Enum NatsError 

#[non_exhaustive]
pub enum NatsError {
    Connect(Box<dyn StdError + Send + Sync>),
    Publish(Box<dyn StdError + Send + Sync>),
    Subscribe(Box<dyn StdError + Send + Sync>),
    JetStream(Box<dyn StdError + Send + Sync>),
    Shutdown(Box<dyn StdError + Send + Sync>),
    RequestTimeout,
    Closed {
        subject: String,
    },
    InvalidOptions(String),
}

Errors surfaced by the NATS broker implementation.

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.

Connect(Box<dyn StdError + Send + Sync>)

Failed to establish or use the underlying async-nats connection.

Publish(Box<dyn StdError + Send + Sync>)

Failed to publish a message to the broker.

Subscribe(Box<dyn StdError + Send + Sync>)

Failed to subscribe to the requested subject.

JetStream(Box<dyn StdError + Send + Sync>)

JetStream-specific operation failed (consumer creation, publish acknowledgement, ack).

Shutdown(Box<dyn StdError + Send + Sync>)

Draining the connection during shutdown failed.

RequestTimeout

A request / reply operation timed out before a reply was received.

Closed

A publisher aliasing the connection was used after the broker shut down.

The lifecycle ladder makes misuse through the owner’s handle a compile error: ConnectedBroker::shutdown consumes the connected broker. Publishers paired off it earlier keep aliasing the closed connection, so their operations report this instead of silently succeeding against a dead connection.

Fields

subject: String

The subject the closed publisher was asked to reach.

InvalidOptions(String)

The supplied crate::SubscribeOptions combine fields in a way the broker cannot honour (for example durable(_) without jetstream(_), or queue_group(_) together with jetstream(_)).

Trait Implementations

impl Debug for NatsError

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

Formats the value using the given formatter.

impl Display for NatsError

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

Formats the value using the given formatter.

impl Error for NatsError

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.