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79 lines
2.9 KiB
Go
79 lines
2.9 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package errdefs defines the common errors used throughout containerd
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// packages.
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//
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// Use with errors.Wrap and error.Wrapf to add context to an error.
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//
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// To detect an error class, use the IsXXX functions to tell whether an error
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// is of a certain type.
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//
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// The functions ToGRPC and FromGRPC can be used to map server-side and
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// client-side errors to the correct types.
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package errdefs
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import "github.com/pkg/errors"
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// Definitions of common error types used throughout containerd. All containerd
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// errors returned by most packages will map into one of these errors classes.
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// Packages should return errors of these types when they want to instruct a
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// client to take a particular action.
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//
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// For the most part, we just try to provide local grpc errors. Most conditions
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// map very well to those defined by grpc.
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var (
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ErrUnknown = errors.New("unknown") // used internally to represent a missed mapping.
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ErrInvalidArgument = errors.New("invalid argument")
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ErrNotFound = errors.New("not found")
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ErrAlreadyExists = errors.New("already exists")
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ErrFailedPrecondition = errors.New("failed precondition")
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ErrUnavailable = errors.New("unavailable")
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ErrNotImplemented = errors.New("not implemented") // represents not supported and unimplemented
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)
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// IsInvalidArgument returns true if the error is due to an invalid argument
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func IsInvalidArgument(err error) bool {
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return errors.Cause(err) == ErrInvalidArgument
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}
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// IsNotFound returns true if the error is due to a missing object
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func IsNotFound(err error) bool {
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return errors.Cause(err) == ErrNotFound
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}
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// IsAlreadyExists returns true if the error is due to an already existing
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// metadata item
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func IsAlreadyExists(err error) bool {
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return errors.Cause(err) == ErrAlreadyExists
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}
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// IsFailedPrecondition returns true if an operation could not proceed to the
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// lack of a particular condition
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func IsFailedPrecondition(err error) bool {
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return errors.Cause(err) == ErrFailedPrecondition
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}
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// IsUnavailable returns true if the error is due to a resource being unavailable
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func IsUnavailable(err error) bool {
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return errors.Cause(err) == ErrUnavailable
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}
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// IsNotImplemented returns true if the error is due to not being implemented
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func IsNotImplemented(err error) bool {
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return errors.Cause(err) == ErrNotImplemented
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}
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