Challenge.java

class Challenge {

  private static final Logger log = LoggerFactory.getLogger(Challenge.class);

  private void doSomething(Collection<String> words) {
    log.debug("doing work on " + Joiner.on(";").join(words));
    doWork(words);
  }

 // 
  private void doSomething_naiveSolution(Collection<String> words) {
    if (log.isDebugEnabled()) {
      log.debug("doing work on " + Joiner.on(";").join(words));
    }
    doWork(words);
  }  


  private void doWork(Collection<String> words) {
  // ...
  }
}

can you tweak the code so joiner will be invoked only when needed (as most of the time logger level is Info) ?
I'm looking for something like the doSomething_naiveSolution, but a cleaner one.

Do you find this position http://thoughtstostring.wordpress.com/2013/06/02/looking-for-an-outstanding-software-engineer/ interesting ? Can you solve this challenge ? contact me via twitter https://twitter.com/yonatanm or drop your CV via mail - yonatan [at] outbrain [dot] com.

Good luck