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Keeping the lexical order same add optimizations, provide a comprehensive response from ListObjects()

This commit is contained in:
Harshavardhana 2015-06-27 13:12:33 -07:00
parent 795e48d492
commit f3c25bcfc4
6 changed files with 49 additions and 42 deletions
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11
pkg/storage/donut/bucket.go
View File

@ -145,7 +145,7 @@ func (b bucket) getBucketMetadata() (*AllBuckets, error) {
}
// ListObjects - list all objects
func (b bucket) ListObjects(prefix, marker, delimiter string, maxkeys int) ([]string, []string, bool, error) {
func (b bucket) ListObjects(prefix, marker, delimiter string, maxkeys int) (ListObjects, error) {
b.lock.RLock()
defer b.lock.RUnlock()
if maxkeys <= 0 {
@ -155,7 +155,7 @@ func (b bucket) ListObjects(prefix, marker, delimiter string, maxkeys int) ([]st
var objects []string
bucketMetadata, err := b.getBucketMetadata()
if err != nil {
return nil, nil, false, iodine.New(err, nil)
return ListObjects{}, iodine.New(err, nil)
}
for objectName := range bucketMetadata.Buckets[b.getBucketName()].BucketObjects {
if strings.HasPrefix(objectName, strings.TrimSpace(prefix)) {
@ -193,7 +193,12 @@ func (b bucket) ListObjects(prefix, marker, delimiter string, maxkeys int) ([]st
}
sort.Strings(results)
sort.Strings(commonPrefixes)
return results, commonPrefixes, isTruncated, nil
listObjects := ListObjects{}
listObjects.Objects = results
listObjects.CommonPrefixes = commonPrefixes
listObjects.IsTruncated = isTruncated
return listObjects, nil
}
// ReadObject - open an object to read

7
pkg/storage/donut/definitions.go
View File

@ -64,3 +64,10 @@ type BucketMetadata struct {
Metadata map[string]string `json:"metadata"`
BucketObjects map[string]interface{} `json:"objects"`
}
// ListObjects container for list objects response
type ListObjects struct {
Objects []string `json:"objects"`
CommonPrefixes []string `json:"commonPrefixes"`
IsTruncated bool `json:"isTruncated"`
}

12
pkg/storage/donut/donut.go
View File

@ -151,7 +151,7 @@ func (dt donut) ListBuckets() (map[string]BucketMetadata, error) {
}
// ListObjects - return list of objects
func (dt donut) ListObjects(bucket, prefix, marker, delimiter string, maxkeys int) ([]string, []string, bool, error) {
func (dt donut) ListObjects(bucket, prefix, marker, delimiter string, maxkeys int) (ListObjects, error) {
dt.lock.RLock()
defer dt.lock.RUnlock()
errParams := map[string]string{
@ -162,16 +162,16 @@ func (dt donut) ListObjects(bucket, prefix, marker, delimiter string, maxkeys in
"maxkeys": strconv.Itoa(maxkeys),
}
if err := dt.listDonutBuckets(); err != nil {
return nil, nil, false, iodine.New(err, errParams)
return ListObjects{}, iodine.New(err, errParams)
}
if _, ok := dt.buckets[bucket]; !ok {
return nil, nil, false, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
return ListObjects{}, iodine.New(BucketNotFound{Bucket: bucket}, errParams)
}
objects, commonPrefixes, isTruncated, err := dt.buckets[bucket].ListObjects(prefix, marker, delimiter, maxkeys)
listObjects, err := dt.buckets[bucket].ListObjects(prefix, marker, delimiter, maxkeys)
if err != nil {
return nil, nil, false, iodine.New(err, errParams)
return ListObjects{}, iodine.New(err, errParams)
}
return objects, commonPrefixes, isTruncated, nil
return listObjects, nil
}
// PutObject - put object

33
pkg/storage/donut/donut_test.go
View File

@ -91,10 +91,11 @@ func (s *MySuite) TestEmptyBucket(c *C) {
c.Assert(donut.MakeBucket("foo", "private"), IsNil)
// check if bucket is empty
objects, _, istruncated, err := donut.ListObjects("foo", "", "", "", 1)
listObjects, err := donut.ListObjects("foo", "", "", "", 1)
c.Assert(err, IsNil)
c.Assert(objects, IsNil)
c.Assert(istruncated, Equals, false)
c.Assert(listObjects.Objects, IsNil)
c.Assert(listObjects.CommonPrefixes, IsNil)
c.Assert(listObjects.IsTruncated, Equals, false)
}
// test bucket list
@ -303,23 +304,23 @@ func (s *MySuite) TestMultipleNewObjects(c *C) {
/// test list of objects
// test list objects with prefix and delimiter
listObjects, prefixes, isTruncated, err := donut.ListObjects("foo", "o", "", "1", 10)
listObjects, err := donut.ListObjects("foo", "o", "", "1", 10)
c.Assert(err, IsNil)
c.Assert(isTruncated, Equals, false)
c.Assert(prefixes[0], Equals, "obj1")
c.Assert(listObjects.IsTruncated, Equals, false)
c.Assert(listObjects.CommonPrefixes[0], Equals, "obj1")
// test list objects with only delimiter
listObjects, prefixes, isTruncated, err = donut.ListObjects("foo", "", "", "1", 10)
listObjects, err = donut.ListObjects("foo", "", "", "1", 10)
c.Assert(err, IsNil)
c.Assert(listObjects[0], Equals, "obj2")
c.Assert(isTruncated, Equals, false)
c.Assert(prefixes[0], Equals, "obj1")
c.Assert(listObjects.Objects[0], Equals, "obj2")
c.Assert(listObjects.IsTruncated, Equals, false)
c.Assert(listObjects.CommonPrefixes[0], Equals, "obj1")
// test list objects with only prefix
listObjects, _, isTruncated, err = donut.ListObjects("foo", "o", "", "", 10)
listObjects, err = donut.ListObjects("foo", "o", "", "", 10)
c.Assert(err, IsNil)
c.Assert(isTruncated, Equals, false)
c.Assert(listObjects, DeepEquals, []string{"obj1", "obj2"})
c.Assert(listObjects.IsTruncated, Equals, false)
c.Assert(listObjects.Objects, DeepEquals, []string{"obj1", "obj2"})
three := ioutil.NopCloser(bytes.NewReader([]byte("three")))
metadata["contentLength"] = strconv.Itoa(len("three"))
@ -336,8 +337,8 @@ func (s *MySuite) TestMultipleNewObjects(c *C) {
c.Assert(readerBuffer3.Bytes(), DeepEquals, []byte("three"))
// test list objects with maxkeys
listObjects, _, isTruncated, err = donut.ListObjects("foo", "o", "", "", 2)
listObjects, err = donut.ListObjects("foo", "o", "", "", 2)
c.Assert(err, IsNil)
c.Assert(isTruncated, Equals, true)
c.Assert(len(listObjects), Equals, 2)
c.Assert(listObjects.IsTruncated, Equals, true)
c.Assert(len(listObjects.Objects), Equals, 2)
}

2
pkg/storage/donut/interfaces.go
View File

@ -35,7 +35,7 @@ type ObjectStorage interface {
MakeBucket(bucket, acl string) error
// Bucket operations
ListObjects(bucket, prefix, marker, delim string, maxKeys int) (objects []string, prefixes []string, isTruncated bool, err error)
ListObjects(bucket, prefix, marker, delim string, maxKeys int) (ListObjects, error)
// Object operations
GetObject(bucket, object string) (io.ReadCloser, int64, error)

26
pkg/storage/drivers/donut/donut.go
View File

@ -327,12 +327,6 @@ func (d donutDriver) GetObjectMetadata(bucketName, objectName string) (drivers.O
return objectMetadata, nil
}
type byObjectKey []drivers.ObjectMetadata
func (b byObjectKey) Len() int { return len(b) }
func (b byObjectKey) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b byObjectKey) Less(i, j int) bool { return b[i].Key < b[j].Key }
// ListObjects - returns list of objects
func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
d.lock.RLock()
@ -349,30 +343,30 @@ func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketReso
if !drivers.IsValidObjectName(resources.Prefix) {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
}
actualObjects, commonPrefixes, isTruncated, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter,
resources.Maxkeys)
listObjects, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter, resources.Maxkeys)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
}
resources.CommonPrefixes = commonPrefixes
resources.IsTruncated = isTruncated
resources.CommonPrefixes = listObjects.CommonPrefixes
resources.IsTruncated = listObjects.IsTruncated
if resources.IsTruncated && resources.IsDelimiterSet() {
resources.NextMarker = actualObjects[len(actualObjects)-1]
resources.NextMarker = listObjects.Objects[len(listObjects.Objects)-1]
}
var results []drivers.ObjectMetadata
for _, objectName := range actualObjects {
// make sure to keep the lexical order same as returned by donut
// we do not have to sort here again
results := make([]drivers.ObjectMetadata, len(listObjects.Objects))
for i, objectName := range listObjects.Objects {
objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
}
metadata := drivers.ObjectMetadata{
Key: objectName,
Key: objectMetadata.Object,
Created: objectMetadata.Created,
Size: objectMetadata.Size,
}
results = append(results, metadata)
results[i] = metadata
}
sort.Sort(byObjectKey(results))
return results, resources, nil
}