Enum GraphFlowError 

#[non_exhaustive]
pub enum GraphFlowError {
    NodeExecutionError(BoxDynError),
    Backend(BoxDynError),
    MissingService(NodeIndex),
    Service(GraphServiceError),
    Codec(BoxDynError),
    Metadata(BoxDynError),
    DependenciesNotReady,
    MissingDependencyTaskId(NodeIndex),
    TaskResultNotFound(NodeIndex),
    DependencyTaskFailed(String),
    UnexpectedResponseType,
    InputCountMismatch {
        expected: usize,
        actual: usize,
    },
    EntryFanOutIncomplete,
    CyclicDAG(Cycle<NodeIndex>),
    MetadataError(GraphFlowContextError),
}

Errors that can occur during Graph workflow execution.

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.

NodeExecutionError(BoxDynError)

An error originating from the actual node execution.

Backend(BoxDynError)

An error originating from the backend.

MissingService(NodeIndex)

An error originating from the service.

Service(GraphServiceError)

An error originating from the service.

Codec(BoxDynError)

An error related to codec operations.

Metadata(BoxDynError)

An error related to metadata operations.

DependenciesNotReady

An error indicating that dependencies are not ready.

MissingDependencyTaskId(NodeIndex)

An error indicating a missing task ID for a dependency node.

TaskResultNotFound(NodeIndex)

An error indicating that a task result was not found for a node.

DependencyTaskFailed(String)

An error indicating that a dependency task has failed.

UnexpectedResponseType

An error indicating an unexpected response type during fan-in.

InputCountMismatch

An error indicating a mismatch in the number of inputs during fan-in.

Fields

expected: usize

The expected number of inputs.

actual: usize

The actual number of inputs received.

EntryFanOutIncomplete

An error indicating that entry fan-out is not completed.

CyclicDAG(Cycle<NodeIndex>)

Graph contains cycles.

MetadataError(GraphFlowContextError)

Metadata error

Trait Implementations

impl Debug for GraphFlowError

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

Formats the value using the given formatter.

impl Display for GraphFlowError

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

Formats the value using the given formatter.

impl Error for GraphFlowError

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<GraphFlowContextError> for GraphFlowError

fn from(source: GraphFlowContextError) -> Self

Converts to this type from the input type.

impl From<GraphServiceError> for GraphFlowError

fn from(source: GraphServiceError) -> Self

Converts to this type from the input type.