Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
The fact is that when you write code in modular fashion one part of your system cannot always know how to handle errors itself. In such cases the only thing you can do is pass error somewhere else and there are in general two ways to do it: exceptions and return codes. And exceptions is just a more robust way to do it.

Example: say you are implementing business logic for your application which has multiple frontends (CLI, web and GUI). This part of your application encounters an error (let say a database connection error). What should it do? Print HTML page with error? Produce plain text formated error message for CLI? Write something in the log? No, it is not responsiblity of this part of your system to do these things, it is responsiblity of the frontend part to handle this error. So you just raise an exception and let the frontend to handle it.

--
Ilya Martynov, ilya@iponweb.net
CTO IPonWEB (UK) Ltd
Quality Perl Programming and Unix Support UK managed @ offshore prices - http://www.iponweb.net
Personal website - http://martynov.org


In reply to Re: Re: Best Practices for Exception Handling by IlyaM
in thread Best Practices for Exception Handling by Ovid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    [choroba]: Isn't Using PerlPod Creatively rather a meditation?
    [choroba]: I don't see a question
    [1nickt]: ugh, I stuck my head in the bass bin for 30 seconds on a dare at Ted Nugent at Hammersmith Odeon. Yes, I am 40% deaf now.
    [johngg]: My daughter is incredibly jealous of my wife who got to see The Clash at Brixton many years ago. They went to see The Vaccines there recently.
    [1nickt]: But the bands are even louder! I saw Spearhead (Michael Franti) at an outdoor show and had to walk a mile away to not feel pain in my chest! Babies were crying ... I asked the sound engineer why it was necessary to have the bass so loud and he laughed...
    [Discipulus]: but the best i attended live was Mano Negra Patchanka at Forte Prenestino .. in 1990
    [Corion]: Hmmm - Mano Negra or at least Manu Chao seem to put on a good live show. At least the one live CD I have from Manu Chao sounds good ;)
    Discipulus feels the same jealousity of the johngg's daughter
    [1nickt]: choroba I agree
    [choroba]: Playing in a punk rock band for 20 years... my hearing is quite bad

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (13)
    As of 2017-03-24 12:17 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Should Pluto Get Its Planethood Back?



      Results (301 votes). Check out past polls.