Synchronization Engine Offline SPA Data Caching

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Single page applications (SPAs) rely on consistent network connectivity to function properly, leading to user experience issues when connectivity is lost or unreliable, especially in mobile environments.

Innovation Solution

A synchronization engine operates in conjunction with a service worker to dynamically store and update user data and SPA resources from a network server to a user device, enabling offline access and ensuring a consistent user experience regardless of network connectivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If single page applications store code locally for reduced loading times, then user experience is improved, but the application becomes dependent on consistent network connectivity to retrieve user data

Engineering Contradiction:

Improveloading timeVSAvoidnetwork connectivity dependency

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The synchronization engine performs preliminary actions by proactively caching user data and SPA resources locally on the user device before network disconnection occurs. During periods of network connectivity, the engine continuously synchronizes and stores working sets of data and resources, enabling the application to function offline without requiring real-time network access.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The synchronization engine acts as an intermediary layer between the service worker and the network server. It manages the caching strategy, determines what data to cache, and handles the complexity of synchronization logic, allowing the SPA to operate seamlessly whether online or offline without requiring changes to the core application logic.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the application caches user data locally for offline access, then offline functionality is enabled, but storage space on the user device is consumed

Engineering Contradiction:

Improveoffline access capabilityVSAvoidstorage space

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The synchronization engine implements selective caching by identifying and caching only the specific user data and SPA resources that are actually needed for offline functionality. Rather than caching entire applications or all possible data, it caches working sets tailored to the user's specific needs and usage patterns, optimizing the balance between offline capability and storage consumption.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system caches a partial set of data and resources - specifically the working set required for offline operation - rather than caching everything. This partial caching approach provides sufficient offline functionality while avoiding unnecessary storage consumption of data that would not be accessed offline.

Inventive Principle:

Principle #16Partial or excessive action

3Loss of information

If the synchronization engine continuously updates cached data, then data freshness is maintained, but network traffic and processing overhead increase

Engineering Contradiction:

Improvedata freshnessVSAvoidnetwork traffic

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The synchronization engine employs periodic synchronization rather than continuous real-time updates. It synchronizes cached data at intervals or based on specific triggers (such as when the user next connects to the network), reducing network traffic and processing overhead while still maintaining data freshness within acceptable parameters.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The synchronization engine autonomously manages data synchronization without requiring constant user intervention or system resources. It independently determines when and what to synchronize, manages its own caching strategy, and handles updates efficiently, reducing the overall processing overhead and network traffic required to maintain data freshness.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250141978A1Domain agnostic offline runtime for single page applications

Publication Date: 2025.05.01 MICROSOFT TECHNOLOGY LICENSING LLC

AI summary

The techniques disclosed herein provide a synchronization engine that operates in conjunction with a service worker to dynamically store and update a working set of user data and single page application (SPA) resources from a network server to a user device. The working set can be hosted across several domains and identified by association with a user account. Accordingly, the synchronization engine retrieves the working set from the network server to enable offline execution of the single page applications. As such, subsequent requests for interacting with a single page application are then serviced by the synchronization engine using the working set retrieved from the network server. For instance, the service worker can bind user data to the application resources to enable progressive rendering through an application controller using locally available resources. In this way, the disclosed system provides a consistent user experience irrespective of network connectivity.