[GitHub] [hive] belugabehr edited a comment on pull request #1275: HIVE-23324: Parallelise compaction directory cleaning process

[GitBox <gi...@apache.org>]

belugabehr edited a comment on pull request #1275:
URL: https://github.com/apache/hive/pull/1275#issuecomment-662082780


   Void type:
   
   ```
     public static void main(String[] args) throws IOException
     {
   
       ExecutorService service = Executors.newFixedThreadPool(2);
       CompletionService<Void> completionService = new ExecutorCompletionService<>(service);
   
       for (int i = 0; i < 10; i++)
       {
         final int t = i;
         completionService.submit(() -> {
           clean("File" + t);
           return null;
         });
       }
   
       for (int i = 0; i < 10; ++i) {
         try {
             completionService.take().get();
         } catch (Exception ignore) {}
     }
     }
   
     public static String clean(String path)
     {
       return "Cleaned: " + path;
     }
   ```


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