xl/fs: Split object layer into interface. (#1415)

object-interface.go

@@ -0,0 +1,43 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import "io"
+
+// ObjectLayer implements primitives for object API layer.
+type ObjectLayer interface {
+	// Bucket operations.
+	MakeBucket(bucket string) error
+	GetBucketInfo(bucket string) (bucketInfo BucketInfo, err error)
+	ListBuckets() (buckets []BucketInfo, err error)
+	DeleteBucket(bucket string) error
+	ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error)
+
+	// Object operations.
+	GetObject(bucket, object string, startOffset int64) (reader io.ReadCloser, err error)
+	GetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error)
+	PutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string) (md5 string, err error)
+	DeleteObject(bucket, object string) error
+
+	// Multipart operations.
+	ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error)
+	NewMultipartUpload(bucket, object string) (uploadID string, err error)
+	PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string) (md5 string, err error)
+	ListObjectParts(bucket, object, uploadID string, partNumberMarker int, maxParts int) (result ListPartsInfo, err error)
+	AbortMultipartUpload(bucket, object, uploadID string) error
+	CompleteMultipartUpload(bucket, object, uploadID string, uploadedParts []completePart) (md5 string, err error)
+}