Shared Playlist Synchronization via Ordered Change Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for synchronizing shared lists across multiple devices often face conflicts due to differing edit operations, leading to loss of older versions and disruptions in the ordering of items, particularly in media playlists.
Innovation Solution
A synchronization service computing machine processes change operations in a specific order, prioritizing delete operations, followed by add operations, and then re-order operations, while maintaining changes from multiple devices, ensuring the final playlist aligns with user expectations and respects the ordering of items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the most recently received edits are maintained, then the synchronization process is simple, but older versions of edits from different devices are discarded causing loss of information
Solution Approach 1:
The patent segments change operations into distinct categories (add, delete, re-order) and processes them in a specific sequence. By dividing the complex synchronization problem into manageable segments, the system can maintain simplicity while preserving all edit versions through structured processing of each segment type in order.
2Productivity
If change operations are processed in a fixed order, then the processing is efficient, but the ordering of items in the shared list may be disrupted
Solution Approach 1:
The patent applies preliminary action by processing delete operations before add operations, and add operations before re-order operations. This predetermined sequence prevents ordering disruptions by establishing a stable foundation first (deleting items), then building upon it (adding items), and finally adjusting positions (re-ordering), thus maintaining efficiency while preserving stability.
3Reliability
If all change operations are applied to the current version, then the shared list is updated completely, but conflicts between simultaneous edits from multiple devices occur
Solution Approach 1:
The patent segments change operations into distinct types (add, delete, re-order) and processes them in a predetermined sequence. This segmentation allows the system to apply changes systematically without conflicts, as each segment type is processed in a specific order that prevents simultaneous edit conflicts while maintaining complete updates.
Solution Approach 2:
The patent applies preliminary action by processing delete operations before add operations. This sequence ensures that deletions are applied to the current version first, establishing a clean state, and then additions are made. This prevents conflicts by ensuring that no two add operations compete for the same position, while still applying all changes completely.
Data Source
AI summary
Various embodiments relating to synchronizing changes to a shared list of items between different devices are provided. In one embodiment, a first set of change operations for a first version of a shared list may be received from a first device. The first set of change operations may be performed on the first version of the shared list to produce a second version of the shared list. A second set of change operations for the first version of the shared list may be received from a second device. The second set of change operations may be performed on the second version of the shared list to produce a third version of the shared list that maintains changes that are made by the first set of change operations but that are not made by the second set of change operations.