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1
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3answers
58 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 ...
10
votes
4answers
339 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()) { ...
1
vote
3answers
120 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
119 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
66 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
88 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
47 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
110 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
171 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
200 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
29 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
92 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
222 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()) { ...
8
votes
3answers
1k views

“how bad” is unrelated code in try-catch-finally block?

This is a related Q: Is use of finally clause for doing work after return bad style/dangerous? In the referenced Q, the finally code is related to the structure used and the necessity of ...
0
votes
2answers
171 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 ...
25
votes
11answers
10k views

Is using nested try-catch blocks an anti-pattern?

Is this an antipattern? It is an acceptable practice? try { //do something } catch (Exception e) { try { //do something in the same line, but being less ambitious ...
56
votes
8answers
6k views

Exceptions: Why throw early, why catch late?

There are many well-known best practices about exception handling in isolation. I also know the do and don'ts very well, but I search for a best practices or patterns in larger environments, ...
0
votes
0answers
64 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
76 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
81 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
82 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 ...
10
votes
6answers
1k 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 ...
2
votes
1answer
87 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 ...
0
votes
1answer
150 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 ...
1
vote
3answers
232 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 ...
11
votes
6answers
614 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 ...
40
votes
8answers
8k views

Defensive Programming vs Exception Handling?

I'm working through the book "Head First Python" (it's my language to learn this year) and I got to a section where they argue about two code techniques: Defensive coding vs Exception handling. Here ...
18
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1answer
1k 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
4answers
307 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. ...
14
votes
1answer
871 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 ...
1
vote
1answer
54 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 ...
3
votes
4answers
278 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, ...
9
votes
6answers
2k views

Maybe monad vs exceptions

I wonder what are the advantages of Maybe monad over exceptions? It looks like Maybe is just explicit (and rather space-consuming) way of try..catch syntax. update Please note that I'm intentionally ...
12
votes
5answers
579 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 ...
3
votes
2answers
123 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 ...
1
vote
2answers
129 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 ...
40
votes
7answers
26k views

Why use try … finally without a catch clause?

The classical way to program is with try / catch but when is it appropriate to use try without catch? In Python the following appears legal and can make sense: try: #do work finally: #do ...
7
votes
4answers
394 views

What are good ways of balancing informative exceptions and clean code?

With our public SDK, we tend to want to give very informative messages about why an exception occurs. For example: if (interfaceInstance == null) { string errMsg = string.Format( ...
2
votes
1answer
119 views

How to handle when one user deletes the object while the other has it opened in edit mode in a webapp?

I am developing a CRUD type web application. It is a project management system having projects, milestones, tasks, employees etc. Each employee has his/her own account to login and view the system. ...
3
votes
1answer
127 views

I have a unexceptional exception. That is thrown by a API used in my project. Is it standard to log errors like these or handle them without logging [duplicate]

The API has a Throttle on the number of requests you can make. So we queue our requests in a local database and make as many requests as possible until the "Throttle exception" is thrown. Upon ...
5
votes
3answers
719 views

Authoritative sources for exception handling best practices [closed]

My work place suffers from a bad case of the Pokemon Exception Handling anti-pattern with constructs like the following splattered across the code base: try { ... } catch (Exception ex) { // ...
38
votes
7answers
2k views

Are there legitimate reasons for returning exception objects instead of throwing them?

This question is intended to apply to any OO programming language that supports exception handling; I am using C# for illustrative purposes only. Exceptions are usually intended to be raised when an ...
6
votes
13answers
2k views

Should integer divide by zero halt execution? [closed]

I know that modern languages handle integer divide by zero as an error just like the hardware does, but what if we could design a whole new language? Ignoring existing hardware, what should a ...
2
votes
3answers
361 views

What code lays behind C++ exception?

In C and C++ you can return a single variable inside a function. Now in the case that variable is returning data, and not an error code, you can use exceptions. But how is that possible? If you data ...
2
votes
1answer
125 views

What are the guidelines for either throwing an exception or failing silently for nonvalid arguments? [duplicate]

If you look at XContainer.Add(object content) method you can see that id does not require content to be not null. It just does nothing in case of null. However List.AddRange(IEnumerable collection) ...
2
votes
1answer
323 views

Why would one transform a checked exception to an unchecked exception? [duplicate]

My buddy told me today that some programmers transform a checked exception (e.g. EJBException, SQLException...) to an unchecked (RuntimeException?) My buddy explained a call stack where if you change ...
1
vote
1answer
414 views

Can AspectJ or AOP in general be used to test exception handling?

I'm reading a book's chapter ("Controlled Exception Test" in "Testing Object-Oriented Testing") about testing exception handling in a running system (not at unit level). The conclusion is that it is ...
1
vote
2answers
138 views

Understanding unit testing for dynamically changing condition

I was trying to understand how to write unit tests for a few days now. I'm confused with following scenarios in the existing code. In first function the max value changes depending on the object ...
2
votes
2answers
285 views

We need a custom strategy for collecting unhandled application exceptions. What are our options?

"Unhandled exception" term In .NET Framework, unhandled exceptions are the exceptions which were not handled by the application itself, and result in a crash. In a case of a desktop application, it ...
6
votes
2answers
368 views

Where should I handle fatal exceptions

Suppose I have a controller that loads a file and hands it over to the processing. Should I handle the exception in the file loader and return Null if something is wrong, or should I throw the ...