com.orientechnologies.orient.core.storage.impl.local.paginated.wal

Class OWALSegmentCache

java.lang.Object

com.orientechnologies.orient.core.storage.impl.local.paginated.wal.OWALSegmentCache

public class OWALSegmentCache
extends Object

Write cache for the file which presents segment of WAL.

The last written pages will be cached so later they can be flushed by single batch. File will be closed if there will be no access to this cache during last N min.

Method Summary

Modifier and Type	Method and Description
void	close(boolean flush) Writes cache content to the file and closes it.
void	delete() Clears cache and deletes underlying file
long	filledUpTo()
void	open() Initializes cache and opens underlying file.
void	sync() Writes cache content to the file and performs fsync

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

sync

public void sync()
          throws IOException

Writes cache content to the file and performs fsync

Throws:

IOException

close

public void close(boolean flush)

Writes cache content to the file and closes it. Calls fsync if needed.

delete

public void delete()
            throws IOException

Clears cache and deletes underlying file

Throws:

IOException

open

public void open()
          throws IOException

Initializes cache and opens underlying file.

Throws:

IOException

filledUpTo

public long filledUpTo()
                throws IOException

Returns:

Size of file in the amount of pages

Throws:

IOException