URL Slug Concurrency Control for Single-Click Workflows
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Solution Overview
Problem
In single-click environments, user and device errors can lead to multiple single-click URLs associated with contradictory workflows being activated simultaneously, resulting in wasted power and processing resources, and potential errors in action execution.
Innovation Solution
The system uses a slug encoded in URLs to indicate whether an action is controlled for concurrency, preventing the action from being processed if a concurrent action is already being executed. This is achieved by communicating with a remote database to determine if the action is locked, using distributed locking to control concurrency across web instances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-click URLs are used to expedite actions, then user convenience and processing speed are improved, but the risk of contradictory workflows being executed simultaneously increases
Solution Approach 1:
The system performs a preliminary check by examining a specific bit in the slug portion of the URL to determine if the associated action is controlled for concurrency before executing the action. This preliminary identification allows the system to prepare for potential concurrency conflicts in advance, checking the remote database for locked actions and preventing contradictory workflows from being executed simultaneously, thus maintaining reliability while preserving the speed benefits of single-click URLs.
2Reliability
If concurrency control checks are implemented, then execution correctness is improved, but system complexity and processing overhead increase
Solution Approach 1:
The system applies local quality by focusing concurrency control checks only on specific actions that are marked as controlled for concurrency. By examining a particular bit in the slug portion of the URL, the system identifies only those actions that require concurrency control, rather than implementing universal checks on all actions. This selective approach reduces processing overhead and system complexity while maintaining reliability for critical actions.
3Reliability
If distributed locking is used to control concurrency, then workflow correctness is improved, but network communication overhead increases
Solution Approach 1:
The system performs a preliminary check of the remote database to determine whether an action is locked before attempting to execute it. By checking the lock status in advance through a quick database query, the system可以避免 unnecessary network communication and action execution attempts. This preliminary action reduces network traffic and energy consumption while maintaining distributed system consistency through the locking mechanism.
Data Source
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AI summary
In some implementations, a web instance may receive an indication of an event associated with a uniform resource locator (URL) that includes a slug. The web instance may determine, using an indicator encoded in the slug, that the URL is associated with an action that is included in a concurrency control group. The web instance may communicate with a remote database to determine whether the concurrency control group is locked. The web instance may selectively trigger execution of the action based on whether the concurrency control group is locked.