailable for many languages ɾFaster than Json

    Protocol Buffers

12. ɾBinary based transmission ɾAvailable for many languages ɾFaster than Json

    Protocol Buffers

13. Protocol BuffersͰͷ௨৴͸jsonͱൺ΂ͯૣ͍ͷ͔ IUUQTRJJUBDPNUBLVTFNCBJUFNTGFBCEBEDFEEC

14. Let’s gRPC

15. message CoffeeRequest { string name = 1; } Request //coffee.proto

16. message CoffeeResponse { int32 price = 1; string name =

    2; string message = 3; } Response //coffee.proto

17. service Coffee { rpc Order (CoffeeRequest) returns (CoffeeResponse) {} }

    Service //coffee.proto

18. Service service Coffee { rpc Order (CoffeeRequest) returns (CoffeeResponse) {}

    } service Coffee { rpc Order (stream CoffeeRequest) returns (CoffeeResponse) {} } service Coffee { rpc Order (CoffeeRequest) returns (stream CoffeeResponse) {} } service Coffee { rpc Order (stream CoffeeRequest) returns (stream CoffeeResponse) {} }

19. syntax = "proto3"; option java_package = "com.takusemba.grpc.android.protos"; option go_package =

    "protos"; package Coffee; message CoffeeRequest { string name = 1; } message CoffeeResult { string message = 1; } service Coffee { rpc Order (CoffeeRequest) returns (CoffeeResult) {} } //coffee.proto

20. ->% curl -OL https://github.com/google/protobuf/releases/download/v3.5.0/ protobuf-java-3.5.0.tar.gz ->% tar -zxvf protobuf-java-3.5.0.tar.gz ->%

    cd protobuf-3.5.0 ->% ./configure ->% make ->% sudo make install ->% protoc —version // -> libprotoc 3.5.0 :) //protoc

21. ->% git clone git@github.com:grpc/grpc-java.git ->% cd grpc-java ->% git checkout

    -b v1.7.0 ->% cd compiler ->% make ->% ../gradlew java_pluginExecutable ->% cp build/exe/java_plugin/protoc-gen-grpc-java /usr/local/bin //protoc-gen-grpc-java

22. ->% protoc coffee.proto --grpc-java_out=lite:. --java_out=. --plugin=protoc-gen- grpc-java=/usr/local/bin/protoc-gen-grpc-java //generate proto files

    for client ->% protoc --go_out=plugins=grpc:. coffee.proto //generate proto files for server Generate Proto Files

23. Generate Proto Files

24. gRPC on Android classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.2' implementation "io.grpc:grpc-okhttp:1.7.0" implementation "io.grpc:grpc-protobuf:1.7.0" implementation

    "io.grpc:grpc-stub:1.7.0" implementation "javax.annotation:javax.annotation-api:1.2" //build.gradle //app/build.gradle

25. gRPC on Android val channel = ManagedChannelBuilder.forAddress("10.0.2.2", 8080) .usePlaintext(true) .build()

    val stub = CoffeeGrpc.newBlockingStub(channel) val request = CoffeeOuterClass.CoffeeRequest.newBuilder() .setName(“hot coffee") .build() Single .create<CoffeeOuterClass.CoffeeResponse> { it.onSuccess(stub.order(request)) }.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { /** do something */ }, { /** error handling */ } )

26. gRPC on Android val channel = ManagedChannelBuilder.forAddress("10.0.2.2", 8080) .usePlaintext(true) .build()

    val stub = CoffeeGrpc.newBlockingStub(channel) val request = CoffeeOuterClass.CoffeeRequest.newBuilder() .setName(“hot coffee") .build() Single .create<CoffeeOuterClass.CoffeeResponse> { it.onSuccess(stub.order(request)) }.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { /** do something */ }, { /** error handling */ } )

27. gRPC on Android val channel = ManagedChannelBuilder.forAddress("10.0.2.2", 8080) .usePlaintext(true) .build()

    val stub = CoffeeGrpc.newBlockingStub(channel) val request = CoffeeOuterClass.CoffeeRequest.newBuilder() .setName(“hot coffee") .build() Single .create<CoffeeOuterClass.CoffeeResponse> { it.onSuccess(stub.order(request)) }.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { /** do something */ }, { /** error handling */ } )

28. gRPC on Android val channel = ManagedChannelBuilder.forAddress("10.0.2.2", 8080) .usePlaintext(true) .build()

    val stub = CoffeeGrpc.newBlockingStub(channel) val request = CoffeeOuterClass.CoffeeRequest.newBuilder() .setName(“hot coffee") .build() Single .create<CoffeeOuterClass.CoffeeResponse> { it.onSuccess(stub.order(request)) }.subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { /** do something */ }, { /** error handling */ } )

29. Demo

30. gRPC on Android https://github.com/takusemba https://twitter.com/takusemba