Enum QueryError 

pub enum QueryError {
    UnknownQuery(String),
    Timeout,
    NotRunning(WorkflowId),
    Unknown(WorkflowId),
    ReplyDropped,
    HandlerFailed {
        message: String,
    },
    Engine(EngineSeamError),
}

Typed failures surfaced by live workflow query dispatch.

Variants

UnknownQuery(String)

The resident workflow has no registered handler for the requested query name.

Timeout

No query reply arrived before the engine-configured timeout elapsed.

NotRunning(WorkflowId)

The workflow cannot answer a live query because it is not currently running.

Unknown(WorkflowId)

The engine does not know the requested workflow.

ReplyDropped

The workflow query reply channel closed before a handler response was sent.

HandlerFailed

The workflow’s query handler ran and reported an application-level failure.

Fields

message: String

Failure reason reported by the workflow’s query handler.

Engine(EngineSeamError)

The engine seam failed while resolving or delivering the query.

Trait Implementations

impl Clone for QueryError

fn clone(&self) -> QueryError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QueryError

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

Formats the value using the given formatter.

impl Display for QueryError

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

Formats the value using the given formatter.

impl Eq for QueryError

impl Error for QueryError

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<EngineSeamError> for QueryError

fn from(source: EngineSeamError) -> Self

Converts to this type from the input type.

impl From<QueryError> for EngineError

fn from(source: QueryError) -> Self

Converts to this type from the input type.

impl PartialEq for QueryError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QueryError