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Create Repositories method

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This change removes the Catalog Service and replaces it with a more
simplistic Repositories() method for obtaining a catalog of all
repositories.  The Repositories method takes a pre-allocated slice
and fills it up to the size of the slice and returns the amount
filled.  The catalog is returned lexicographically and will start
being filled from the last entry passed to Repositories().  If there
are no more entries to fill, io.EOF will be returned.

Signed-off-by: Patrick Devine <patrick.devine@docker.com>

Conflicts:
	registry/client/repository.go
	registry/handlers/api_test.go
This commit is contained in:
Patrick Devine 2015-07-17 11:42:47 -07:00
parent f3207e76c8
commit bf62b7ebb7
9 changed files with 246 additions and 137 deletions
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51
docs/storage/catalog.go
View file

@ -1,36 +1,38 @@
package storage
import (
"errors"
"io"
"path"
"sort"
"strings"
log "github.com/Sirupsen/logrus"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
storageDriver "github.com/docker/distribution/registry/storage/driver"
"github.com/docker/distribution/registry/storage/driver"
)
type catalogSvc struct {
ctx context.Context
driver storageDriver.StorageDriver
}
var _ distribution.CatalogService = &catalogSvc{}
// Get returns a list, or partial list, of repositories in the registry.
// Returns a list, or partial list, of repositories in the registry.
// Because it's a quite expensive operation, it should only be used when building up
// an initial set of repositories.
func (c *catalogSvc) Get(maxEntries int, lastEntry string) ([]string, bool, error) {
log.Infof("Retrieving up to %d entries of the catalog starting with '%s'", maxEntries, lastEntry)
var repos []string
func (reg *registry) Repositories(ctx context.Context, repos []string, last string) (n int, err error) {
var foundRepos []string
var errVal error
if len(repos) == 0 {
return 0, errors.New("no space in slice")
}
root, err := defaultPathMapper.path(repositoriesRootPathSpec{})
if err != nil {
return repos, false, err
return 0, err
}
Walk(c.ctx, c.driver, root, func(fileInfo storageDriver.FileInfo) error {
// Walk each of the directories in our storage. Unfortunately since there's no
// guarantee that storage will return files in lexigraphical order, we have
// to store everything another slice, sort it and then copy it back to our
// passed in slice.
Walk(ctx, reg.blobStore.driver, root, func(fileInfo driver.FileInfo) error {
filePath := fileInfo.Path()
// lop the base path off
@ -39,8 +41,8 @@ func (c *catalogSvc) Get(maxEntries int, lastEntry string) ([]string, bool, erro
_, file := path.Split(repoPath)
if file == "_layers" {
repoPath = strings.TrimSuffix(repoPath, "/_layers")
if repoPath > lastEntry {
repos = append(repos, repoPath)
if repoPath > last {
foundRepos = append(foundRepos, repoPath)
}
return ErrSkipDir
} else if strings.HasPrefix(file, "_") {
@ -50,13 +52,14 @@ func (c *catalogSvc) Get(maxEntries int, lastEntry string) ([]string, bool, erro
return nil
})
sort.Strings(repos)
sort.Strings(foundRepos)
n = copy(repos, foundRepos)
moreEntries := false
if len(repos) > maxEntries {
moreEntries = true
repos = repos[0:maxEntries]
// Signal that we have no more entries by setting EOF
if len(foundRepos) <= len(repos) {
errVal = io.EOF
}
return repos, moreEntries, nil
return n, errVal
}