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#2562 thread warden #2563
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            richardTingle
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            #2562 thread warden #2563
                    richardTingle
  wants to merge
  12
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  jMonkeyEngine:master
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richardTingle:#2562-thread-warden
  
      
      
   
              
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    … in scene graph operations. This update adds the SceneGraphThreadWarden to enforce that scene graph mutations occur only on the main thread IF those nodes are already part of the main scene graph
…here all nodes were restricted
Introduce tests to verify thread safety of scene graph mutations under various conditions. Includes checks for both main-thread and non-main-thread scenarios with attached and detached objects. Ensures compliance with scene graph thread safety guarantees.
… handling Added tests to validate thread safety in scenarios involving nested nodes, such as attaching/detaching children and grandchildren. Ensures proper restriction and release of thread protections for hierarchical structures. This strengthens coverage for complex scene graph operations.
…ort for disabling the thread warden via a system property.
…ice is being used where futures aren't promptly collected)
              
                    riccardobl
  
              
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                    Sep 27, 2025 
                  
              
              
            
            
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Thanks! This is going to be very useful.
I've commented some minor details I'd like you to review 👍
…all be optised out
              
                    riccardobl
  
              
              approved these changes
              
                  
                    Sep 27, 2025 
                  
              
              
            
            
| Thanks! I am going to merge this asap on my fork, to give it some testing, just in case we are overlooking on some side effect. | 
  
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Purpose
The scene graph (that is connected to the root node) shouldn't be mutated from any thread but the main thread.
Unconnected nodes etc can be mutated on non main threads
What have I changed
Spatial mutations are now watched (when asserts are turned on) and if an illegal mutation is made an exception is fired
closes #2562