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config.go
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config.go
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// Copyright Project Harbor Authors
//
// 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 config provide methods to get the configurations reqruied by code in src/common
package config
import (
"fmt"
"time"
"github.com/astaxie/beego/cache"
"github.com/goharbor/harbor/src/adminserver/client"
"github.com/goharbor/harbor/src/common"
)
// Manager manages configurations
type Manager struct {
client client.Client
Cache bool
cache cache.Cache
key string
}
// NewManager returns an instance of Manager
func NewManager(client client.Client, enableCache bool) *Manager {
m := &Manager{
client: client,
}
if enableCache {
m.Cache = true
m.cache = cache.NewMemoryCache()
m.key = "cfg"
}
return m
}
// Load configurations, if cache is enabled, cache the configurations
func (m *Manager) Load() (map[string]interface{}, error) {
c, err := m.client.GetCfgs()
if err != nil {
return nil, err
}
if m.Cache {
expi, err := getCfgExpiration(c)
if err != nil {
return nil, err
}
// copy the configuration map so that later modification to the
// map does not effect the cached value
cachedCfgs := map[string]interface{}{}
for k, v := range c {
cachedCfgs[k] = v
}
if err = m.cache.Put(m.key, cachedCfgs,
time.Duration(expi)*time.Second); err != nil {
return nil, err
}
}
return c, nil
}
// Reset configurations
func (m *Manager) Reset() error {
return m.client.ResetCfgs()
}
func getCfgExpiration(m map[string]interface{}) (int, error) {
if m == nil {
return 0, fmt.Errorf("can not get cfg expiration as configurations are null")
}
expi, ok := m[common.CfgExpiration]
if !ok {
return 0, fmt.Errorf("cfg expiration is not set")
}
return int(expi.(float64)), nil
}
// Get : if cache is enabled, read configurations from cache,
// if cache is null or cache is disabled it loads configurations directly
func (m *Manager) Get() (map[string]interface{}, error) {
if m.Cache {
c := m.cache.Get(m.key)
if c != nil {
return c.(map[string]interface{}), nil
}
}
return m.Load()
}
// Upload configurations
func (m *Manager) Upload(cfgs map[string]interface{}) error {
return m.client.UpdateCfgs(cfgs)
}