package storage import ( "errors" "sync" "github.com/kubernetes/helm/pkg/proto/hapi/release" ) // Memory is an in-memory ReleaseStorage implementation. type Memory struct { sync.RWMutex releases map[string]*release.Release } // NewMemory creates a new in-memory storage. func NewMemory() *Memory { return &Memory{ releases: map[string]*release.Release{}, } } // ErrNotFound indicates that a release is not found. var ErrNotFound = errors.New("release not found") // Read returns the named Release. // // If the release is not found, an ErrNotFound error is returned. func (m *Memory) Read(k string) (*release.Release, error) { m.RLock() defer m.RUnlock() v, ok := m.releases[k] if !ok { return v, ErrNotFound } return v, nil } // Create sets a release. func (m *Memory) Create(rel *release.Release) error { m.Lock() defer m.Unlock() m.releases[rel.Name] = rel return nil } // Update sets a release. func (m *Memory) Update(rel *release.Release) error { m.Lock() defer m.Unlock() if _, ok := m.releases[rel.Name]; !ok { return ErrNotFound } // FIXME: When Release is done, we need to do this right by marking the old // release as superseded, and creating a new release. m.releases[rel.Name] = rel return nil } // Delete removes a release. func (m *Memory) Delete(name string) (*release.Release, error) { m.Lock() defer m.Unlock() rel, ok := m.releases[name] if !ok { return nil, ErrNotFound } delete(m.releases, name) return rel, nil } // List returns all releases. func (m *Memory) List() ([]*release.Release, error) { m.RLock() defer m.RUnlock() buf := make([]*release.Release, len(m.releases)) i := 0 for _, v := range m.releases { buf[i] = v i++ } return buf, nil } // Query searches all releases for matches. func (m *Memory) Query(labels map[string]string) ([]*release.Release, error) { m.RLock() defer m.RUnlock() return []*release.Release{}, errors.New("not implemented") } // History returns the history of this release, in the form of a series of releases. func (m *Memory) History(name string) ([]*release.Release, error) { // TODO: This _should_ return all of the releases with the given name, sorted // by LastDeployed, regardless of status. r, err := m.Read(name) if err != nil { return []*release.Release{}, err } return []*release.Release{r}, nil }