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grpc-swiftΛͬͯ
iOSΞϓϦͰշదͳ
gRPC௨৴Λߦ͏ɹɹ
2018/08/31 iOSDC
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About Me
ҏ౻ɹګฏ
Github : KyoheiG3
Twitter : @KyoheiG3
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About Me
ΩϡϨʔγϣϯ
Ameba OWND
AbemaTV
SUPERCHOICE
ࠓ·ͨ৽ن
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gPRC
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gRPCͬͯԿʁ
• Google͕࡞ͬͨRPCΛ࣮ݱ͢ΔͨΊͷϑϨʔϜϫʔΫ
• ͚ࣾͷStubbyΛɺ2015ʹΦʔϓϯԽͨ͠ͷ
• HTTP2
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RPCͬͯԿʁ
• ϦϞʔτϓϩγʔδϟίʔϧͷུ
• ϓϩάϥϜ͔ΒผͷΞυϨεۭؒʹ͋Δαϒϧʔνϯखଓ
͖Λ࣮ߦ͢Δ͜ͱΛՄೳʹ͢Δٕज़
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HTTP2
• SPDYΛج൫ʹ࡞Γग़͞Εͨ
• SPDYGoogle
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Մೳͳ௨৴ํࣜ
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Unaryʢ୯ൃͷ௨৴ʣ
• 1ͭͷϦΫΤετʹର͠ɺϨεϙϯεΛ1ͭฦ͢
• HTTP1ܥͱಉ͡Α͏ͳεςʔτϨεͳ௨৴ํࣜ
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Server StreamingʢαʔόετϦʔϛϯάʣ
• 1ͭͷϦΫΤετʹର͠ɺϨεϙϯεΛෳฦ͢
• αʔόpush ϙʔϦϯάʹஔ͖ΘΔ
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Client StreamingʢΫϥΠΞϯτετϦʔϛϯάʣ
• ෳͷϦΫΤετʹର͠ɺϨεϙϯεΛ1ͭฦ͢
• ϑΝΠϧΞοϓϩʔυͳͲ
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Bi-Directional StreamingʢํετϦʔϛϯάʣ
• ෳͷϦΫΤετʹର͠ɺϨεϙϯεΛෳฦ͢
• νϟοτͳͲ
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Αࣖ͘ʹ͢ΔProtocol Buffersͱͷҧ͍ͬͯʁ
• Protocol Buffers௨৴͢Δσʔλͷܗࣜʢjson, xml...ʣ
• gRPC௨৴ͷखஈ
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͢͜͠Protocol Buffersͷ͓͞Β͍
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protobuf
• protobufͱུ͞ΕΔ͜ͱ͕ଟ͍
• όΠφϦϕʔε
• .protoϑΝΠϧͰσʔλܗࣜΛఆٛ
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echo.proto
syntax = "proto3";
package echo;
message EchoRequest {
string text = 1;
}
message EchoResponse {
string text = 1;
}
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protobuf
• .protoϑΝΠϧ͔ΒɺswiftgoϑΝΠϧΛ࡞Մೳ
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protobuf
$ protoc echo.proto --plugin=./protoc-gen-swift --swift_out=.
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echo.pb.swift
struct Echo_EchoRequest {
var text: String = String()
var unknownFields = SwiftProtobuf.UnknownStorage()
init() {}
}
struct Echo_EchoResponse {
var text: String = String()
var unknownFields = SwiftProtobuf.UnknownStorage()
init() {}
}
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protobuf
• swiftͰApple͕ެࣜʹαϙʔτ1
• όΠφϦͷγϦΞϥΠζɾσγϦΞϥΠζͷϥΠϒϥ
Ϧʹґଘ
• ܰͯ͘ܕ҆શ
1 https://github.com/apple/swift-protobuf
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protobuf σϝϦοτ
• ௨৴σʔλͷՄಡੑ͕͗͢Δʢͱ͍͏͔ಡΊͳ͍ʣ
• ಋೖʹҰखؒඞཁ
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protobuf ϝϦοτ
ׂѪ͠·͢ɻ
ϝϦοτͨ͘͞Μ͋ΔͷͰɺσʔλܗࣜͷબࢶͷҰͭʹೖ
ΕΔͷ͋Γͩͱࢥ͍·͢ɻ
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gRPC × protobuf
• gRPC͕ར༻͢ΔσϑΥϧτͷσʔλܗ͕ࣜprotobuf
• gRPC͋͘·Ͱ௨৴ͷखஈͳͷͰɺσʔλܗࣜҰԠjsonͱ
͔Մೳ
• ͚ͲɺprotobufͱgRPCζϒζϒͳͷͰҰॹʹ͏લఏ
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SwiftGRPC
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SwiftGRPC
• objective-cͰc++Ͱ࣮͞ΕͨgrpcΛར༻2
• swiftͰར༻͢Δʹগʑ໘
2 https://github.com/grpc/grpc
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SwiftGRPC
• grpcͷΠϯλʔϑΣʔεΛswiftͰϥοϓ
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Officially Supported Platforms3
C/C++, C#, Dart *, Go, Java, Node.js, PHP *, Python, Ruby
* ·ͩbeta
SwiftΞϯΦϑΟγϟϧͰ͔͢?!
3 https://grpc.io/about/#osp
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ಋೖ
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ಋೖ
• ͱʹ͔͘protobufલఏ
• SwiftGRPCͷprotocϓϥάΠϯΛ࡞
• .protoϑΝΠϧ͔Β.swiftϑΝΠϧΛ࡞
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protobufΛΠϯετʔϧ
$ brew install protobuf
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SwiftGRPCͷprotocϓϥάΠϯΛ࡞
• grpc-swiftΛcloneͯ͠build
$ git clone https://github.com/grpc/grpc-swift.git
$ cd grpc-swift
$ make all
> .protoc-gen-swift .protoc-gen-swiftgrpc
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ඞཁʹԠͯ͡pathΛ௨͢
• ࣮ߦ࣌ʹϓϥάΠϯͷpathΛࢦఆͰ͖ΔͷͰඞਢͰͳ͍
$ mkdir ~/.protoc
$ cp ./protoc-gen-swift ./protoc-gen-swiftgrpc ~/.protoc
$ echo 'export PATH=$PATH:$HOME/.protoc' >> ~/.bash_profile
$ source ~/.bash_profile
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protoc-gen-swiftgrpc
• SwiftGRPCͷprotocϓϥάΠϯ
• protobufͱಉ༷ʹ.proto͔Β.swiftΛ࡞
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echo.protoʢbeforeʣ
syntax = "proto3";
package echo;
message EchoRequest {
string text = 1;
}
message EchoResponse {
string text = 1;
}
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echo.protoʢserviceʣ
• serviceͷதʹɺrpcϑΟʔϧυΛఆٛ͢Δ
service Echo {
rpc
}
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echo.protoʢserviceʣ
• rpcϑΟʔϧυʹҙͷϝιουΛఆٛ͢Δ
service Echo {
rpc Get
}
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echo.protoʢserviceʣ
• ϦΫΤετͷΦϒδΣΫτΛఆٛ͢Δ
service Echo {
rpc Get(EchoRequest)
}
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echo.protoʢserviceʣ
• ϨεϙϯεͷΦϒδΣΫτΛఆٛ͢Δ
service Echo {
rpc Get(EchoRequest) returns(EchoResponse) {}
}
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echo.protoʢserviceʣ
• streamෳճͷॲཧΛՄೳʹ͢Δఆٛ
service Echo {
rpc Get(EchoRequest) returns (EchoResponse) {}
rpc Expand(EchoRequest) returns (stream EchoResponse) {}
rpc Collect(stream EchoRequest) returns (EchoResponse) {}
rpc Update(stream EchoRequest) returns (stream EchoResponse) {}
}
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echo.protoʢafterʣ
syntax = "proto3";
package echo;
message EchoRequest {
string text = 1;
}
message EchoResponse {
string text = 1;
}
service Echo {
rpc Get(EchoRequest) returns (EchoResponse) {}
rpc Expand(EchoRequest) returns (stream EchoResponse) {}
rpc Collect(stream EchoRequest) returns (EchoResponse) {}
rpc Update(stream EchoRequest) returns (stream EchoResponse) {}
}
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protoc-gen-swiftgrpc
$ protoc echo.proto --plugin=./protoc-gen-swiftgrpc --swiftgrpc_out=.
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echo.grpc.swift
protocol Echo_EchoProvider: ServiceProvider {
func get(request: Echo_EchoRequest, session: Echo_EchoGetSession) throws -> Echo_EchoResponse
func expand(request: Echo_EchoRequest, session: Echo_EchoExpandSession) throws -> ServerStatus?
func collect(session: Echo_EchoCollectSession) throws -> Echo_EchoResponse?
func update(session: Echo_EchoUpdateSession) throws -> ServerStatus?
}
protocol Echo_EchoService: ServiceClient {
func get(_ request: Echo_EchoRequest) throws -> Echo_EchoResponse
func get(_ request: Echo_EchoRequest, completion: @escaping (Echo_EchoResponse?, CallResult) -> Void) throws -> Echo_EchoGetCall
func expand(_ request: Echo_EchoRequest, completion: ((CallResult) -> Void)?) throws -> Echo_EchoExpandCall
func collect(completion: ((CallResult) -> Void)?) throws -> Echo_EchoCollectCall
func update(completion: ((CallResult) -> Void)?) throws -> Echo_EchoUpdateCall
}
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EchoʢαϯϓϧʣͰίʔυղઆ
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Echoͷಈ͔͠ํ
• SwiftGRPC.xcodeprojΛ࡞͢Δ
$ make project
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Echoͷಈ͔͠ํ
• ./third_party/swift-protobuf͕ඞཁ
• ࠷ۙऔಘεΫϦϓτ͕আ͞Εͨ4
$ mkdir third_party
$ cd third_party
$ git clone https://github.com/apple/swift-protobuf.git
4 https://github.com/grpc/grpc-swift/pull/296
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Echoͷಈ͔͠ํ
• ./Examples/EchoXcode/Echo.xcodeprojΛ։͘
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Echoͷಈ͔͠ํ
• ./SwiftGRPC.xcodeprojΛϓϩδΣΫτʹՃ͢Δ
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Echoͷಈ͔͠ํ
• Target DependenciesʹSwiftGRPC.frameworkΛՃ͢Δ
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Echo for Client
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Echo_EchoServiceClient
• ΫϥΠΞϯτ͔ΒαʔόͷଓΛཧ
• ෦ͰChannelΦϒδΣΫτΛอ࣋
• Echo_EchoServiceʹ४ڌ
• get, expand, collect, updateϝιουΛ࣮ߦͯ͠ɺετ
ϦʔϛϯάΛߦ͏ͨΊͷCallΦϒδΣΫτΛ࡞
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Echo_EchoServiceClient
let service = Echo_EchoServiceClient(address: "YOUR_ADDRESS",
secure: false)
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Echo_EchoExpandCallʢServerStreamingʣ
• expand()ϝιουͰऔಘ
• αʔόετϦʔϛϯά͕Մೳ
• receive()ϝιουΛ࣮ߦՄೳ
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Echo_EchoExpandCallʢServerStreamingʣ
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
let expandCall = try service.expand(requestMessage) { _ in
}
try expandCall.receive { response in
// ϨεϙϯεΛड͚औΔ
}
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Echo_EchoCollectCallʢClientStreamingʣ
• collect()ϝιουͰऔಘ
• ΫϥΠΞϯτετϦʔϛϯά͕Մೳ
• send(), closeAndReceive()ϝιουΛ࣮ߦՄೳ
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Echo_EchoCollectCallʢClientStreamingʣ
let collectCall = try service.collect { _ in
}
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
try collectCall.send(requestMessage) { error in
// ΤϥʔΛड͚औΔ
}
try collectCall.closeAndReceive { response in
// close࣌ʹ1͚ͩσʔλΛड͚औΕΔ
}
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Echo_EchoUpdateCallʢBidirectionalStreamingʣ
• update()ϝιουͰऔಘ
• ํετϦʔϛϯά͕Մೳ
• send(), receive(), closeSend()ϝιουΛ࣮ߦՄೳ
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Echo_EchoUpdateCallʢBidirectionalStreamingʣ
let updateCall = try service.update { _ in
}
try updateCall.receive { response in
// ϨεϙϯεΛड͚औΔ
}
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
try updateCall.send(requestMessage) { error in
// ΤϥʔΛड͚औΔ
}
try updateCall.closeSend {}
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ΫϥΠΞϯτ࣮ͷجຊతͳྲྀΕ
• Service͔ΒCallΦϒδΣΫτΛ࡞͢Δ
• ࡞ͨ͠CallΦϒδΣΫτʹ༻ҙ͞Ε͍ͯΔstreamingͷϝ
ιουΛݺͼग़͢
• CallΦϒδΣΫτstreaming͕ऴྃ͢Δ·Ͱอ͓࣋ͯ͘͠
※ Unaryྫ֎
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Echo_EchoGetCallʢUnaryʣ
• get()ϝιουͰऔಘ
• streaming༻ͷϝιου༻ҙ͞Ε͍ͯͳ͍
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Echo_EchoGetCallʢUnaryʣ
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
let getCall = try service.get(requestMessage) { response, callResult in
}
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ΫϥΠΞϯτ࣮ͷಛ
• CallΦϒδΣΫτΛ࡞͔ͬͨ࣌ΒtimeoutΧϯτμϯ
• σϑΥϧτ600ඵͰɺϦΫΤετݸผʹઃఆෆՄ
• ClientStreamingͷsend()ʹҾͰͤΔtimeoutɺಉظ
௨৴͢Δࡍͷsemaphoreͷػ࣌ؒ
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ΫϥΠΞϯτ࣮ͷಛ
• receive()ɺ1ͰσʔλΛड͚औΔͱͦΕҎ࣮߱ߦ͞
Εͳ͍ͷͰɺ࠶receive()ΛݺͿඞཁ͕͋Δ
• ͳʹ͔͠ΒͷΤϥʔ͕ग़ͨΒͦΕҎ߱ૹड৴Ͱ͖ͳ͍ͷͰɺ
CallΦϒδΣΫτ͔Β࠶࡞͢Δඞཁ͕͋Δ
• throws͕ͨΒଟ͍
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ΫϥΠΞϯτͷstubʹ͍ͭͯ
• ServerΛϩʔΧϧʹ࣮ͯ͠stubԽ
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Echo for Server
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ServiceServer
• αʔόͷΫϥΠΞϯτ͔ΒͷଓΛཧ
• ෦ͰServerΦϒδΣΫτΛอ࣋
• Echo_EchoProviderʹ४ڌͨ͠ΦϒδΣΫτΛड͚औΔ
• startϝιουͰɺଓͷड৴Λ։࢝
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ServiceServer
class EchoProvider: Echo_EchoProvider {
func get() {}
func expand() {}
func collect() {}
func update() {}
}
let provider = EchoProvider()
let server = ServiceServer(address: "YOUR_ADDRESS",
serviceProviders: [provider])
server.start()
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Echo_EchoProvider
• get, expand, collect, updateϝιουͰɺΫϥΠΞϯ
τͷϨεϙϯεΛߦ͏
• ҾͰ͞ΕΔSessionΦϒδΣΫτͰৼΔ͍Λ࣮
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Echo_EchoProviderʢget == Unaryʣ
• Echo_EchoRequestΦϒδΣΫτΛऔಘ
• Echo_EchoResponseΛฦͨ͠Βऴྃ
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Echo_EchoProviderʢget == Unaryʣ
func get(request: Echo_EchoRequest,
session _: Echo_EchoGetSession) throws -> Echo_EchoResponse {
var response = Echo_EchoResponse()
response.text = request.text + " response"
return response
}
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Echo_EchoProviderʢexpand == ServerStreamingʣ
• Echo_EchoRequestΦϒδΣΫτΛऔಘ
• ඞཁʹԠͯ͡sessionͷsend()Λ࣮ߦ
• ServerStatusΛฦ͠ɺ͔ͭsend()͕ྃͨ͠Βऴྃ
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Echo_EchoProviderʢexpand == ServerStreamingʣ
func expand(request: Echo_EchoRequest,
session: Echo_EchoExpandSession) throws -> ServerStatus? {
var response = Echo_EchoResponse()
response.text = request.text + " response"
try! session.send(response) {
// ΤϥʔΛड͚औΔ
}
return .ok
}
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Echo_EchoProviderʢcollect == ClientStreamingʣ
• ϦΫΤετsessionͷreceive()Ͱऔಘ
• Echo_EchoResponseΛฦͨ͠Βऴྃ
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Echo_EchoProviderʢcollect == ClientStreamingʣ
func collect(session: Echo_EchoCollectSession) throws -> Echo_EchoResponse? {
var response = Echo_EchoResponse()
let request = try! session.receive()
response.text = request.text + " response"
return response
}
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Echo_EchoProviderʢupdate == BidiStreamingʣ
• ϦΫΤετsessionͷreceive()Ͱऔಘ
• ඞཁʹԠͯ͡sessionͷsend()Λ࣮ߦ
• ServerStatusΛฦ͠ɺ͔ͭsend()͕ྃͨ͠Βऴྃ
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Echo_EchoProviderʢupdate == BidiStreamingʣ
func update(session: Echo_EchoUpdateSession) throws -> ServerStatus? {
let request = try! session.receive()
var response = Echo_EchoResponse()
response.text = request.text + " response"
try! session.send(response) {
// ΤϥʔΛड͚औΔ
}
return .ok
}
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αʔό࣮ͷجຊతͳྲྀΕ
• Echo_EchoProviderʹ४ڌͨ͠ΦϒδΣΫτΛ࡞͢Δ
• ProviderͷϝιουͰಉظతʹॲཧ͠ɺΛฦͯ͠ऴྃ
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SwiftGRPCClient
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No content
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SwiftGRPCClient
> https://github.com/cats-oss/grpc-swift-client
• ΫϥΠΞϯτઐ༻ͷgRPCϥΠϒϥϦ
• SwiftGRPCʹґଘ
• timeoutΛϦΫΤετ୯ҐͰܾΊͨΓ
• ϦΫΤετͷ్தͰॲཧΛΠϯλʔηϓτͨ͠Γ
• receive()ΛࣗಈͰϦτϥΠͯ͘͠ΕͨΓ
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protoc-gen-swiftgrpc-client
$ protoc echo.proto --plugin=./protoc-gen-swiftgrpc-client --swiftgrpc-client_out=.
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protoc-gen-swiftgrpc-client
enum Echo_EchoMethod: String, CallMethod {
case get = "Get"
static let service = "echo.Echo"
}
protocol _Echo_EchoGetRequest {
typealias InputType = Echo_EchoRequest
typealias OutputType = Echo_EchoResponse
}
protocol Echo_EchoGetRequest: _Echo_EchoGetRequest, UnaryStreamingRequest {}
extension Echo_EchoGetRequest {
var method: CallMethod {
return Echo_EchoMethod.get
}
}
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SwiftGRPCʢClientStreamingʣ
let collectCall = try service.collect { _ in
}
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
try collectCall.send(requestMessage) { error in
// ΤϥʔΛड͚औΔ
}
try collectCall.closeAndReceive { response in
// close࣌ʹ1͚ͩσʔλΛड͚औΕΔ
}
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SwiftGRPCClientʢClientStreamingʣ
let stream = Session.shared.stream(with: EchoClientRequest())
stream
.send("message") { response in
// ૹ৴݁ՌΛड͚औΔ
}
stream
.closeAndReceive { response in
// close࣌ʹ1͚ͩσʔλΛड͚औΕΔ
}
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SwiftGRPCʢServerStreamingʣ
var requestMessage = Echo_EchoRequest()
requestMessage.text = "message"
let expandCall = try service.expand(requestMessage) { _ in
}
try expandCall.receive { response in
// ϨεϙϯεΛड͚औΔ
}
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SwiftGRPCClientʢServerStreamingʣ
let stream = Session.shared.stream(with: EchoServerRequest(text: "message"))
.receive { response in
// ϨεϙϯεΛड͚औΔ
}
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SwiftGPRCClientʢRxʣ
extension Reactive where Base: Streaming, Base.Request: UnaryRequest {
func data() -> Observable {
return .create { observer in
self.base.data { result in
switch result {
case .success(let data):
observer.onNext(data)
observer.onCompleted()
case .failure(let error):
observer.onError(error)
}
}
return Disposables.create {
self.base.cancel()
}
}
}
}
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SwiftGPRCClientʢRxʣ
Session.shared.stream(with: EchoUnaryRequest()).rx.data()
.subscribe(onNext: { response in
// ϨεϙϯεΛड͚औΔ
}, onError: { error in
// ΤϥʔΛड͚औΔ
})
.disposed(by: disposeBag)
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SwiftGPRCClient
• ΫϥΠΞϯτʹSwiftGPRCClientΛར༻ͯ͠ɺstubͱͯ͠
SwiftGRPCͷαʔό࣮Λར༻͢Δ
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ॴײͱࠓޙ
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ॴײ
• ࠷ॳcallͷcancel͢Βແ͔ͬͨ
• ಋೖ͕ਏ͔ͬͨ
• Τϥʔ࣌ͷࡉ͔͍ڍಈ͕௫ΈͮΒ͍
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Swift Summit
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ࠓޙ
• ࠷ۙυΠπਓͷΤϯδχΞ͕ฃಆͯ͠ϝϯςφϯε
• Network.frameworkͷಋೖͷݕ౼ͳͲ͕͞Ε͍ͯΔ
• ͱΓ͋͑ͣਖ਼ࣜʹgrpcҰʹೖͬͯཉ͍͠
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grpc-swiftΛͬͯiOSΞϓϦͰշదͳgRPC௨৴Λߦ͏ɹɹ
https://github.com/cats-oss/grpc-swift-client
Github : KyoheiG3
Twitter : @KyoheiG3
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Thanks!