Build Client Dependencies

Before creating publishers and subscribers, a small set of dependencies must be constructed.

These dependencies are shared across most ServiceBus.Core components.

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Required Components

The following components are required:

Component	Purpose
RabbitMQ Connection	Transport connectivity
Channel	Message operations
IDataFormatter	Serialization
Descriptor	Runtime configuration

graph TD

    Connection

    Channel

    Formatter

    Descriptor

    Publisher

    Subscriber

    Connection --> Channel

    Channel --> Publisher
    Channel --> Subscriber

    Formatter --> Publisher
    Formatter --> Subscriber

    Descriptor --> Publisher
    Descriptor --> Subscriber

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Construction Order

The recommended order is:

1. Create connection factory.
2. Create RabbitMQ connection.
3. Create channel.
4. Create formatter.
5. Create descriptors.
6. Create publisher or subscriber.

graph LR

    Factory --> Connection

    Connection --> Channel

    Channel --> Formatter

    Formatter --> Descriptor

    Descriptor --> Client

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Client Construction Philosophy

ServiceBus.Core intentionally separates:

• transport infrastructure;
• serialization;
• topology;
• messaging operations.

This makes the framework easier to test and maintain.

The following pages explain each dependency in detail.