Enum MediatorBuildError 

#[non_exhaustive]
pub enum MediatorBuildError {
    DuplicateHandler {
        type_name: &'static str,
    },
}

Errors raised by MediatorBuilder::build when the requested configuration is inconsistent. Handler failures at dispatch time keep flowing through HexeractError.

Marked #[non_exhaustive] so that new variants can be added in minor versions without breaking downstream match arms.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

DuplicateHandler

A second handler was registered for a Command or Query that already had one. Commands and queries are single-handler by contract; notifications are not affected by this rule.

Fields

type_name: &'static str

Fully-qualified type name of the offending message.

Trait Implementations

impl Debug for MediatorBuildError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for MediatorBuildError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for MediatorBuildError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.