Module layer
Expand description
Layer type and utilities.
Layers are the abstraction of middleware in Rama.
Direct copy of tower-layer.
Modules§
- abort
- Middleware that allows a user to cancel an operation using a controller.
- add_
extension - Middleware that clones a value into an incoming input’s or an output’s extensions
- consume_
err - count_
input - Input counting middleware.
- get_
extension - Middleware that gets called with either a shared reference or owned
Arcto the given type if it is available in the current input/output extensions. - limit
- A middleware that limits the number of in-flight inputs.
- timeout
- Middleware that applies a timeout to inputs.
Structs§
- Abortable
- Applies the option to abort an inner service.
- Abortable
Layer - Applies the option to abort an inner service.
- AddInput
Extension - Middleware for adding some shareable value to incoming input’s extensions.
- AddInput
Extension Layer Layerfor adding some shareable value to incoming input’s extensions.- AddOutput
Extension - Middleware for adding some shareable value to an output’s extensions.
- AddOutput
Extension Layer Layerfor adding some shareable value to an output’s extensions.- ArcLayer
LayerforArcing acrate::Service.- Consume
Err - Consumes this service’s error value and returns
Infallible. - Consume
ErrLayer - A
Layerthat producesConsumeErrservices. - Count
Input - Service that counts total and concurrent inputs and exposes a tracker via extensions.
- Count
Input Layer - A
Layerthat producesCountInputservices. - GetInput
Extension Owned - Middleware for retrieving an owned
Arcvalue from input extensions. - GetInput
Extension Owned Layer Layerfor retrieving an ownedArcvalue from input extensions.- GetInput
Extension Ref - Middleware for retrieving a shared reference from input extensions.
- GetInput
Extension RefLayer Layerfor retrieving a shared reference from input extensions.- GetOutput
Extension Owned - Middleware for retrieving an owned
Arcvalue from output extensions. - GetOutput
Extension Owned Layer Layerfor retrieving an ownedArcvalue from output extensions.- GetOutput
Extension Ref - Middleware for retrieving a shared reference from output extensions.
- GetOutput
Extension RefLayer Layerfor retrieving a shared reference from output extensions.- Graceful
IoLayer - A
Layerthat turns I/O input intoGracefulIoand injectsCancelIo. - Graceful
IoService - A
Servicethat wraps I/O input withGracefulIoand injects aCancelIoextension. - Hijack
Layer - Middleware to hijack an inputs to a
Servicewhich match using aMatcher. - Hijack
Service - Middleware to hijack inputs to a
Servicewhich match using aMatcher. - Layer
Error Fn - A
MakeLayerErrorimplementation that returns a new error value every time. - Layer
Error Static - A
MakeLayerErrorimplementation that always returns clone of the same error value. - LayerFn
- A
Layerimplemented by a closure. See the docs forlayer_fnfor more details. - Limit
- Limit inputs based on a
Policy. - Limit
Layer - Limit inputs based on a
Policy. - MapErr
- Maps this service’s error value to a different value.
- MapErr
Layer - A
Layerthat producesMapErrservices. - MapInput
- Composes a function in front of the service.
- MapInput
Layer - A
Layerthat producesMapInputservices. - MapOutput
- Maps this service’s output value to a different value.
- MapOutput
Layer - A
Layerthat produces aMapOutputservice. - MapResult
- Maps this service’s result type (
Result<Self::Response, Self::Error>) to a different value, regardless of whether the future succeeds or fails. - MapResult
Layer - A
Layerthat produces aMapResultservice. - Maybe
Layered Service MaybeLayeredServiceisServicewhich is created by using anOption<Layer>- Timeout
- Applies a timeout to inputs.
- Timeout
Layer - Applies a timeout to inputs via the supplied inner service.
- Trace
Err - Service which traces the error using [
tracing], of the innerService. - Trace
ErrLayer - A
Layerthat producesTraceErrservices.
Traits§
- Layer
- A layer that produces a Layered service (middleware(inner service)).
- Make
Layer Error - Utility error trait to allow Rama layers
to return a default error as well as a user-defined one,
being it a
Clone-able type or aFnreturning an error type.