grpc-swift/Plugin/templates/server-session-serverstreaming.swift

// {{ method.name }} (Server Streaming)
public class {{ .|session:protoFile,service,method }} {
  private var handler : gRPC.Handler
  private var provider : {{ .|provider:protoFile,service }}

  /// Create a session.
  fileprivate init(handler:gRPC.Handler, provider: {{ .|provider:protoFile,service }}) {
    self.handler = handler
    self.provider = provider
  }

  /// Send a message. Nonblocking.
  public func Send(_ response: {{ method|output }}) throws {
    try! handler.sendResponse(message:response.serializeProtobuf()) {}
  }

  /// Run the session. Internal.
  fileprivate func run(queue:DispatchQueue) throws {
    try self.handler.receiveMessage(initialMetadata:Metadata()) {(requestData) in
      if let requestData = requestData {
        let requestMessage = try! {{ method|input }}(protobuf:requestData)
        // to keep providers from blocking the server thread,
        // we dispatch them to another queue.
        queue.async {
          try! self.provider.expand(request:requestMessage, session: self)
          try! self.handler.sendStatus(statusCode:0,
                                       statusMessage:"OK",
                                       trailingMetadata:Metadata(),
                                       completion:{})
        }
      }
    }
  }
}