/
etcd.go
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/
etcd.go
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// 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 registry
import (
"path"
"time"
etcd "github.com/coreos/etcd/client"
"golang.org/x/net/context"
)
const DefaultKeyPrefix = "/_coreos.com/fleet/"
func NewEtcdRegistry(kAPI etcd.KeysAPI, keyPrefix string, reqTimeout time.Duration) *EtcdRegistry {
return &EtcdRegistry{
kAPI: kAPI,
keyPrefix: keyPrefix,
reqTimeout: reqTimeout,
}
}
// EtcdRegistry fulfils the Registry interface and uses etcd as a backend
type EtcdRegistry struct {
kAPI etcd.KeysAPI
keyPrefix string
reqTimeout time.Duration
}
func (r *EtcdRegistry) ctx() context.Context {
ctx, _ := context.WithTimeout(context.Background(), r.reqTimeout)
return ctx
}
func (r *EtcdRegistry) prefixed(p ...string) string {
return path.Join(r.keyPrefix, path.Join(p...))
}
func isEtcdError(err error, code int) bool {
eerr, ok := err.(etcd.Error)
return ok && eerr.Code == code
}