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iOSΤϯδχΞͷҝͷgrpc-swiftೖ
iOSDC Japan 2018
Koichi Tanaka
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Koichi Tanaka
Origami inc.
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Agenda
• gRPCͱ
• gRPCͷϝϦοτ
• gRPC-Swiftʹ͍ͭͯ
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gRPCͱʁ
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Google͕։ൃͨ͠RPCϑϨʔϜϫʔΫ
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ͦͦRPCͱʁ
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Remote Procedure Call
αʔόʔͷؔΛϩʔΧϧͷؔͷΑ͏ʹݺͼग़ٕ͢ज़
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REST
HTTPϝιουͱURIΛࢦఆͯ͠αʔόʔͷػೳΛݺͼग़͢
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gRPC࠾༻ࣄྫ
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gRPC࠾༻ࣄྫ
• Firebase Firestore
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gRPC࠾༻ࣄྫ
• Firebase Firestore
• Google Cloud Speech
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gRPC࠾༻ࣄྫ
• Firebase Firestore
• Google Cloud Speech
• Lyft, Netflix, Square..etc
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gRPC࠾༻ࣄྫ
• Firebase Firestore
• Google Cloud Speech
• Lyft, Netflix, Square..etc
• Cyber Agent, Mercari, 10x, Origami..etc
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gRPCͷϝϦοτ
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APIͷ༷ͱ࣮ͷဃ͕ݮΓ·͢
ྫ͑࣍ͷΑ͏ͳΛආ͚ΒΕ·͢ɻ
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APIͷ༷ͱ࣮ͷဃ͕ݮΓ·͢
ྫ͑࣍ͷΑ͏ͳΛආ͚ΒΕ·͢ɻ
• ʮͦͷAPIυΩϡϝϯτʹ͋Δ͚Ͳ͏ଘࡏ͠ͳ͍ΜͩΑͶ
!
ʯ
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APIͷ༷ͱ࣮ͷဃ͕ݮΓ·͢
ྫ͑࣍ͷΑ͏ͳΛආ͚ΒΕ·͢ɻ
• ʮͦͷAPIυΩϡϝϯτʹ͋Δ͚Ͳ͏ଘࡏ͠ͳ͍ΜͩΑͶ
!
ʯ
• ʮͪΌΜͱnameͰϨεϙϯεฦͯ͠Δʁ͝ΊΜnemeͰλΠϙ
ͯͨ͠
"
ʯ
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APIͷ༷ͱ࣮ͷဃ͕ݮΓ·͢
ྫ͑࣍ͷΑ͏ͳΛආ͚ΒΕ·͢ɻ
• ʮͦͷAPIυΩϡϝϯτʹ͋Δ͚Ͳ͏ଘࡏ͠ͳ͍ΜͩΑͶ
!
ʯ
• ʮͪΌΜͱnameͰϨεϙϯεฦͯ͠Δʁ͝ΊΜnemeͰλΠϙ
ͯͨ͠
"
ʯ
• ʮϨεϙϯεͲΜͳߏ͚ͩͬͨͬʁ ʯ
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ڧ͍ܕ͚ɺHTTP/2ɺProtobuf
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ڧ͍ܕ͚ɺHTTP/2ɺProtobuf
• ։ൃ࣌ͷܕͷϛεશͯίϯύΠϧ࣌ʹݕग़Ͱ͖Δ
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ڧ͍ܕ͚ɺHTTP/2ɺProtobuf
• ։ൃ࣌ͷܕͷϛεશͯίϯύΠϧ࣌ʹݕग़Ͱ͖Δ
• ϙʔϦϯάΛαʔόʔαΠυϓογϡʹஔ͖͑ͯ௨৴ྔݮ
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ڧ͍ܕ͚ɺHTTP/2ɺProtobuf
• ։ൃ࣌ͷܕͷϛεશͯίϯύΠϧ࣌ʹݕग़Ͱ͖Δ
• ϙʔϦϯάΛαʔόʔαΠυϓογϡʹஔ͖͑ͯ௨৴ྔݮ
• Protocol BufferͰJSONΑΓϖΠϩʔυαΠζΛݮ
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Protocol Buffers
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Protocol Buffers
• Google͕։ൃͨ͠IDLʢΠϯλʔϑΣʔεهड़ݴޠʣ
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Protocol Buffers
• Google͕։ൃͨ͠IDLʢΠϯλʔϑΣʔεهड़ݴޠʣ
• JSONಉ༷௨৴ӬଓԽʹ͑ΔγϦΞϥΠζϑΥʔϚοτ
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Protocol Buffers
• Google͕։ൃͨ͠IDLʢΠϯλʔϑΣʔεهड़ݴޠʣ
• JSONಉ༷௨৴ӬଓԽʹ͑ΔγϦΞϥΠζϑΥʔϚοτ
• protoϑΝΠϧʹAPIΛܕ͖Ͱఆٛ
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Protocol Buffersʢলུʣ
service Greeter { // αʔϏεఆٛ
rpc SayHello (HelloRequest) returns (HelloResponse) {}ɹ // RPCϝιουఆٛ
}
message HelloRequest {ɹ// ϦΫΤετϝοηʔδఆٛ
string text = 1; // ϑΟʔϧυܕ ϑΟʔϧυ໊ ϑΟʔϧυ൪߸
}
message HelloResponse { // Ϩεϙϯεϝοηʔδఆٛ
string text = 1;
}
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Protocol Buffers
class Greeter_GreeterServiceClient {
func sayHello(){}
}
struct Greeter_HelloRequest {ɹ
var text: String = String()
}
struct Greeter_HelloResponse {
var text: String = String()
}
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4छྨͷετϦʔϛϯά௨৴
RPC ϦΫΤετ Ϩεϙϯε ར༻ྫ
Unary 1 1 ୯७ͳAPIɺϚΠΫ
ϩαʔϏεؒ௨৴
Server streaming 1 ෳ ϑΟʔυ৴ɺαʔ
όʔPush
Client streaming ෳ 1 ෳσʔλૹ৴
Bidirectional
streaming
ෳ ෳ speech-to-textɺνϟ
οτ
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͜͜·Ͱͷ·ͱΊ
• RPCRESTͱಉྻͷ௨৴खஈͷ̍ͭ
• gRPCͷߏཁૉɺઃܭɺProtocol BuffersɺHTTP/2ɺ11ݴޠʹ
ެࣜରԠ
• Protocol BuffersͰAPIͷܕΛදݱ
• HTTP/2্Ͱ4छྨͷετϦʔϛϯά௨৴Λ࣮ݱ
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gRPC-Swiftʹ͍ͭͯ
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gRPC-Swiftʹ͍ͭͯ
• gRPC-Swiftͷߏ
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gRPC-Swiftʹ͍ͭͯ
• gRPC-Swiftͷߏ
• ඞཁͳಓ۩ͷ४උ
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gRPC-Swiftʹ͍ͭͯ
• gRPC-Swiftͷߏ
• ඞཁͳಓ۩ͷ४උ
• γϯϓϧͳAPIͷ࣮
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gRPC-Swiftͷߏ
• gRPC-C-Core͕ϕʔε
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gRPC-Swiftͷߏ
• ExperimentalͰݱࡏͷόʔδϣϯ0.5.1
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gRPC-Swift with SwiftNIO?
• VaporͰΘΕ͍ͯΔSwiftNIOͰͷ࣮ݧతͳ࣮
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gRPC-SwiftΛ͏ͨΊʹඞཁͳಓ۩
ಓ۩ આ໌
protoc ϓϩτίϧίϯύΠϥɺ͜ΕͰίʔυ
Λࣗಈੜ͢Δ
protoc-gen-swift Swift༻ͷprotocϓϥάΠϯ
protoc-gen-swiftgrpc Swift+gRPC༻ͷprotocϓϥάΠϯ
SwiftGRPC = grpc-swiftɺswift-protobufʹґଘ)
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CocoaPodsʹΑΔಋೖํ๏
• grpc-swiftΛ͏४උΛ͑Δ: Qiita
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gRPCʹΑΔ։ൃͷྲྀΕ
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gRPCʹΑΔ։ൃͷྲྀΕ
• protoϑΝΠϧʹAPIΛఆٛ͢Δ
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gRPCʹΑΔ։ൃͷྲྀΕ
• protoϑΝΠϧʹAPIΛఆٛ͢Δ
• protocͰίʔυΛࣗಈੜ͢Δ
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gRPCʹΑΔ։ൃͷྲྀΕ
• protoϑΝΠϧʹAPIΛఆٛ͢Δ
• protocͰίʔυΛࣗಈੜ͢Δ
• αʔόʔͱΫϥΠΞϯτΛ࣮͢Δ
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γϯϓϧͳAPIͷ࣮
• ΫϥΠΞϯτ͔ΒϝοηʔδΛૹΔͱɺϝοηʔδͷඌʹจ
ࣈྻΛՃ͑ͯฦͯ͘͠ΕΔAPIΛߟ͑ͯΈΔ
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γϯϓϧͳAPIͷ࣮ʢprotoͷఆٛʣ
syntax = "proto3";
package greeter;
service Greeter {
rpc SayHello (HelloRequest) returns (HelloResponse) {}
}
message HelloRequest {
string text = 1;
}
message HelloResponse {
string text = 1;
}
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protocͰίʔυΛࣗಈੜ
$ protoc helloworld.proto \
--swift_out=. \
--swiftgrpc_out=Client=true,Server=false,TestStubs=true:.
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ࣗಈੜίʔυʢൈਮʣhelloworld.pb.swift
struct Greeter_HelloRequest {
var text: String = String()
}
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ࣗಈੜίʔυʢൈਮʣhelloworld.grpc.swift
internal final class Greeter_GreeterServiceClient: ServiceClientBase, Greeter_GreeterService {
/// Synchronous. Unary.
internal func sayHello(_ request: Greeter_HelloRequest) throws -> Greeter_HelloResponse {
return try Greeter_GreeterSayHelloCallBase(channel)
.run(request: request, metadata: metadata)
}
/// Asynchronous. Unary.
internal func sayHello(_ request: Greeter_HelloRequest,
completion: @escaping (Greeter_HelloResponse?, CallResult) -> Void)
throws -> Greeter_GreeterSayHelloCall {
return try Greeter_GreeterSayHelloCallBase(channel)
.start(request: request, metadata: metadata, completion: completion)
}
}
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gRPCΫϥΠΞϯτʢUnary Blocking)
let client = Greeter_GreeterServiceClient.init(address: "127.0.0.1:50051",
secure: false)
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
blockingSayHello()
}
func blockingSayHello() {
var request = Greeter_HelloRequest()
request.text = "hello"
let response = try? self.client.sayHello(request)
print("gRPC Server returns " + response!.text)
}
}
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gRPCΫϥΠΞϯτʢUnary Non Blocking)
// ඇಉظॲཧ
func nonBlockingSayHello() {
var request = Greeter_HelloRequest()
request.text = "hello"
let _ = try? self.client.sayHello(request, completion: { (response, result) in
if result.success, result.statusCode == .ok {
print("gRPC Server returns " + response!.text)
} else {
print("gRPC Server returns error")
}
})
}
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ଞͷετϦʔϛϯά௨৴Λѻ͏ʹ
service Echo {
//Unary
rpc Get(EchoRequest) returns (EchoResponse) {}
//Server streaming
rpc Expand(EchoRequest) returns (stream EchoResponse) {}
//Client streaming
rpc Collect(stream EchoRequest) returns (EchoResponse) {}
//Bidirectional streaming
rpc Update(stream EchoRequest) returns (stream EchoResponse) {}
}
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σϞ
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·ͱΊ
gRPCͱProtocol BuffersΛΈ߹ΘͤΔͱ
• API༷ʹؔ͢Δίϛϡχέʔγϣϯίετ͕Լ͕Δ
• ༷มߋʹίʔυࣗಈੜͰૉૣ͘ରԠՄೳ
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gRPCΛϞόΠϧΞϓϦ͔Β͏্Ͱͷ՝
• ϞόΠϧΞϓϦ͔Βར༻͍ͯ͠Δࣄྫ͕·ͩগͳ͍
• αʔόʔͷෛՙࢄͷ
!
• TLSଓΛߦ͏্Ͱͻͱखؒඞཁ
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Next Step!!
• grpc-swiftΛͬͯiOSΞϓϦͰշదͳgRPC௨৴Λߦ͏
• Plasma - gRPC streamΛར༻ͨ͠ϦΞϧλΠϜͳϢʔβʔମݧ
• grpc.io: Official Site
• grpc-swift: Github
• swift-protobuf: Github
• gRPC & iOS at Lyft: YouTube
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Thanks!! Questions?
Koichi Tanaka
@tikidunpon