Module internals 

The internal implementation details of OpenDAL.

This guide explains the extension boundaries used to implement OpenDAL storage services and layers. Application code should use the public Operator API; the raw APIs described here can change between minor releases.

OpenDAL keeps service implementations typed until it composes them into an operator:

Builder -> Service -> ServiceDyn -> Servicer -> Layer stack -> Operator
             ^                          |
             +------ type erasure ------+

• A Service implements storage operations and reports the capabilities it provides.
• ServiceDyn is the object-safe boundary that erases a typed service and its operation bodies.
• A Servicer is the shared, type-erased service handle stored by operators and layers.
• A Layer wraps the service stack, the operation context, or both.

Continue with implementing a service or implementing a layer.

Modules

accessor

Implementing a service.

layer

Implementing a layer.