159 lines
6.7 KiB
Go
159 lines
6.7 KiB
Go
/*
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*
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* Copyright 2014, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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// Package codes defines the canonical error codes used by gRPC. It is
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// consistent across various languages.
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package codes // import "google.golang.org/grpc/codes"
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// A Code is an unsigned 32-bit error code as defined in the gRPC spec.
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type Code uint32
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//go:generate stringer -type=Code
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const (
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// OK is returned on success.
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OK Code = 0
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// Canceled indicates the operation was cancelled (typically by the caller).
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Canceled Code = 1
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// Unknown error. An example of where this error may be returned is
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// if a Status value received from another address space belongs to
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// an error-space that is not known in this address space. Also
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// errors raised by APIs that do not return enough error information
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// may be converted to this error.
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Unknown Code = 2
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// InvalidArgument indicates client specified an invalid argument.
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// Note that this differs from FailedPrecondition. It indicates arguments
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// that are problematic regardless of the state of the system
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// (e.g., a malformed file name).
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InvalidArgument Code = 3
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// DeadlineExceeded means operation expired before completion.
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// For operations that change the state of the system, this error may be
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// returned even if the operation has completed successfully. For
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// example, a successful response from a server could have been delayed
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// long enough for the deadline to expire.
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DeadlineExceeded Code = 4
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// NotFound means some requested entity (e.g., file or directory) was
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// not found.
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NotFound Code = 5
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// AlreadyExists means an attempt to create an entity failed because one
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// already exists.
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AlreadyExists Code = 6
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// PermissionDenied indicates the caller does not have permission to
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// execute the specified operation. It must not be used for rejections
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// caused by exhausting some resource (use ResourceExhausted
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// instead for those errors). It must not be
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// used if the caller cannot be identified (use Unauthenticated
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// instead for those errors).
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PermissionDenied Code = 7
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// Unauthenticated indicates the request does not have valid
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// authentication credentials for the operation.
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Unauthenticated Code = 16
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// ResourceExhausted indicates some resource has been exhausted, perhaps
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// a per-user quota, or perhaps the entire file system is out of space.
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ResourceExhausted Code = 8
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// FailedPrecondition indicates operation was rejected because the
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// system is not in a state required for the operation's execution.
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// For example, directory to be deleted may be non-empty, an rmdir
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// operation is applied to a non-directory, etc.
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//
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// A litmus test that may help a service implementor in deciding
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// between FailedPrecondition, Aborted, and Unavailable:
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// (a) Use Unavailable if the client can retry just the failing call.
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// (b) Use Aborted if the client should retry at a higher-level
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// (e.g., restarting a read-modify-write sequence).
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// (c) Use FailedPrecondition if the client should not retry until
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// the system state has been explicitly fixed. E.g., if an "rmdir"
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// fails because the directory is non-empty, FailedPrecondition
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// should be returned since the client should not retry unless
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// they have first fixed up the directory by deleting files from it.
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// (d) Use FailedPrecondition if the client performs conditional
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// REST Get/Update/Delete on a resource and the resource on the
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// server does not match the condition. E.g., conflicting
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// read-modify-write on the same resource.
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FailedPrecondition Code = 9
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// Aborted indicates the operation was aborted, typically due to a
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// concurrency issue like sequencer check failures, transaction aborts,
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// etc.
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//
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// See litmus test above for deciding between FailedPrecondition,
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// Aborted, and Unavailable.
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Aborted Code = 10
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// OutOfRange means operation was attempted past the valid range.
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// E.g., seeking or reading past end of file.
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//
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// Unlike InvalidArgument, this error indicates a problem that may
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// be fixed if the system state changes. For example, a 32-bit file
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// system will generate InvalidArgument if asked to read at an
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// offset that is not in the range [0,2^32-1], but it will generate
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// OutOfRange if asked to read from an offset past the current
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// file size.
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//
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// There is a fair bit of overlap between FailedPrecondition and
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// OutOfRange. We recommend using OutOfRange (the more specific
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// error) when it applies so that callers who are iterating through
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// a space can easily look for an OutOfRange error to detect when
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// they are done.
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OutOfRange Code = 11
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// Unimplemented indicates operation is not implemented or not
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// supported/enabled in this service.
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Unimplemented Code = 12
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// Internal errors. Means some invariants expected by underlying
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// system has been broken. If you see one of these errors,
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// something is very broken.
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Internal Code = 13
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// Unavailable indicates the service is currently unavailable.
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// This is a most likely a transient condition and may be corrected
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// by retrying with a backoff.
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//
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// See litmus test above for deciding between FailedPrecondition,
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// Aborted, and Unavailable.
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Unavailable Code = 14
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// DataLoss indicates unrecoverable data loss or corruption.
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DataLoss Code = 15
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)
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