Enum ProjectionError 

pub enum ProjectionError {
    NotFound(ProjectionKey),
    Io(Error),
    InvalidKey(String),
    Serialize(String),
}

All ways a ProjectionAdapter operation can fail.

Variants

NotFound(ProjectionKey)

No value exists for the given key — either project() could not resolve key against the supplied ctx data, or fetch() found no materialized projection for it.

Io(Error)

A filesystem operation (materialize write / read-back) failed.

InvalidKey(String)

key is structurally invalid for this adapter (e.g. an empty task_id).

Serialize(String)

Serializing the projected value to its on-disk/on-wire form, or deserializing it back, failed.

Trait Implementations

impl Debug for ProjectionError

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

Formats the value using the given formatter.

impl Display for ProjectionError

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

Formats the value using the given formatter.

impl Error for ProjectionError

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.

impl From<Error> for ProjectionError

fn from(source: Error) -> Self

Converts to this type from the input type.