91 lines
2.4 KiB
Go
91 lines
2.4 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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package metabase
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import (
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"context"
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"database/sql"
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"errors"
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"storj.io/common/uuid"
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"storj.io/storj/private/tagsql"
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)
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const deleteBatchSizeLimit = 100
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// DeleteBucketObjects contains arguments for deleting a whole bucket.
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type DeleteBucketObjects struct {
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Bucket BucketLocation
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BatchSize int
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// DeletePieces is called for every batch of objects.
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// Slice `segments` will be reused between calls.
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DeletePieces func(ctx context.Context, segments []DeletedSegmentInfo) error
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}
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// DeleteBucketObjects deletes all objects in the specified bucket.
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func (db *DB) DeleteBucketObjects(ctx context.Context, opts DeleteBucketObjects) (deletedObjectCount int64, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.Bucket.Verify(); err != nil {
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return 0, err
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}
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batchSize := opts.BatchSize
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if batchSize <= 0 || batchSize > deleteBatchSizeLimit {
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batchSize = deleteBatchSizeLimit
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}
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// TODO: fix the count for objects without segments
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var deleteSegments []DeletedSegmentInfo
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for {
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deleteSegments = deleteSegments[:0]
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err = withRows(db.db.Query(ctx, `
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WITH deleted_objects AS (
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DELETE FROM objects
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WHERE stream_id IN (
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SELECT stream_id FROM objects
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WHERE project_id = $1 AND bucket_name = $2
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LIMIT $3
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)
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RETURNING objects.stream_id
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)
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DELETE FROM segments
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WHERE segments.stream_id in (SELECT deleted_objects.stream_id FROM deleted_objects)
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RETURNING segments.stream_id, segments.root_piece_id, segments.remote_pieces
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`, opts.Bucket.ProjectID, opts.Bucket.BucketName, batchSize))(func(rows tagsql.Rows) error {
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ids := map[uuid.UUID]struct{}{} // TODO: avoid map here
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for rows.Next() {
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var streamID uuid.UUID
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var segment DeletedSegmentInfo
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err := rows.Scan(&streamID, &segment.RootPieceID, &segment.Pieces)
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if err != nil {
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return Error.Wrap(err)
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}
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ids[streamID] = struct{}{}
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deleteSegments = append(deleteSegments, segment)
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}
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deletedObjectCount += int64(len(ids))
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return nil
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})
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return deletedObjectCount, nil
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}
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return deletedObjectCount, Error.Wrap(err)
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}
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if len(deleteSegments) == 0 {
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return deletedObjectCount, nil
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}
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if opts.DeletePieces != nil {
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err = opts.DeletePieces(ctx, deleteSegments)
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if err != nil {
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return deletedObjectCount, Error.Wrap(err)
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}
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}
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}
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}
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