Application State Capture and Restoration After Unexpected Shutdown
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Solution Overview
Problem
Unexpected shutdowns of computer applications result in loss of application state and user data, requiring users to redeploy applications and reposition documents after restart, leading to inconvenience and data loss.
Innovation Solution
Implementing a system that periodically saves application state and user data, allowing for automatic restoration upon restart, including the use of a restart manager module to notify applications to save data before shutdown, and an application restoration module to re-deploy applications and user data to their previous states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If application state and user data are periodically saved, then data loss is reduced, but system memory usage and processing overhead increase
Solution Approach 1:
The system performs preliminary actions by periodically saving application state and user data to memory before unexpected shutdowns occur. The periodic save mechanism proactively stores current state information at predetermined intervals, ensuring that recent state is preserved without requiring continuous monitoring or intervention. This preliminary saving reduces data loss while the periodic nature balances resource consumption.
2Ease of operation
If application state is automatically restored after shutdown, then user convenience is improved, but system complexity increases
Solution Approach 1:
The system implements self-service by automatically restoring application state without requiring user intervention. Upon application restart, the restoration module autonomously retrieves previously saved state data from memory and reinstates the application to its prior state, including window positions, document states, and selection information. This eliminates manual redeployment efforts while the automation is achieved through integrated hooks and modules that work within the existing application framework.
3Productivity
If periodic data saving is implemented, then productivity is maintained after shutdown, but device complexity increases
Solution Approach 1:
The system segments the productivity preservation function into distinct modular components: a periodic capture module that saves state at intervals, a memory management module that stores state data, and a restoration module that reinstates state upon restart. Each module has a specific responsibility, allowing the system to maintain productivity through coordinated operation of simpler, specialized components rather than a monolithic complex system.
Data Source
AI summary
During unexpected application shutdowns, application settings states are captured, and displayed application states are restored upon subsequent application restart. User data displayed prior to shutdown may also be restored to pre-shutdown states. Data representing in-use application settings states and in-use user data are stored on a periodic basis, or upon notification of an impending application shutdown. Upon restart, any application deployed prior to shutdown is re-deployed according to the stored application settings states for each application, and any in-use documents or other data may be re-deployed according to the stored user data.