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

Class CASWALPage

java.lang.Object

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

public final class CASWALPage
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_MAX_RECORD_SIZE
static final int	DEFAULT_PAGE_SIZE
static final int	LAST_OPERATION_ID_OFFSET	Offset of position which stores operation id of the last record in the page
static final long	MAGIC_NUMBER
static final int	MAGIC_NUMBER_OFFSET	Offset of magic number value.
static final long	MAGIC_NUMBER_WITH_ENCRYPTION
static final int	PAGE_SIZE_OFFSET
static final int	RECORDS_OFFSET
static final int	XX_OFFSET	Offset of position which stores XX_HASH value of content stored on this page.

Constructor Summary

Constructors

Constructor	Description
CASWALPage()

Method Summary

Modifier and Type	Method	Description
static int	calculateSerializedSize(int recordSize)	Calculates how much space record will consume once it will be stored inside of page.

Methods inherited from class java.lang.Object

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

Field Details

MAGIC_NUMBER

public static final long MAGIC_NUMBER

See Also:

• Constant Field Values

MAGIC_NUMBER_WITH_ENCRYPTION

public static final long MAGIC_NUMBER_WITH_ENCRYPTION

See Also:

• Constant Field Values

MAGIC_NUMBER_OFFSET

public static final int MAGIC_NUMBER_OFFSET

Offset of magic number value. Randomly generated constant which is used to identify whether page is broken on disk and version of binary format is used to store page.

See Also:

• Constant Field Values

XX_OFFSET

public static final int XX_OFFSET

Offset of position which stores XX_HASH value of content stored on this page.

See Also:

• Constant Field Values

LAST_OPERATION_ID_OFFSET

public static final int LAST_OPERATION_ID_OFFSET

Offset of position which stores operation id of the last record in the page

See Also:

• Constant Field Values

PAGE_SIZE_OFFSET

public static final int PAGE_SIZE_OFFSET

See Also:

• Constant Field Values

DEFAULT_PAGE_SIZE

public static final int DEFAULT_PAGE_SIZE

See Also:

• Constant Field Values

RECORDS_OFFSET

public static final int RECORDS_OFFSET

See Also:

• Constant Field Values

DEFAULT_MAX_RECORD_SIZE

public static final int DEFAULT_MAX_RECORD_SIZE

See Also:

• Constant Field Values

Constructor Details

CASWALPage

public CASWALPage()

Method Details

calculateSerializedSize

public static int calculateSerializedSize(int recordSize)

Calculates how much space record will consume once it will be stored inside of page. Sizes are different because once record is stored inside of the page, it is wrapped by additional system information.