Enum Error 

pub enum Error {
    Busy,
    NotFound(String),
    AlreadyExists(String),
    UnknownWorkflow(String),
    Step {
        name: String,
        failure: Failure,
    },
    Failed(Failure),
    Child {
        id: String,
        failure: Failure,
    },
    Cancelled(String),
    TimedOut,
    Terminated,
    Determinism(String),
    Rejected(String),
    Codec(String),
    Connection(String),
    Io(String),
    Closed,
}

Everything that can go wrong in Fusee, as seen by application code.

Every SDK has the same set, named by Error::code; each code has a page at Error::docs.

Variants

Busy

The shard’s queues are full. Retry later; nothing was recorded.

NotFound(String)

No run with this workflow ID is known (never started, or its retention ended).

AlreadyExists(String)

A workflow with this ID already exists and the start asked for a new run only. Carries the ID and what holds it.

UnknownWorkflow(String)

No code is registered for this workflow type (or version). Carries the message, which lists the types that are registered.

Step

A step failed after its last attempt, or with a failure that is not retried. Carries the step name and the step’s failure.

Fields

name: String

failure: Failure

Failed(Failure)

The workflow (or an update, or an object’s handler) failed.

Child

A child workflow failed. Carries its workflow ID and its failure.

Fields

id: String

failure: Failure

Cancelled(String)

Cancellation reached this operation. Carries the reason.

TimedOut

A timeout elapsed (step, wait, or the workflow’s deadline).

Terminated

The run was terminated.

Determinism(String)

The code made different journal operations than its journal records.

Rejected(String)

A request was refused and nothing was recorded: an update’s validator refused it, a completion token is stale, an argument is invalid. Carries the reason.

Codec(String)

A value could not be serialized or deserialized.

Connection(String)

No connection to a Fusee server, or it was lost.

Io(String)

A disk or network failure. After a failed flush the shard stops.

Closed

The engine is closed.

Implementations

impl Error

pub fn code(&self) -> &'static str

The error’s code, the same in every SDK.

pub fn docs(&self) -> String

A link to the page for this error’s code.

pub fn failed(message: impl Into<String>) -> Self

An error with a failure to wrap: a workflow’s failure from a message.

pub fn failure(&self) -> Option<&Failure>

The failure this error carries, if it carries one.

pub fn is_retryable(&self) -> bool

Whether a step that returned this error may be retried.

pub fn to_failure(&self) -> Failure

The error as a recorded failure. Fusee’s own errors record their code as the type, so every SDK reads them back as the same error.

pub fn from_failure(f: Failure) -> Self

Reads a recorded failure back: one of Fusee’s own errors when its type is one of their codes, otherwise a workflow failure.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<DeterminismError> for Error

fn from(e: DeterminismError) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(e: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(e: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Failure

fn from(e: Error) -> Self

Converts to this type from the input type.

impl From<Failure> for Error

fn from(f: Failure) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Error

impl StructuralPartialEq for Error