org.apache.ignite.internal.processors.cache.persistence.freelist.io

Class PagesListNodeIO

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.tree.io.PageIO

org.apache.ignite.internal.processors.cache.persistence.freelist.io.PagesListNodeIO

public class PagesListNodeIO
extends PageIO

TODO optimize: now we have slow removePage(long, long)

Field Summary

Fields

Modifier and Type	Field and Description
static IOVersions<PagesListNodeIO>	VERSIONS

Fields inherited from class org.apache.ignite.internal.processors.cache.persistence.tree.io.PageIO

COMMON_HEADER_END, CRC_OFF, MAX_PAYLOAD_SIZE, PAGE_ID_OFF, T_BPLUS_META, T_CACHE_ID_AWARE_DATA_REF_INNER, T_CACHE_ID_AWARE_DATA_REF_LEAF, T_CACHE_ID_AWARE_PENDING_REF_INNER, T_CACHE_ID_AWARE_PENDING_REF_LEAF, T_DATA, T_DATA_REF_INNER, T_DATA_REF_LEAF, T_H2_EX_REF_INNER_END, T_H2_EX_REF_INNER_START, T_H2_EX_REF_LEAF_END, T_H2_EX_REF_LEAF_START, T_H2_REF_INNER, T_H2_REF_LEAF, T_META, T_METASTORE_INNER, T_METASTORE_LEAF, T_PAGE_LIST_META, T_PAGE_LIST_NODE, T_PAGE_UPDATE_TRACKING, T_PART_CNTRS, T_PART_META, T_PENDING_REF_INNER, T_PENDING_REF_LEAF, TYPE_OFF, VER_OFF

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PagesListNodeIO(int ver)

Method Summary

Methods

Modifier and Type	Method and Description
int	addPage(long pageAddr, long pageId, int pageSize) Adds page to the end of pages list.
int	getCount(long pageAddr) Gets total count of entries in this page.
long	getNextId(long pageAddr)
long	getPreviousId(long pageAddr)
void	initNewPage(long pageAddr, long pageId, int pageSize)
boolean	isEmpty(long pageAddr)
boolean	removePage(long pageAddr, long dataPageId) Removes the given page ID from the pages list.
void	setNextId(long pageAddr, long nextId)
void	setPreviousId(long pageAddr, long prevId)
long	takeAnyPage(long pageAddr) Removes any page from the pages list.

Methods inherited from class org.apache.ignite.internal.processors.cache.persistence.tree.io.PageIO

getBPlusIO, getBPlusIO, getCrc, getCrc, getInnerVersions, getLeafVersions, getPageId, getPageId, getPageIO, getPageIO, getType, getType, getType, getVersion, getVersion, getVersion, isDataPageType, registerH2, registerH2ExtraInner, registerH2ExtraLeaf, registerTest, setCrc, setCrc, setPageId, setType, toString

Methods inherited from class java.lang.Object

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

Field Detail

VERSIONS

public static final IOVersions<PagesListNodeIO> VERSIONS

Constructor Detail

PagesListNodeIO

protected PagesListNodeIO(int ver)

Parameters:

ver - Page format version.

Method Detail

initNewPage

public void initNewPage(long pageAddr,
               long pageId,
               int pageSize)

Overrides:

initNewPage in class PageIO

Parameters:

pageAddr - Page address.

pageId - Page ID.

pageSize - Page size.

getNextId

public long getNextId(long pageAddr)

Parameters:

pageAddr - Page address.

Returns:

Next page ID.

setNextId

public void setNextId(long pageAddr,
             long nextId)

Parameters:

pageAddr - Page address.

nextId - Next page ID.

getPreviousId

public long getPreviousId(long pageAddr)

Parameters:

pageAddr - Page address.

Returns:

Previous page ID.

setPreviousId

public void setPreviousId(long pageAddr,
                 long prevId)

Parameters:

pageAddr - Page address.

prevId - Previous page ID.

getCount

public int getCount(long pageAddr)

Gets total count of entries in this page. Does not change the buffer state.

Parameters:

pageAddr - Page address to get count from.

Returns:

Total number of entries.

addPage

public int addPage(long pageAddr,
          long pageId,
          int pageSize)

Adds page to the end of pages list.

Parameters:

pageAddr - Page address.

pageId - Page ID.

pageSize - Page size.

Returns:

Total number of items in this page.

takeAnyPage

public long takeAnyPage(long pageAddr)

Removes any page from the pages list.

Parameters:

pageAddr - Page address.

Returns:

Removed page ID.

removePage

public boolean removePage(long pageAddr,
                 long dataPageId)

Removes the given page ID from the pages list.

Parameters:

pageAddr - Page address.

dataPageId - Page ID to remove.

Returns:

true if page was in the list and was removed, false otherwise.

isEmpty

public boolean isEmpty(long pageAddr)

Parameters:

pageAddr - Page address.

Returns:

True if there are no items in this page.