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| 1 | +using System; |
| 2 | + |
| 3 | +namespace RabbitMQ.Client |
| 4 | +{ |
| 5 | + /// <summary> |
| 6 | + /// Custom logic for handling topology recovery exceptions that match the specified filters. |
| 7 | + /// </summary> |
| 8 | + public class TopologyRecoveryExceptionHandler |
| 9 | + { |
| 10 | + private static readonly Func<IRecordedExchange, Exception, bool> s_defaultExchangeExceptionCondition = (e, ex) => true; |
| 11 | + private static readonly Func<IRecordedQueue, Exception, bool> s_defaultQueueExceptionCondition = (q, ex) => true; |
| 12 | + private static readonly Func<IRecordedBinding, Exception, bool> s_defaultBindingExceptionCondition = (b, ex) => true; |
| 13 | + private static readonly Func<IRecordedConsumer, Exception, bool> s_defaultConsumerExceptionCondition = (c, ex) => true; |
| 14 | + |
| 15 | + private Func<IRecordedExchange, Exception, bool> _exchangeRecoveryExceptionCondition; |
| 16 | + private Func<IRecordedQueue, Exception, bool> _queueRecoveryExceptionCondition; |
| 17 | + private Func<IRecordedBinding, Exception, bool> _bindingRecoveryExceptionCondition; |
| 18 | + private Func<IRecordedConsumer, Exception, bool> _consumerRecoveryExceptionCondition; |
| 19 | + private Action<IRecordedExchange, Exception> _exchangeRecoveryExceptionHandler; |
| 20 | + private Action<IRecordedQueue, Exception> _queueRecoveryExceptionHandler; |
| 21 | + private Action<IRecordedBinding, Exception> _bindingRecoveryExceptionHandler; |
| 22 | + private Action<IRecordedConsumer, Exception> _consumerRecoveryExceptionHandler; |
| 23 | + |
| 24 | + /// <summary> |
| 25 | + /// Decides which exchange recovery exceptions the custom exception handler is applied to. |
| 26 | + /// Default condition applies the exception handler to all exchange recovery exceptions. |
| 27 | + /// </summary> |
| 28 | + public Func<IRecordedExchange, Exception, bool> ExchangeRecoveryExceptionCondition |
| 29 | + { |
| 30 | + get => _exchangeRecoveryExceptionCondition ?? s_defaultExchangeExceptionCondition; |
| 31 | + |
| 32 | + set |
| 33 | + { |
| 34 | + if (_exchangeRecoveryExceptionCondition != null) |
| 35 | + throw new InvalidOperationException($"Cannot modify {nameof(ExchangeRecoveryExceptionCondition)} after it has been initialized."); |
| 36 | + |
| 37 | + _exchangeRecoveryExceptionCondition = value ?? throw new ArgumentNullException(nameof(ExchangeRecoveryExceptionCondition)); |
| 38 | + } |
| 39 | + } |
| 40 | + |
| 41 | + /// <summary> |
| 42 | + /// Decides which queue recovery exceptions the custom exception handler is applied to. |
| 43 | + /// Default condition applies the exception handler to all queue recovery exceptions. |
| 44 | + /// </summary> |
| 45 | + public Func<IRecordedQueue, Exception, bool> QueueRecoveryExceptionCondition |
| 46 | + { |
| 47 | + get => _queueRecoveryExceptionCondition ?? s_defaultQueueExceptionCondition; |
| 48 | + |
| 49 | + set |
| 50 | + { |
| 51 | + if (_queueRecoveryExceptionCondition != null) |
| 52 | + throw new InvalidOperationException($"Cannot modify {nameof(QueueRecoveryExceptionCondition)} after it has been initialized."); |
| 53 | + |
| 54 | + _queueRecoveryExceptionCondition = value ?? throw new ArgumentNullException(nameof(QueueRecoveryExceptionCondition)); |
| 55 | + } |
| 56 | + } |
| 57 | + |
| 58 | + /// <summary> |
| 59 | + /// Decides which binding recovery exceptions the custom exception handler is applied to. |
| 60 | + /// Default condition applies the exception handler to all binding recovery exceptions. |
| 61 | + /// </summary> |
| 62 | + public Func<IRecordedBinding, Exception, bool> BindingRecoveryExceptionCondition |
| 63 | + { |
| 64 | + get => _bindingRecoveryExceptionCondition ?? s_defaultBindingExceptionCondition; |
| 65 | + |
| 66 | + set |
| 67 | + { |
| 68 | + if (_bindingRecoveryExceptionCondition != null) |
| 69 | + throw new InvalidOperationException($"Cannot modify {nameof(ExchangeRecoveryExceptionCondition)} after it has been initialized."); |
| 70 | + |
| 71 | + _bindingRecoveryExceptionCondition = value ?? throw new ArgumentNullException(nameof(ExchangeRecoveryExceptionCondition)); |
| 72 | + } |
| 73 | + } |
| 74 | + |
| 75 | + /// <summary> |
| 76 | + /// Decides which consumer recovery exceptions the custom exception handler is applied to. |
| 77 | + /// Default condition applies the exception handler to all consumer recovery exceptions. |
| 78 | + /// </summary> |
| 79 | + public Func<IRecordedConsumer, Exception, bool> ConsumerRecoveryExceptionCondition |
| 80 | + { |
| 81 | + get => _consumerRecoveryExceptionCondition ?? s_defaultConsumerExceptionCondition; |
| 82 | + |
| 83 | + set |
| 84 | + { |
| 85 | + if (_consumerRecoveryExceptionCondition != null) |
| 86 | + throw new InvalidOperationException($"Cannot modify {nameof(ConsumerRecoveryExceptionCondition)} after it has been initialized."); |
| 87 | + |
| 88 | + _consumerRecoveryExceptionCondition = value ?? throw new ArgumentNullException(nameof(ConsumerRecoveryExceptionCondition)); |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + /// <summary> |
| 93 | + /// Retries, or otherwise handles, an exception thrown when attempting to recover an exchange. |
| 94 | + /// </summary> |
| 95 | + public Action<IRecordedExchange, Exception> ExchangeRecoveryExceptionHandler |
| 96 | + { |
| 97 | + get => _exchangeRecoveryExceptionHandler; |
| 98 | + |
| 99 | + set |
| 100 | + { |
| 101 | + if (_exchangeRecoveryExceptionHandler != null) |
| 102 | + throw new InvalidOperationException($"Cannot modify {nameof(ExchangeRecoveryExceptionHandler)} after it has been initialized."); |
| 103 | + |
| 104 | + _exchangeRecoveryExceptionHandler = value ?? throw new ArgumentNullException(nameof(ExchangeRecoveryExceptionHandler)); |
| 105 | + } |
| 106 | + } |
| 107 | + |
| 108 | + /// <summary> |
| 109 | + /// Retries, or otherwise handles, an exception thrown when attempting to recover a queue. |
| 110 | + /// </summary> |
| 111 | + public Action<IRecordedQueue, Exception> QueueRecoveryExceptionHandler |
| 112 | + { |
| 113 | + get => _queueRecoveryExceptionHandler; |
| 114 | + |
| 115 | + set |
| 116 | + { |
| 117 | + if (_queueRecoveryExceptionHandler != null) |
| 118 | + throw new InvalidOperationException($"Cannot modify {nameof(QueueRecoveryExceptionHandler)} after it has been initialized."); |
| 119 | + |
| 120 | + _queueRecoveryExceptionHandler = value ?? throw new ArgumentNullException(nameof(QueueRecoveryExceptionHandler)); |
| 121 | + } |
| 122 | + } |
| 123 | + |
| 124 | + /// <summary> |
| 125 | + /// Retries, or otherwise handles, an exception thrown when attempting to recover a binding. |
| 126 | + /// </summary> |
| 127 | + public Action<IRecordedBinding, Exception> BindingRecoveryExceptionHandler |
| 128 | + { |
| 129 | + get => _bindingRecoveryExceptionHandler; |
| 130 | + |
| 131 | + set |
| 132 | + { |
| 133 | + if (_bindingRecoveryExceptionHandler != null) |
| 134 | + throw new InvalidOperationException($"Cannot modify {nameof(BindingRecoveryExceptionHandler)} after it has been initialized."); |
| 135 | + |
| 136 | + _bindingRecoveryExceptionHandler = value ?? throw new ArgumentNullException(nameof(BindingRecoveryExceptionHandler)); |
| 137 | + } |
| 138 | + } |
| 139 | + |
| 140 | + /// <summary> |
| 141 | + /// Retries, or otherwise handles, an exception thrown when attempting to recover a consumer. |
| 142 | + /// Is only called when the exception did not cause the consumer's channel to close. |
| 143 | + /// </summary> |
| 144 | + public Action<IRecordedConsumer, Exception> ConsumerRecoveryExceptionHandler |
| 145 | + { |
| 146 | + get => _consumerRecoveryExceptionHandler; |
| 147 | + |
| 148 | + set |
| 149 | + { |
| 150 | + if (_consumerRecoveryExceptionHandler != null) |
| 151 | + throw new InvalidOperationException($"Cannot modify {nameof(ConsumerRecoveryExceptionHandler)} after it has been initialized."); |
| 152 | + |
| 153 | + _consumerRecoveryExceptionHandler = value ?? throw new ArgumentNullException(nameof(ConsumerRecoveryExceptionHandler)); |
| 154 | + } |
| 155 | + } |
| 156 | + } |
| 157 | +} |
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