How to use

mergeTask

method

in

org.apache.lucene.index.PooledConcurrentMergeScheduler

@Override
public void merge( IndexWriter writer, MergeTrigger trigger, boolean newMergesFound )
    throws IOException
{
  while ( true )
  {
    MergePolicy.OneMerge merge = writer.getNextMerge();
    if ( merge == null )
    {
      return;
    }
    boolean success = false;
    try
    {
      MergeThread mergeThread = getMergeThread( writer, merge );
      writerTaskCounter.increment();
      PooledConcurrentMergePool.mergeThreadsPool.submit( mergeTask( mergeThread ) );
      success = true;
    }
    finally
    {
      if ( !success )
      {
        writer.mergeFinish( merge );
        writerTaskCounter.decrement();
      }
    }
  }
}