com.orientechnologies.orient.core.storage.index.sbtree.local

Class OSBTreeValuePage

java.lang.Object

com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

com.orientechnologies.orient.core.storage.index.sbtree.local.OSBTreeValuePage

public class OSBTreeValuePage
extends ODurablePage

This page will contain value if it exceeds value limit for SBTree. Value is stored as list of linked pages. Following format is used.

1. Next free list page index, or -1 if page is filled by value. 8 bytes.
2. Whole value size. 4 bytes.
3. Size for current page - 4 bytes.
4. Next page which contains next portion of data. 8 bytes.
5. Serialized value presentation.

!!! This functionality should be removed after new sbtree based ridbag will be implemented, because it doest not make any sense to keep it, it will provide performance degradation only !!!!!!

Since:

9/27/13

Author:

Andrey Lomakin (a.lomakin-at-orientdb.com)

Field Summary

Fields

Modifier and Type	Field and Description
static int	MAX_BINARY_VALUE_SIZE

Fields inherited from class com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

CRC32_OFFSET, MAGIC_NUMBER_OFFSET, MAX_PAGE_SIZE_BYTES, NEXT_FREE_POSITION, WAL_POSITION_OFFSET, WAL_SEGMENT_OFFSET

Constructor Summary

Constructors

Constructor and Description
OSBTreeValuePage(OCacheEntry cacheEntry, boolean isNew)

Method Summary

Modifier and Type	Method and Description
static int	calculateAmountOfPage(int contentSize)
int	fillBinaryContent(byte[] data, int offset)
long	getNextFreeListPage()
long	getNextPage()
int	getSize()
int	readBinaryContent(byte[] data, int offset)
void	setNextFreeListPage(long pageIndex)
void	setNextPage(long nextPage)

Methods inherited from class com.orientechnologies.orient.core.storage.impl.local.paginated.base.ODurablePage

deserializeFromDirectMemory, getBinaryValue, getByteValue, getChanges, getIntValue, getLogSequenceNumber, getLogSequenceNumberFromPage, getLongValue, getLsn, getObjectSizeInDirectMemory, getPageData, getShortValue, moveData, restoreChanges, setBinaryValue, setByteValue, setIntValue, setLongValue, setLsn, setShortValue, toString

Methods inherited from class java.lang.Object

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

Field Detail

MAX_BINARY_VALUE_SIZE

public static final int MAX_BINARY_VALUE_SIZE

Constructor Detail

OSBTreeValuePage

public OSBTreeValuePage(OCacheEntry cacheEntry,
                        boolean isNew)
                 throws IOException

Throws:

IOException

Method Detail

setNextPage

public void setNextPage(long nextPage)
                 throws IOException

Throws:

IOException

getSize

public int getSize()

fillBinaryContent

public int fillBinaryContent(byte[] data,
                             int offset)
                      throws IOException

Throws:

IOException

readBinaryContent

public int readBinaryContent(byte[] data,
                             int offset)
                      throws IOException

Throws:

IOException

getNextPage

public long getNextPage()

setNextFreeListPage

public void setNextFreeListPage(long pageIndex)
                         throws IOException

Throws:

IOException

getNextFreeListPage

public long getNextFreeListPage()

calculateAmountOfPage

public static int calculateAmountOfPage(int contentSize)