// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package etcdserver

import (
	"errors"

	etcdErr "github.com/coreos/etcd/error"
)

var (
	ErrUnknownMethod          = errors.New("etcdserver: unknown method")
	ErrStopped                = errors.New("etcdserver: server stopped")
	ErrIDRemoved              = errors.New("etcdserver: ID removed")
	ErrIDExists               = errors.New("etcdserver: ID exists")
	ErrIDNotFound             = errors.New("etcdserver: ID not found")
	ErrPeerURLexists          = errors.New("etcdserver: peerURL exists")
	ErrCanceled               = errors.New("etcdserver: request cancelled")
	ErrTimeout                = errors.New("etcdserver: request timed out")
	ErrTimeoutDueToLeaderLost = errors.New("etcdserver: request timed out, possibly due to leader lost")
)

func isKeyNotFound(err error) bool {
	e, ok := err.(*etcdErr.Error)
	return ok && e.ErrorCode == etcdErr.EcodeKeyNotFound
}