Struct CapabilityCheckLayer

pub struct CapabilityCheckLayer;

Add an extra capability check layer for every operation

Similar to CorrectnessChecker, Before performing any operations, this layer will first verify its arguments against the capability of the underlying service. If the arguments is not supported, an error will be returned directly.

Notes

There are two main differences between this checker with the CorrectnessChecker:

1. This checker provides additional checks for capabilities like write_with_content_type and list_with_versions, among others. These capabilities do not affect data integrity, even if the underlying storage services do not support them.

2. OpenDAL doesn’t apply this checker by default. Users can enable this layer if they want to enforce stricter requirements.

examples

use opendal::layers::CapabilityCheckLayer;
let _ = Operator::new(services::Memory::default())?
    .layer(CapabilityCheckLayer)
    .finish();
Ok(())

Trait Implementations

impl Default for CapabilityCheckLayer

fn default() -> CapabilityCheckLayer

Returns the “default value” for a type.

impl<A> Layer<A> for CapabilityCheckLayer

where A: Access,

type LayeredAccess = CapabilityAccessor<A>

The layered accessor that returned by this layer.

fn layer(&self, inner: A) -> <CapabilityCheckLayer as Layer<A>>::LayeredAccess

Intercept the operations on the underlying storage.