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I was told to propagate all exceptions. This sentence means active propagation such like :

public void doSomething() throws SomeException{

try{ doSomethingThatCanThrowException(); } catch (SomeException e){ e.addContextInformation(�more info�); throw e; //throw e, or wrap it � see next line. //throw new WrappingException(e, �more information�); }

or passive propagation :

public void doSomething() throws SomeException {

try{ doSomethingThatCanThrowException(); } finally { //clean up � close open resources etc. }

}

.Also what does propagating all exception mean ?

Cheers

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    It means don't catch it, but throw it. Commented Dec 25, 2018 at 12:53
  • So propogating exception mean only to catch it. I should avoid catching it Commented Dec 25, 2018 at 13:02
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    Catching an exception is a promise: "Whatever caused this exception, my method can fulfill its job even in this exceptional case, so my caller need not be informed about the problem." That's a tough promise, so you better let exceptions propagate to your caller. And if you don't have resources that really need closing, you can go completely without try/catch/finally, just declaring a throws clause for your method. Commented Dec 25, 2018 at 13:33
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