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versitygw/backend/meta/meta.go
2024-05-06 16:16:31 -07:00

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1.8 KiB
Go

// Copyright 2024 Versity Software
// This file is 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 meta
// MetadataStorer defines the interface for managing metadata.
// When object == "", the operation is on the bucket.
type MetadataStorer interface {
// RetrieveAttribute retrieves the value of a specific attribute for an object or a bucket.
// Returns the value of the attribute, or an error if the attribute does not exist.
RetrieveAttribute(bucket, object, attribute string) ([]byte, error)
// StoreAttribute stores the value of a specific attribute for an object or a bucket.
// If attribute already exists, new attribute should replace existing.
// Returns an error if the operation fails.
StoreAttribute(bucket, object, attribute string, value []byte) error
// DeleteAttribute removes the value of a specific attribute for an object or a bucket.
// Returns an error if the operation fails.
DeleteAttribute(bucket, object, attribute string) error
// ListAttributes lists all attributes for an object or a bucket.
// Returns list of attribute names, or an error if the operation fails.
ListAttributes(bucket, object string) ([]string, error)
// DeleteAttributes removes all attributes for an object or a bucket.
// Returns an error if the operation fails.
DeleteAttributes(bucket, object string) error
}