An exception is a rarely occurring (exceptional!) condition that requires deviation from the program's normal flow.
0
votes
1answer
33 views
How to handle returned value if an exception happens in a library code
There is a lib code, trying to parse an Element Tree object. If exception happens, it either returns an empty dict of dict or a partially constructed object of such type. In this case, caller needs to ...
1
vote
1answer
63 views
Accumulating inner exception messages
Say, there is a class with some methods, that have try catch blocks. I need to accumulate messages from all inner exceptions of generated exception and use throw new Exception(exceptionMessages).
I ...
2
votes
2answers
93 views
Raising an assertation error if string is not an email
I created a class EmailParser and check if a supplied string is an email or not with
the help of the standard librarie's email module. If the supplied string is not an
email I raise an exception.
...
0
votes
3answers
85 views
Java Exception Message
I have a few custom exception classes that I created simply for the sake of having my own exception message:
public class DivideByZeroException extends Exception
{
@Override
public String ...
2
votes
2answers
79 views
Closing a ResultSet and rethrowing an Exception
Is this an acceptable way to make sure a java.sql.ResultSet is always closed, and also make sure that an Exception caught is propagated to the caller?
Please don't hesitate to review other aspects ...
6
votes
5answers
207 views
Handling null exception when having multiple variables
I have a lot of variables that I need to check for exceptions and output the empty field in case of a null returned value (I am reading a calender list from Sharepoint and my program is supposed to ...
2
votes
1answer
158 views
Is there anything wrong with my self-implemented C++ exception class?
I wrote my own exception class, deriving from std::runtime_error to have Error-IDs, timestamps and inner exceptions.
It seems to work, but are there any drawbacks?
The only thing I see is the ...
9
votes
13answers
1k views
Can I return a null in a function if something goes wrong?
Lets say I have a function that should return me the information about all textfiles in a folder:
public static FileInfo[] GetTxtFiles()
{
//...
FileInfo[] files = directory.GetFiles("*.txt");
...
2
votes
1answer
162 views
Suggestions for improving error handling
I am interested in finding out what is the correct way of implementing error handling for this situation in C#.
The system tries to do an operation. If the operation succeeded (returns a non-error ...
9
votes
3answers
1k views
Is it better practice to have void method throw an exception or to have the method return a boolean?
This falls straight into the same category with the recent "Is it better practice to return if false or execute an if statement if true?" question.
Often, while writing code, I find myself presented ...
2
votes
2answers
542 views
HttpClient error handling
I would be happy to hear feedback on my implementation of httpclient. I am not so strong with error handling so I want to improve. My thought process behind this was that IOExceptions can be ...
1
vote
1answer
124 views
Rails stylistic exception and bang usage
Question whether I should be throwing exceptions in the below model code (and rescuing in the controller - rescues not implemented below) or returning nil (in both or one of the exception cases). ...
0
votes
1answer
53 views
uplifitng return value error reporting to Exception based error reporting
In Framework Design guideline book there is a chapter about Exception and they talk about return-value-based error reporting and exception based error reporting and the fact that we in a O.O language ...
1
vote
1answer
105 views
PHP - Is this proper use of exceptions for error handling within classes?
I've searched plenty on this topic and have gotten a lot of good (but different) results. Some of the results weren't quite related and it does seem to be a matter of preference in the end, but I'm ...
4
votes
2answers
3k views
Is this the wrong way to handle AggregateException with Tasks
I'm seeing a lot of code like this at my new site
try
{
Task.Factory.StartNew(() =>
{
...
});
}
catch ...
2
votes
3answers
158 views
Exception handling continuing the excecution
This code is for continuing the execution after an exception, and this is ugly:
int step=0;
do{
try{
switch(step)
{
case 0:
...
2
votes
1answer
296 views
Simple factory pattern in scala (attempting to restrict use of new)
I am a Scala newbie and attempting to improve my skills. I have decided to be playful about it and work to do a conversion of the spaceinvaders game supplied with the LWJGL. It consists of 10 Java ...
2
votes
1answer
192 views
Critical review of a Simple Class
public partial class CreateAdmin : System.Web.UI.Page
{
#region Events.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
...
3
votes
5answers
829 views
C++ try … catch inside or outside a loop when rethrowing it
try
{
for (int i = 0; i < n; ++i)
{
nothrow_stuff();
could_raise_an_exception();
nothrow_stuff();
}
}
catch (...)
{
ensure_everything_is_fine();
throw;
}
...
2
votes
1answer
273 views
An implementation of “finally” in C++0x
I've made a quick finally type in C++:
template<class F>
class finally_type {
public:
explicit finally_type(F f) : function(f) {}
~finally_type() { try { function(); } catch (...) {} }
...
2
votes
2answers
1k views
Generic C++ exception catch handler macro
I have this set of legacy C++ projects with a large number of public functions. At the start none of those publicly exposed functions had try..catch insulation inside them. When a C++ exception ...
2
votes
3answers
455 views
Clumsy try catch - how to perfect it?
I have the following construction in the program:
while(true) {
<...>
try {
JobManager.markJobCompleted(unitOfWork.getSqlFactory(), jobId, dataOut);
} catch ...
13
votes
5answers
828 views
What’s your opinion on a Throw() method?
Lately I seem to run into a situation very frequently where I want to write something like the following:
var x =
condition1 ? value1 :
condition2 ? value2 :
condition3 ? value3 :
...
7
votes
4answers
795 views
Providing unchecked exception “wrapper” interfaces for an API with checked exceptions
I recently had a discussion in the forum of an API, because they changed an exception from checked to unchecked. I believed it needs to be checked, because it is recoverable. The arguments of "the ...
5
votes
2answers
2k views
Handling COM exceptions / busy codes
This code writes to Excel using the COM interface. The general issue is that any exception handling has to handle the "Excel is busy" exception. This occurs if information is sent to Excel quicker ...
