Do you have any design guidance on what to do if an error occurs while handling an exception that occurred?

Although not specifically specified in the language, if the try-catch encounters an error, you want to save the error as a log (WriteExceptionToLogFile section of the code below).

try
{
    // Source from which the exception occurs
}
catch (Exception exception) 
{
    // Write error to log file
    WriteExceptionToLogFile (exception);
    // Show Errors
    DisplayErrorMessageBox("Error Occurred!");
}

Up until now, I have used the above code, but considering that WriteExceptionToLogFile causes errors, I have noticed that there are two problems.

WriteExceptionToLogFile causes an error where the program stops
WriteExceptionToLogFileIn addition to not knowing its own errors, you will not know the exceptions that were supposed to be written by WriteExceptionToLogFile

Is there a way to resolve the above two issues when a logger running in the catch section stops due to an error, or is there an implicit understanding that the logger does not generate an error in the first place?

detailed-design

2022-09-30 11:40

1 Answers

WriteExceptionToLogFile causes an error, where the program stops

I think the word "error" means "Exception", but if an exception is likely to be thrown within WriteExceptionToLogFile, catch it and continue to process it, the program will not stop.

WriteExceptionToLogFile I don't know my own error, and I don't know the exceptions that were supposed to be written by WriteExceptionToLogFile

You can catch an exception thrown in WriteExceptionToLogFile and print the exception and the original exception to another file.However, if writing to the log file fails, it would be better to output it to something other than the log file, such as the standard (error) output, because it is a very exception case such as insufficient disk space.

try{
        // Source from which the exception occurs
    } catch(Exception exception) {
        // Write error to log file
        WriteExceptionToLogFile (exception);
        // Show Errors
        DisplayErrorMessageBox("Error Occurred!");
    }
}

private void WriteExceptionToLogFile (Exception exception) {
    try{
        // Write error to log file
    } catch(Exceptione){
        // Output to standard error stream
        e.printStackTrace();
        System.err.println("Original Exception:");
        exception.printStackTrace();
    }
}

2022-09-30 11:40

If you have any answers or tips

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