Enum Error 

#[non_exhaustive]
pub enum Error {
    Transport(String),
    TokenRefresh(TokenCacheError),
    InvalidPathPrefix {
        prefix: String,
        reason: String,
    },
    Rejected {
        code: Code,
        message: String,
    },
    ServerError {
        code: Code,
        message: String,
    },
    ProtoMismatch(String),
}

All errors returned by crate::PcsExternalClient methods.

The three Grpc* variants mirror PasFailure semantics — Rejected means the call reached PCS and was turned down at the application layer (don’t retry as-is), ServerError is a 5xx-class state (retry-eligible), Transport means the call never reached PCS.

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.

Transport(String)

Connection, TLS, or network-level failure.

TokenRefresh(TokenCacheError)

Bearer token acquisition failed before the gRPC call could be made.

InvalidPathPrefix

The configured path prefix is malformed — caught at build time.

Fields

prefix: String

reason: String

Rejected

PCS returned a non-OK gRPC status at the application layer (InvalidArgument, NotFound, PermissionDenied, Unauthenticated, ResourceExhausted, FailedPrecondition, AlreadyExists, OutOfRange, Aborted, Cancelled).

Caller’s input, auth, or state is bad — do not retry as-is.

Fields

code: Code

message: String

ServerError

PCS returned a 5xx-class status (Internal, Unknown, DataLoss, Unimplemented, DeadlineExceeded). Retry-eligible.

Fields

code: Code

message: String

ProtoMismatch(String)

A required proto field was absent or could not be mapped to a domain type.

Trait Implementations

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, __formatter: &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<TokenCacheError> for Error

fn from(source: TokenCacheError) -> Self

Converts to this type from the input type.