| | | 1 | | /* |
| | | 2 | | * Copyright 2018 Stanislav Muhametsin. All rights Reserved. |
| | | 3 | | * |
| | | 4 | | * Licensed under the Apache License, Version 2.0 (the "License"); |
| | | 5 | | * you may not use this file except in compliance with the License. |
| | | 6 | | * You may obtain a copy of the License at |
| | | 7 | | * |
| | | 8 | | * http://www.apache.org/licenses/LICENSE-2.0 |
| | | 9 | | * |
| | | 10 | | * Unless required by applicable law or agreed to in writing, software |
| | | 11 | | * distributed under the License is distributed on an "AS IS" BASIS, |
| | | 12 | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| | | 13 | | * implied. |
| | | 14 | | * |
| | | 15 | | * See the License for the specific language governing permissions and |
| | | 16 | | * limitations under the License. |
| | | 17 | | */ |
| | | 18 | | using Newtonsoft.Json; |
| | | 19 | | using Newtonsoft.Json.Linq; |
| | | 20 | | using System; |
| | | 21 | | using System.Collections.Concurrent; |
| | | 22 | | using System.Collections.Generic; |
| | | 23 | | using System.IO; |
| | | 24 | | using System.Linq; |
| | | 25 | | using System.Text; |
| | | 26 | | using System.Threading; |
| | | 27 | | using System.Threading.Tasks; |
| | | 28 | | using UtilPack; |
| | | 29 | | |
| | | 30 | | namespace CBAM.NATS.Implementation |
| | | 31 | | { |
| | | 32 | | using TStoredState = Queue<NATSMessageImpl>; |
| | | 33 | | |
| | | 34 | | |
| | | 35 | | internal static class ClientProtocolConsts |
| | | 36 | | { |
| | | 37 | | |
| | | 38 | | public const Byte CR = 0x0D; |
| | | 39 | | public const Byte LF = 0x0A; |
| | | 40 | | public const Byte SPACE = 0x20; |
| | | 41 | | public const Byte TAB = 0x09; |
| | | 42 | | public static readonly Byte[] CRLF = new Byte[] { CR, LF }; |
| | | 43 | | public static readonly Byte[] LF_ARRAY = new Byte[] { CRLF[1] }; |
| | | 44 | | public static readonly Byte[] PONG = new Byte[] { 0x50, 0x4F, 0x4E, 0x47, 0x0D, LF }; |
| | | 45 | | |
| | | 46 | | public static readonly Byte[] SUB_PREFIX = new Byte[] { 0x53, 0x55, 0x42, SPACE }; |
| | | 47 | | public static readonly Byte[] PUB_PREFIX = new Byte[] { 0x50, 0x55, 0x42, SPACE }; |
| | | 48 | | public static readonly Byte[] UNSUB_PREFIX = new Byte[] { 0x55, 0x4E, 0x53, 0x55, 0x42, SPACE }; |
| | | 49 | | public static readonly Byte[] CONNECT_PREFIX = new Byte[] { 0x43, 0x4F, 0x4E, 0x4E, 0x45, 0x43, 0x54, SPACE }; |
| | | 50 | | |
| | | 51 | | public const Int32 READ_COUNT = 0x10000; |
| | | 52 | | |
| | | 53 | | public const Int32 UPPERCASE_MASK_FULL = 0x5F5F5F5F; |
| | | 54 | | public const Int32 INFO_INT = 0x494E464F; |
| | | 55 | | |
| | | 56 | | |
| | | 57 | | public static class Info |
| | | 58 | | { |
| | | 59 | | public const String SERVER_ID = "server_id"; |
| | | 60 | | public const String VERSION = "version"; |
| | | 61 | | public const String VERSION_GO = "go"; |
| | | 62 | | public const String HOST = "host"; |
| | | 63 | | public const String PORT = "port"; |
| | | 64 | | public const String AUTH_REQUIRED = "auth_required"; |
| | | 65 | | public const String SSL_REQUIRED = "ssl_required"; |
| | | 66 | | public const String MAX_PAYLOAD = "max_payload"; |
| | | 67 | | public const String CONNECT_URLS = "connect_urls"; |
| | | 68 | | } |
| | | 69 | | |
| | | 70 | | public static class Connect |
| | | 71 | | { |
| | | 72 | | public const String VERBOSE = "verbose"; |
| | | 73 | | public const String PEDANTIC = "pedantic"; |
| | | 74 | | public const String SSL_REQUIRED = "ssl_required"; |
| | | 75 | | public const String AUTH_TOKEN = "auth_token"; |
| | | 76 | | public const String USER = "user"; |
| | | 77 | | public const String PASSWORD = "pass"; |
| | | 78 | | public const String NAME = "name"; |
| | | 79 | | public const String LANGAUGE = "lang"; |
| | | 80 | | public const String VERSION = "version"; |
| | | 81 | | public const String PROTOCOL = "protocol"; |
| | | 82 | | } |
| | | 83 | | |
| | | 84 | | } |
| | | 85 | | |
| | | 86 | | |
| | | 87 | | internal sealed class ServerInformation |
| | | 88 | | { |
| | | 89 | | [JsonProperty( ClientProtocolConsts.Info.SERVER_ID )] |
| | | 90 | | public String ServerID { get; set; } |
| | | 91 | | |
| | | 92 | | [JsonProperty( ClientProtocolConsts.Info.VERSION )] |
| | | 93 | | public String ServerVersion { get; set; } |
| | | 94 | | |
| | | 95 | | [JsonProperty( ClientProtocolConsts.Info.VERSION_GO )] |
| | | 96 | | public String GoVersion { get; set; } |
| | | 97 | | |
| | | 98 | | [JsonProperty( ClientProtocolConsts.Info.HOST )] |
| | | 99 | | public String Host { get; set; } |
| | | 100 | | |
| | | 101 | | [JsonProperty( ClientProtocolConsts.Info.PORT )] |
| | | 102 | | public Int32 Port { get; set; } |
| | | 103 | | |
| | | 104 | | [JsonProperty( ClientProtocolConsts.Info.AUTH_REQUIRED )] |
| | | 105 | | public Boolean AuthenticationRequired { get; set; } |
| | | 106 | | |
| | | 107 | | [JsonProperty( ClientProtocolConsts.Info.SSL_REQUIRED )] |
| | | 108 | | public Boolean SSLRequired { get; set; } |
| | | 109 | | |
| | | 110 | | [JsonProperty( ClientProtocolConsts.Info.MAX_PAYLOAD )] |
| | | 111 | | public Int32 MaxPayload { get; set; } |
| | | 112 | | |
| | | 113 | | [JsonProperty( ClientProtocolConsts.Info.CONNECT_URLS )] |
| | | 114 | | public String[] ConnectionURLs { get; set; } |
| | | 115 | | } |
| | | 116 | | |
| | | 117 | | internal sealed class ClientInformation |
| | | 118 | | { |
| | | 119 | | [JsonProperty( ClientProtocolConsts.Connect.VERBOSE )] |
| | | 120 | | public Boolean IsVerbose { get; set; } |
| | | 121 | | |
| | | 122 | | [JsonProperty( ClientProtocolConsts.Connect.PEDANTIC )] |
| | | 123 | | public Boolean IsPedantic { get; set; } |
| | | 124 | | |
| | | 125 | | [JsonProperty( ClientProtocolConsts.Connect.SSL_REQUIRED )] |
| | | 126 | | public Boolean SSLRequired { get; set; } |
| | | 127 | | |
| | | 128 | | [JsonProperty( ClientProtocolConsts.Connect.AUTH_TOKEN, NullValueHandling = NullValueHandling.Ignore )] |
| | | 129 | | public String AuthenticationToken { get; set; } |
| | | 130 | | |
| | | 131 | | [JsonProperty( ClientProtocolConsts.Connect.USER, NullValueHandling = NullValueHandling.Ignore )] |
| | | 132 | | public String Username { get; set; } |
| | | 133 | | |
| | | 134 | | [JsonProperty( ClientProtocolConsts.Connect.PASSWORD, NullValueHandling = NullValueHandling.Ignore )] |
| | | 135 | | public String Password { get; set; } |
| | | 136 | | |
| | | 137 | | [JsonProperty( ClientProtocolConsts.Connect.NAME, NullValueHandling = NullValueHandling.Ignore )] |
| | | 138 | | public String ClientName { get; set; } |
| | | 139 | | |
| | | 140 | | [JsonProperty( ClientProtocolConsts.Connect.LANGAUGE, NullValueHandling = NullValueHandling.Ignore )] |
| | | 141 | | public String ClientLanguage { get; set; } |
| | | 142 | | |
| | | 143 | | [JsonProperty( ClientProtocolConsts.Connect.VERSION, NullValueHandling = NullValueHandling.Ignore )] |
| | | 144 | | public String ClientVersion { get; set; } |
| | | 145 | | |
| | | 146 | | [JsonProperty( ClientProtocolConsts.Connect.PROTOCOL, DefaultValueHandling = DefaultValueHandling.Ignore )] |
| | | 147 | | public Int32 ProtocolVersion { get; set; } |
| | | 148 | | |
| | | 149 | | } |
| | | 150 | | |
| | | 151 | | |
| | | 152 | | internal sealed class ClientProtocol : NATSConnectionObservability |
| | | 153 | | { |
| | | 154 | | private sealed class SubscriptionState |
| | | 155 | | { |
| | 3 | 156 | | public SubscriptionState( |
| | 3 | 157 | | String subject, |
| | 3 | 158 | | Int64 subscriptionID, |
| | 3 | 159 | | Boolean isGlobal |
| | 3 | 160 | | ) |
| | | 161 | | { |
| | 3 | 162 | | this.SubscriptionID = subscriptionID; |
| | 3 | 163 | | this.IsGlobal = isGlobal; |
| | 3 | 164 | | this.MessageQueue = isGlobal ? null : new Queue<NATSMessageImpl>(); |
| | 3 | 165 | | this.CachedMessage = isGlobal || subject.IndexOf( "*" ) >= 0 ? null : new NATSMessageImpl( subject, subscrip |
| | 3 | 166 | | this.DataBuffer = isGlobal ? null : new ResizableArray<Byte>(); |
| | 3 | 167 | | this.ByteArrayPool = new LocklessInstancePoolForClassesNoHeapAllocations<InstanceHolder<ResizableArray<Byte> |
| | 3 | 168 | | this.RentedByteArrays = new List<InstanceHolder<ResizableArray<Byte>>>(); |
| | 3 | 169 | | } |
| | | 170 | | |
| | 0 | 171 | | public Int64 SubscriptionID { get; } |
| | | 172 | | |
| | 9 | 173 | | public Queue<NATSMessageImpl> MessageQueue { get; } |
| | | 174 | | |
| | 0 | 175 | | public NATSMessageImpl CachedMessage { get; } |
| | | 176 | | |
| | 0 | 177 | | public ResizableArray<Byte> DataBuffer { get; } |
| | | 178 | | |
| | 3 | 179 | | public Boolean IsGlobal { get; } |
| | | 180 | | |
| | 5 | 181 | | public LocklessInstancePoolForClassesNoHeapAllocations<InstanceHolder<ResizableArray<Byte>>> ByteArrayPool { ge |
| | | 182 | | |
| | 7 | 183 | | public List<InstanceHolder<ResizableArray<Byte>>> RentedByteArrays { get; } |
| | | 184 | | |
| | | 185 | | } |
| | | 186 | | |
| | | 187 | | public abstract class IOState |
| | | 188 | | { |
| | | 189 | | |
| | 8 | 190 | | public IOState() |
| | | 191 | | { |
| | 8 | 192 | | this.Lock = new AsyncLock(); |
| | 8 | 193 | | this.Buffer = new ResizableArray<Byte>( 0x100 ); |
| | 8 | 194 | | } |
| | | 195 | | |
| | 26 | 196 | | public ResizableArray<Byte> Buffer { get; } |
| | | 197 | | |
| | 11 | 198 | | public AsyncLock Lock { get; } |
| | | 199 | | } |
| | | 200 | | |
| | | 201 | | public sealed class WriteState : IOState |
| | | 202 | | { |
| | | 203 | | public WriteState( |
| | 4 | 204 | | ) : base() |
| | | 205 | | { |
| | 4 | 206 | | } |
| | | 207 | | } |
| | | 208 | | |
| | | 209 | | public sealed class ReadState : IOState |
| | | 210 | | { |
| | | 211 | | public ReadState( |
| | 4 | 212 | | ) : base() |
| | | 213 | | { |
| | 4 | 214 | | this.MessageSpaceIndices = new Int32[3]; |
| | 4 | 215 | | this.BufferAdvanceState = new BufferAdvanceState(); |
| | 4 | 216 | | } |
| | | 217 | | |
| | 14 | 218 | | public BufferAdvanceState BufferAdvanceState { get; } |
| | | 219 | | |
| | 3 | 220 | | public Int32[] MessageSpaceIndices { get; } |
| | | 221 | | } |
| | | 222 | | |
| | | 223 | | public sealed class ClientProtocolIOState |
| | | 224 | | { |
| | | 225 | | |
| | 4 | 226 | | public ClientProtocolIOState( |
| | 4 | 227 | | Stream stream, |
| | 4 | 228 | | BinaryStringPool stringPool, |
| | 4 | 229 | | IEncodingInfo encoding, |
| | 4 | 230 | | WriteState writeState, |
| | 4 | 231 | | ReadState readState |
| | 4 | 232 | | ) |
| | | 233 | | { |
| | 4 | 234 | | this.Stream = ArgumentValidator.ValidateNotNull( nameof( stream ), stream ); |
| | 4 | 235 | | this.StringPool = ArgumentValidator.ValidateNotNull( nameof( stringPool ), stringPool ); |
| | 4 | 236 | | this.Encoding = ArgumentValidator.ValidateNotNull( nameof( encoding ), encoding ); |
| | 4 | 237 | | this.WriteState = writeState ?? new WriteState(); |
| | 4 | 238 | | this.ReadState = readState ?? new ReadState(); |
| | 4 | 239 | | } |
| | | 240 | | |
| | 11 | 241 | | public WriteState WriteState { get; } |
| | | 242 | | |
| | 6 | 243 | | public ReadState ReadState { get; } |
| | | 244 | | |
| | 24 | 245 | | public Stream Stream { get; } |
| | | 246 | | |
| | 3 | 247 | | public BinaryStringPool StringPool { get; } |
| | | 248 | | |
| | 16 | 249 | | public IEncodingInfo Encoding { get; } |
| | | 250 | | } |
| | | 251 | | |
| | | 252 | | public sealed class GlobalSubscriptionEventArgs |
| | | 253 | | { |
| | 1 | 254 | | public GlobalSubscriptionEventArgs( NATSMessageImpl message ) |
| | | 255 | | { |
| | 1 | 256 | | this.Message = ArgumentValidator.ValidateNotNull( nameof( message ), message ); |
| | 1 | 257 | | } |
| | 2 | 258 | | public NATSMessageImpl Message { get; } |
| | | 259 | | } |
| | | 260 | | |
| | | 261 | | |
| | | 262 | | private readonly ClientProtocolIOState _state; |
| | | 263 | | private readonly ServerInformation _serverParameters; |
| | | 264 | | private readonly Byte[] _globalSubscriptionNameBytes; |
| | | 265 | | private readonly ConcurrentDictionary<Int64, SubscriptionState> _subscriptionStates; |
| | | 266 | | private readonly AsyncLazy<Int64> _globalSubscriptionID; |
| | | 267 | | |
| | | 268 | | private Int64 _currentID; |
| | | 269 | | private Int64 _globalSubscriptionSuffix; |
| | | 270 | | |
| | 4 | 271 | | public ClientProtocol( |
| | 4 | 272 | | ClientProtocolIOState state, |
| | 4 | 273 | | ServerInformation serverParameters, |
| | 4 | 274 | | String globalSubscriptionName = null |
| | 4 | 275 | | ) |
| | | 276 | | { |
| | 4 | 277 | | this._state = ArgumentValidator.ValidateNotNull( nameof( state ), state ); |
| | 4 | 278 | | this._subscriptionStates = new ConcurrentDictionary<Int64, SubscriptionState>(); |
| | 4 | 279 | | this._serverParameters = ArgumentValidator.ValidateNotNull( nameof( serverParameters ), serverParameters ); |
| | 4 | 280 | | this._currentID = 0; |
| | 4 | 281 | | this.GlobalSubscriptionPrefix = ( String.IsNullOrEmpty( globalSubscriptionName ) ? Guid.NewGuid().ToString( "N" |
| | 4 | 282 | | this._globalSubscriptionNameBytes = state.Encoding.Encoding.GetBytes( this.GlobalSubscriptionPrefix ); |
| | 5 | 283 | | this._globalSubscriptionID = new AsyncLazy<Int64>( async () => ( await this.WriteSubscribe( this.GlobalSubscrip |
| | 4 | 284 | | } |
| | | 285 | | |
| | | 286 | | |
| | 0 | 287 | | public Boolean CanBeReturnedToPool => this._subscriptionStates.Count <= 0 || this._subscriptionStates.Values.All( |
| | | 288 | | |
| | 4 | 289 | | public Stream Stream => this._state.Stream; |
| | | 290 | | |
| | 6 | 291 | | public String GlobalSubscriptionPrefix { get; } |
| | | 292 | | |
| | | 293 | | |
| | | 294 | | public event GenericEventHandler<GlobalSubscriptionEventArgs> GlobalSubscriptionMessageReceived; |
| | | 295 | | public event GenericEventHandler<AfterSubscriptionSentArgs> AfterSubscriptionSent; |
| | | 296 | | public event GenericEventHandler<AfterPublishSentArgs> AfterPublishSent; |
| | | 297 | | |
| | | 298 | | public Task<(Int64, TStoredState)> WriteSubscribe( |
| | | 299 | | String subject, |
| | | 300 | | String queue, |
| | | 301 | | Int64 autoUnsub |
| | 2 | 302 | | ) => this.WriteSubscribe( subject, queue, autoUnsub, false ); |
| | | 303 | | |
| | | 304 | | private async Task<(Int64, TStoredState)> WriteSubscribe( |
| | | 305 | | String subject, |
| | | 306 | | String queue, |
| | | 307 | | Int64 autoUnsub, |
| | | 308 | | Boolean isGlobal |
| | | 309 | | ) |
| | | 310 | | { |
| | 3 | 311 | | var state = this._state; |
| | 3 | 312 | | var wState = state.WriteState; |
| | 3 | 313 | | var id = Interlocked.Increment( ref this._currentID ); |
| | | 314 | | |
| | 3 | 315 | | using ( await wState.Lock.LockAsync() ) |
| | | 316 | | { |
| | 3 | 317 | | var buffer = wState.Buffer; |
| | 3 | 318 | | var encoding = state.Encoding; |
| | 3 | 319 | | var idx = 0; |
| | | 320 | | // Write 'SUB <subject> [queue group ]<sid>\r\n' |
| | 3 | 321 | | var idSize = encoding.GetTextualIntegerRepresentationSize( id ); |
| | 3 | 322 | | if ( !String.IsNullOrEmpty( queue ) && queue.ContainsNonASCIICharacters( NATSStatementInformationImpl.IsInva |
| | | 323 | | { |
| | 0 | 324 | | throw new InvalidOperationException( "Invalid queue name: " + queue ); |
| | | 325 | | } |
| | 3 | 326 | | var msgSize = 7 + subject.Length + ( String.IsNullOrEmpty( queue ) ? 0 : ( queue.Length + 1 ) ) + idSize; |
| | 3 | 327 | | var array = wState.Buffer.SetCapacityAndReturnArray( msgSize ); |
| | 3 | 328 | | array |
| | 3 | 329 | | .WriteASCIIString( ref idx, ClientProtocolConsts.SUB_PREFIX ) |
| | 3 | 330 | | .WriteASCIIString( ref idx, subject, false ) |
| | 3 | 331 | | .WriteASCIIString( ref idx, ClientProtocolConsts.SPACE ); |
| | | 332 | | |
| | 3 | 333 | | if ( !String.IsNullOrEmpty( queue ) ) |
| | | 334 | | { |
| | 0 | 335 | | array |
| | 0 | 336 | | .WriteASCIIString( ref idx, queue, false ) |
| | 0 | 337 | | .WriteASCIIString( ref idx, ClientProtocolConsts.SPACE ); |
| | | 338 | | } |
| | | 339 | | |
| | 3 | 340 | | encoding.WriteIntegerTextual( array, ref idx, id, idSize ); |
| | 3 | 341 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CRLF ); |
| | | 342 | | System.Diagnostics.Debug.Assert( idx == msgSize ); |
| | | 343 | | |
| | 3 | 344 | | await state.Stream.WriteAsync( array, 0, msgSize, default ); |
| | 3 | 345 | | if ( !isGlobal ) |
| | | 346 | | { |
| | 2 | 347 | | this.AfterSubscriptionSent?.InvokeAllEventHandlers( new AfterSubscriptionSentArgs( subject, queue, autoUn |
| | | 348 | | } |
| | 3 | 349 | | if ( autoUnsub > 0 ) |
| | | 350 | | { |
| | 1 | 351 | | await this.PerformUnsubscribe( id, autoUnsub ); |
| | | 352 | | } |
| | 3 | 353 | | await state.Stream.FlushAsync( default ); |
| | | 354 | | |
| | 3 | 355 | | } |
| | | 356 | | |
| | 3 | 357 | | var retVal = new SubscriptionState( subject, id, isGlobal ); |
| | 3 | 358 | | if ( !this._subscriptionStates.TryAdd( id, retVal ) ) |
| | | 359 | | { |
| | 0 | 360 | | throw new Exception( "This should not be possible." ); |
| | | 361 | | } |
| | | 362 | | |
| | 3 | 363 | | return (id, retVal.MessageQueue); |
| | 3 | 364 | | } |
| | | 365 | | |
| | | 366 | | public Task EnumerationEnded( |
| | | 367 | | Int64 id, |
| | | 368 | | Boolean hasAutoUnSub, |
| | | 369 | | Int64 currentAutoUnsub |
| | | 370 | | |
| | | 371 | | ) |
| | | 372 | | { |
| | | 373 | | Task retVal; |
| | 2 | 374 | | if ( hasAutoUnSub && currentAutoUnsub < 0 ) |
| | | 375 | | { |
| | 0 | 376 | | this._subscriptionStates.TryRemove( id, out var ignored ); |
| | 0 | 377 | | retVal = TaskUtils.CompletedTask; |
| | 0 | 378 | | } |
| | | 379 | | else |
| | | 380 | | { |
| | 2 | 381 | | retVal = this.WriteUnsubscribe( id, 0 ); |
| | | 382 | | } |
| | | 383 | | |
| | 2 | 384 | | return retVal; |
| | | 385 | | } |
| | | 386 | | |
| | | 387 | | public async Task WriteUnsubscribe( |
| | | 388 | | Int64 id, |
| | | 389 | | Int64 autoUnsubscribe |
| | | 390 | | ) |
| | | 391 | | { |
| | 2 | 392 | | if ( autoUnsubscribe <= 0 ) |
| | | 393 | | { |
| | 2 | 394 | | this._subscriptionStates.TryRemove( id, out var ignored ); |
| | | 395 | | } |
| | | 396 | | |
| | 2 | 397 | | var state = this._state; |
| | 2 | 398 | | var wState = state.WriteState; |
| | 2 | 399 | | using ( await wState.Lock.LockAsync() ) |
| | | 400 | | { |
| | 2 | 401 | | await this.PerformUnsubscribe( id, autoUnsubscribe ); |
| | 2 | 402 | | await state.Stream.FlushAsync( default ); |
| | 2 | 403 | | } |
| | | 404 | | |
| | 2 | 405 | | } |
| | | 406 | | |
| | | 407 | | private async Task PerformUnsubscribe( |
| | | 408 | | Int64 id, |
| | | 409 | | Int64 autoUnsubscribe |
| | | 410 | | ) |
| | | 411 | | { |
| | 3 | 412 | | var state = this._state; |
| | 3 | 413 | | var wState = state.WriteState; |
| | 3 | 414 | | var encoding = state.Encoding; |
| | 3 | 415 | | var idSize = encoding.GetTextualIntegerRepresentationSize( id ); |
| | 3 | 416 | | var autoSize = autoUnsubscribe > 0 ? encoding.GetTextualIntegerRepresentationSize( autoUnsubscribe ) : 0; |
| | 3 | 417 | | var msgSize = 8 + idSize + ( autoSize > 0 ? ( autoSize + 1 ) : 0 ); |
| | 3 | 418 | | var array = wState.Buffer.SetCapacityAndReturnArray( msgSize ); |
| | 3 | 419 | | var idx = 0; |
| | 3 | 420 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.UNSUB_PREFIX ); |
| | 3 | 421 | | encoding.WriteIntegerTextual( array, ref idx, id, idSize ); |
| | 3 | 422 | | if ( autoSize > 0 ) |
| | | 423 | | { |
| | 1 | 424 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.SPACE ); |
| | 1 | 425 | | encoding.WriteIntegerTextual( array, ref idx, autoUnsubscribe, autoSize ); |
| | | 426 | | } |
| | 3 | 427 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CRLF ); |
| | | 428 | | System.Diagnostics.Debug.Assert( idx == msgSize ); |
| | 3 | 429 | | await state.Stream.WriteAsync( array, 0, msgSize, default ); |
| | 3 | 430 | | } |
| | | 431 | | |
| | | 432 | | public async Task WritePublish( |
| | | 433 | | IEnumerable<NATSPublishData> datas |
| | | 434 | | ) |
| | | 435 | | { |
| | 3 | 436 | | var state = this._state; |
| | 3 | 437 | | var wState = state.WriteState; |
| | 3 | 438 | | using ( await wState.Lock.LockAsync() ) |
| | | 439 | | { |
| | 3 | 440 | | var buffer = wState.Buffer; |
| | 3 | 441 | | var encoding = state.Encoding; |
| | | 442 | | |
| | 12 | 443 | | foreach ( var pData in datas ) |
| | | 444 | | { |
| | 3 | 445 | | var subject = pData.Subject; |
| | 3 | 446 | | if ( !String.IsNullOrEmpty( subject ) ) |
| | | 447 | | { |
| | 3 | 448 | | var count = pData.Count; |
| | 3 | 449 | | var reply = pData.ReplySubject; |
| | | 450 | | |
| | 3 | 451 | | var dataMsgSize = encoding.GetTextualIntegerRepresentationSize( count ); |
| | 3 | 452 | | var msgSize = 9 + subject.Length + ( String.IsNullOrEmpty( reply ) ? 0 : ( reply.Length + 1 ) ) + data |
| | 3 | 453 | | var array = wState.Buffer.SetCapacityAndReturnArray( msgSize ); |
| | | 454 | | |
| | 3 | 455 | | var idx = 0; |
| | 3 | 456 | | array |
| | 3 | 457 | | .WriteASCIIString( ref idx, ClientProtocolConsts.PUB_PREFIX ) |
| | 3 | 458 | | .WriteASCIIString( ref idx, subject, false ) |
| | 3 | 459 | | .WriteASCIIString( ref idx, ClientProtocolConsts.SPACE ); |
| | 3 | 460 | | if ( !String.IsNullOrEmpty( reply ) ) |
| | | 461 | | { |
| | 1 | 462 | | array |
| | 1 | 463 | | .WriteASCIIString( ref idx, reply, false ) |
| | 1 | 464 | | .WriteASCIIString( ref idx, ClientProtocolConsts.SPACE ); |
| | | 465 | | } |
| | 3 | 466 | | encoding.WriteIntegerTextual( array, ref idx, count, dataMsgSize ); |
| | 3 | 467 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CRLF ); |
| | | 468 | | |
| | 3 | 469 | | if ( count > 0 ) |
| | | 470 | | { |
| | 3 | 471 | | Array.Copy( pData.Data, pData.Offset, array, idx, count ); |
| | 3 | 472 | | idx += count; |
| | | 473 | | } |
| | | 474 | | |
| | 3 | 475 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CRLF ); |
| | | 476 | | |
| | | 477 | | System.Diagnostics.Debug.Assert( idx == msgSize ); |
| | 3 | 478 | | await state.Stream.WriteAsync( array, 0, msgSize, default ); |
| | | 479 | | |
| | 3 | 480 | | this.AfterPublishSent?.InvokeAllEventHandlers( new AfterPublishSentArgs( subject, reply ), throwExcept |
| | 3 | 481 | | } |
| | 3 | 482 | | } |
| | | 483 | | |
| | 3 | 484 | | await state.Stream.FlushAsync( default ); |
| | 3 | 485 | | } |
| | | 486 | | |
| | 3 | 487 | | } |
| | | 488 | | |
| | | 489 | | private async Task WritePong() |
| | | 490 | | { |
| | 0 | 491 | | var state = this._state; |
| | 0 | 492 | | using ( await state.WriteState.Lock.LockAsync() ) |
| | | 493 | | { |
| | 0 | 494 | | await state.Stream.WriteAsync( ClientProtocolConsts.PONG, 0, 6, default ); |
| | 0 | 495 | | await state.Stream.FlushAsync( default ); |
| | 0 | 496 | | } |
| | 0 | 497 | | } |
| | | 498 | | |
| | | 499 | | public async ValueTask<Boolean> PerformReadNext( |
| | | 500 | | Int64 subscriptionID |
| | | 501 | | ) |
| | | 502 | | { |
| | 2 | 503 | | if ( this._subscriptionStates.TryGetValue( subscriptionID, out var subState ) ) |
| | | 504 | | { |
| | 2 | 505 | | var pool = subState.ByteArrayPool; |
| | 4 | 506 | | foreach ( var rentedByteArray in subState.RentedByteArrays ) |
| | | 507 | | { |
| | 0 | 508 | | pool.ReturnInstance( rentedByteArray ); |
| | | 509 | | } |
| | | 510 | | |
| | 2 | 511 | | subState.RentedByteArrays.Clear(); |
| | 2 | 512 | | var queue = subState.MessageQueue; |
| | 4 | 513 | | while ( queue.Count <= 0 ) |
| | | 514 | | { |
| | 2 | 515 | | var rLock = this._state.ReadState.Lock; |
| | 2 | 516 | | if ( queue.Count <= 0 ) |
| | | 517 | | { |
| | 2 | 518 | | var lockScope = await rLock.TryLockAsync( TimeSpan.FromMilliseconds( 100 ) ); |
| | 2 | 519 | | if ( lockScope.HasValue ) |
| | | 520 | | { |
| | 2 | 521 | | using ( lockScope.Value ) |
| | | 522 | | { |
| | 2 | 523 | | if ( queue.Count <= 0 ) |
| | | 524 | | { |
| | 2 | 525 | | await this.PerformRead(); |
| | | 526 | | } |
| | 2 | 527 | | } |
| | | 528 | | } |
| | | 529 | | } |
| | | 530 | | } |
| | 2 | 531 | | } |
| | | 532 | | |
| | 2 | 533 | | return ( subState?.MessageQueue?.Count ?? 0 ) > 0; |
| | | 534 | | |
| | 2 | 535 | | } |
| | | 536 | | |
| | | 537 | | public async Task<NATSMessage> RequestAsync( String subject, Byte[] data, Int32 offset, Int32 count ) |
| | | 538 | | { |
| | 1 | 539 | | await this._globalSubscriptionID; |
| | | 540 | | |
| | 1 | 541 | | var replyTo = this.GlobalSubscriptionPrefix + Interlocked.Increment( ref this._globalSubscriptionSuffix ); |
| | 1 | 542 | | NATSMessage receivedMessage = null; |
| | | 543 | | void HandleGlobalSubEvent( GlobalSubscriptionEventArgs args ) |
| | | 544 | | { |
| | 1 | 545 | | if ( String.Equals( args.Message.Subject, replyTo ) ) |
| | | 546 | | { |
| | 1 | 547 | | Interlocked.Exchange( ref receivedMessage, args.Message ); |
| | | 548 | | } |
| | 1 | 549 | | }; |
| | | 550 | | |
| | 1 | 551 | | this.GlobalSubscriptionMessageReceived += HandleGlobalSubEvent; |
| | 2 | 552 | | using ( new UsingHelper( () => this.GlobalSubscriptionMessageReceived -= HandleGlobalSubEvent ) ) |
| | | 553 | | { |
| | 1 | 554 | | await this.WritePublish( |
| | 1 | 555 | | new NATSPublishData( subject, data, offset, count, replyTo ).Singleton() |
| | 1 | 556 | | ); |
| | 1 | 557 | | var rLock = this._state.ReadState.Lock; |
| | | 558 | | do |
| | | 559 | | { |
| | 1 | 560 | | var lockScope = await rLock.TryLockAsync( TimeSpan.FromMilliseconds( 100 ) ); |
| | 1 | 561 | | if ( lockScope.HasValue ) |
| | | 562 | | { |
| | 1 | 563 | | using ( lockScope ) |
| | | 564 | | { |
| | 1 | 565 | | if ( receivedMessage == null ) |
| | | 566 | | { |
| | 1 | 567 | | await this.PerformRead(); |
| | | 568 | | } |
| | 1 | 569 | | } |
| | | 570 | | } |
| | 1 | 571 | | } while ( receivedMessage == null ); |
| | | 572 | | |
| | 1 | 573 | | } |
| | | 574 | | |
| | 1 | 575 | | return receivedMessage; |
| | 1 | 576 | | } |
| | | 577 | | |
| | | 578 | | |
| | | 579 | | private async Task PerformRead() |
| | | 580 | | { |
| | 3 | 581 | | var states = this._subscriptionStates; |
| | | 582 | | //const Int32 MIN_MESSAGE_SIZE = 5; |
| | | 583 | | |
| | 3 | 584 | | var state = this._state; |
| | 3 | 585 | | var rState = state.ReadState; |
| | 3 | 586 | | var stream = state.Stream; |
| | 3 | 587 | | var buffer = rState.Buffer; |
| | 3 | 588 | | var encodingInfo = state.Encoding; |
| | 3 | 589 | | var stringPool = state.StringPool; |
| | | 590 | | |
| | 3 | 591 | | var advanceState = rState.BufferAdvanceState; |
| | | 592 | | |
| | 3 | 593 | | await stream.ReadUntilMaybeAsync( buffer, advanceState, ClientProtocolConsts.CRLF, ClientProtocolConsts.READ_CO |
| | 3 | 594 | | var crIdx = advanceState.BufferOffset; |
| | 6 | 595 | | while ( crIdx >= 0 ) |
| | | 596 | | { |
| | 3 | 597 | | var array = buffer.Array; |
| | | 598 | | // First byte will be integer's uppermost byte, second byte second uppermost, etc |
| | 3 | 599 | | var idx = 0; |
| | 3 | 600 | | var msgHeader = array.ReadInt32BEFromBytes( ref idx ); |
| | 3 | 601 | | var additionalByte = array[idx++]; |
| | | 602 | | // At the end of the following switch statement, advanceState.BufferOffset should point to the CR byte of th |
| | | 603 | | // Examine first byte |
| | | 604 | | // x & 0x5F is to make ASCII lowercase letters (a-z) into uppercase letters (A-Z) |
| | 3 | 605 | | switch ( msgHeader & 0xFF000000 ) |
| | | 606 | | { |
| | | 607 | | case 0x2B000000: // 2B = '+' |
| | 0 | 608 | | if ( ( msgHeader & 0x005F5FFF ) == 0x004F4B0D && additionalByte == 0x0A ) // +OK\r\n |
| | | 609 | | { |
| | | 610 | | // OK -message -> ignore |
| | | 611 | | } |
| | | 612 | | else |
| | | 613 | | { |
| | 0 | 614 | | throw new Exception( "Protocol error" ); |
| | | 615 | | } |
| | | 616 | | break; |
| | | 617 | | case 0x2D000000: // 2D = '-' |
| | 0 | 618 | | if ( ( msgHeader & 0x005F5F5F ) == 0x00455252 && ( additionalByte == ClientProtocolConsts.SPACE || add |
| | | 619 | | { |
| | | 620 | | // -ERR<space/tab> -message, read textual error message |
| | | 621 | | // TODO close connection on errors that are fatal |
| | 0 | 622 | | throw new Exception( "Protocol error: " + stringPool.GetString( buffer.Array, idx, advanceState.Buf |
| | | 623 | | } |
| | | 624 | | else |
| | | 625 | | { |
| | 0 | 626 | | throw new Exception( "Protocol error" ); |
| | | 627 | | } |
| | | 628 | | default: |
| | 3 | 629 | | if ( ( msgHeader & 0x5F5F5F00 ) == 0x4D534700 ) // MSG |
| | | 630 | | { |
| | 3 | 631 | | additionalByte = (Byte) ( msgHeader & 0x000000FF ); |
| | 3 | 632 | | if ( additionalByte == ClientProtocolConsts.SPACE || additionalByte == ClientProtocolConsts.TAB ) |
| | | 633 | | { |
| | | 634 | | // Read the rest of the header |
| | 3 | 635 | | array = buffer.Array; |
| | | 636 | | |
| | | 637 | | // Count spaces/tabs (TODO make this treat multiple consecutive spaces as one) |
| | 3 | 638 | | var spacesSeen = 0; |
| | 3 | 639 | | var spaceIndices = rState.MessageSpaceIndices; |
| | 3 | 640 | | Array.Clear( spaceIndices, 0, spaceIndices.Length ); |
| | 3 | 641 | | var end = advanceState.BufferOffset; |
| | 214 | 642 | | for ( var i = idx; i < end; ++i ) |
| | | 643 | | { |
| | 104 | 644 | | if ( array[i] == ClientProtocolConsts.SPACE || array[i] == ClientProtocolConsts.TAB ) |
| | | 645 | | { |
| | 7 | 646 | | var oldValue = spaceIndices[spacesSeen]; |
| | 7 | 647 | | spaceIndices[spacesSeen] = i; |
| | 7 | 648 | | if ( oldValue < i - 1 ) |
| | | 649 | | { |
| | 7 | 650 | | ++spacesSeen; |
| | | 651 | | } |
| | | 652 | | } |
| | | 653 | | } |
| | 3 | 654 | | if ( spacesSeen < 2 || spacesSeen > 3 ) |
| | | 655 | | { |
| | 0 | 656 | | throw new Exception( "Protocol error" ); |
| | | 657 | | } |
| | | 658 | | |
| | | 659 | | // MSG <subject> <sid> [reply-to] <#bytes>\r\n[payload]\r\n |
| | 3 | 660 | | var subjStart = idx - 1; |
| | 3 | 661 | | var subjLen = spaceIndices[0] - subjStart; |
| | 3 | 662 | | idx = spaceIndices[0] + 1; |
| | 3 | 663 | | var subID = encodingInfo.ParseInt64Textual( array, ref idx, (spaceIndices[1] - spaceIndices[0] - |
| | 3 | 664 | | var replyTo = spacesSeen > 2 ? |
| | 3 | 665 | | stringPool.GetString( array, spaceIndices[1] + 1, spaceIndices[2] - spaceIndices[1] - 1 ) : |
| | 3 | 666 | | null; |
| | 3 | 667 | | idx = spaceIndices[spacesSeen - 1] + 1; |
| | 3 | 668 | | var payloadSize = encodingInfo.ParseInt32Textual( array, ref idx, (end - idx, true) ); |
| | 3 | 669 | | if ( payloadSize < 0 ) |
| | | 670 | | { |
| | 0 | 671 | | throw new Exception( "Protocol error" ); |
| | | 672 | | } |
| | 3 | 673 | | var readFromStreamCount = end + 2 + payloadSize + 2 - advanceState.BufferTotal; |
| | 3 | 674 | | if ( readFromStreamCount > 0 ) |
| | | 675 | | { |
| | 0 | 676 | | await stream.ReadSpecificAmountAsync( buffer, advanceState.BufferTotal, readFromStreamCount, |
| | 0 | 677 | | advanceState.ReadMore( readFromStreamCount ); |
| | | 678 | | } |
| | 3 | 679 | | if ( states.TryGetValue( subID, out var subState ) ) |
| | | 680 | | { |
| | | 681 | | NATSMessageImpl readMessage; |
| | 3 | 682 | | if ( replyTo == null && payloadSize <= 0 && subState.CachedMessage != null ) |
| | | 683 | | { |
| | | 684 | | // Use cached instance when no reply, no data, and same subject |
| | 0 | 685 | | readMessage = subState.CachedMessage; |
| | 0 | 686 | | } |
| | | 687 | | else |
| | | 688 | | { |
| | | 689 | | // TODO we can pool & rent NATSMessageImpl instances too, for when there is no reply and s |
| | | 690 | | // Rent byte array instance and make the message use it |
| | 3 | 691 | | var byteArrayInstance = subState.ByteArrayPool.TakeInstance() ?? new InstanceHolder<Resiza |
| | 3 | 692 | | subState.RentedByteArrays.Add( byteArrayInstance ); |
| | 3 | 693 | | var messageData = byteArrayInstance.Instance.SetCapacityAndReturnArray( payloadSize ); |
| | 3 | 694 | | Array.Copy( buffer.Array, end + 2, messageData, 0, payloadSize ); |
| | 3 | 695 | | readMessage = new NATSMessageImpl( stringPool.GetString( array, subjStart, subjLen ), subI |
| | | 696 | | } |
| | | 697 | | |
| | | 698 | | |
| | 3 | 699 | | if ( subState.IsGlobal ) |
| | | 700 | | { |
| | 1 | 701 | | this.GlobalSubscriptionMessageReceived?.Invoke( new GlobalSubscriptionEventArgs( readMessa |
| | 1 | 702 | | } |
| | | 703 | | else |
| | | 704 | | { |
| | 2 | 705 | | subState.MessageQueue.Enqueue( readMessage ); |
| | | 706 | | } |
| | | 707 | | } |
| | | 708 | | |
| | 3 | 709 | | advanceState.Advance( payloadSize + 2 ); |
| | 3 | 710 | | } |
| | | 711 | | else |
| | | 712 | | { |
| | 0 | 713 | | throw new Exception( "Protocol error" ); |
| | | 714 | | } |
| | | 715 | | } |
| | | 716 | | else |
| | | 717 | | { |
| | 0 | 718 | | var additionalByte2 = array[idx++]; |
| | 0 | 719 | | switch ( msgHeader & ClientProtocolConsts.UPPERCASE_MASK_FULL ) |
| | | 720 | | { |
| | | 721 | | case 0x50494E47: // PING |
| | 0 | 722 | | if ( additionalByte == ClientProtocolConsts.CR && additionalByte2 == ClientProtocolConsts.LF |
| | | 723 | | { |
| | | 724 | | // Send back PONG ( we purposefully don't 'await' for this task) |
| | | 725 | | #pragma warning disable 4014 |
| | 0 | 726 | | this.WritePong(); |
| | | 727 | | #pragma warning restore 4014 |
| | 0 | 728 | | } |
| | | 729 | | else |
| | | 730 | | { |
| | 0 | 731 | | throw new Exception( "Protocol error" ); |
| | | 732 | | } |
| | | 733 | | break; |
| | | 734 | | case 0x504F4E47: // PONG |
| | | 735 | | // Currently, unused, since client never sends pings. |
| | 0 | 736 | | if ( additionalByte == ClientProtocolConsts.CR && additionalByte2 == ClientProtocolConsts.LF |
| | | 737 | | { |
| | | 738 | | } |
| | | 739 | | else |
| | | 740 | | { |
| | 0 | 741 | | throw new Exception( "Protocol error" ); |
| | | 742 | | } |
| | | 743 | | break; |
| | | 744 | | case ClientProtocolConsts.INFO_INT: // INFO |
| | 0 | 745 | | if ( additionalByte == ClientProtocolConsts.SPACE || additionalByte == ClientProtocolConsts.T |
| | | 746 | | { |
| | 0 | 747 | | var info = DeserializeInfoMessage( buffer.Array, idx, advanceState.BufferOffset - idx, enc |
| | | 748 | | // TODO implement dynamic handling of INFO message |
| | 0 | 749 | | } |
| | | 750 | | else |
| | | 751 | | { |
| | 0 | 752 | | throw new Exception( "Protocol error" ); |
| | | 753 | | } |
| | | 754 | | break; |
| | | 755 | | default: |
| | 0 | 756 | | throw new Exception( "Protocol error" ); |
| | | 757 | | } |
| | | 758 | | } |
| | | 759 | | break; |
| | | 760 | | } |
| | | 761 | | |
| | | 762 | | // Remember to shift remaining data to the beginning of byte array |
| | | 763 | | // TODO optimize: we don't need to do this on every loop. |
| | 3 | 764 | | SetPreReadLength( rState ); |
| | 3 | 765 | | crIdx = array.IndexOfArray( 0, advanceState.BufferTotal, ClientProtocolConsts.CRLF ); |
| | 3 | 766 | | advanceState.Advance( crIdx < 0 ? advanceState.BufferTotal : crIdx ); |
| | 3 | 767 | | } |
| | 3 | 768 | | } |
| | | 769 | | |
| | | 770 | | internal static void SetPreReadLength( ReadState rState ) |
| | | 771 | | { |
| | 7 | 772 | | var aState = rState.BufferAdvanceState; |
| | 7 | 773 | | var end = aState.BufferOffset; |
| | 7 | 774 | | var preReadLength = aState.BufferTotal; |
| | | 775 | | // Messages end with CRLF |
| | 7 | 776 | | end += 2; |
| | 7 | 777 | | var remainingData = preReadLength - end; |
| | 7 | 778 | | if ( remainingData > 0 ) |
| | | 779 | | { |
| | 0 | 780 | | var array = rState.Buffer.Array; |
| | 0 | 781 | | Array.Copy( array, end, array, 0, remainingData ); |
| | | 782 | | } |
| | 7 | 783 | | aState.Reset(); |
| | 7 | 784 | | aState.ReadMore( remainingData ); |
| | | 785 | | |
| | 7 | 786 | | } |
| | | 787 | | |
| | | 788 | | internal static ServerInformation DeserializeInfoMessage( Byte[] array, Int32 offset, Int32 count, Encoding encodi |
| | | 789 | | { |
| | 4 | 790 | | using ( var mStream = new MemoryStream( array, offset, count ) ) |
| | 4 | 791 | | using ( var reader = new StreamReader( mStream, encoding ) ) |
| | 4 | 792 | | using ( var jReader = new JsonTextReader( reader ) ) |
| | | 793 | | { |
| | | 794 | | // return (JObject) JToken.Load( jReader ); |
| | 4 | 795 | | return JsonSerializer.CreateDefault().Deserialize<ServerInformation>( jReader ); |
| | | 796 | | } |
| | 4 | 797 | | } |
| | | 798 | | |
| | | 799 | | internal static Byte[] SerializeConnectMessage( ClientInformation clientInfo, Encoding encoding ) |
| | | 800 | | { |
| | 4 | 801 | | using ( var mStream = new MemoryStream( 0x100 ) ) |
| | | 802 | | { |
| | 4 | 803 | | using ( var writer = new StreamWriter( mStream, encoding ) ) |
| | | 804 | | { |
| | 4 | 805 | | JsonSerializer.CreateDefault().Serialize( writer, clientInfo ); |
| | 4 | 806 | | writer.Flush(); |
| | 4 | 807 | | return mStream.ToArray(); |
| | | 808 | | } |
| | | 809 | | } |
| | 4 | 810 | | } |
| | | 811 | | |
| | | 812 | | internal static async Task InitializeNewConnection( |
| | | 813 | | ClientInformation clientInfo, |
| | | 814 | | Encoding encoding, |
| | | 815 | | WriteState wState, |
| | | 816 | | Stream stream, |
| | | 817 | | CancellationToken token |
| | | 818 | | ) |
| | | 819 | | { |
| | 4 | 820 | | var connectBytes = SerializeConnectMessage( clientInfo, encoding ); |
| | | 821 | | |
| | 4 | 822 | | var msgLength = 10 + connectBytes.Length; |
| | 4 | 823 | | var array = wState.Buffer.SetCapacityAndReturnArray( msgLength ); |
| | 4 | 824 | | var idx = 0; |
| | 4 | 825 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CONNECT_PREFIX ); |
| | 4 | 826 | | connectBytes.CopyTo( array, idx ); |
| | 4 | 827 | | idx += connectBytes.Length; |
| | 4 | 828 | | array.WriteASCIIString( ref idx, ClientProtocolConsts.CRLF ); |
| | | 829 | | |
| | 4 | 830 | | await stream.WriteAsync( array, 0, msgLength, token ); |
| | 4 | 831 | | await stream.FlushAsync( token ); |
| | 4 | 832 | | } |
| | | 833 | | } |
| | | 834 | | } |
| | | 835 | | |