Request Flow

This page describes how requests travel from a client application to an ASP.NET Core endpoint.

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High-Level Flow

sequenceDiagram

    participant Client

    participant Publisher

    participant RabbitMQ

    participant Subscriber

    participant ASPNET

    Client->>Publisher: Request

    Publisher->>RabbitMQ: Publish Request

    RabbitMQ->>Subscriber: Deliver Request

    Subscriber->>ASPNET: Execute Request

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Step 1 - Client Creates Request

The application creates a request object.

public sealed record CalculatePriceRequest(
    Guid ProductId,
    int Quantity);

The request is then passed to IAsyncRestPublisher.

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Step 2 - Request Serialization

The request is serialized using IDataFormatter.

graph LR

    Request --> IDataFormatter

    IDataFormatter --> Payload

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Step 3 - Request Publication

The serialized payload is published through RabbitMQ.

graph LR

    Publisher --> RabbitMQ

At this stage the transport layer behaves exactly like standard messaging.

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Step 4 - Request Consumption

RestHostSubscriberBound receives the request.

graph LR

    RabbitMQ --> RestHostSubscriberBound

The payload is deserialized and transformed into an ASP.NET Core execution context.

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Step 5 - ASP.NET Core Execution

The ASP.NET Core pipeline processes the request.

graph LR

    Middleware

    Routing

    Controller

    Middleware --> Routing

    Routing --> Controller

The framework reuses the standard ASP.NET Core infrastructure.

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Result

At the end of the request flow, ASP.NET Core produces a response object which is then returned through RabbitMQ.