| | 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 CBAM.Abstractions; |
| | 20 | | using CBAM.NATS; |
| | 21 | | using System; |
| | 22 | | using System.Collections.Generic; |
| | 23 | | using System.Linq; |
| | 24 | | using System.Threading; |
| | 25 | | using System.Threading.Tasks; |
| | 26 | | using UtilPack; |
| | 27 | | using TDataProducerResult = System.Threading.Tasks.ValueTask<System.Collections.Generic.IEnumerable<CBAM.NATS.NATSPublis |
| | 28 | |
|
| | 29 | | namespace CBAM.NATS |
| | 30 | | { |
| | 31 | | using TDataProducerFactory = Func<Func<TDataProducerResult>>; |
| | 32 | |
|
| | 33 | | public interface NATSConnection : |
| | 34 | | Connection<NATSSubscribeStatement, NATSSubscribeStatementInformation, String, NATSMessage, NATSConnectionVendorFun |
| | 35 | | Connection<NATSPublishStatement, NATSPublishStatementInformation, TDataProducerFactory, NATSPublishCompleted, NATS |
| | 36 | | NATSConnectionObservability |
| | 37 | | { |
| | 38 | | Task<NATSMessage> RequestAsync( String subject, Byte[] data, Int32 offset, Int32 count ); |
| | 39 | | } |
| | 40 | |
|
| | 41 | | public interface NATSConnectionVendorFunctionality : |
| | 42 | | ConnectionVendorFunctionality<NATSSubscribeStatement, String>, |
| | 43 | | ConnectionVendorFunctionality<NATSPublishStatement, TDataProducerFactory> |
| | 44 | | { |
| | 45 | |
|
| | 46 | | } |
| | 47 | |
|
| | 48 | | // TODO this interface might not be required after all - it might encourage 'bad' behaviour (i.e. the exact moment wh |
| | 49 | | public interface NATSConnectionObservability |
| | 50 | | { |
| | 51 | | event GenericEventHandler<AfterSubscriptionSentArgs> AfterSubscriptionSent; |
| | 52 | |
|
| | 53 | | event GenericEventHandler<AfterPublishSentArgs> AfterPublishSent; |
| | 54 | | } |
| | 55 | |
|
| | 56 | | public sealed class AfterSubscriptionSentArgs |
| | 57 | | { |
| 0 | 58 | | public AfterSubscriptionSentArgs( |
| 0 | 59 | | String subject, |
| 0 | 60 | | String queue, |
| 0 | 61 | | Int64? autoUnsubscribeAfter |
| 0 | 62 | | ) |
| | 63 | | { |
| 0 | 64 | | this.Subject = ArgumentValidator.ValidateNotEmpty( nameof( subject ), subject ); |
| 0 | 65 | | this.Queue = queue; |
| 0 | 66 | | this.AutoUnsubscribeAfter = autoUnsubscribeAfter; |
| 0 | 67 | | } |
| | 68 | |
|
| 0 | 69 | | public String Subject { get; } |
| | 70 | |
|
| 0 | 71 | | public String Queue { get; } |
| | 72 | |
|
| 0 | 73 | | public Int64? AutoUnsubscribeAfter { get; } |
| | 74 | | } |
| | 75 | |
|
| | 76 | | public sealed class AfterPublishSentArgs |
| | 77 | | { |
| | 78 | | public AfterPublishSentArgs( |
| | 79 | | String subject, |
| | 80 | | String replyTo |
| | 81 | | ) |
| | 82 | | { |
| | 83 | | this.Subject = ArgumentValidator.ValidateNotEmpty( nameof( subject ), subject ); |
| | 84 | | this.ReplyTo = replyTo; |
| | 85 | | } |
| | 86 | |
|
| | 87 | | public String Subject { get; } |
| | 88 | |
|
| | 89 | | public String ReplyTo { get; } |
| | 90 | | } |
| | 91 | | } |
| | 92 | |
|
| | 93 | | public static partial class E_CBAM |
| | 94 | | { |
| | 95 | | public static NATSSubscribeStatement CreateSubscribeStatementBuilder( this NATSConnectionVendorFunctionality vendorFu |
| | 96 | | { |
| | 97 | | return vendorFunctionality.CreateStatementBuilder( subject ); |
| | 98 | | } |
| | 99 | |
|
| | 100 | | public static NATSPublishStatement CreatePublishStatementBuilder( this NATSConnectionVendorFunctionality vendorFuncti |
| | 101 | | { |
| | 102 | | return vendorFunctionality.CreateStatementBuilder( dataProducer ); |
| | 103 | | } |
| | 104 | |
|
| | 105 | | public static NATSSubscribeStatement CreateSubscribeStatementBuilder( this NATSConnection connection, String subject |
| | 106 | | { |
| | 107 | | return ( (Connection<NATSSubscribeStatement, NATSSubscribeStatementInformation, String, NATSMessage, NATSConnectio |
| | 108 | | } |
| | 109 | |
|
| | 110 | | public static IAsyncEnumerable<NATSMessage> SubscribeAsync( this NATSConnection connection, String subject, Int64 aut |
| | 111 | | { |
| | 112 | | var stmt = connection.CreateSubscribeStatementBuilder( subject ); |
| | 113 | | if ( !String.IsNullOrEmpty( queue ) ) |
| | 114 | | { |
| | 115 | | stmt.Queue = queue; |
| | 116 | | } |
| | 117 | | if ( autoUnsubscribeAfter > 0 ) |
| | 118 | | { |
| | 119 | | stmt.AutoUnsubscribeAfter = autoUnsubscribeAfter; |
| | 120 | | } |
| | 121 | |
|
| | 122 | | return connection.PrepareStatementForExecution( stmt ); |
| | 123 | | } |
| | 124 | |
|
| | 125 | | public static NATSPublishStatement CreatePublishStatementBuilder( this NATSConnection connection, Func<Func<TDataProd |
| | 126 | | { |
| | 127 | | return ( (Connection<NATSPublishStatement, NATSPublishStatementInformation, Func<Func<TDataProducerResult>>, NATSP |
| | 128 | | } |
| | 129 | |
|
| | 130 | | public static Task<NATSMessage> RequestAsync( this NATSConnection connection, String subject, Byte[] data ) |
| | 131 | | { |
| | 132 | | return connection.RequestAsync( subject, data, 0, data?.Length ?? 0 ); |
| | 133 | | } |
| | 134 | |
|
| | 135 | |
|
| | 136 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithStaticDataProducerForWholeArray( this NATSConnection |
| | 137 | | { |
| | 138 | | return connection.PublishWithStaticDataProducer( subject, array, 0, array?.Length ?? 0, replySubject, repeatCount, |
| | 139 | | } |
| | 140 | |
|
| | 141 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithStaticDataProducer( this NATSConnection connection, S |
| | 142 | | { |
| | 143 | | var chunk = Enumerable.Repeat( new NATSPublishData( subject, array, offset, count, replySubject ), chunkCount ); |
| | 144 | | return connection.PrepareStatementForExecution( connection.CreatePublishStatementBuilder( () => |
| | 145 | | { |
| | 146 | | var remaining = repeatCount; |
| | 147 | | return () => |
| | 148 | | { |
| | 149 | | if ( remaining > 0 ) |
| | 150 | | { |
| | 151 | | var original = remaining; |
| | 152 | | remaining -= chunkCount; |
| | 153 | | return new TDataProducerResult( remaining >= 0 ? chunk : chunk.Take( (Int32) original ) ); |
| | 154 | | } |
| | 155 | | else |
| | 156 | | { |
| | 157 | | return default; |
| | 158 | | } |
| | 159 | | }; |
| | 160 | | } ) ); |
| | 161 | | } |
| | 162 | |
|
| | 163 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithDynamicSynchronousDataProducer( this NATSConnection c |
| | 164 | | { |
| | 165 | | var hasMax = repeatCount >= 0; |
| | 166 | | return connection.PrepareStatementForExecution( connection.CreatePublishStatementBuilder( () => |
| | 167 | | { |
| | 168 | | var remaining = repeatCount; |
| | 169 | | return () => |
| | 170 | | { |
| | 171 | | return !hasMax || Interlocked.Decrement( ref remaining ) >= 0 ? new TDataProducerResult( producer() ) : defa |
| | 172 | | }; |
| | 173 | | } ) ); |
| | 174 | | } |
| | 175 | |
|
| | 176 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithDynamicAsynchronousDataProducer( this NATSConnection |
| | 177 | | { |
| | 178 | | var hasMax = repeatCount >= 0; |
| | 179 | | return connection.PrepareStatementForExecution( connection.CreatePublishStatementBuilder( () => |
| | 180 | | { |
| | 181 | | var remaining = repeatCount; |
| | 182 | | return async () => |
| | 183 | | { |
| | 184 | | return !hasMax || Interlocked.Decrement( ref remaining ) >= 0 ? await producer() : default; |
| | 185 | | }; |
| | 186 | | } ) ); |
| | 187 | | } |
| | 188 | |
|
| | 189 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithDynamicSynchronousDataProducer( this NATSConnection c |
| | 190 | | { |
| | 191 | | var hasMax = repeatCount >= 0; |
| | 192 | | return connection.PrepareStatementForExecution( connection.CreatePublishStatementBuilder( () => |
| | 193 | | { |
| | 194 | | var remaining = repeatCount; |
| | 195 | | return () => |
| | 196 | | { |
| | 197 | | return !hasMax || Interlocked.Decrement( ref remaining ) >= 0 ? new TDataProducerResult( producer().Singleto |
| | 198 | | }; |
| | 199 | | } ) ); |
| | 200 | | } |
| | 201 | |
|
| | 202 | | public static IAsyncEnumerable<NATSPublishCompleted> PublishWithDynamicAsynchronousDataProducer( this NATSConnection |
| | 203 | | { |
| | 204 | | var hasMax = repeatCount >= 0; |
| | 205 | | return connection.PrepareStatementForExecution( connection.CreatePublishStatementBuilder( () => |
| | 206 | | { |
| | 207 | | var remaining = repeatCount; |
| | 208 | | return async () => |
| | 209 | | { |
| | 210 | | return !hasMax || Interlocked.Decrement( ref remaining ) >= 0 ? ( await producer() ).Singleton() : default; |
| | 211 | | }; |
| | 212 | | } ) ); |
| | 213 | | } |
| | 214 | |
|
| | 215 | | } |