gRPC for Android - Speaker Deck

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H31$GPS"OESPJE !XBTBCFFG@KQ

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"CPVU.F @wasabeef_jp CyberAgent, Inc.

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8IBUJTH31$

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)551

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)551 • Binary • Multiplexed • Server Push • Header compression

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-BOHVBHFT

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-BOHVBHFT • C/C++ • C# • Java • Go • Objective-c • Node.js • PHP • Python • Ruby

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8IBUJT 1SPUPDPM#VFST

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1SPUPDPM#VFST • IDL • Binary • Support code generation (protoc)

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VTFSKTPO { id: 1, name: “wasabeef”, createdAt: “20150808” }

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VTFSQSPUP syntax = "proto3"; package user; message Proﬁle { string id = 1; string name = 2; int64 createdAt = 3; }

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QSPUPCVG

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*OTUBMM # git clone git@github.com:google/protobuf.git # cd protobuf # git checkout v3.0.0-alpha-3.1 # ./autogen.sh # ./conﬁgure # make # make check # sudo make install

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*OTUBMM # protoc --version libprotoc 3.0.0

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3FUSPU

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$POWFSUFS

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$POWFSUFST • GSON • Jackson • Moshi • Protobuf • Simplexml • Wire

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1SPUP$POWFSUFS Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://api.example.com") .converter(new ProtoConverter()) .build();

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0UIFST • Wire (Square) • FlatBuﬀers (Google) • Message Pack (Sadayuki Furuhashi)

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6TFH31$

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FDIPQSPUP syntax = "proto3"; option java_package = “jp.wasabeef.proto.echo”; option go_package = "echo"; package echo; message EchoRequest { string message = 1; } message EchoReply { string message = 1; } service Echo { rpc Echo (EchoRequest) returns (EchoReply) {} }

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$PEFHFOFSBUJPO • protobuf-gradle-plugin • (protoc) • (protoc-gen-grpc-java)

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HSQDKBWB

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%FQFOEFODJFT compile 'io.grpc:grpc-all:x.y.z'

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TBNQMF AsyncSubject subject = AsyncSubject.create(); new Thread(() -> { Channel channel = OkHttpChannelBuilder.forAddress(“grpc.wasabeef.jp”, 8443)  .setConnectionSpec(ConnectionSpec.MODERN_TLS)  .sslSocketFactory((SSLSocketFactory)SSLSocketFactory.getDefault())  .build();    EchoGrpc.EchoBlockingStub stub = EchoGrpc.newBlockingStub(channel);   Echo.EchoRequest req = new Echo.EchoRequest();  req.setMessage(“YES YES YES!");   Echo.EchoReply reply = stub.echo(req);  subject.onNext(reply.getMessage());  subject.onCompleted();  }).start();    subject.observeOn(AndroidSchedulers.mainThread()).subscribe(msg -> {  Log.d(“ECHO LOG” ,msg);  });