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

Class PartitionAllocationMap

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.partstate.PartitionAllocationMap

public class PartitionAllocationMap
extends Object

Information structure with partitions state. Page counts map.

Constructor Summary

Constructors

Constructor and Description
PartitionAllocationMap()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	containsKey(GroupPartitionId key)
static GroupPartitionId	createCachePartId(FullPageId fullId) Extracts partition information from full page ID
Set<Map.Entry<GroupPartitionId,PagesAllocationRange>>	entrySet()
GroupPartitionId	firstKey()
PagesAllocationRange	get(GroupPartitionId key) Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.
boolean	isEmpty()
Set<GroupPartitionId>	keySet()
GroupPartitionId	nextKey(GroupPartitionId key) Returns next (higher) key for provided cache and partition or null
PagesAllocationRange	put(GroupPartitionId key, PagesAllocationRange val)
int	size()
Iterable<PagesAllocationRange>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

PartitionAllocationMap

public PartitionAllocationMap()

Method Detail

get

@Nullable
public PagesAllocationRange get(GroupPartitionId key)

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

Parameters:

key - to get

Returns:

value or null

createCachePartId

@NotNull
public static GroupPartitionId createCachePartId(@NotNull
                                         FullPageId fullId)

Extracts partition information from full page ID

Parameters:

fullId - page related to some cache

Returns:

pair of cache ID and partition ID

isEmpty

public boolean isEmpty()

Returns:

true if this map contains no key-value mappings

size

public int size()

Returns:

the number of key-value mappings in this map.

keySet

public Set<GroupPartitionId> keySet()

Returns:

keys (all caches partitions)

values

public Iterable<PagesAllocationRange> values()

Returns:

values (allocation ranges)

firstKey

public GroupPartitionId firstKey()

Returns:

Returns the first (lowest) key currently in this map.

nextKey

@Nullable
public GroupPartitionId nextKey(@NotNull
                                GroupPartitionId key)

Returns next (higher) key for provided cache and partition or null

Parameters:

key - cache and partition to search

Returns:

first found key which is greater than provided

entrySet

public Set<Map.Entry<GroupPartitionId,PagesAllocationRange>> entrySet()

Returns:

set view of the mappings contained in this map, sorted in ascending key order

containsKey

public boolean containsKey(GroupPartitionId key)

Returns:

true if this map contains a mapping for the specified key

put

public PagesAllocationRange put(GroupPartitionId key,
                       PagesAllocationRange val)

Parameters:

key - key with which the specified value is to be associated

val - value to be associated with the specified key

Returns:

the previous value associated with key, or null if there was no mapping for key.