HDFS-16137.Improve the comments related to FairCallQueue#queues. (#3226)
Co-authored-by: zhujianghua <zhujianghua@zhujianghuadeMacBook-Pro.local> Reviewed-by: Viraj Jasani <vjasani@apache.org>
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@ -25,6 +25,7 @@ import java.util.Collection;
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import java.util.Iterator;
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import java.util.AbstractQueue;
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import java.util.HashMap;
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import java.util.List;
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import java.util.concurrent.BlockingQueue;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.Semaphore;
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@ -58,8 +59,12 @@ public class FairCallQueue<E extends Schedulable> extends AbstractQueue<E>
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public static final Logger LOG = LoggerFactory.getLogger(FairCallQueue.class);
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/* The queues */
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private final ArrayList<BlockingQueue<E>> queues;
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/**
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* Save the queue data of multiple priority strategies.
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* Usually the number of queue data and priority strategies saved
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* is the same.
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*/
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private final List<BlockingQueue<E>> queues;
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/* Track available permits for scheduled objects. All methods that will
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* mutate a subqueue must acquire or release a permit on the semaphore.
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