Github user taftster commented on the pull request:
https://github.com/apache/nifi/pull/202#issuecomment-179495566
1) StringBuilder should probably be preferred to StringBuffer in this case.
Though it probably won't matter for performance, the intention is that this is
the unsychronized (thread safe) usage.
2) I'm opting for readability over speed. What's wrong with something
like:
```
private static String createFakeUUID() {
return new StringBuilder()
.append("00000000-0000-0000-")
.append(String.format("%016x", id)
.insert(23, '-')
.toString();
}
```
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