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// copied from https://github.com/grpc/grpc/blob/master/include/grpc/impl/codegen/status.h
/// gRPC status constants.
#[allow(dead_code)]
#[derive(Copy, Clone, Debug)]
pub enum GrpcStatus {
/* Not an error; returned on success */
Ok = 0,
/* The operation was cancelled (typically by the caller). */
Cancelled = 1,
/* Unknown error. An example of where this error may be returned is
if a Status value received from another address space belongs to
an error-space that is not known in this address space. Also
errors raised by APIs that do not return enough error information
may be converted to this error. */
Unknown = 2,
/* Client specified an invalid argument. Note that this differs
from FAILED_PRECONDITION. INVALID_ARGUMENT indicates arguments
that are problematic regardless of the state of the system
(e.g., a malformed file name). */
Argument = 3,
/* Deadline expired before operation could complete. For operations
that change the state of the system, this error may be returned
even if the operation has completed successfully. For example, a
successful response from a server could have been delayed long
enough for the deadline to expire. */
DeadlineExceeded = 4,
/* Some requested entity (e.g., file or directory) was not found. */
NotFound = 5,
/* Some entity that we attempted to create (e.g., file or directory)
already exists. */
AlreadyExists = 6,
/* The caller does not have permission to execute the specified
operation. PERMISSION_DENIED must not be used for rejections
caused by exhausting some resource (use RESOURCE_EXHAUSTED
instead for those errors). PERMISSION_DENIED must not be
used if the caller can not be identified (use UNAUTHENTICATED
instead for those errors). */
PermissionDenied = 7,
/* The request does not have valid authentication credentials for the
operation. */
Unauthenticated = 16,
/* Some resource has been exhausted, perhaps a per-user quota, or
perhaps the entire file system is out of space. */
ResourceExhausted = 8,
/* Operation was rejected because the system is not in a state
required for the operation's execution. For example, directory
to be deleted may be non-empty, an rmdir operation is applied to
a non-directory, etc.
A litmus test that may help a service implementor in deciding
between FAILED_PRECONDITION, ABORTED, and UNAVAILABLE:
(a) Use UNAVAILABLE if the client can retry just the failing call.
(b) Use ABORTED if the client should retry at a higher-level
(e.g., restarting a read-modify-write sequence).
(c) Use FAILED_PRECONDITION if the client should not retry until
the system state has been explicitly fixed. E.g., if an "rmdir"
fails because the directory is non-empty, FAILED_PRECONDITION
should be returned since the client should not retry unless
they have first fixed up the directory by deleting files from it.
(d) Use FAILED_PRECONDITION if the client performs conditional
REST Get/Update/Delete on a resource and the resource on the
server does not match the condition. E.g., conflicting
read-modify-write on the same resource. */
FailedPrecondition = 9,
/* The operation was aborted, typically due to a concurrency issue
like sequencer check failures, transaction aborts, etc.
See litmus test above for deciding between FAILED_PRECONDITION,
ABORTED, and UNAVAILABLE. */
Aborted = 10,
/* Operation was attempted past the valid range. E.g., seeking or
reading past end of file.
Unlike INVALID_ARGUMENT, this error indicates a problem that may
be fixed if the system state changes. For example, a 32-bit file
system will generate INVALID_ARGUMENT if asked to read at an
offset that is not in the range [0,2^32-1], but it will generate
OUT_OF_RANGE if asked to read from an offset past the current
file size.
There is a fair bit of overlap between FAILED_PRECONDITION and
OUT_OF_RANGE. We recommend using OUT_OF_RANGE (the more specific
error) when it applies so that callers who are iterating through
a space can easily look for an OUT_OF_RANGE error to detect when
they are done. */
OutOfRange = 11,
/* Operation is not implemented or not supported/enabled in this service. */
Unimplemented = 12,
/* Internal errors. Means some invariants expected by underlying
system has been broken. If you see one of these errors,
something is very broken. */
Internal = 13,
/* The service is currently unavailable. This is a most likely a
transient condition and may be corrected by retrying with
a backoff.
See litmus test above for deciding between FAILED_PRECONDITION,
ABORTED, and UNAVAILABLE. */
Unavailable = 14,
/* Unrecoverable data loss or corruption. */
DataLoss = 15,
}
const ALL_STATUSES: &[GrpcStatus] = &[
GrpcStatus::Ok,
GrpcStatus::Cancelled,
GrpcStatus::Unknown,
GrpcStatus::Argument,
GrpcStatus::DeadlineExceeded,
GrpcStatus::NotFound,
GrpcStatus::AlreadyExists,
GrpcStatus::PermissionDenied,
GrpcStatus::Unauthenticated,
GrpcStatus::ResourceExhausted,
GrpcStatus::FailedPrecondition,
GrpcStatus::Aborted,
GrpcStatus::OutOfRange,
GrpcStatus::Unimplemented,
GrpcStatus::Internal,
GrpcStatus::Unavailable,
GrpcStatus::DataLoss,
];
impl GrpcStatus {
/// GrpcStatus as protocol numeric code
pub fn code(&self) -> u32 {
*self as u32
}
/// Find GrpcStatus enum variant by code
pub fn from_code(code: u32) -> Option<GrpcStatus> {
ALL_STATUSES.into_iter().cloned().find(|s| s.code() == code)
}
/// Find GrpcStatus enum variant by code or return default value
pub fn from_code_or_unknown(code: u32) -> GrpcStatus {
GrpcStatus::from_code(code).unwrap_or(GrpcStatus::Unknown)
}
}