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f63c130c28
Finished documenting flatbuffersbuilder Replaces swift 5.5 with 5.2 packages Starts building the tutorial for xcode 13 Finishes building the tutorial for xcode 13 Removes docc files from old swift versions Updates swift style guide
108 lines
3.3 KiB
Swift
108 lines
3.3 KiB
Swift
/*
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* Copyright 2021 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import FlatBuffers
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import GRPC
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import Logging
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import Model
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import NIO
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// Quieten the logs.
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LoggingSystem.bootstrap {
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var handler = StreamLogHandler.standardOutput(label: $0)
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handler.logLevel = .critical
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return handler
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}
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func greet(name: String, client greeter: models_GreeterServiceClient) {
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// Form the request with the name, if one was provided.
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var builder = FlatBufferBuilder()
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let nameOff = builder.create(string: name)
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let root = models_HelloRequest.createHelloRequest(
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&builder,
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nameOffset: nameOff)
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builder.finish(offset: root)
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// Make the RPC call to the server.
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let sayHello = greeter
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.SayHello(Message<models_HelloRequest>(builder: &builder))
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// wait() on the response to stop the program from exiting before the response is received.
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do {
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let response = try sayHello.response.wait()
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print("Greeter SayHello received: \(response.object.message ?? "Unknown")")
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} catch {
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print("Greeter failed: \(error)")
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}
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let surname = builder.create(string: name)
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let manyRoot = models_HelloRequest.createHelloRequest(
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&builder,
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nameOffset: surname)
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builder.finish(offset: manyRoot)
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let call = greeter.SayManyHellos(Message(builder: &builder)) { message in
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print(
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"Greeter SayManyHellos received: \(message.object.message ?? "Unknown")")
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}
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let status = try! call.status.recover { _ in .processingError }.wait()
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if status.code != .ok {
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print("RPC failed: \(status)")
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}
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}
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func main(args: [String]) {
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// arg0 (dropped) is the program name. We expect arg1 to be the port, and arg2 (optional) to be
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// the name sent in the request.
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let arg1 = args.dropFirst(1).first
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let arg2 = args.dropFirst(2).first
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switch (arg1.flatMap(Int.init), arg2) {
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case (.none, _):
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print("Usage: PORT [NAME]")
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exit(1)
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case let (.some(port), name):
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// Setup an `EventLoopGroup` for the connection to run on.
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//
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// See: https://github.com/apple/swift-nio#eventloops-and-eventloopgroups
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let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
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// Make sure the group is shutdown when we're done with it.
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defer {
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try! group.syncShutdownGracefully()
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}
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// Configure the channel, we're not using TLS so the connection is `insecure`.
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let channel = ClientConnection.insecure(group: group)
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.connect(host: "localhost", port: port)
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// Close the connection when we're done with it.
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defer {
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try! channel.close().wait()
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}
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// Provide the connection to the generated client.
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let greeter = models_GreeterServiceClient(channel: channel)
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// Do the greeting.
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greet(name: name ?? "FlatBuffers!", client: greeter)
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}
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}
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main(args: CommandLine.arguments)
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