Not getting callbacks for some System Events

Question

I have a component that needs to run some code in the event of game/editor/program shutdown.

I have set up the component to get callbacks from ISystemEventListener and CrySystemEventBus.

**I am receiving some events** to my component, so I am pretty sure it is setup correctly, but I am **not** receiving the shutdown related events.

Headers are included:

```
#include  // for ISystemEventListener #include  // for CrySystemEventBus
```
Classes are inherited

```
	class myComponent
: public AZ::Component
, public CrySystemEventBus::Handler
, public ISystemEventListener
```
Functions are overridden:

```

void OnSystemEvent(ESystemEvent event, UINT_PTR wparam, UINT_PTR lparam) override;
void OnCrySystemPreInitialize(ISystem& system, const SSystemInitParams& systemInitParams) override;
void OnCrySystemShutdown(ISystem& system) override;
```
For example, this **is** working:

```
	void myComponent::OnCrySystemCVarRegistry()
{
AZ_TracePrintf("myComponent", "OnCrySystemCVarRegistry");
}
```
This is **not** working:

```
	void myComponent::OnCrySystemShutdown(ISystem& system)
{
AZ_TracePrintf("myComponent", "OnCrySystemShutdown");
}
```
In the below, ESYSTEM_EVENT_GAME_POST_INIT, SYSTEM_EVENT_GAME_POST_INIT_DONE, and ESYSTEM_EVENT_EDITOR_GAME_MODE_CHANGED **are** working, but ESYSTEM_EVENT_LEVEL_UNLOAD, ESYSTEM_EVENT_FULL_SHUTDOWN, ESYSTEM_EVENT_FAST_SHUTDOWN are **not** working.

```
	void myComponent::OnSystemEvent(ESystemEvent event, UINT_PTR wparam, UINT_PTR lparam)
{
switch (event)
{
case ESYSTEM_EVENT_GAME_POST_INIT:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_GAME_POST_INIT");
break;
case ESYSTEM_EVENT_GAME_POST_INIT_DONE:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_GAME_POST_INIT_DONE");
break;
case ESYSTEM_EVENT_EDITOR_GAME_MODE_CHANGED:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_EDITOR_GAME_MODE_CHANGED");
break;
case ESYSTEM_EVENT_LEVEL_UNLOAD:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_LEVEL_UNLOAD");
break;
case ESYSTEM_EVENT_FULL_SHUTDOWN:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_FULL_SHUTDOWN");
break;
case ESYSTEM_EVENT_FAST_SHUTDOWN:
AZ_TracePrintf("myComponent", "ESYSTEM_EVENT_FAST_SHUTDOWN");
break;
}
}
```
To see if it might be something with my component, I went and added AZ_TracePrintf to Starter Game in StarterGameGemModule.cpp in the OnSystemEvent function, and I also didn't see any log output. I've also tried adding breakpoints and none of those were triggered.

Is there something I am missing here? Thanks for the help!

@REDACTEDUSER

Accepted Answer

Hi @REDACTEDUSER

Shutdown events are actually being reworked to a certain extent. Right now, shutdown events are skipped to do an immediate shutdown, allowing the OS to handle the memory de-allocation. This is handy for speed, but obviously creates problems if you are looking for a shutdown event. If you need a specific shutdown event, you can look for where Quit() is called (in the C++) and build from there. We're hoping to provide some more details soon regarding the rework, but in the meantime, let me know if you have additional questions!

Answer

Any updates? Thanks.

@REDACTEDUSER

Answer

Apologies for the massive delays @REDACTEDUSER

Answer

@REDACTEDUSER

Thanks for the info. I try to avoid altering the engine/editor source wherever possible, but in this case it looks like I'll have to do so or wait until you have something to share.

Thanks for the response.

Not getting callbacks for some System Events

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