org.apache.derby.impl.store.raw.data

Class PageCreationArgs

java.lang.Object

org.apache.derby.impl.store.raw.data.PageCreationArgs

class PageCreationArgs
extends java.lang.Object

This class holds information that is passed to CachedPage.createPage() and used when a page object (either a StoredPage or an AllocPage) is created.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	containerInfoSize Size of the container information stored in the AllocPage.
(package private) int	formatId Tells which type of page to create.
(package private) int	minimumRecordSize Minimum space to reserve for record portion length of row.
(package private) int	pageSize The size of the page in bytes.
(package private) int	spareSpace % of page to keep free for updates.
(package private) int	syncFlag Tells whether writes to this page should be synced.

Constructor Summary

Constructors

Constructor and Description
PageCreationArgs(int formatId, int syncFlag, int pageSize, int spareSpace, int minimumRecordSize, int containerInfoSize)

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

formatId

final int formatId

Tells which type of page to create. Either StoredPage.FORMAT_NUMBER or AllocPage.FORMAT_NUMBER.

syncFlag

final int syncFlag

Tells whether writes to this page should be synced. Should be CachedPage.WRITE_SYNC or CachedPage.WRITE_NO_SYNC, or 0 if the page is in a temporary container.

pageSize

final int pageSize

The size of the page in bytes.

spareSpace

final int spareSpace

% of page to keep free for updates. Not used for AllocPage.

minimumRecordSize

final int minimumRecordSize

Minimum space to reserve for record portion length of row.

containerInfoSize

final int containerInfoSize

Size of the container information stored in the AllocPage.

Constructor Detail

PageCreationArgs

PageCreationArgs(int formatId,
                 int syncFlag,
                 int pageSize,
                 int spareSpace,
                 int minimumRecordSize,
                 int containerInfoSize)