mirror of
https://github.com/arangodb/kube-arangodb.git
synced 2024-12-15 17:51:03 +00:00
144 lines
2.6 KiB
Go
144 lines
2.6 KiB
Go
//
|
|
// DISCLAIMER
|
|
//
|
|
// Copyright 2024 ArangoDB GmbH, Cologne, Germany
|
|
//
|
|
// 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.
|
|
//
|
|
// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
//
|
|
|
|
package v1
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
"path"
|
|
"sort"
|
|
"time"
|
|
|
|
"github.com/arangodb/kube-arangodb/pkg/util"
|
|
"github.com/arangodb/kube-arangodb/pkg/util/errors"
|
|
)
|
|
|
|
const MaxSize = 128
|
|
|
|
type cache struct {
|
|
parent *implementation
|
|
|
|
eol time.Time
|
|
|
|
signingToken []byte
|
|
|
|
validationTokens [][]byte
|
|
}
|
|
|
|
func (i *implementation) newCache(cfg Configuration) (*cache, error) {
|
|
files, err := os.ReadDir(i.cfg.Path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var keys []string
|
|
var tokens = make(map[string][]byte)
|
|
|
|
for _, file := range files {
|
|
if file.IsDir() {
|
|
continue
|
|
}
|
|
|
|
data, err := util.OpenWithRead(path.Join(i.cfg.Path, file.Name()), MaxSize)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
if len(data) == 0 {
|
|
continue
|
|
}
|
|
|
|
buff := make([]byte, cfg.Create.MaxSize)
|
|
|
|
for id := range buff {
|
|
buff[id] = 0
|
|
}
|
|
|
|
copy(buff, data)
|
|
|
|
keys = append(keys, file.Name())
|
|
tokens[file.Name()] = buff
|
|
}
|
|
|
|
if len(keys) == 0 {
|
|
return nil, io.ErrUnexpectedEOF
|
|
}
|
|
|
|
sort.Strings(keys)
|
|
|
|
data := make([][]byte, len(keys))
|
|
|
|
for id := range data {
|
|
data[id] = tokens[keys[id]]
|
|
}
|
|
|
|
cache := cache{
|
|
parent: i,
|
|
eol: time.Now().Add(i.cfg.TTL),
|
|
signingToken: tokens[keys[0]],
|
|
validationTokens: data,
|
|
}
|
|
|
|
return &cache, nil
|
|
}
|
|
|
|
func (i *implementation) localGetCache() *cache {
|
|
if c := i.cache; c != nil && c.eol.After(time.Now()) {
|
|
return c
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (i *implementation) withCache() (*cache, error) {
|
|
if c := i.getCache(); c != nil {
|
|
return c, nil
|
|
}
|
|
|
|
return i.refreshCache()
|
|
}
|
|
|
|
func (i *implementation) getCache() *cache {
|
|
i.lock.RLock()
|
|
defer i.lock.RUnlock()
|
|
|
|
return i.localGetCache()
|
|
}
|
|
|
|
func (i *implementation) refreshCache() (*cache, error) {
|
|
i.lock.Lock()
|
|
defer i.lock.Unlock()
|
|
|
|
if c := i.localGetCache(); c != nil {
|
|
return c, nil
|
|
}
|
|
|
|
// Get was not successful, retry
|
|
|
|
if c, err := i.newCache(i.cfg); err != nil {
|
|
return nil, err
|
|
} else if c == nil {
|
|
return nil, errors.Errorf("cache returned is nil")
|
|
} else {
|
|
i.cache = c
|
|
return i.cache, nil
|
|
}
|
|
}
|