gRPC on Android @DroidconSF Report

Transcript

1. gRPC on Android
   TakuSemba
   CyberAgent.Inc
   

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

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3. Droidcon SF
   

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5. What’s gRPC?
   

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6. gRPC
   ɾProtocol Buffers
   ɾRemote Procedure Call
   ɾHTTP/2
   

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7. ɾProtocol Buffers
   ɾRemote Procedure Call
   ɾHTTP/2
   gRPC
   

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8. ɾProtocol Buffers
   ɾRemote Procedure Call
   ɾHTTP/2
   gRPC
   

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9. What’s Protocol Buffers?
   

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

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

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

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13. Protocol BuffersͰͷ௨৴͸jsonͱൺ΂ͯૣ͍ͷ͔
    IUUQTRJJUBDPNUBLVTFNCBJUFNTGFBCEBEDFEEC
    

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14. Let’s gRPC
    

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

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16. message CoffeeResponse {
    
    int32 price = 1;
    
    string name = 2;
    
    string message = 3;
    
    }
    Response
    //coffee.proto
    

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17. service Coffee {
    
    rpc Order (CoffeeRequest) returns (CoffeeResponse) {}
    
    }
    Service
    //coffee.proto
    

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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) {}
    
    }
    

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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
    

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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
    

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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
    

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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
    

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23. Generate Proto Files
    

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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
    

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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 {
    it.onSuccess(stub.order(request))
    }.subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(
    { /** do something */ },
    { /** error handling */ }
    )
    

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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 {
    it.onSuccess(stub.order(request))
    }.subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(
    { /** do something */ },
    { /** error handling */ }
    )
    

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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 {
    it.onSuccess(stub.order(request))
    }.subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(
    { /** do something */ },
    { /** error handling */ }
    )
    

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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 {
    it.onSuccess(stub.order(request))
    }.subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(
    { /** do something */ },
    { /** error handling */ }
    )
    

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29. Demo
    

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

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