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gRPC on Android @DroidconSF Report
TakuSemba
November 20, 2017
Technology
1
280
gRPC on Android @DroidconSF Report
TakuSemba
November 20, 2017
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Transcript
gRPC on Android TakuSemba CyberAgent.Inc
@takusemba https://github.com/TakuSemba
Droidcon SF
None
What’s gRPC?
gRPC ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2
ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2 gRPC
ɾProtocol Buffers ɾRemote Procedure Call ɾHTTP/2 gRPC
What’s Protocol Buffers?
ɾBinary based transmission Protocol Buffers ɾAvailable for many languages ɾFaster
than Json
ɾBinary based transmission ɾAvailable for many languages ɾFaster than Json
Protocol Buffers
ɾBinary based transmission ɾAvailable for many languages ɾFaster than Json
Protocol Buffers
Protocol BuffersͰͷ௨৴jsonͱൺͯૣ͍ͷ͔ IUUQTRJJUBDPNUBLVTFNCBJUFNTGFBCEBEDFEEC
Let’s gRPC
message CoffeeRequest { string name = 1; } Request //coffee.proto
message CoffeeResponse { int32 price = 1; string name =
2; string message = 3; } Response //coffee.proto
service Coffee { rpc Order (CoffeeRequest) returns (CoffeeResponse) {} }
Service //coffee.proto
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) {} }
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
->% 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
->% 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
->% 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
Generate Proto Files
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
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 */ } )
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 */ } )
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 */ } )
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 */ } )
Demo
gRPC on Android https://github.com/takusemba https://twitter.com/takusemba