Julien Nioche created NUTCH-1747:
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Summary: Use AtomicInteger as semaphore in Fetcher
Key: NUTCH-1747
URL: https://issues.apache.org/jira/browse/NUTCH-1747
Project: Nutch
Issue Type: Improvement
Components: fetcher
Affects Versions: 1.8
Reporter: Julien Nioche
Priority: Minor
In Fetcher we currently use
Set<FetchItem> inProgress = Collections.synchronizedSet(new
HashSet<FetchItem>());
as semaphore within the FetchItemQueues to keep track of the URLs being fetched
and prevent threads from pulling from them. It works fine but we could use
AtomicIntegers instead as all we need is the counts, not the contents.
This change would have little impact on the performance but would make the code
a bit cleaner.
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