Enum QueryError 

pub enum QueryError {
    UnknownQuery(String),
    Timeout,
    NotRunning(WorkflowId),
    Unknown(WorkflowId),
    ReplyDropped,
    HandlerFailed {
        message: String,
    },
    InvalidArguments {
        reason: 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.

InvalidArguments

The caller’s query arguments payload is not a well-formed JSON document.

Query arguments cross into workflow code as the JSON text the caller supplied. A payload that is not valid UTF-8 JSON can never reach a handler, so it is refused at the delivery boundary and attributed to the caller — never forwarded to become a misleading handler failure.

Fields

reason: String

Why the arguments payload could not be carried to the 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