The tag has no wiki summary.

learn more… | top users | synonyms

0
votes
1answer
22 views

Exception handling scope when dealing with nested exceptions

Assume you have one object that has two methods which both throw different exceptions. These methods must be used together. For instance: SqlCon{ static SqlCon connect(string user, string pass) ...
20
votes
11answers
5k views

Is the 'finally' portion of a 'try … catch … finally' construct even necessary? [duplicate]

Some languages (such as C++ and early versions of PHP) don't support the finally part of a try ... catch ... finally construct. Is finally ever necessary? Because the code in it always runs, why ...
1
vote
2answers
106 views

Is it a Good Practice to Catch All Exception? [duplicate]

The snippet below (in java) gives an example of my question. try { // code implementation here } } catch (Exception ex) { } ...
2
votes
1answer
98 views

How to differentiate between exceptions coming from system and business logic?

I would like to differentiate between exceptions coming from business logic like requested database record does not exist attempt to store invalid business data (validation failed) provided CSV file ...
3
votes
2answers
168 views

How to deal with historic exception specifications in maintained C++ code

Today, I discovered a few exception specifications in legacy code I've to maintain, when Cppcheck 1.68 ([Inconclusive] but correctly) pointed out that the specified exceptions are not handled in ...
0
votes
1answer
109 views

Where would be better to handle an exception?

Imagine I have the following DAO method: public Employee getEmployeeById(Integer id){ NamedParameterJdbcTemplate jdbcTemplate = new NamedParameterJdbcTemplate(getJdbcTemplate()); String sql = ...
3
votes
2answers
112 views

Scala and exception handling [closed]

I am curious why exception handling is a topic often ignored in Scala. Is it the goal of the language (or the style) to not rely on exception handling except for external input/code? I was hoping ...
0
votes
3answers
100 views

Coerce bad input or always crash early

The general consensus seems to favor the Crash Early approach, the most reputable source being the acclaimed Pragmatic Programmer book. And while I understand and agree with the advice in many ...
0
votes
1answer
89 views

Replacing Throwing Exceptions with Notification in Validations

Martin Fowler recommends replacing exceptions with notifications when dealing with validations. Essentially, instead of throwing an exception, you append error messages to a Notification object that ...
5
votes
2answers
519 views

How should I handle logger failures?

In several of our company's applications, we use a custom logger. It's fairly robust, though we may replace it with something like NLog in the future. One of the logger's tasks is to log any ...
2
votes
1answer
68 views

Under which circumstances does it make sense to lose track of where an exception was thrown from?

Is there any valid reason why a catch block on a lower layer would throw back an exception caused by a higher, unknown layer using the following syntax: throw ex; ... rather than: throw; ... ? ...
0
votes
1answer
52 views

Advice needed on rethrowing an exception

Consider the following c# code: public class ExceptionManager { public static void TreatException(Exception ex) { if (ShowAndContinue(ex)) // display a user-friendly ...
3
votes
1answer
118 views

Exceptions in ANSI C

Would it be possible to implement exception mechanism in pure ANSI C similar to the one used in popular OOP languages (with familiar try-catch-finally clauses)? If yes then how? I'm especially ...
1
vote
4answers
168 views

Java exception handling design

I am trying to design a simple exception handling strategy for web services middleware using some ideas from here: http://northconcepts.com/blog/2013/01/18/6-tips-to-improve-your-exception-handling/. ...
3
votes
3answers
500 views

Should service layer catch all dao exceptions and wrap them as service exceptions?

I have three layer Spring web app: dao, service and controllers. A controller never calls directly the dao, it does it through the service layer. Right now, most of the time if there is dao exception ...
1
vote
1answer
344 views

Exceptions: What to handle, what to throw

I have a custom configuration reader which performs various functions on top of .NET's CloudConfigurationManager and ConfigurationManager implementations, such as caching, type conversion, etc. The ...
3
votes
4answers
487 views

Is it possible/good idea to reduce chance of crashing by catching Error?

I have a class the implements A which will run a certain method of class B. There is a requirement that this A should never crash when running this operation (which is not possible, right?). To ...
11
votes
4answers
2k views

Why design a modern language without an exception-handling mechanism?

Many modern languages provide rich exception handling features, but Apple's Swift programming language does not provide an exception handling mechanism. Steeped in exceptions as I am, I'm having ...
1
vote
3answers
74 views

Logging instance information in Exceptions

During development on a large existing codebase I've started to capture variable values in my Exception logging. For example: public int Foo(int a, int b) { int returnInt; try{ returnInt ...
1
vote
3answers
169 views

Null checking whilst navigating object hierarchies

I had to implement some code which traversed a small object hierarchy to fetch a value and display it in a TextView object (this is Android / Java). I had to do this 6 times to populate 6 TextViews ...
2
votes
1answer
123 views

RefactorException: Good idea or bad idea?

When I'm doing large scale refactors I'm often commenting out the contents of methods and using NotImplementedExceptions for stuff that I still need to refactor. Problem is that this is interfering ...
0
votes
2answers
130 views

Logging Exception in multi-tier application

I'm building a multi-tier enterprise application using Spring. I have different layers: Controller, Business and Provider. Within the application I've built a custom error handling mini-framework that ...
1
vote
1answer
193 views

Why is Throwable initCause designed to be called only once?

I find it really odd that the initCause method of Java's Throwable class can only be called once, or even not at all (if the constructor accepting a Throwable was used). This makes exception chaining ...
2
votes
2answers
50 views

How to ensure the success of processes after a deadlock exception occurs?

No matter the programming language is and whatever the database is, the concept should be the same: I have 2 threads, each locking some database entities and inserting new data in database. Let's ...
3
votes
1answer
205 views

Checked vs unchecked exception when validating documents in this service

I have a service that allow users to add dynamic content to a repository. So basically I have a generic Document class that contains a list of property for that specific object depending on what type ...
3
votes
1answer
200 views

Java-Like 'throws'-information in method signature C#

From Java I know that the signatures of methods that can throw exceptions contain a throws block, that contains the Exception(s) that might be thrown. In C# there is no such thing and it is also not ...
3
votes
4answers
206 views

How much data should exceptions hold?

Almost all the exceptions I have ever written have been very lightweight, containing a String message and optionally a throwable. In some situations I have included some application specific enum or ...
1
vote
0answers
37 views

Multiple handlers of an exception, and handling exceptions in the UI

Related to: Is onError handler better than exceptions? Premise I am writing a piece of library code that performs certain tasks, to separate concerns, we decided it should not write to a log or ...
2
votes
2answers
164 views

What kind of exception to ask for out of range arguments?

What type of exception should I throw? I have a console class which describes rectangle of cells which a user can index by passing in a coordinate: width, height = 80, 25 console = ...
4
votes
4answers
227 views

Is it OK to let invalid arguments slip to another method?

For example lets take this method: public List<string[]> ReadAll(int listCapacity) { List<string[]> list = new List<string[]>(listCapacity); while (Read()) { ...
0
votes
2answers
391 views

IllegalStateException vs. IllegalArgumentException

In have written a function which expects the caller to pass in a configuration file like XML. Then I parse this given file and extract something which i then return. In this function (at least) two ...
0
votes
1answer
221 views

Using Statement lambda in exception handling

Following is a code snippet from MVP Win Forms application and this explanation would be helpful when answering the questions. My DAL doesn't handle exceptions and it will be propagated up to the ...
1
vote
1answer
131 views

Exception handling in WIn Forms application

When handling exceptions for example in a method in my presentation logic, is it ok to catch all possible exceptions in a one catch block as follows if the only purpose here is alerting the user. ...
1
vote
1answer
148 views

DAL Exception handling in a MVP application

In a MVP win forms application I'm handling exceptions as follows in DAL. Since the user messaging is not a responsibility of DAL, I want to move it in to my Presentation class. Could you show me a ...
0
votes
0answers
85 views

How to void checked exceptions in Java? [duplicate]

I consider checked exception for a design mistake in the Java language. They lead to leaky abstractions and a lot of clutter in the code. It seems that they force the programmer to handle exceptions ...
2
votes
1answer
120 views

How to present domain model exceptions thrown through validation

In domain model of my web application I've an entity Foo which can be created only by a pojo FooBean: Foo.newInstance(FooBean fooBean) (Might have been better a Builder-pattern.) In the factory ...
10
votes
6answers
2k views

Should you throw an exception if a method's input values are out of range? [duplicate]

Should you throw an exception if a method's input values are out of range? eg //no imaginary numbers public int MySquareRoot(int x) { if (x<0) { throw new ...
0
votes
1answer
188 views

Is ok to throw exception in normal code path which eliminate a possible programmer error? [duplicate]

I know that exception should be thrown in exceptional case (e.g. out of memory, programmer error). For these cases, I don't need to worry about performance throwing these exception. But what happen ...
11
votes
6answers
796 views

alternatives to nested try-catches for fallbacks

I have a situation where I am trying to retrieve an object. If the lookup fails I have several fallbacks in place, each of which may fail. So the code looks like: try { return ...
1
vote
3answers
263 views

Exception when logging exception: is it correct to ignore them?

My question is specific to php, but i think it can be useful in other languages. I log into a table all the exception a code can throw: try{ //Some code } catch (Exception $e) { $log = new ...
10
votes
4answers
488 views

Purposely raising exceptions to use catch

For a typical if...else wrapped with exception handling, is something like the following example a recommended practice to avoid code duplication? try { if (GetDataFromServer()) { ...
14
votes
1answer
879 views

Is it fine to make a default constructor unusable?

Specifically asking about the default constructor Given that the constructor initializes all the data for an object, if I create a class that can't be used without proper initialization, is it not ...
3
votes
4answers
332 views

Should exceptions do things other than tell the user something went wrong?

I created a general class that accepts a string when it is constructed, and it spits out that string when a user calls what(). This is all it does; on throw, it returns the initializing string. ...
1
vote
1answer
55 views

Partial recovery from an Exception [duplicate]

I have seen Exception Handling blocks that they were throwing the recently caught Exception in the catch block. Something like: } catch ( Exception $e ) { // Do some recovery here ...
67
votes
8answers
8k views

Exceptions: Why throw early? Why catch late?

There are many well-known best practices about exception handling in isolation. I know the "do's and don'ts" well enough, but things get complicated when it comes to best practices or patterns in ...
3
votes
4answers
285 views

Using configuration to determine whether to handle exception or bubble it up

On a side project I'm working on I came up with a way of handling exceptions that's adjustable by configuration. So a try/catch block might look like this: try { fileHelper.MoveFile(file, ...
21
votes
4answers
3k views

Workaround for Java checked exceptions

I appreciate a lot the new Java 8 features about lambdas and default methods interfaces. Yet, I still get bored with checked exceptions. For instance, if I just want to list all the visible fields of ...
3
votes
2answers
129 views

Inform caller or just let them deal with exception?

I'm not sure how to proceed in the following situation. say we have a function as so: def runsATask(codes): myDicts = [helperFunc(code) for code in codes] for item in myDicts: # some ...
12
votes
5answers
619 views

Exception handling in a program that needs to run 24/7

I have read that we should only catch exceptions that can be handled, which makes catching the base exception class (C# in this case) a bad idea (on top of other reasons). I am currently part of a ...
1
vote
2answers
157 views

Should I Aggregate Web API Errors?

The Situation We are writing a REST API that performs validation up-front. The code is written such that it tries to find as many errors as possible. However, each error might correspond to a ...