Enum EventStoreError 

pub enum EventStoreError {
    ConflictingExpectedVersions {
        stream_id: StreamId,
        first_version: StreamVersion,
        second_version: StreamVersion,
    },
    UndeclaredStream {
        stream_id: StreamId,
    },
    SerializationFailed {
        stream_id: StreamId,
        detail: String,
    },
    DeserializationFailed {
        stream_id: StreamId,
        detail: String,
    },
    StoreFailure {
        operation: Operation,
    },
    VersionConflict,
}

Error type returned by event store operations.

EventStoreError represents failures during read or append operations, covering serialization, deserialization, version conflicts, infrastructure failures, and stream declaration violations.

Variants

ConflictingExpectedVersions

Returned when a stream is assigned multiple different expected versions within the same write batch.

Fields

stream_id: StreamId

first_version: StreamVersion

second_version: StreamVersion

UndeclaredStream

Returned when append attempts are made against a stream that has not been registered with an expected version.

Fields

stream_id: StreamId

SerializationFailed

Returned when event serialization fails prior to persistence.

Fields

stream_id: StreamId

detail: String

DeserializationFailed

Returned when stored event payloads cannot be deserialized into the requested type.

Fields

stream_id: StreamId

detail: String

StoreFailure

Represents infrastructure failures surfaced by the backing store (e.g., connection drops).

Fields

operation: Operation

VersionConflict

Version conflict during optimistic concurrency control.

Returned when append_events detects that the expected version does not match the current stream version, indicating a concurrent modification occurred between read and write.

Trait Implementations

impl Debug for EventStoreError

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

Formats the value using the given formatter.

impl Display for EventStoreError

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

Formats the value using the given formatter.

impl Error for EventStoreError

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 PartialEq for EventStoreError

fn eq(&self, other: &EventStoreError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for EventStoreError