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gRPC @MoyuruAizawa

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Ѫᖒ๖ (Moyuru Aizawa) MoyuruAizawa Contract Developer Pairs Div. Eureka, Inc. FRESH! Div. CyberAgent, Inc.

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‣ Live Streaming ‣ Upcoming ‣ Live ‣ Pause ‣ … FRESH!

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FRESH!

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Polling

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause

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Polling Client Server Live Pause ແବ!

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Polling Client Server Live Pause ஗͍!!

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gRPC

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‣ Google ‣ Remote Procedure Call ‣ HTTP/2 ‣ ѹॖϔομʔ ‣ αʔόʔϓογϡ ‣ Protocol Buffers ‣ ετϦʔϜ ‣ … gRPC

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gRPC

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gRPC Channel(OkHttp2) Binary data

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gRPC Serialize/Deserialize
 … FooServiceStub

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Plasma

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‣ FRESH!։ൃ ‣ gRPC Stream, Server Sent EventΛ༻͍ͨ൚༻తͳServer Pushϛυϧ ΢ΣΞ ‣ ΫϥΠΞϯτ͸Plasmaʹରͯ͠subscribe͍ͨ͠EventΛૹΔ ‣ Πϕϯτൃੜ࣌ʹPlasma͕ΫϥΠΞϯτʹରͯ͠৘ใΛૹΔ ‣ https://blog.stormcat.io/post/entry/openfresh-plasma/ Plasma

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gRPC Client Plasma

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gRPC Client Plasma Connect to server

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gRPC Client Plasma Connect to server subscribe Event1

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gRPC Client Plasma Connect to server subscribe Event1 Event1

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gRPC Client Plasma Connect to server subscribe Event1 Event1

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2 Event2

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2 Event2

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2 Event1 Event2

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2 Event1 Event2

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gRPC Client Plasma Connect to server subscribe Event1 Event1 subscribe Event2 Event1 Event2 ແବͳϦΫΤετͷ࡟ݮ ϦΞϧλΠϜ

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TIPS

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‣ Protobuf ‣ ProtoϑΝΠϧͷσʔλఆٛΛݩʹSerialize/Deserializeίʔυͷੜ ੒ɺσʔλΫϥεͷੜ੒ ‣ ProtoϑΝΠϧͷαʔϏεఆٛΛݩʹStubΫϥεͷੜ੒ ‣ Channel ‣ αʔόʔͱͷίωΫγϣϯ ‣ Stub ‣ αʔϏε gRPC

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Kotlin and Protobuf

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Kotlin and Protobuf

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apply plugin: 'com.android.application' apply plugin: 'kotlin-android' apply plugin: 'com.google.protobuf' apply plugin: 'com.android.application' apply plugin: 'com.google.protobuf' apply plugin: 'kotlin-android' Kotlin and Protobuf

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Channel and Lifecycle

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ManagedChannel and Lifecycle onCreate

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ManagedChannel and Lifecycle onCreate new ManagedChannel()

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ManagedChannel and Lifecycle onCreate new ManagedChannel() FooServiceStubGrpc.newStub(channel)

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ManagedChannel and Lifecycle onCreate new ManagedChannel() FooServiceStubGrpc.newStub(channel) stub.bar()

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ManagedChannel and Lifecycle onCreate onDestroy channel.shutdownNow() new ManagedChannel() FooServiceStubGrpc.newStub(channel) stub.bar()

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ManagedChannel and Lifecycle onCreate onDestroy channel.shutdownNow() the system will simply kill the activity's hosting process without calling onDestroy new ManagedChannel() FooServiceStubGrpc.newStub(channel) stub.bar()

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ManagedChannel and Lifecycle onCreate onDestroy channel.shutdownNow() new ManagedChannel() FooServiceStubGrpc.newStub(channel) stub.bar() αʔόʔʹແବͳίωΫγϣϯ͕ཷ·͍ͬͯ͘ ΞϓϦ͕όοΫάϥ΢ϯυͰ΋௨৴ͯ͠͠·͏

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ManagedChannel and Lifecycle onCreate onDestroy channel.shutdownNow() new ManagedChannel() FooServiceStubGrpc.newStub(channel) stub.bar() onStart onStop

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‣ onStart-onStopͰίωΫγϣϯΛுΔ ‣ ίωΫγϣϯ͕੾ΕͨStub͸࢖͑ͳ͘ͳΔͷͰɺStub΋ຖ౓ੜ੒͠௚ ͢ ‣ FRESH!Ͱ͸gRPCͰ௨৴͢Δ༻ͷΫϥεΛ࡞੒ɻαʔόʔͱͷ઀ଓ ͱɺϦΫΤετΛ·ͱΊͨɻ ManagedChannel and Lifecycle

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Reconnection

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‣ Channel: αʔόʔͱͷίωΫγϣϯ ‣ ManagedChannel:αʔόʔ͕μ΢ϯ͢Δɺ୺຤͕ΦϑϥΠϯʹͳΔͳ ͲʹΑͬͯίωΫγϣϯ͕੾Εͯ΋ɺ࠶઀ଓΛߦͬͯ͘ΕΔɻ Reconnection

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Reconnection ͍͔ͭΒManagedChannel͕ૉૣ͘ ࠶઀ଓͯ͘͠ΕΔͱࡨ͍֮ͯͨ͠?

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‣ ͔ͨ͠ʹɺ࠶઀ଓͯ͘͠ΕΔɻ ‣ ͔͠͠ɺ΍ͨΒ͕͔͔࣌ؒΔɻ(5ඵͱ͔10ඵͱ͔) ‣ ࠶઀ଓ·ͰผͷHTTP/1.1ͷAPIΛୟ͘ Plasma͕RxͰ͍͏PublishSubjectͷΑ͏ͳϛυϧ΢ΣΞͳͷͰɺ઀ଓ͕੾Ε͍ͯΔؒʹى͖ͨΠϕϯτΛ औΕͳ͍ͨΊ Reconnection

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‣ ͔ͨ͠ʹɺ࠶઀ଓͯ͘͠ΕΔɻ ‣ ͔͠͠ɺ΍ͨΒ͕͔͔࣌ؒΔɻ(5ඵͱ͔10ඵͱ͔) ‣ ࠶઀ଓ·ͰผͷHTTP/1.1ͷAPIΛୟ͘ Plasma͕RxͰ͍͏PublishSubjectͷΑ͏ͳϛυϧ΢ΣΞͳͷͰɺ઀ଓ͕੾Ε͍ͯΔؒʹى͖ͨΠϕϯτΛ औΕͳ͍ͨΊ ‣ ઀ଓঢ়ଶͷมߋΛ؂ࢹ͍ͨ͠ͳ͊…. Reconnection

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‣ ͔ͨ͠ʹɺ࠶઀ଓͯ͘͠ΕΔɻ ‣ ͔͠͠ɺ΍ͨΒ͕͔͔࣌ؒΔɻ(5ඵͱ͔10ඵͱ͔) ‣ ࠶઀ଓ·ͰผͷHTTP/1.1ͷAPIΛୟ͘ Plasma͕RxͰ͍͏PublishSubjectͷΑ͏ͳϛυϧ΢ΣΞͳͷͰɺ઀ଓ͕੾Ε͍ͯΔؒʹى͖ͨΠϕϯτΛ औΕͳ͍ͨΊ ‣ ઀ଓঢ়ଶͷมߋΛ؂ࢹ͍ͨ͠ͳ͊…. Reconnection

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TLS 1.2

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OkHttpChannelBuilder .forAddress(address, port) .sslSocketFactory(sslSocketFactory) .connectionSpec( ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS) .tlsVersions(TlsVersion.TLS_1_2) .build() ) .negotiationType(NegotiationType.TLS) .build() Build ManagedChannel

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OkHttpChannelBuilder .forAddress(address, port) .sslSocketFactory(sslSocketFactory) .connectionSpec( ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS) .tlsVersions(TlsVersion.TLS_1_2) .build() ) .negotiationType(NegotiationType.TLS) .build() Build ManagedChannel

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OkHttpChannelBuilder .forAddress(address, port) .sslSocketFactory(sslSocketFactory) .connectionSpec( ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS) .tlsVersions(TlsVersion.TLS_1_2) .build() ) .negotiationType(NegotiationType.TLS) .build() Build ManagedChannel Android 4.1-4.4Ͱ TLS 1.2͕ར༻Ͱ͖ͳ͍

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class TlsSocketFactory(private val delegate: SSLSocketFactory) : SSLSocketFactory() { override fun getDefaultCipherSuites(): Array = delegate.defaultCipherSuites override fun createSocket(s: Socket?, host: String?, port: Int, autoClose: Boolean): Socket = delegate.createSocket(s, host, port, autoClose).let(this::patch) override fun createSocket(host: String?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(host: String?, port: Int, localHost: InetAddress?, localPort: Int): Socket = delegate.createSocket(host, port, localHost, localPort).let(this::patch) override fun createSocket(host: InetAddress?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(address: InetAddress?, port: Int, localAddress: InetAddress?, localPort: Int): Socket = delegate.createSocket(address, port, localAddress, localPort).let(this::patch) override fun getSupportedCipherSuites(): Array = delegate.supportedCipherSuites private fun patch(s: Socket): Socket = s.apply { if (this is SSLSocket) enabledProtocols = arrayOf("TLSv1.2") } } Enable TLS 1.2 https://github.com/square/okhttp/issues/2372

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class TlsSocketFactory(private val delegate: SSLSocketFactory) : SSLSocketFactory() { override fun getDefaultCipherSuites(): Array = delegate.defaultCipherSuites override fun createSocket(s: Socket?, host: String?, port: Int, autoClose: Boolean): Socket = delegate.createSocket(s, host, port, autoClose).let(this::patch) override fun createSocket(host: String?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(host: String?, port: Int, localHost: InetAddress?, localPort: Int): Socket = delegate.createSocket(host, port, localHost, localPort).let(this::patch) override fun createSocket(host: InetAddress?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(address: InetAddress?, port: Int, localAddress: InetAddress?, localPort: Int): Socket = delegate.createSocket(address, port, localAddress, localPort).let(this::patch) override fun getSupportedCipherSuites(): Array = delegate.supportedCipherSuites private fun patch(s: Socket): Socket = s.apply { if (this is SSLSocket) enabledProtocols = arrayOf("TLSv1.2") } } Enable TLS 1.2 https://github.com/square/okhttp/issues/2372

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class TlsSocketFactory(private val delegate: SSLSocketFactory) : SSLSocketFactory() { override fun getDefaultCipherSuites(): Array = delegate.defaultCipherSuites override fun createSocket(s: Socket?, host: String?, port: Int, autoClose: Boolean): Socket = delegate.createSocket(s, host, port, autoClose).let(this::patch) override fun createSocket(host: String?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(host: String?, port: Int, localHost: InetAddress?, localPort: Int): Socket = delegate.createSocket(host, port, localHost, localPort).let(this::patch) override fun createSocket(host: InetAddress?, port: Int): Socket = delegate.createSocket(host, port).let(this::patch) override fun createSocket(address: InetAddress?, port: Int, localAddress: InetAddress?, localPort: Int): Socket = delegate.createSocket(address, port, localAddress, localPort).let(this::patch) override fun getSupportedCipherSuites(): Array = delegate.supportedCipherSuites private fun patch(s: Socket): Socket = s.apply { if (this is SSLSocket) enabledProtocols = arrayOf("TLSv1.2") } } Enable TLS 1.2 SSLSocketFactoryΛϥοϓͯ͠TLS 1.2Λ༗ޮʹ͢Δ https://github.com/square/okhttp/issues/2372

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FRESH!

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FRESH!

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‣ ଈ࠲ʹαʔόʔ͔Β৘ใ͕ඈΜͰ͖ͯ࠷ߴ ‣ ίωΫγϣϯʹؾΛ഑Δඞཁ͕͋Δ ‣ HTTP/1.1ʹ͸ແ͔ͬͨ֓೦ͳͷͰ׳ΕΔ·Ͱେม ‣ AndroidͰϓϩμΫγϣϯʹಋೖͨ͠࿩͕গͳ͍ ‣ ࢼߦࡨޡͷ࿈ଓ Conclusion

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Thank you