debugjavaMinor
Proper action when a Java program fails
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failsprogramjavaactionwhenproper
Problem
I have a program that has to initialize a few big things (connect to a few databases, parse some XML) and without the initialization being successful the program would not be able to continue.
Right now I have my main method throwing just a general Exception
My question is, is there a better way to handle this? Should I catch the exception and then print out that it failed an exit? Something else maybe? Note, there's no hope of program recovery at this point.
Right now I have my main method throwing just a general Exception
public static void main(String[] args) throws Exception
{
//Throws numerous types of Exceptions
WhateverObject we = WhateverObject.getInstance();
we.doSomething();
}My question is, is there a better way to handle this? Should I catch the exception and then print out that it failed an exit? Something else maybe? Note, there's no hope of program recovery at this point.
Solution
-
What would the users like? It's usually an error message and a log file with the details and stacktraces for bug reports/support calls/debugging. You can throw exceptions out from
-
Please note that singleton nowadays is rather an antipattern. (
What would the users like? It's usually an error message and a log file with the details and stacktraces for bug reports/support calls/debugging. You can throw exceptions out from
main but it's not user-friendly (unless the users are the people who develop the software).-
Please note that singleton nowadays is rather an antipattern. (
WhateverObject.getInstance() looks like a singleton.) They make testing harder and often hide dependencies which leads to spaghetti code which is really hard to work with.- What is so bad about singletons?
- TotT: Using Dependency Injection to Avoid Singletons
- Eliminating static helper classes
- The Singleton Pattern
Context
StackExchange Code Review Q#44690, answer score: 2
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