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NIOPeer.swift
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NIOPeer.swift
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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Cluster Membership open source project
//
// Copyright (c) 2020-2022 Apple Inc. and the Swift Cluster Membership project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.md for the list of Swift Cluster Membership project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import ClusterMembership
import Logging
import NIO
import NIOConcurrencyHelpers
import SWIM
public extension SWIM {
/// SWIMPeer designed to deliver messages over UDP in collaboration with the SWIMNIOHandler.
actor NIOPeer: SWIMPeer, SWIMPingOriginPeer, SWIMPingRequestOriginPeer, CustomStringConvertible {
public let swimNode: ClusterMembership.Node
internal nonisolated var node: ClusterMembership.Node {
self.swimNode
}
internal let channel: Channel
public init(node: Node, channel: Channel) {
self.swimNode = node
self.channel = channel
}
public func ping(
payload: GossipPayload<SWIM.NIOPeer>,
from origin: SWIM.NIOPeer,
timeout: Swift.Duration,
sequenceNumber: SWIM.SequenceNumber
) async throws -> PingResponse<SWIM.NIOPeer, SWIM.NIOPeer> {
try await withCheckedThrowingContinuation { continuation in
let message = SWIM.Message.ping(replyTo: origin, payload: payload, sequenceNumber: sequenceNumber)
let command = SWIMNIOWriteCommand(message: message, to: self.swimNode, replyTimeout: timeout.toNIO, replyCallback: { reply in
switch reply {
case .success(.response(.nack(_, _))):
continuation.resume(throwing: SWIMNIOIllegalMessageTypeError("Unexpected .nack reply to .ping message! Was: \(reply)"))
case .success(.response(let pingResponse)):
assert(sequenceNumber == pingResponse.sequenceNumber, "callback invoked with not matching sequence number! Submitted with \(sequenceNumber) but invoked with \(pingResponse.sequenceNumber)!")
continuation.resume(returning: pingResponse)
case .failure(let error):
continuation.resume(throwing: error)
case .success(let other):
continuation.resume(throwing:
SWIMNIOIllegalMessageTypeError("Unexpected message, got: [\(other)]:\(reflecting: type(of: other)) while expected \(PingResponse<SWIM.NIOPeer, SWIM.NIOPeer>.self)"))
}
})
self.channel.writeAndFlush(command, promise: nil)
}
}
public func pingRequest(
target: SWIM.NIOPeer,
payload: GossipPayload<SWIM.NIOPeer>,
from origin: SWIM.NIOPeer,
timeout: Duration,
sequenceNumber: SWIM.SequenceNumber
) async throws -> PingResponse<SWIM.NIOPeer, SWIM.NIOPeer> {
try await withCheckedThrowingContinuation { continuation in
let message = SWIM.Message.pingRequest(target: target, replyTo: origin, payload: payload, sequenceNumber: sequenceNumber)
let command = SWIMNIOWriteCommand(message: message, to: self.node, replyTimeout: timeout.toNIO, replyCallback: { reply in
switch reply {
case .success(.response(let pingResponse)):
assert(sequenceNumber == pingResponse.sequenceNumber, "callback invoked with not matching sequence number! Submitted with \(sequenceNumber) but invoked with \(pingResponse.sequenceNumber)!")
continuation.resume(returning: pingResponse)
case .failure(let error):
continuation.resume(throwing: error)
case .success(let other):
continuation.resume(throwing: SWIMNIOIllegalMessageTypeError("Unexpected message, got: \(other) while expected \(PingResponse<SWIM.NIOPeer, SWIM.NIOPeer>.self)"))
}
})
self.channel.writeAndFlush(command, promise: nil)
}
}
public func ack(
acknowledging sequenceNumber: SWIM.SequenceNumber,
target: SWIM.NIOPeer,
incarnation: Incarnation,
payload: GossipPayload<SWIM.NIOPeer>
) {
let message = SWIM.Message.response(.ack(target: target, incarnation: incarnation, payload: payload, sequenceNumber: sequenceNumber))
let command = SWIMNIOWriteCommand(message: message, to: self.node, replyTimeout: .seconds(0), replyCallback: nil)
self.channel.writeAndFlush(command, promise: nil)
}
public func nack(
acknowledging sequenceNumber: SWIM.SequenceNumber,
target: SWIM.NIOPeer
) {
let message = SWIM.Message.response(.nack(target: target, sequenceNumber: sequenceNumber))
let command = SWIMNIOWriteCommand(message: message, to: self.node, replyTimeout: .seconds(0), replyCallback: nil)
self.channel.writeAndFlush(command, promise: nil)
}
public nonisolated var description: String {
"NIOPeer(\(self.node))"
}
}
}
extension SWIM.NIOPeer: Hashable {
public nonisolated func hash(into hasher: inout Hasher) {
self.node.hash(into: &hasher)
}
public static func == (lhs: SWIM.NIOPeer, rhs: SWIM.NIOPeer) -> Bool {
lhs.node == rhs.node
}
}
public struct SWIMNIOTimeoutError: Error, CustomStringConvertible {
let timeout: Duration
let message: String
init(timeout: NIO.TimeAmount, message: String) {
self.timeout = .nanoseconds(Int(timeout.nanoseconds))
self.message = message
}
init(timeout: Duration, message: String) {
self.timeout = timeout
self.message = message
}
public var description: String {
"SWIMNIOTimeoutError(timeout: \(self.timeout.prettyDescription), \(self.message))"
}
}
public struct SWIMNIOIllegalMessageTypeError: Error, CustomStringConvertible {
let message: String
init(_ message: String) {
self.message = message
}
public var description: String {
"SWIMNIOIllegalMessageTypeError(\(self.message))"
}
}