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java.lang.Object de.lmu.ifi.dbs.elki.persistent.AbstractPageFile<P>
P
- page typepublic abstract class AbstractPageFile<P extends Page>
Abstract base class for the page file API for both caches and true page files (in-memory and on-disk).
Field Summary | |
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protected long |
readAccess
The read I/O-Access of this file. |
protected long |
writeAccess
The write I/O-Access of this file. |
Constructor Summary | |
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AbstractPageFile()
Constructor. |
Method Summary | |
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void |
close()
Closes this file. |
long |
getReadOperations()
Returns the read I/O-Accesses of this file. |
long |
getWriteOperations()
Returns the write I/O-Accesses of this file. |
void |
resetPageAccess()
Resets the counters for page accesses of this file and flushes the cache. |
protected abstract void |
writePage(Integer pageid,
P page)
Perform the actual page write operation. |
int |
writePage(P page)
Writes a page into this file. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface de.lmu.ifi.dbs.elki.persistent.PageFile |
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clear, deletePage, getNextPageID, getPageSize, initialize, readPage, setNextPageID, setPageID |
Methods inherited from interface de.lmu.ifi.dbs.elki.persistent.PageFileStatistics |
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getInnerStatistics |
Field Detail |
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protected long readAccess
protected long writeAccess
Constructor Detail |
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public AbstractPageFile()
Method Detail |
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public final int writePage(P page)
writePage
in interface PageFile<P extends Page>
page
- the page to be written
protected abstract void writePage(Integer pageid, P page)
pageid
- Page idpage
- Page to writepublic void close()
PageFile
close
in interface PageFile<P extends Page>
public final long getReadOperations()
PageFileStatistics
getReadOperations
in interface PageFileStatistics
public final long getWriteOperations()
PageFileStatistics
getWriteOperations
in interface PageFileStatistics
public final void resetPageAccess()
PageFileStatistics
resetPageAccess
in interface PageFileStatistics
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