@Ani have already answered your question. Although I don’t agree that unhandled exceptions in threads should terminate applications. Using threads usually means that you have some kind of server application. Bringing it down could result in a lot of angry users. I’ve written a small piece about proper exception handling: https://coderr.io/exception-handling You should always catch … Read more
My guess is that this is compiler dependent. However, throwing an exception in the callback would be a very bad idea. Either it will flat-out not work, or the C code in the SQLite library will be unable to handle it. Consider if this is some code in SQLite: { char * p = malloc( … Read more
To clarify the quote in Jon’s answer, only one exception can be thrown by a method (per execution) but it is possible, in the case of a try-with-resources, for multiple exceptions to be thrown. For instance one might be thrown in the block and another might be thrown from the implicit finally provided by the … Read more
How about: conn = MySQLdb.connect(host, user, password, database) cursor = conn.cursor() attempts = 0 while attempts < 3: try: cursor.execute(query) rows = cursor.fetchall() for row in rows: # do something with the data break except MySQLdb.Error, e: attempts += 1 print “MySQL Error %d: %s” % (e.args[0], e.args[1])
Here’s some info that may be of use in debugging your problem If an exception is uncaught, the special library function std::terminate() is automatically called. Terminate is actually a pointer to a function and default value is the Standard C library function std::abort(). If no cleanups occur for an uncaught exception†, it may actually be … Read more
To answer your second question first. If you’re using JUnit 4, you can annotate your test with @Test(expected=MyException.class) to assert that an exception has occured. And to “mock” an exception with mockito, use when(myMock.doSomething()).thenThrow(new MyException());
Your question makes an assertion, that “Writing exception-safe code is very hard”. I will answer your questions first, and then, answer the hidden question behind them. Answering questions Do you really write exception safe code? Of course, I do. This is the reason Java lost a lot of its appeal to me as a C++ … Read more
You can add an event handler to AppDomain.UnhandledException event, and it’ll be called when a exception is thrown and not caught.
I know you’re asking about performance overhead, but you really should not use try/catch and if interchangeably. try/catch is for things that go wrong that are outside of your control and not in the normal program flow. For example, trying to write to a file and the file system is full? That situation should typically … Read more
I just had a similar problem with Elmah not working in an IIS7 deployment. I found that I needed to register the Elmah Modules and Handlers in system.web AND system.webServer: <system.web> … <httpHandlers> … <add verb=”POST,GET,HEAD” path=”elmah.axd” type=”Elmah.ErrorLogPageFactory, Elmah” /> … </httpHandlers> <httpModules> … <add name=”ErrorLog” type=”Elmah.ErrorLogModule, Elmah”/> <add name=”ErrorMail” type=”Elmah.ErrorMailModule, Elmah” /> <add name=”ErrorFilter” … Read more