mirror of https://github.com/helm/helm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
2.5 KiB
110 lines
2.5 KiB
/*
|
|
Copyright 2016 The Kubernetes Authors All rights reserved.
|
|
|
|
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 driver // import "k8s.io/helm/pkg/storage/driver"
|
|
|
|
import (
|
|
"sync"
|
|
|
|
rspb "k8s.io/helm/pkg/proto/hapi/release"
|
|
)
|
|
|
|
// Memory is an in-memory storage driver implementation.
|
|
type Memory struct {
|
|
sync.RWMutex
|
|
cache map[string]*rspb.Release
|
|
}
|
|
|
|
func NewMemory() *Memory {
|
|
return &Memory{cache: map[string]*rspb.Release{}}
|
|
}
|
|
|
|
// Create creates a new release or error.
|
|
func (mem *Memory) Create(rls *rspb.Release) error {
|
|
defer unlock(mem.wlock())
|
|
|
|
if _, ok := mem.cache[rls.Name]; ok {
|
|
return ErrReleaseExists
|
|
}
|
|
mem.cache[rls.Name] = rls
|
|
return nil
|
|
}
|
|
|
|
// Get returns the release named by key.
|
|
func (mem *Memory) Get(key string) (*rspb.Release, error) {
|
|
defer unlock(mem.rlock())
|
|
|
|
if rls, ok := mem.cache[key]; ok {
|
|
return rls, nil
|
|
}
|
|
return nil, ErrReleaseNotFound
|
|
}
|
|
|
|
// List returns all releases whose status is not Status_DELETED.
|
|
func (mem *Memory) List(filter func(*rspb.Release) bool) ([]*rspb.Release, error) {
|
|
defer unlock(mem.rlock())
|
|
|
|
var releases []*rspb.Release
|
|
for k := range mem.cache {
|
|
if filter(mem.cache[k]) {
|
|
releases = append(releases, mem.cache[k])
|
|
}
|
|
}
|
|
return releases, nil
|
|
}
|
|
|
|
// Update updates a release or error.
|
|
func (mem *Memory) Update(rls *rspb.Release) error {
|
|
defer unlock(mem.wlock())
|
|
|
|
if old, ok := mem.cache[rls.Name]; ok {
|
|
// FIXME: when release update is complete, old release should
|
|
// be marked as superseded, creating the new release.
|
|
_ = old
|
|
|
|
mem.cache[rls.Name] = rls
|
|
return nil
|
|
}
|
|
return ErrReleaseNotFound
|
|
}
|
|
|
|
// Delete deletes a release or error.
|
|
func (mem *Memory) Delete(key string) (*rspb.Release, error) {
|
|
defer unlock(mem.wlock())
|
|
|
|
if old, ok := mem.cache[key]; ok {
|
|
old.Info.Status.Code = rspb.Status_DELETED
|
|
delete(mem.cache, key)
|
|
return old, nil
|
|
}
|
|
return nil, ErrReleaseNotFound
|
|
}
|
|
|
|
func (mem *Memory) wlock() func() {
|
|
mem.Lock()
|
|
return func() {
|
|
mem.Unlock()
|
|
}
|
|
}
|
|
|
|
func (mem *Memory) rlock() func() {
|
|
mem.RLock()
|
|
return func() {
|
|
mem.RUnlock()
|
|
}
|
|
}
|
|
|
|
func unlock(fn func()) { fn() }
|