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https://issues.apache.org/jira/browse/HBASE-18389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16096003#comment-16096003
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Xiang Li commented on HBASE-18389:
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It works as :
ClassSize has the following 2 public API for the users:
* sizeOf(byte[])
* sizeOfByteArray(int)
Both are the public interfaces to be called when the memory consumption of a
byte array is to be calculated. Callers only need to care about if it is the
whole byte array to calculate or a part of it
> Remove byte[] from formal parameter of sizeOf() of ClassSize,
> ClassSize.MemoryLayout and ClassSize.UnsafeLayout
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-18389
> URL: https://issues.apache.org/jira/browse/HBASE-18389
> Project: HBase
> Issue Type: Bug
> Components: util
> Reporter: Xiang Li
> Assignee: Xiang Li
> Priority: Minor
> Attachments: HBASE-18389.master.000.patch,
> HBASE-18389.master.001.patch, HBASE-18389.master.002.patch
>
>
> In ClassSize class and its internal static class, sizeOf() function has 2
> formal parameters: byte[] b and int len. But the function's internal logic
> does not use or refer to byte[] b. Could be removed.
> {code:title=hbase-common/src/main/java/org/apache/hadoop/hbase/util/ClassSize.java|borderStyle=solid}
> // Class of ClassSize
> public static long sizeOf(byte[] b, int len) {
> return memoryLayout.sizeOf(b, len);
> }
> // Class of ClassSize.MemoryLayout
> long sizeOf(byte[] b, int len) {
> return align(arrayHeaderSize() + len);
> }
> // Class of ClassSize.UnsafeLayout
> long sizeOf(byte[] b, int len) {
> return align(arrayHeaderSize() + len *
> UnsafeAccess.theUnsafe.ARRAY_BYTE_INDEX_SCALE);
> }
> {code}
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