mirror of https://github.com/minio/minio.git
Adding fs storage
This commit is contained in:
Frederick F. Kautz IV
parent
3461e7e300
commit
163a6c35db
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@ -0,0 +1,201 @@
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package fs
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import (
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"errors"
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"io"
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"io/ioutil"
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"os"
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"path"
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"strings"
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"sync"
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mstorage "github.com/minio-io/minio/pkg/storage"
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)
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type storage struct {
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root string
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writeLock sync.Mutex
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}
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type MkdirFailedError struct{}
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func (self MkdirFailedError) Error() string {
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return "Mkdir Failed"
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}
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func Start(root string) (chan<- string, <-chan error, *storage) {
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ctrlChannel := make(chan string)
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errorChannel := make(chan error)
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go start(ctrlChannel, errorChannel)
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return ctrlChannel, errorChannel, &storage{root: root}
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}
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func start(ctrlChannel <-chan string, errorChannel chan<- error) {
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close(errorChannel)
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}
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// Bucket Operaotions
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func (storage *storage) ListBuckets(prefix string) ([]mstorage.BucketMetadata, error) {
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return []mstorage.BucketMetadata{}, errors.New("Not Implemented")
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}
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func (storage *storage) StoreBucket(bucket string) error {
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storage.writeLock.Lock()
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defer storage.writeLock.Unlock()
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// verify bucket path legal
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if mstorage.IsValidBucket(bucket) == false {
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return mstorage.BucketNameInvalid{Bucket: bucket}
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}
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// get bucket path
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bucketDir := path.Join(storage.root, bucket)
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// check if bucket exists
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if _, err := os.Stat(bucketDir); err == nil {
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return mstorage.BucketExists{
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Bucket: bucket,
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}
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}
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// make bucket
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err := os.Mkdir(bucketDir, 0700)
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if err != nil {
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return mstorage.EmbedError(bucket, "", err)
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}
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return nil
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}
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// Object Operations
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func (storage *storage) CopyObjectToWriter(w io.Writer, bucket string, object string) (int64, error) {
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// validate bucket
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if mstorage.IsValidBucket(bucket) == false {
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return 0, mstorage.BucketNameInvalid{Bucket: bucket}
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}
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// validate object
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if mstorage.IsValidObject(object) == false {
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return 0, mstorage.ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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objectPath := path.Join(storage.root, bucket, object)
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file, err := os.Open(objectPath)
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if err != nil {
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return 0, mstorage.EmbedError(bucket, object, err)
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}
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count, err := io.Copy(w, file)
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if err != nil {
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return count, mstorage.EmbedError(bucket, object, err)
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}
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return count, nil
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}
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func (storage *storage) GetObjectMetadata(bucket string, object string) (mstorage.ObjectMetadata, error) {
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if mstorage.IsValidBucket(bucket) == false {
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return mstorage.ObjectMetadata{}, mstorage.BucketNameInvalid{Bucket: bucket}
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}
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if mstorage.IsValidObject(bucket) == false {
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return mstorage.ObjectMetadata{}, mstorage.ObjectNameInvalid{Bucket: bucket, Object: bucket}
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}
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objectPath := path.Join(storage.root, bucket, object)
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stat, err := os.Stat(objectPath)
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if os.IsNotExist(err) {
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return mstorage.ObjectMetadata{}, mstorage.ObjectNotFound{Bucket: bucket, Object: object}
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}
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metadata := mstorage.ObjectMetadata{
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Bucket: bucket,
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Key: object,
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Created: stat.ModTime(),
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Size: stat.Size(),
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ETag: bucket + "#" + object,
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}
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return metadata, nil
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}
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func (storage *storage) ListObjects(bucket, prefix string, count int) ([]mstorage.ObjectMetadata, bool, error) {
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if mstorage.IsValidBucket(bucket) == false {
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return []mstorage.ObjectMetadata{}, false, mstorage.BucketNameInvalid{Bucket: bucket}
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}
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if mstorage.IsValidObject(prefix) == false {
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return []mstorage.ObjectMetadata{}, false, mstorage.ObjectNameInvalid{Bucket: bucket, Object: prefix}
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}
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rootPrefix := path.Join(storage.root, bucket)
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files, err := ioutil.ReadDir(rootPrefix)
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if err != nil {
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return []mstorage.ObjectMetadata{}, false, mstorage.EmbedError("bucket", "", err)
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}
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var metadataList []mstorage.ObjectMetadata
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for _, file := range files {
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if len(metadataList) >= count {
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return metadataList, true, nil
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}
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if strings.HasPrefix(file.Name(), prefix) {
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metadata := mstorage.ObjectMetadata{
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Bucket: bucket,
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Key: file.Name(),
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Created: file.ModTime(),
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Size: file.Size(),
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ETag: bucket + "#" + file.Name(),
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}
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metadataList = append(metadataList, metadata)
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}
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}
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return metadataList, false, nil
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}
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func (storage *storage) StoreObject(bucket string, key string, data io.Reader) error {
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// TODO Commits should stage then move instead of writing directly
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storage.writeLock.Lock()
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defer storage.writeLock.Unlock()
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// check bucket name valid
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if mstorage.IsValidBucket(bucket) == false {
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return mstorage.BucketNameInvalid{Bucket: bucket}
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}
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// check bucket exists
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if _, err := os.Stat(path.Join(storage.root, bucket)); os.IsNotExist(err) {
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return mstorage.BucketNotFound{Bucket: bucket}
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}
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// verify object path legal
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if mstorage.IsValidObject(key) == false {
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return mstorage.ObjectNameInvalid{Bucket: bucket, Object: key}
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}
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// get object path
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objectPath := path.Join(storage.root, bucket, key)
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// check if object exists
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if _, err := os.Stat(objectPath); !os.IsNotExist(err) {
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return mstorage.ObjectExists{
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Bucket: bucket,
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Key: key,
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}
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}
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// write object
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file, err := os.OpenFile(objectPath, os.O_WRONLY|os.O_CREATE, 0600)
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defer file.Close()
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if err != nil {
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return mstorage.EmbedError(bucket, key, err)
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}
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_, err = io.Copy(file, data)
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if err != nil {
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return mstorage.EmbedError(bucket, key, err)
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}
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return nil
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}
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@ -0,0 +1,42 @@
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package fs
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import (
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"io/ioutil"
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"log"
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"os"
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"testing"
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mstorage "github.com/minio-io/minio/pkg/storage"
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. "gopkg.in/check.v1"
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)
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func Test(t *testing.T) { TestingT(t) }
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type MySuite struct{}
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var _ = Suite(&MySuite{})
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func (s *MySuite) TestAPISuite(c *C) {
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var storageList []string
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create := func() mstorage.Storage {
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path, err := ioutil.TempDir(os.TempDir(), "minio-fs-")
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log.Println(path)
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c.Check(err, IsNil)
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storageList = append(storageList, path)
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_, _, store := Start(path)
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return store
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}
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log.Println("FOO")
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mstorage.APITestSuite(c, create)
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log.Println("BAR")
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removeRoots(c, storageList)
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}
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func removeRoots(c *C, roots []string) {
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log.Println("REMOVING ROOTS: ", roots)
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for _, root := range roots {
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err := os.RemoveAll(root)
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c.Check(err, IsNil)
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}
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}
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@ -11,10 +11,10 @@ import (
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func APITestSuite(c *C, create func() Storage) {
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testCreateBucket(c, create)
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testMultipleObjectCreation(c, create)
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//testPaging(c, create)
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//testObjectOverwriteFails(c, create)
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//testNonExistantBucketOperations(c, create)
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//testBucketRecreateFails(c, create)
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testPaging(c, create)
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testObjectOverwriteFails(c, create)
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testNonExistantBucketOperations(c, create)
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testBucketRecreateFails(c, create)
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}
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func testCreateBucket(c *C, create func() Storage) {
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@ -58,24 +58,24 @@ func testMultipleObjectCreation(c *C, create func() Storage) {
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func testPaging(c *C, create func() Storage) {
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storage := create()
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storage.StoreBucket("bucket")
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storage.ListObjects("bucket", "", 1000)
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objects, isTruncated, err := storage.ListObjects("bucket", "", 1000)
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storage.ListObjects("bucket", "", 5)
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objects, isTruncated, err := storage.ListObjects("bucket", "", 5)
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c.Check(len(objects), Equals, 0)
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c.Check(isTruncated, Equals, false)
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c.Check(err, IsNil)
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for i := 1; i <= 1000; i++ {
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for i := 1; i <= 5; i++ {
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key := "obj" + strconv.Itoa(i)
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storage.StoreObject("bucket", key, bytes.NewBufferString(key))
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objects, isTruncated, err = storage.ListObjects("bucket", "", 1000)
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objects, isTruncated, err = storage.ListObjects("bucket", "", 5)
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c.Check(len(objects), Equals, i)
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c.Check(isTruncated, Equals, false)
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c.Check(err, IsNil)
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}
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for i := 1001; i <= 2000; i++ {
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for i := 6; i <= 10; i++ {
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key := "obj" + strconv.Itoa(i)
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storage.StoreObject("bucket", key, bytes.NewBufferString(key))
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objects, isTruncated, err = storage.ListObjects("bucket", "", 1000)
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c.Check(len(objects), Equals, 1000)
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objects, isTruncated, err = storage.ListObjects("bucket", "", 5)
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c.Check(len(objects), Equals, 5)
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c.Check(isTruncated, Equals, true)
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c.Check(err, IsNil)
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}
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@ -86,8 +86,13 @@ func testObjectOverwriteFails(c *C, create func() Storage) {
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storage.StoreBucket("bucket")
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err := storage.StoreObject("bucket", "object", bytes.NewBufferString("one"))
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c.Check(err, IsNil)
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err = storage.StoreObject("bucket", "object", bytes.NewBufferString("one"))
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err = storage.StoreObject("bucket", "object", bytes.NewBufferString("three"))
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c.Check(err, Not(IsNil))
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var bytesBuffer bytes.Buffer
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length, err := storage.CopyObjectToWriter(&bytesBuffer, "bucket", "object")
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c.Check(length, Equals, int64(len("one")))
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c.Check(err, IsNil)
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c.Check(string(bytesBuffer.Bytes()), Equals, "one")
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}
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func testNonExistantBucketOperations(c *C, create func() Storage) {
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