Trait Service

pub trait Service<B: Backend> {
    type Migration: Migration + 'static;

    // Required methods
    fn sid() -> u32;
    fn need_top_id() -> bool;
    fn migration() -> Self::Migration;
}

A service running on top of a Container.

A concrete service should implement this trait. Later, such a service can be instantiated with Container::open_service resp. Container::create_service.

Required Associated Types

type Migration: Migration + 'static

The migration assiciated with this service.

Required Methods

fn sid() -> u32

The service identifier.

This is a number that identifies the service, which must be greater than 0.

The sid is stored in the header of the container. When opening a service the stored sid must match with this sid, otherwise the open attempt is rejected.

fn need_top_id() -> bool

Returns true if the service requires a top-id.

If a top-id is required, a top-id is aquired and stored in the header of the container when creating a service-instance.

fn migration() -> Self::Migration

Returns the migration assiciated with this service.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors