v1.1.0

Improved performance of purge_orphan_items function by implementing batch item deletions

• Replaced usage of Boto3 DynamoDB client delete_item with batch_write_item for deleting items in DynamoDB. This change improves performance by reducing the number of requests made to DynamoDB and allowing for batch deletions.
• Added internal _delete_items function to handle the batch_write_item operation.
• Added closure submit_delete_items to the purge_orphan_items function, which contains the executor.submit call to _delete_items and the delete_items_callback function.

v1.0.0

Initial release with purge_orphan_items function

• The purge_orphan_items function has been added to delete orphan garbage items in DynamoDB tables. This function allows you to specify two tables (parent_table and child_table), a key attribute for both tables (key_attribute), a reference attribute in the child table (child_reference_attribute), and an optional timestamp attribute in the child table (timestamp_attribute). The function performs a scan of the parent table and collects all the IDs of the items in that table. Then, it scans the child table and deletes those items whose reference attribute is not found in the list of parent table IDs and, if optional timestamp attribute is provided, whose timestamp attribute is earlier than a specified maximum time (by default, one hour ago). A ThreadPoolExecutor is used to perform the deletion operations concurrently and a counter of deleted items is displayed during execution.