/
dirdepot.go
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/
dirdepot.go
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package depot
import (
"errors"
"fmt"
"os"
"path/filepath"
"time"
"code.cloudfoundry.org/guardian/rundmc/goci"
"code.cloudfoundry.org/lager/v3"
)
var ErrDoesNotExist = errors.New("does not exist")
//counterfeiter:generate . BundleSaver
type BundleSaver interface {
Save(bundle goci.Bndl, path string) error
}
//counterfeiter:generate . BundleLoader
type BundleLoader interface {
Load(path string) (goci.Bndl, error)
}
//counterfeiter:generate . BundleLookupper
type BundleLookupper interface {
Lookup(log lager.Logger, handle string) (string, error)
Handles() ([]string, error)
}
// a depot which stores containers as subdirs of a depot directory
type DirectoryDepot struct {
dir string
bundleSaver BundleSaver
bundleLoader BundleLoader
}
func New(dir string, bundleSaver BundleSaver, bundleLoader BundleLoader) *DirectoryDepot {
return &DirectoryDepot{
dir: dir,
bundleSaver: bundleSaver,
bundleLoader: bundleLoader,
}
}
func (d *DirectoryDepot) Create(log lager.Logger, handle string, bundle goci.Bndl) (string, error) {
log = log.Session("depot-create", lager.Data{"handle": handle})
log.Info("started")
defer log.Info("finished")
containerDir := d.toDir(handle)
if err := os.MkdirAll(containerDir, 0755); err != nil {
log.Error("mkdir-failed", err, lager.Data{"path": containerDir})
return "", err
}
errs := func(msg string, err error) error {
removeOrLog(log, containerDir)
log.Error(msg, err, lager.Data{"path": containerDir})
return err
}
if err := d.bundleSaver.Save(bundle, containerDir); err != nil {
return "", errs("create-failed", err)
}
return containerDir, nil
}
func (d *DirectoryDepot) CreatedTime(log lager.Logger, handle string) (time.Time, error) {
dir, err := d.Lookup(log, handle)
if err != nil {
return time.Time{}, err
}
info, err := os.Stat(filepath.Join(dir, "pidfile"))
if err != nil {
return time.Time{}, fmt.Errorf("bundle pidfile does not exist: %#v", err)
}
return info.ModTime(), nil
}
func (d *DirectoryDepot) Load(log lager.Logger, handle string) (goci.Bndl, error) {
log = log.Session("lood", lager.Data{"handle": handle})
log.Debug("started")
defer log.Debug("finished")
bundlePath, err := d.Lookup(log, handle)
if err != nil {
return goci.Bndl{}, err
}
return d.bundleLoader.Load(bundlePath)
}
func (d *DirectoryDepot) Lookup(log lager.Logger, handle string) (string, error) {
log = log.Session("lookup", lager.Data{"handle": handle})
log.Debug("started")
defer log.Debug("finished")
if _, err := os.Stat(d.toDir(handle)); err != nil {
return "", ErrDoesNotExist
}
return d.toDir(handle), nil
}
func (d *DirectoryDepot) Destroy(log lager.Logger, handle string) error {
log = log.Session("destroy", lager.Data{"handle": handle})
log.Info("started")
defer log.Info("finished")
return os.RemoveAll(d.toDir(handle))
}
func (d *DirectoryDepot) GetDir() string {
return d.dir
}
func (d *DirectoryDepot) Handles() ([]string, error) {
handles := []string{}
fileInfos, err := os.ReadDir(d.dir)
if err != nil {
return handles, fmt.Errorf("invalid depot directory %s: %s", d.dir, err)
}
for _, f := range fileInfos {
handles = append(handles, f.Name())
}
return handles, nil
}
func (d *DirectoryDepot) toDir(handle string) string {
return filepath.Join(d.dir, handle)
}
func removeOrLog(log lager.Logger, path string) {
if err := os.RemoveAll(path); err != nil {
log.Error("remove-failed", err, lager.Data{"path": path})
}
}