53 lines
2.7 KiB
C#
53 lines
2.7 KiB
C#
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using System;
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namespace Tapeti.Annotations
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{
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/// <inheritdoc />
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/// <summary>
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/// Can be attached to a message class to override or extend the generated routing key.
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/// One of the intended scenarios is for versioning messages, where you want to add for example a
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/// ".v2" postfix but keep the class name itself the same (in a different namespace of course).
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/// </summary>
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/// <remarks>
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/// The implementation of IRoutingKeyStrategy must explicitly add support for this attribute for it to have effect.
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/// The default implementation (TypeNameRoutingKeyStrategy) does, of course. Custom implementations can use
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/// the Tapeti.Helpers.RoutingKeyHelper class to add support and keep up-to-date automatically.
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///
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/// When using EnableDeclareDurableQueues to automatically generate the queue bindings, both the sender and receiver must
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/// use a Tapeti version >= 2.5 to support this attribute or the binding will differ from the sent routing key.
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///
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/// The routing keys are no longer used by Tapeti once the message is in the queue, the message handler
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/// is instead based on the full message class name (thus including namespace), so if the binding is generated in any
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/// other way this remark does not apply and prior versions of Tapeti are compatible.
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/// </remarks>
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[AttributeUsage(AttributeTargets.Class)]
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public class RoutingKeyAttribute : Attribute
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{
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/// <summary>
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/// If specified, the routing key strategy is skipped altogether and this value is used instead.
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/// </summary>
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/// <remarks>
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/// The Prefix and Postfix properties will not have any effect if the Full property is specified.
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/// </remarks>
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public string Full { get; set; }
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/// <summary>
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/// If specified, the value generated by the default routing key strategy is prefixed with this value.
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/// No dot will be added after this prefix, if you want to include it add it as part of the value.
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/// </summary>
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/// <remarks>
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/// This property will not have any effect if the Full property is specified. Can be used in combination with Postfix.
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/// </remarks>
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public string Prefix { get; set; }
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/// <summary>
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/// If specified, the value generated by the default routing key strategy is postfixed with this value.
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/// No dot will be added before this postfix, if you want to include it add it as part of the value.
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/// </summary>
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/// <remarks>
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/// This property will not have any effect if the Full property is specified. Can be used in combination with Prefix.
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/// </remarks>
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public string Postfix { get; set; }
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}
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}
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