Enum BackendError 

pub enum BackendError {
    InitializationError(String),
    ProcessingError(String),
    ModelError(String),
    CommunicationError(String),
    InvalidInput(String),
    Protocol(ProtocolError),
}

Errors returned by crate::IpcBackend and crate::HybridFlowBackend.

These cover initialization, processing, model persistence, IPC communication, invalid caller input, and structured-message protocol rejection. Most variants carry a human-readable String. BackendError::Protocol carries a ProtocolError so a hybrid-flow receiver can reject an unexpected crate::IpcMessage variant without overloading a transport or validation failure.

Variants

InitializationError(String)

Backend failed to initialize (e.g. model load failure, ZMQ connect error).

ProcessingError(String)

Error during process_batch (e.g. shape mismatch, backend internal failure).

ModelError(String)

Model save/load or filesystem I/O error.

CommunicationError(String)

IPC / transport communication error (ZMQ send/recv, framing, timeout).

InvalidInput(String)

Caller supplied invalid input (e.g. empty batch where disallowed, bad config).

Protocol(ProtocolError)

A structured message was valid on the wire but not acceptable for this call.

Hybrid-flow receivers return this when an inbound crate::IpcMessage decodes and validates, then turns out to be a different variant than the method accepts. The frame is already consumed; it is not dropped silently and it is not retried.

Trait Implementations

impl Debug for BackendError

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

Formats the value using the given formatter.

impl Display for BackendError

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

Formats the value using the given formatter.

impl Error for BackendError

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<ProtocolError> for BackendError

fn from(source: ProtocolError) -> Self

Converts to this type from the input type.