How do I track if a controller is leaking?

This skill includes a Controller Lifecycle Tracker and a Navigation Monitor that logs activation counts and memory usage to the XAF Trace log during development.

How should I handle large data processing in XAF to avoid memory issues?

Use scoped ObjectSpaces within a 'using' statement and process records in batches (e.g., 500 records at a time), committing changes and disposing of the ObjectSpace between batches.

Can I store an IObjectSpace in a Session variable?

No, storing an IObjectSpace in a Session or static field is a major anti-pattern that keeps objects alive until the session expires. Always use request-scoped or method-scoped ObjectSpaces.

What is the most common cause of memory leaks in XAF?

The most common cause is failing to unsubscribe from event handlers (like SelectionChanged or ObjectChanged) in both the OnDeactivated and Dispose methods of a ViewController.

XAF Memory Leak Prevention

Name: XAF Memory Leak Prevention
Author: kashiash

bykashiash

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Developer Tools

Diagnoses and prevents memory leaks in DevExpress XAF applications by enforcing correct disposal patterns and event handling.

This skill provides a comprehensive set of patterns and diagnostic tools for developers working with the DevExpress eXpress Application Framework (XAF). It addresses the most common causes of memory growth, such as orphaned event handlers, undisposed ObjectSpaces, and static reference anti-patterns. By implementing the provided ResourceTrackingController, WeakEventSubscription, and batch processing logic, developers can ensure their XAF applications remain stable and performant under heavy load while auditing controller lifecycles and session usage.

Key Features

01ResourceTrackingController for automated disposal of multiple IDisposable objects.

02Standardized event handler symmetry for OnActivated and OnDeactivated methods.

03Scoped ObjectSpace management patterns for both short-lived operations and batch processing.

04Weak event subscription patterns to prevent leaks in long-lived controllers.

052 GitHub stars

06Diagnostic tools including Controller Lifecycle Trackers and Navigation Memory Monitors.

Use Cases

01Debugging session-related memory issues and ObjectSpace lifetime in XAF WebForms applications.

02Optimizing background data processing tasks to handle large datasets without memory exhaustion.

03Auditing legacy XAF ViewControllers for missing event unsubscriptions and disposal logic.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add kashiash/xaf-skills xaf-memory-leaks

For use in Claude.ai and ChatGPT

Key Features

01ResourceTrackingController for automated disposal of multiple IDisposable objects.

02Standardized event handler symmetry for OnActivated and OnDeactivated methods.

03Scoped ObjectSpace management patterns for both short-lived operations and batch processing.

04Weak event subscription patterns to prevent leaks in long-lived controllers.

052 GitHub stars

06Diagnostic tools including Controller Lifecycle Trackers and Navigation Memory Monitors.

Use Cases

01Debugging session-related memory issues and ObjectSpace lifetime in XAF WebForms applications.

02Optimizing background data processing tasks to handle large datasets without memory exhaustion.

03Auditing legacy XAF ViewControllers for missing event unsubscriptions and disposal logic.