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Type TELEvExceptionActionProc

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Procedural event handler for OnExceptionAction event.

 

Unit

EEvents

 

Syntax

 

Code (Delphi)

TELEvExceptionActionProc = procedure(

const ACustom: Pointer;

AExceptionInfo: TEurekaExceptionInfo;

const AEurekaAction: TEurekaActionType;

const AAdditionalInfo: String;

var AExecute: Boolean;

var ACallNextHandler: Boolean

);

 

Parameters

ACustom [in, optional]

Custom user data parameter. It's the same pointer as it was passed to RegisterEvent-function.

 

AExceptionInfo [in, optional]

Information about exception. Can be nil.

 

AEurekaAction [in]

Action to perform.

 

AAdditionalInfo [in, optional]

Additional information about action (see remarks).

 

AExecute [out]

"Before-like" actions: True - (default) perform action, False - cancel/skip action;

 

"After-like" actions: True - action is successful, False - action was unsuccessful;

 

Note

This argument is ignored for atSendCancelled.

 

 

ACallNextHandler [out]

True (default) - call next registered event handler, False - do not call next event handler.

Tip

Set to False, if you set AExecute to False.

 

 

Remarks

OnExceptionAction event is fired for any action with exception during exception processing: saving to bug report, sending via Internet, etc. You can use this event to alter actions, cancel/skip them, etc.

 

AAdditionalInfo argument holds additional information for actions. Currently this argument have non-empty value for atSending and atSent actions. For these actions - AAdditionalInfo argument holds send engine class name. This information is useful if you use several send methods (for example, HTTP and e-mail). See also.

 

For "before"-like actions: AExecute will determinate if EurekaLog should execute the action. You can use this to skip certain actions (e.g. skip sending, skip dialog, skip saving bug report, etc.).

 

For "after"-like actions: AExecute will determinate if EurekaLog should consider action as succeeded (or failed). You can use this to skip errors.

 

Note

Basically, for most actions EurekaLog follow such pattern (pseudo-code):

 

Code (Delphi)

repeat

 MakeCall := DoEventExceptionAction(... "before" ...);

 try

 if MakeCall then

 Result := PerformAction

 else

 Result := Cancelled;

 except

 Result := UnknownError;

 end;

 Result := DoEventExceptionAction(... "after" ...);

 

 if Failed(Result) then

 Retry := DoEventExceptionError(...)

 else

 Retry := False;

until not Retry;

 

 

Caution!

Any event is called from the context of exception thread, which may be not the main thread of application. Thus, it's highly recommended to avoid using any global-like data and to avoid access VCL objects. If you still need to do any of that - please use proper thread synchronization for globals and Synchronize method for VCL access.

 

Examples

 

Code (Delphi)

try

raise Exception.Create('Error'); // - OnRaise event handler will be called

except

Application.HandleException();

 // - OnExceptionNotify will be called

// - set of OnExceptionAction events will be called

 // (one event for each action (saving, sending, etc).)

end;

 

See also



Send feedback... Build date: 2024-12-19
Last edited: 2024-12-19
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