3 d @sRddlZddlZejdZGdddZGdddZeZejZejZej Z dS)NZtraitsc@s eZdZdZddZddZdS)ObserverExceptionHandlera, State for an exception handler. Parameters ---------- handler : callable(event) or None A callable to handle an event, in the context of an exception. If None, the exceptions will be logged. reraise_exceptions : boolean Whether to reraise the exception. cCs|dk r |n|j|_||_dS)N)_log_exceptionhandlerreraise_exceptions)selfrrrG/tmp/pip-build-7vycvbft/traits/traits/observation/exception_handling.py__init__!sz!ObserverExceptionHandler.__init__cCstjd|dS)z A handler that logs the exception with the given event. Parameters ---------- event : object An event object emitted by the notification. zFException occurred in traits notification handler for event object: %rN)_logger exception)reventrrrr%sz'ObserverExceptionHandler._log_exceptionN)__name__ __module__ __qualname____doc__r rrrrrrs rc@s2eZdZdZddZd ddZdd Zd d ZdS) ObserverExceptionHandlerStackz A stack of exception handlers. Parameters ---------- handlers : list of ObserverExceptionHandler The last item is the current handler. cCs g|_dS)N)handlers)rrrrr =sz&ObserverExceptionHandlerStack.__init__NFcCs|jjt||ddS)a Push a new exception handler into the stack. Making it the current exception handler. Parameters ---------- handler : callable(event) or None A callable to handle an event, in the context of an exception. If None, the exceptions will be logged. reraise_exceptions : boolean Whether to reraise the exception. )rrN)rappendr)rrrrrrpush_exception_handler@s z4ObserverExceptionHandlerStack.push_exception_handlercCs |jjS)z Pop the current exception handler from the stack. Raises ------ IndexError If there are no handlers to pop. )rpop)rrrrpop_exception_handlerSsz3ObserverExceptionHandlerStack.pop_exception_handlerc CsVtj\}}}y|jd}Wn tk r<tddd}YnX|j||jrR|dS)z Handle a notification exception using the handler last pushed. Parameters ---------- event : object An event object emitted by the notification. NF)rr)sysexc_infor IndexErrorrrr)rr _ZexcpZ handler_staterrrhandle_exception]s z.ObserverExceptionHandlerStack.handle_exception)NF)r rrrr rrrrrrrr4s   r) loggingr getLoggerr rrZ_exception_handler_stackrrrrrrrs ?