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

Class PagesList.PagesCache

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.freelist.PagesList.PagesCache

Enclosing class:

PagesList

public static class PagesList.PagesCache
extends Object

Class to store page-list cache onheap.

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD
static int	DFLT_PAGES_LIST_CACHING_MAX_CACHE_SIZE
static int	DFLT_PAGES_LIST_CACHING_STRIPES_COUNT
static String	IGNITE_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD
static String	IGNITE_PAGES_LIST_CACHING_MAX_CACHE_SIZE
static String	IGNITE_PAGES_LIST_CACHING_STRIPES_COUNT

Constructor Summary

Constructors

Constructor and Description
PagesCache(@Nullable AtomicLong pagesCacheLimit) Default constructor.

Method Summary

Modifier and Type	Method and Description
boolean	add(long pageId) Add pageId to the tail of the list.
GridLongList	flush() Flush all stripes to one list and clear stripes.
long	poll() Poll next page from the list.
boolean	removePage(long pageId) Remove page from the list.
int	size() Cache size.

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_PAGES_LIST_CACHING_MAX_CACHE_SIZE

public static final int DFLT_PAGES_LIST_CACHING_MAX_CACHE_SIZE

See Also:

IGNITE_PAGES_LIST_CACHING_MAX_CACHE_SIZE, Constant Field Values

DFLT_PAGES_LIST_CACHING_STRIPES_COUNT

public static final int DFLT_PAGES_LIST_CACHING_STRIPES_COUNT

See Also:

IGNITE_PAGES_LIST_CACHING_STRIPES_COUNT, Constant Field Values

DFLT_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD

public static final int DFLT_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD

See Also:

IGNITE_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD, Constant Field Values

IGNITE_PAGES_LIST_CACHING_MAX_CACHE_SIZE

@SystemProperty(value="Pages cache maximum size",
                type=java.lang.Long.class,
                defaults="64")
public static final String IGNITE_PAGES_LIST_CACHING_MAX_CACHE_SIZE

See Also:

Constant Field Values

IGNITE_PAGES_LIST_CACHING_STRIPES_COUNT

@SystemProperty(value="Stripes count. Must be power of 2",
                type=java.lang.Long.class,
                defaults="4")
public static final String IGNITE_PAGES_LIST_CACHING_STRIPES_COUNT

See Also:

Constant Field Values

IGNITE_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD

@SystemProperty(value="The threshold of flush calls on empty caches to allow GC of stripes (the flush is triggered two times per checkpoint)",
                type=java.lang.Long.class,
                defaults="10")
public static final String IGNITE_PAGES_LIST_CACHING_EMPTY_FLUSH_GC_THRESHOLD

See Also:

Constant Field Values

Constructor Detail

PagesCache

public PagesCache(@Nullable
                  @Nullable AtomicLong pagesCacheLimit)

Default constructor.

Method Detail

removePage

public boolean removePage(long pageId)

Remove page from the list.

Parameters:

pageId - Page id.

Returns:

True if page was found and succesfully removed, false if page not found.

poll

public long poll()

Poll next page from the list.

Returns:

pageId.

flush

public GridLongList flush()

Flush all stripes to one list and clear stripes.

add

public boolean add(long pageId)

Add pageId to the tail of the list.

Parameters:

pageId - Page id.

Returns:

True if page can be added, false if list is full.

size

public int size()

Cache size.