[jira] [Commented] (HBASE-22005) Use ByteBuff's refcnt to track the life cycle of data block

[Zheng Hu (JIRA)]

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https://issues.apache.org/jira/browse/HBASE-22005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16787452#comment-16787452
 ] 

Zheng Hu commented on HBASE-22005:
----------------------------------

OK, [~ste...@apache.org],  Got your mind. Then I think we need an method in 
FSDataInputStream to known whether it support the ByteBufferReadable or not. 
Now I can only write an method like this to check, while I don't think it's 
efficient or good desgin.
{code}
  static boolean isByteBufferReadable(FSDataInputStream is) {
    InputStream cur = is.getWrappedStream();
    for (;;) {
      if ((cur instanceof FSDataInputStream)) {
        cur = ((FSDataInputStream) cur).getWrappedStream();
      } else {
        break;
      }
    }
    return cur instanceof ByteBufferReadable;
  }
{code}

> Use ByteBuff's refcnt to track the life cycle of data block
> -----------------------------------------------------------
>
>                 Key: HBASE-22005
>                 URL: https://issues.apache.org/jira/browse/HBASE-22005
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Zheng Hu
>            Assignee: Zheng Hu
>            Priority: Major
>         Attachments: HBASE-22005.HBASE-21879.v1.patch
>
>




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