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/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package storage // import "k8s.io/helm/pkg/storage"
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import (
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rspb "k8s.io/helm/pkg/proto/hapi/release"
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"k8s.io/helm/pkg/storage/driver"
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"log"
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)
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type Storage struct {
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driver.Driver
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}
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// Create creates a new storage entry holding the release. An
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// error is returned if the storage driver failed to store the
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// release, or a release with identical an key already exists.
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func (s *Storage) Create(rls *rspb.Release) error {
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log.Printf("storage: create: %q\n", rls.Name)
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return s.Driver.Create(rls)
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}
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// Update update the release in storage. An error is returned if the
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// storage backend fails to update the release or if the release
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// does not exist.
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func (s *Storage) Update(rls *rspb.Release) error {
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// TODO:
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// 1. Fetch most recent deployed release.
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// 2. If it exists:
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// - Then mark as 'SUPERSEDED'
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// - Then store both new and old.
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// 3. Else:
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// - Create(rls)
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log.Printf("storage: update: %q\n", rls.Name)
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// fetch most recent deployed release
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// old, err := s.Get(rls.Name)
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return s.Driver.Update(rls)
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}
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// Delete deletes the release from storage. An error is returned if
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// the storage backend fails to delete the release or if the release
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// does not exist.
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func (s *Storage) Delete(key string) (*rspb.Release, error) {
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// TODO: Mark the release as DELETED.
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log.Printf("storage: delete: %q\n", key)
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return s.Driver.Delete(key)
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}
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// ListReleases returns all releases from storage. An error is returned if the
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// storage backend fails to retrieve the releases.
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func (s *Storage) ListReleases() ([]*rspb.Release, error) {
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log.Println("storage: list all releases")
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return s.Driver.List(func(_ *rspb.Release) bool { return true })
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}
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// ListDeleted returns all releases with Status == DELETED. An error is returned
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// if the storage backend fails to retrieve the releases.
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func (s *Storage) ListDeleted() ([]*rspb.Release, error) {
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log.Println("storage: list deleted releases")
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return s.Driver.List(func(rls *rspb.Release) bool {
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return StatusFilter(rspb.Status_DELETED).Check(rls)
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})
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}
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// ListDeployed returns all releases with Status == DEPLOYED. An error is returned
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// if the storage backend fails to retrieve the releases.
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func (s *Storage) ListDeployed() ([]*rspb.Release, error) {
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log.Println("storage: list deployed releases")
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return s.Driver.List(func(rls *rspb.Release) bool {
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return StatusFilter(rspb.Status_DEPLOYED).Check(rls)
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})
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}
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// ListFilterAll returns the set of releases satisfying satisfying the predicate
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// (filter0 && filter1 && ... && filterN), i.e. a Release is included in the results
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// if and only if all filters return true.
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func (s *Storage) ListFilterAll(filters ...FilterFunc) ([]*rspb.Release, error) {
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log.Println("storage: list all releases with filter")
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return s.Driver.List(func(rls *rspb.Release) bool {
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return All(filters...).Check(rls)
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})
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}
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// ListFilterAny returns the set of releases satisfying satisfying the predicate
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// (filter0 || filter1 || ... || filterN), i.e. a Release is included in the results
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// if at least one of the filters returns true.
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func (s *Storage) ListFilterAny(filters ...FilterFunc) ([]*rspb.Release, error) {
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log.Println("storage: list any releases with filter")
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return s.Driver.List(func(rls *rspb.Release) bool {
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return Any(filters...).Check(rls)
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})
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}
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func Init(d driver.Driver) *Storage {
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if d == nil {
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d = driver.NewMemory()
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}
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return &Storage{Driver: d}
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}
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