ObjectReplicationBackfillMapper

Info

MyBatis mapper interface for reading legacy resource rows during cross-provider backfill migration.

Overview

ObjectReplicationBackfillMapper provides read-only queries against existing business tables (users, wallpapers, feedback) to identify objects that need replication. Each method returns rows after a given ID for cursor-based pagination.

Methods

Method	Source Table	Description	Returns
listUserAvatarRows(afterId, limit)	User table	Scan user avatar URLs (includes role for admin detection)	List<Map>
listWallpaperAssetRows(afterId, limit)	Wallpaper table	Scan wallpaper URLs (original + 3 thumbnail sizes)	List<Map>
listIssueFeedbackRows(afterId, limit)	Feedback table	Scan feedback attachment URLs (log + screenshot)	List<Map>

Cursor Pagination

All methods use WHERE id > #{afterId} ORDER BY id LIMIT #{limit} for efficient, resumable scanning. The checkpoint system stores the last processed ID.

Tips

These queries return raw Map<String, Object> rather than typed entities to avoid coupling the replication module to business domain models.