# HrynCo.RabbitMq

RabbitMQ publisher and consumer base for HrynCo applications.

## Contents

- `RabbitMqSettings` — connection settings record (host, port, user, password, virtual host)
- `IRabbitMqPublisher` / `RabbitMqPublisher` — publishes JSON-serialized messages to a named queue
- `RabbitMqConsumerBase<TMessage, TMessageData>` — background service base with connection management, manual ACK/NACK, retry, permanent-validation rejection, and backward-compatible context-aware handling
- `RabbitMqMessageContext` — neutral AMQP delivery metadata (`MessageId`, type, correlation, routing, headers, and redelivery state)
- `IRabbitMqMessage<TMessageData>` — message contract interface
- `CorrelationContext` — correlation ID carrier

## Packaging

This package is intended for reuse through NuGet. The test project is excluded from packing.

## Consumer extension points

Existing consumers can keep overriding `HandleMessageAsync(message, cancellationToken)`.
Consumers that need AMQP metadata can instead override
`HandleMessageAsync(message, context, cancellationToken)`. The base class retains
ownership of acknowledgements and retries.

Override `TryValidateMessage(...)` for application-specific permanent validation.
Returning `false` nacks the delivery without requeue before retry processing begins.
Keep validation errors free of credentials and sensitive payload values.