| | | 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 AsyncEnumeration.Abstractions; |
| | | 19 | | using AsyncEnumeration.Implementation.Enumerable; |
| | | 20 | | using AsyncEnumeration.Observability; |
| | | 21 | | using CBAM.Abstractions; |
| | | 22 | | using CBAM.Abstractions.Implementation; |
| | | 23 | | using CBAM.NATS; |
| | | 24 | | using Newtonsoft.Json; |
| | | 25 | | using Newtonsoft.Json.Linq; |
| | | 26 | | using System; |
| | | 27 | | using System.Collections.Concurrent; |
| | | 28 | | using System.Collections.Generic; |
| | | 29 | | using System.IO; |
| | | 30 | | using System.Net.Sockets; |
| | | 31 | | using System.Text; |
| | | 32 | | using System.Threading; |
| | | 33 | | using System.Threading.Tasks; |
| | | 34 | | using UtilPack; |
| | | 35 | | |
| | | 36 | | using TDataProducerResult = System.Threading.Tasks.ValueTask<System.Collections.Generic.IEnumerable<CBAM.NATS.NATSPublis |
| | | 37 | | |
| | | 38 | | namespace CBAM.NATS |
| | | 39 | | { |
| | | 40 | | using TDataProducer = Func<TDataProducerResult>; |
| | | 41 | | |
| | | 42 | | namespace Implementation |
| | | 43 | | { |
| | | 44 | | |
| | | 45 | | using TDataProducerFactory = Func<TDataProducer>; |
| | | 46 | | |
| | | 47 | | internal sealed class NATSConnectionImpl : NATSConnection |
| | | 48 | | { |
| | | 49 | | |
| | | 50 | | public sealed class NATSSubscribeConnectionImpl : ConnectionImpl<NATSSubscribeStatement, NATSSubscribeStatement |
| | | 51 | | { |
| | | 52 | | public NATSSubscribeConnectionImpl( |
| | | 53 | | NATSSubscribeConnectionFunctionality functionality |
| | | 54 | | ) : base( functionality ) |
| | | 55 | | { |
| | | 56 | | } |
| | | 57 | | } |
| | | 58 | | |
| | | 59 | | public sealed class NATSPublishConnectionImpl : ConnectionImpl<NATSPublishStatement, NATSPublishStatementInform |
| | | 60 | | { |
| | | 61 | | public NATSPublishConnectionImpl( |
| | | 62 | | NATSPublishConnectionFunctionality functionality |
| | | 63 | | ) : base( functionality ) |
| | | 64 | | { |
| | | 65 | | } |
| | | 66 | | } |
| | | 67 | | |
| | | 68 | | //private readonly Socket _socket; |
| | | 69 | | private readonly ClientProtocol _protocol; |
| | | 70 | | private readonly NATSSubscribeConnectionImpl _subscribe; |
| | | 71 | | private readonly NATSPublishConnectionImpl _publish; |
| | | 72 | | |
| | | 73 | | public NATSConnectionImpl( |
| | | 74 | | //Socket socket, |
| | | 75 | | NATSConnectionVendorFunctionalityImpl vendorFunctionality, |
| | | 76 | | ClientProtocol protocol |
| | | 77 | | ) |
| | | 78 | | { |
| | | 79 | | this.VendorFunctionality = ArgumentValidator.ValidateNotNull( nameof( vendorFunctionality ), vendorFunctiona |
| | | 80 | | //this._socket = ArgumentValidator.ValidateNotNull( nameof( socket ), socket ); |
| | | 81 | | this._protocol = ArgumentValidator.ValidateNotNull( nameof( protocol ), protocol ); |
| | | 82 | | this._subscribe = new NATSSubscribeConnectionImpl( new NATSSubscribeConnectionFunctionality( vendorFunctiona |
| | | 83 | | this._publish = new NATSPublishConnectionImpl( new NATSPublishConnectionFunctionality( vendorFunctionality, |
| | | 84 | | } |
| | | 85 | | |
| | | 86 | | public NATSConnectionVendorFunctionality VendorFunctionality { get; } |
| | | 87 | | |
| | | 88 | | public Boolean DisableEnumerableObservability { get; set; } |
| | | 89 | | |
| | | 90 | | event GenericEventHandler<EnumerationStartedEventArgs<NATSSubscribeStatementInformation>> AsyncEnumerationObser |
| | | 91 | | { |
| | | 92 | | add |
| | | 93 | | { |
| | | 94 | | this._subscribe.BeforeEnumerationStart += value; |
| | | 95 | | } |
| | | 96 | | remove |
| | | 97 | | { |
| | | 98 | | this._subscribe.BeforeEnumerationEnd -= value; |
| | | 99 | | } |
| | | 100 | | } |
| | | 101 | | |
| | | 102 | | event GenericEventHandler<EnumerationStartedEventArgs> AsyncEnumerationObservation<NATSMessage>.BeforeEnumerati |
| | | 103 | | { |
| | | 104 | | add |
| | | 105 | | { |
| | | 106 | | this._subscribe.BeforeEnumerationStart += value; |
| | | 107 | | } |
| | | 108 | | remove |
| | | 109 | | { |
| | | 110 | | this._subscribe.BeforeEnumerationStart -= value; |
| | | 111 | | } |
| | | 112 | | } |
| | | 113 | | |
| | | 114 | | event GenericEventHandler<EnumerationStartedEventArgs<NATSSubscribeStatementInformation>> AsyncEnumerationObser |
| | | 115 | | { |
| | | 116 | | add |
| | | 117 | | { |
| | | 118 | | this._subscribe.AfterEnumerationStart += value; |
| | | 119 | | } |
| | | 120 | | remove |
| | | 121 | | { |
| | | 122 | | this._subscribe.AfterEnumerationStart -= value; |
| | | 123 | | } |
| | | 124 | | } |
| | | 125 | | |
| | | 126 | | event GenericEventHandler<EnumerationStartedEventArgs> AsyncEnumerationObservation<NATSMessage>.AfterEnumeratio |
| | | 127 | | { |
| | | 128 | | add |
| | | 129 | | { |
| | | 130 | | this._subscribe.AfterEnumerationStart += value; |
| | | 131 | | } |
| | | 132 | | |
| | | 133 | | remove |
| | | 134 | | { |
| | | 135 | | this._subscribe.AfterEnumerationStart -= value; |
| | | 136 | | } |
| | | 137 | | } |
| | | 138 | | |
| | | 139 | | event GenericEventHandler<EnumerationItemEventArgs<NATSMessage, NATSSubscribeStatementInformation>> AsyncEnumer |
| | | 140 | | { |
| | | 141 | | add |
| | | 142 | | { |
| | | 143 | | this._subscribe.AfterEnumerationItemEncountered += value; |
| | | 144 | | } |
| | | 145 | | remove |
| | | 146 | | { |
| | | 147 | | this._subscribe.AfterEnumerationItemEncountered -= value; |
| | | 148 | | } |
| | | 149 | | } |
| | | 150 | | |
| | | 151 | | event GenericEventHandler<EnumerationItemEventArgs<NATSMessage>> AsyncEnumerationObservation<NATSMessage>.After |
| | | 152 | | { |
| | | 153 | | add |
| | | 154 | | { |
| | | 155 | | this._subscribe.AfterEnumerationItemEncountered += value; |
| | | 156 | | } |
| | | 157 | | remove |
| | | 158 | | { |
| | | 159 | | this._subscribe.AfterEnumerationItemEncountered -= value; |
| | | 160 | | } |
| | | 161 | | } |
| | | 162 | | |
| | | 163 | | event GenericEventHandler<EnumerationEndedEventArgs<NATSSubscribeStatementInformation>> AsyncEnumerationObserva |
| | | 164 | | { |
| | | 165 | | add |
| | | 166 | | { |
| | | 167 | | this._subscribe.BeforeEnumerationEnd += value; |
| | | 168 | | } |
| | | 169 | | remove |
| | | 170 | | { |
| | | 171 | | this._subscribe.BeforeEnumerationEnd -= value; |
| | | 172 | | } |
| | | 173 | | } |
| | | 174 | | |
| | | 175 | | event GenericEventHandler<EnumerationEndedEventArgs> AsyncEnumerationObservation<NATSMessage>.BeforeEnumeration |
| | | 176 | | { |
| | | 177 | | add |
| | | 178 | | { |
| | | 179 | | this._subscribe.BeforeEnumerationEnd += value; |
| | | 180 | | } |
| | | 181 | | remove |
| | | 182 | | { |
| | | 183 | | this._subscribe.BeforeEnumerationEnd -= value; |
| | | 184 | | } |
| | | 185 | | } |
| | | 186 | | |
| | | 187 | | event GenericEventHandler<EnumerationEndedEventArgs<NATSSubscribeStatementInformation>> AsyncEnumerationObserva |
| | | 188 | | { |
| | | 189 | | add |
| | | 190 | | { |
| | | 191 | | this._subscribe.AfterEnumerationEnd += value; |
| | | 192 | | } |
| | | 193 | | remove |
| | | 194 | | { |
| | | 195 | | this._subscribe.AfterEnumerationEnd -= value; |
| | | 196 | | } |
| | | 197 | | } |
| | | 198 | | |
| | | 199 | | event GenericEventHandler<EnumerationEndedEventArgs> AsyncEnumerationObservation<NATSMessage>.AfterEnumerationE |
| | | 200 | | { |
| | | 201 | | add |
| | | 202 | | { |
| | | 203 | | this._subscribe.AfterEnumerationEnd += value; |
| | | 204 | | } |
| | | 205 | | remove |
| | | 206 | | { |
| | | 207 | | this._subscribe.AfterEnumerationEnd -= value; |
| | | 208 | | } |
| | | 209 | | } |
| | | 210 | | |
| | | 211 | | |
| | | 212 | | |
| | | 213 | | |
| | | 214 | | event GenericEventHandler<EnumerationStartedEventArgs<NATSPublishStatementInformation>> AsyncEnumerationObserva |
| | | 215 | | { |
| | | 216 | | add |
| | | 217 | | { |
| | | 218 | | this._publish.BeforeEnumerationStart += value; |
| | | 219 | | } |
| | | 220 | | remove |
| | | 221 | | { |
| | | 222 | | this._publish.BeforeEnumerationStart -= value; |
| | | 223 | | } |
| | | 224 | | } |
| | | 225 | | |
| | | 226 | | event GenericEventHandler<EnumerationStartedEventArgs> AsyncEnumerationObservation<NATSPublishCompleted>.Before |
| | | 227 | | { |
| | | 228 | | add |
| | | 229 | | { |
| | | 230 | | this._publish.BeforeEnumerationStart += value; |
| | | 231 | | } |
| | | 232 | | remove |
| | | 233 | | { |
| | | 234 | | this._publish.BeforeEnumerationStart -= value; |
| | | 235 | | } |
| | | 236 | | } |
| | | 237 | | |
| | | 238 | | event GenericEventHandler<EnumerationStartedEventArgs<NATSPublishStatementInformation>> AsyncEnumerationObserva |
| | | 239 | | { |
| | | 240 | | add |
| | | 241 | | { |
| | | 242 | | this._publish.AfterEnumerationStart += value; |
| | | 243 | | } |
| | | 244 | | remove |
| | | 245 | | { |
| | | 246 | | this._publish.AfterEnumerationStart -= value; |
| | | 247 | | } |
| | | 248 | | } |
| | | 249 | | |
| | | 250 | | event GenericEventHandler<EnumerationStartedEventArgs> AsyncEnumerationObservation<NATSPublishCompleted>.AfterE |
| | | 251 | | { |
| | | 252 | | add |
| | | 253 | | { |
| | | 254 | | this._publish.AfterEnumerationStart += value; |
| | | 255 | | } |
| | | 256 | | remove |
| | | 257 | | { |
| | | 258 | | this._publish.AfterEnumerationStart -= value; |
| | | 259 | | } |
| | | 260 | | } |
| | | 261 | | |
| | | 262 | | event GenericEventHandler<EnumerationItemEventArgs<NATSPublishCompleted, NATSPublishStatementInformation>> Asyn |
| | | 263 | | { |
| | | 264 | | add |
| | | 265 | | { |
| | | 266 | | this._publish.AfterEnumerationItemEncountered += value; |
| | | 267 | | } |
| | | 268 | | remove |
| | | 269 | | { |
| | | 270 | | this._publish.AfterEnumerationItemEncountered -= value; |
| | | 271 | | } |
| | | 272 | | } |
| | | 273 | | |
| | | 274 | | event GenericEventHandler<EnumerationItemEventArgs<NATSPublishCompleted>> AsyncEnumerationObservation<NATSPubli |
| | | 275 | | { |
| | | 276 | | add |
| | | 277 | | { |
| | | 278 | | this._publish.AfterEnumerationItemEncountered += value; |
| | | 279 | | } |
| | | 280 | | remove |
| | | 281 | | { |
| | | 282 | | this._publish.AfterEnumerationItemEncountered -= value; |
| | | 283 | | } |
| | | 284 | | } |
| | | 285 | | |
| | | 286 | | event GenericEventHandler<EnumerationEndedEventArgs<NATSPublishStatementInformation>> AsyncEnumerationObservati |
| | | 287 | | { |
| | | 288 | | add |
| | | 289 | | { |
| | | 290 | | this._publish.BeforeEnumerationEnd += value; |
| | | 291 | | } |
| | | 292 | | remove |
| | | 293 | | { |
| | | 294 | | this._publish.BeforeEnumerationEnd -= value; |
| | | 295 | | } |
| | | 296 | | } |
| | | 297 | | |
| | | 298 | | event GenericEventHandler<EnumerationEndedEventArgs> AsyncEnumerationObservation<NATSPublishCompleted>.BeforeEn |
| | | 299 | | { |
| | | 300 | | add |
| | | 301 | | { |
| | | 302 | | this._publish.BeforeEnumerationEnd += value; |
| | | 303 | | } |
| | | 304 | | remove |
| | | 305 | | { |
| | | 306 | | this._publish.BeforeEnumerationEnd -= value; |
| | | 307 | | } |
| | | 308 | | } |
| | | 309 | | |
| | | 310 | | event GenericEventHandler<EnumerationEndedEventArgs<NATSPublishStatementInformation>> AsyncEnumerationObservati |
| | | 311 | | { |
| | | 312 | | add |
| | | 313 | | { |
| | | 314 | | this._publish.AfterEnumerationEnd += value; |
| | | 315 | | } |
| | | 316 | | remove |
| | | 317 | | { |
| | | 318 | | this._publish.AfterEnumerationEnd -= value; |
| | | 319 | | } |
| | | 320 | | } |
| | | 321 | | |
| | | 322 | | event GenericEventHandler<EnumerationEndedEventArgs> AsyncEnumerationObservation<NATSPublishCompleted>.AfterEnu |
| | | 323 | | { |
| | | 324 | | add |
| | | 325 | | { |
| | | 326 | | this._publish.AfterEnumerationEnd += value; |
| | | 327 | | } |
| | | 328 | | remove |
| | | 329 | | { |
| | | 330 | | this._publish.AfterEnumerationEnd -= value; |
| | | 331 | | } |
| | | 332 | | } |
| | | 333 | | |
| | | 334 | | public IAsyncEnumerable<NATSMessage> PrepareStatementForExecution( NATSSubscribeStatementInformation statement |
| | | 335 | | { |
| | | 336 | | return this._subscribe.PrepareStatementForExecution( statement ); |
| | | 337 | | } |
| | | 338 | | |
| | | 339 | | public IAsyncEnumerable<NATSPublishCompleted> PrepareStatementForExecution( NATSPublishStatementInformation sta |
| | | 340 | | { |
| | | 341 | | return this._publish.PrepareStatementForExecution( statement ); |
| | | 342 | | } |
| | | 343 | | |
| | | 344 | | public async Task<NATSMessage> RequestAsync( String subject, Byte[] data, Int32 offset, Int32 count ) |
| | | 345 | | { |
| | | 346 | | return await this._protocol.RequestAsync( subject, data, offset, count ); |
| | | 347 | | } |
| | | 348 | | |
| | | 349 | | public event GenericEventHandler<AfterSubscriptionSentArgs> AfterSubscriptionSent |
| | | 350 | | { |
| | | 351 | | add |
| | | 352 | | { |
| | | 353 | | this._protocol.AfterSubscriptionSent += value; |
| | | 354 | | } |
| | | 355 | | remove |
| | | 356 | | { |
| | | 357 | | this._protocol.AfterSubscriptionSent -= value; |
| | | 358 | | } |
| | | 359 | | } |
| | | 360 | | |
| | | 361 | | public event GenericEventHandler<AfterPublishSentArgs> AfterPublishSent |
| | | 362 | | { |
| | | 363 | | add |
| | | 364 | | { |
| | | 365 | | this._protocol.AfterPublishSent += value; |
| | | 366 | | } |
| | | 367 | | remove |
| | | 368 | | { |
| | | 369 | | this._protocol.AfterPublishSent -= value; |
| | | 370 | | } |
| | | 371 | | } |
| | | 372 | | |
| | | 373 | | // internal CancellationTokenSource UsageStarted() |
| | | 374 | | // { |
| | | 375 | | // var retVal = new CancellationTokenSource(); |
| | | 376 | | //#pragma warning disable 4014 |
| | | 377 | | // //this.RunReader( retVal.Token ); |
| | | 378 | | //#pragma warning restore 4014 |
| | | 379 | | // return retVal; |
| | | 380 | | // } |
| | | 381 | | |
| | | 382 | | //internal void UsageEnded( CancellationTokenSource cancellationTokenSource ) |
| | | 383 | | //{ |
| | | 384 | | // cancellationTokenSource.Cancel(); |
| | | 385 | | //} |
| | | 386 | | |
| | | 387 | | // private async Task RunReader( CancellationToken token ) |
| | | 388 | | // { |
| | | 389 | | // var socket = this._socket; |
| | | 390 | | // var seenIDs = new HashSet<Int64>(); |
| | | 391 | | // while ( !token.IsCancellationRequested ) |
| | | 392 | | // { |
| | | 393 | | // if ( socket.Available > 0 || socket.Poll( 1, SelectMode.SelectRead ) || socket.Available > 0 ) |
| | | 394 | | // { |
| | | 395 | | // await this._protocol.PerformRead( seenIDs ); |
| | | 396 | | // } |
| | | 397 | | // else |
| | | 398 | | // { |
| | | 399 | | // await |
| | | 400 | | //#if NET40 |
| | | 401 | | // TaskEx |
| | | 402 | | //#else |
| | | 403 | | // Task |
| | | 404 | | //#endif |
| | | 405 | | // .Delay( 50 ); |
| | | 406 | | |
| | | 407 | | // } |
| | | 408 | | // } |
| | | 409 | | // } |
| | | 410 | | |
| | | 411 | | } |
| | | 412 | | |
| | | 413 | | internal sealed class NATSSubscribeConnectionFunctionality : DefaultConnectionFunctionality<NATSSubscribeStatement |
| | | 414 | | { |
| | | 415 | | |
| | | 416 | | private readonly ClientProtocol _protocol; |
| | | 417 | | |
| | | 418 | | public NATSSubscribeConnectionFunctionality( |
| | | 419 | | NATSConnectionVendorFunctionalityImpl vendor, |
| | | 420 | | ClientProtocol protocol |
| | | 421 | | ) : base( vendor ) |
| | | 422 | | { |
| | | 423 | | this._protocol = ArgumentValidator.ValidateNotNull( nameof( protocol ), protocol ); |
| | | 424 | | } |
| | | 425 | | |
| | | 426 | | protected override IAsyncEnumerable<NATSMessage> CreateEnumerable( NATSSubscribeStatementInformation metadata ) |
| | | 427 | | { |
| | | 428 | | var protocol = this._protocol; |
| | | 429 | | var originalAutoUnsub = metadata.AutoUnsubscribeAfter; |
| | | 430 | | var hasAutoUnSub = originalAutoUnsub > 0; |
| | | 431 | | var subj = metadata.Subject; |
| | | 432 | | var queue = metadata.Queue; |
| | | 433 | | var dynamicUnsubscribe = metadata.DynamicUnsubscription; |
| | | 434 | | |
| | | 435 | | return AsyncEnumerationFactory.CreateStatefulWrappingEnumerable( () => |
| | | 436 | | { |
| | | 437 | | Queue<NATSMessageImpl> messageQueue = null; |
| | | 438 | | Int64 id = -1; |
| | | 439 | | var currentAutoUnsub = originalAutoUnsub; |
| | | 440 | | var dynamicallyUnsubscribed = false; |
| | | 441 | | return AsyncEnumerationFactory.CreateWrappingStartInfo( |
| | | 442 | | async () => |
| | | 443 | | { |
| | | 444 | | if ( messageQueue == null ) |
| | | 445 | | { |
| | | 446 | | (id, messageQueue) = await protocol.WriteSubscribe( subj, queue, currentAutoUnsub ); |
| | | 447 | | } |
| | | 448 | | return !dynamicallyUnsubscribed && ( !hasAutoUnSub || currentAutoUnsub > 0 ? await protocol.Perform |
| | | 449 | | }, |
| | | 450 | | ( out Boolean success ) => |
| | | 451 | | { |
| | | 452 | | success = ( !hasAutoUnSub || currentAutoUnsub > 0 ) && messageQueue.Count > 0; |
| | | 453 | | if ( hasAutoUnSub && success ) |
| | | 454 | | { |
| | | 455 | | --currentAutoUnsub; |
| | | 456 | | } |
| | | 457 | | |
| | | 458 | | var retVal = success ? messageQueue.Dequeue() : default; |
| | | 459 | | if ( success && ( dynamicUnsubscribe?.Invoke( retVal ) ?? false ) ) |
| | | 460 | | { |
| | | 461 | | success = false; |
| | | 462 | | dynamicallyUnsubscribed = true; |
| | | 463 | | retVal = default; |
| | | 464 | | } |
| | | 465 | | |
| | | 466 | | return retVal; |
| | | 467 | | }, |
| | | 468 | | () => protocol.EnumerationEnded( id, hasAutoUnSub, currentAutoUnsub ) |
| | | 469 | | ); |
| | | 470 | | |
| | | 471 | | }, |
| | | 472 | | AsyncEnumeration.Implementation.Provider.DefaultAsyncProvider.Instance |
| | | 473 | | ); |
| | | 474 | | } |
| | | 475 | | |
| | | 476 | | protected override NATSSubscribeStatementInformation GetInformationFromStatement( NATSSubscribeStatement statem |
| | | 477 | | { |
| | | 478 | | return (NATSSubscribeStatementInformation) statement?.NATSStatementInformation; |
| | | 479 | | } |
| | | 480 | | |
| | | 481 | | protected override void ValidateStatementOrThrow( NATSSubscribeStatementInformation statement ) |
| | | 482 | | { |
| | | 483 | | ArgumentValidator.ValidateNotNull( nameof( statement ), statement ); |
| | | 484 | | } |
| | | 485 | | |
| | | 486 | | } |
| | | 487 | | |
| | | 488 | | internal sealed class NATSPublishConnectionFunctionality : DefaultConnectionFunctionality<NATSPublishStatement, NA |
| | | 489 | | { |
| | | 490 | | private readonly ClientProtocol _protocol; |
| | | 491 | | |
| | | 492 | | public NATSPublishConnectionFunctionality( |
| | | 493 | | NATSConnectionVendorFunctionalityImpl vendor, |
| | | 494 | | ClientProtocol protocol |
| | | 495 | | ) : base( vendor ) |
| | | 496 | | { |
| | | 497 | | this._protocol = ArgumentValidator.ValidateNotNull( nameof( protocol ), protocol ); |
| | | 498 | | } |
| | | 499 | | |
| | | 500 | | |
| | | 501 | | |
| | | 502 | | protected override IAsyncEnumerable<NATSPublishCompleted> CreateEnumerable( NATSPublishStatementInformation met |
| | | 503 | | { |
| | | 504 | | const Int32 INITIAL = 0; |
| | | 505 | | const Int32 STARTED = 1; |
| | | 506 | | const Int32 PENDING_NEXT = 2; |
| | | 507 | | var protocol = this._protocol; |
| | | 508 | | var dpFactory = metadata.DataProducerFactory; |
| | | 509 | | |
| | | 510 | | return AsyncEnumerationFactory.CreateStatefulWrappingEnumerable( () => |
| | | 511 | | { |
| | | 512 | | var state = INITIAL; |
| | | 513 | | TDataProducer dp = null; |
| | | 514 | | return AsyncEnumerationFactory.CreateWrappingStartInfo( |
| | | 515 | | async () => |
| | | 516 | | { |
| | | 517 | | if ( state == INITIAL ) |
| | | 518 | | { |
| | | 519 | | dp = dpFactory?.Invoke(); |
| | | 520 | | } |
| | | 521 | | Interlocked.Exchange( ref state, STARTED ); |
| | | 522 | | var datas = dp == null ? default : await dp(); |
| | | 523 | | if ( datas != null ) |
| | | 524 | | { |
| | | 525 | | await protocol.WritePublish( datas ); |
| | | 526 | | } |
| | | 527 | | return datas != null; |
| | | 528 | | }, |
| | | 529 | | ( out Boolean success ) => |
| | | 530 | | { |
| | | 531 | | success = state == STARTED; |
| | | 532 | | if ( success ) |
| | | 533 | | { |
| | | 534 | | Interlocked.Exchange( ref state, PENDING_NEXT ); |
| | | 535 | | } |
| | | 536 | | return default( NATSPublishCompleted ); |
| | | 537 | | }, |
| | | 538 | | null |
| | | 539 | | ); |
| | | 540 | | }, |
| | | 541 | | AsyncEnumeration.Implementation.Provider.DefaultAsyncProvider.Instance |
| | | 542 | | ); |
| | | 543 | | } |
| | | 544 | | |
| | | 545 | | protected override NATSPublishStatementInformation GetInformationFromStatement( NATSPublishStatement statement |
| | | 546 | | { |
| | | 547 | | return statement.NATSStatementInformation; |
| | | 548 | | } |
| | | 549 | | |
| | | 550 | | protected override void ValidateStatementOrThrow( NATSPublishStatementInformation statement ) |
| | | 551 | | { |
| | | 552 | | ArgumentValidator.ValidateNotNull( nameof( statement ), statement ); |
| | | 553 | | } |
| | | 554 | | } |
| | | 555 | | |
| | | 556 | | internal sealed class NATSConnectionVendorFunctionalityImpl : NATSConnectionVendorFunctionality |
| | | 557 | | { |
| | 5 | 558 | | public static NATSConnectionVendorFunctionalityImpl Instance { get; } = new NATSConnectionVendorFunctionalityIm |
| | | 559 | | |
| | 1 | 560 | | private NATSConnectionVendorFunctionalityImpl() |
| | | 561 | | { |
| | | 562 | | |
| | 1 | 563 | | } |
| | | 564 | | |
| | | 565 | | |
| | | 566 | | NATSSubscribeStatement ConnectionVendorFunctionality<NATSSubscribeStatement, String>.CreateStatementBuilder( St |
| | | 567 | | { |
| | 2 | 568 | | var q = new Reference<String>(); |
| | 2 | 569 | | var a = new Reference<Int64>(); |
| | 2 | 570 | | var d = new Reference<Func<NATSMessage, Boolean>>(); |
| | 2 | 571 | | return new NATSSubscribeStatementImpl( |
| | 2 | 572 | | new NATSSubscribeStatementInformationImpl( subject, q, a, d ), |
| | 2 | 573 | | q, |
| | 2 | 574 | | a, |
| | 2 | 575 | | d |
| | 2 | 576 | | ); |
| | | 577 | | } |
| | | 578 | | |
| | | 579 | | NATSPublishStatement ConnectionVendorFunctionality<NATSPublishStatement, TDataProducerFactory>.CreateStatementB |
| | | 580 | | { |
| | 2 | 581 | | var dp = new Reference<TDataProducerFactory>() |
| | 2 | 582 | | { |
| | 2 | 583 | | Value = dataProducerFactory |
| | 2 | 584 | | }; |
| | | 585 | | |
| | 2 | 586 | | return new NATSPublishStatementImpl( |
| | 2 | 587 | | new NATSPublishStatementInformationImpl( dp ), |
| | 2 | 588 | | dp |
| | 2 | 589 | | ); |
| | | 590 | | } |
| | | 591 | | } |
| | | 592 | | } |
| | | 593 | | |
| | | 594 | | } |