Enum EventBusError 

#[non_exhaustive]
pub enum EventBusError {
    Internal(String),
    Validation(String),
    Serialization(String),
    InvalidTransition {
        from: String,
        to: String,
    },
    Connection(String),
    Timeout(String),
    Source {
        context: String,
        source: Box<dyn Error + Send + Sync + 'static>,
    },
}

Errors returned by the event bus.

The enum is marked #[non_exhaustive] so new variants can be added in a non-breaking way; external crates must include a _ => ... arm when matching exhaustively.

Prefer EventBusError::source when wrapping an underlying error from a backend or codec — it preserves the causal chain via std::error::Error::source, allowing tracing/observability stacks to render the full chain without losing typed information to stringification.

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.

Internal(String)

Validation(String)

Serialization(String)

InvalidTransition

Fields

from: String

to: String

Connection(String)

Timeout(String)

Source

An underlying error from a backend, codec, or dependency, with its source chain preserved. Construct via EventBusError::source.

Fields

context: String

source: Box<dyn Error + Send + Sync + 'static>

Implementations

impl EventBusError

pub fn source<E>(context: impl Into<String>, err: E) -> Self

where E: Error + Send + Sync + 'static,

Wrap an underlying error with a human-readable context string while preserving the source chain for error.source() traversal.

Example

use eventbus_core::EventBusError;

fn parse_int(s: &str) -> Result<u32, EventBusError> {
    s.parse::<u32>()
        .map_err(|e| EventBusError::source("parsing retry attempt", e))
}

Trait Implementations

impl Debug for EventBusError

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

Formats the value using the given formatter.

impl Display for EventBusError

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

Formats the value using the given formatter.

impl Error for EventBusError

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.