org.gridgain.grid.util.offheap.unsafe

Class GridUnsafePartitionedMap

java.lang.Object

org.gridgain.grid.util.offheap.unsafe.GridUnsafePartitionedMap

All Implemented Interfaces:

GridOffHeapPartitionedMap

public class GridUnsafePartitionedMap
extends Object
implements GridOffHeapPartitionedMap

Off-heap map based on Unsafe implementation.

Constructor Summary

Constructors

Constructor and Description
GridUnsafePartitionedMap(int parts, int concurrency, float load, long initCap, long totalMem, short lruStripes, GridOffHeapEvictListener evictLsnr)

Method Summary

Methods

Modifier and Type	Method and Description
long	allocatedSize() Gets size of a memory allocated for map entries so far.
int	concurrency() Gets concurrency level for this map.
boolean	contains(int part, int hash, byte[] keyBytes) Checks if given key is contained in the map.
void	destruct() Destructs this map and deallocates all memory.
boolean	eventListener(GridOffHeapEventListener evtLsnr) Adds off-heap event listener.
boolean	evictListener(GridOffHeapEvictListener evictLsnr) Sets callback for when entries are evicted due to memory constraints.
long	freeSize() Gets available memory.
byte[]	get(int p, int hash, byte[] keyBytes) Gets value bytes for given key.
void	insert(int p, int hash, byte[] keyBytes, byte[] valBytes) Inserts new entry into the map without comparing if there is a mapping for given key already stored in map.
GridCloseableIterator<GridBiTuple<byte[],byte[]>>	iterator() Gets iterator over the whole map.
GridCloseableIterator<GridBiTuple<byte[],byte[]>>	iterator(int p) Gets iterator over certain partition.
float	loadFactor() Gets load factor of this map.
long	lruMemorySize() Gets memory size occupied by LRU queue.
long	lruSize() Gets number of elements in LRU queue.
short	lruStripes() Gets number of LRU stripes.
long	memorySize() Gets total available memory size.
int	partitions() Gets number of partitions.
boolean	put(int p, int hash, byte[] keyBytes, byte[] valBytes) Puts key and value bytes into the map potentially replacing existing entry.
byte[]	remove(int p, int hash, byte[] keyBytes) Removes value from off-heap map.
boolean	removex(int p, int hash, byte[] keyBytes) Removes value from off-heap map without returning it.
long	size() Gets number of elements in the map.
long	systemAllocatedSize() Gets memory allocated for map internal structure so far.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridUnsafePartitionedMap

public GridUnsafePartitionedMap(int parts,
                        int concurrency,
                        float load,
                        long initCap,
                        long totalMem,
                        short lruStripes,
                        @Nullable
                        GridOffHeapEvictListener evictLsnr)

Parameters:

parts - Partitions.

concurrency - Concurrency.

load - Load factor.

initCap - Initial capacity.

totalMem - Total memory.

lruStripes - LRU stripes.

evictLsnr - Eviction callback.

Method Detail

loadFactor

public float loadFactor()

Gets load factor of this map.

Specified by:

loadFactor in interface GridOffHeapPartitionedMap

Returns:

Load factor.

concurrency

public int concurrency()

Gets concurrency level for this map.

Specified by:

concurrency in interface GridOffHeapPartitionedMap

Returns:

Concurrency level.

partitions

public int partitions()

Gets number of partitions.

Specified by:

partitions in interface GridOffHeapPartitionedMap

Returns:

Number of partitions.

contains

public boolean contains(int part,
               int hash,
               byte[] keyBytes)

Checks if given key is contained in the map.

Specified by:

contains in interface GridOffHeapPartitionedMap

Parameters:

part - Partition.

hash - Hash.

keyBytes - Key bytes.

Returns:

True if key is contained in the map.

get

public byte[] get(int p,
         int hash,
         byte[] keyBytes)

Gets value bytes for given key.

Specified by:

get in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

hash - Hash.

keyBytes - Key bytes.

Returns:

Value bytes.

remove

public byte[] remove(int p,
            int hash,
            byte[] keyBytes)

Removes value from off-heap map.

Specified by:

remove in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

hash - Hash.

keyBytes - Key bytes.

Returns:

Removed value bytes.

removex

public boolean removex(int p,
              int hash,
              byte[] keyBytes)

Removes value from off-heap map without returning it.

Specified by:

removex in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

hash - Hash.

keyBytes - Key bytes.

Returns:

True if value was removed.

put

public boolean put(int p,
          int hash,
          byte[] keyBytes,
          byte[] valBytes)

Puts key and value bytes into the map potentially replacing existing entry.

Specified by:

put in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

hash - Hash.

keyBytes - Key bytes.

valBytes - Value bytes.

Returns:

True if new entry was created, false if existing value was updated.

insert

public void insert(int p,
          int hash,
          byte[] keyBytes,
          byte[] valBytes)

Inserts new entry into the map without comparing if there is a mapping for given key already stored in map.

Use with caution whenever certain that inserting a new value without current mapping.

Specified by:

insert in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

hash - Hash.

keyBytes - Key bytes.

valBytes - Value bytes.

size

public long size()

Gets number of elements in the map.

Specified by:

size in interface GridOffHeapPartitionedMap

Returns:

Number of elements in the map.

memorySize

public long memorySize()

Gets total available memory size.

Specified by:

memorySize in interface GridOffHeapPartitionedMap

Returns:

Memory size.

allocatedSize

public long allocatedSize()

Gets size of a memory allocated for map entries so far.

Specified by:

allocatedSize in interface GridOffHeapPartitionedMap

Returns:

Allocated memory size.

systemAllocatedSize

public long systemAllocatedSize()

Gets memory allocated for map internal structure so far.

Specified by:

systemAllocatedSize in interface GridOffHeapPartitionedMap

Returns:

Allocated memory.

freeSize

public long freeSize()

Gets available memory.

Specified by:

freeSize in interface GridOffHeapPartitionedMap

Returns:

Available memory.

eventListener

public boolean eventListener(GridOffHeapEventListener evtLsnr)

Adds off-heap event listener.

Specified by:

eventListener in interface GridOffHeapPartitionedMap

Parameters:

evtLsnr - Listener.

Returns:

True if event listener was added, false if another listener already exists.

evictListener

public boolean evictListener(GridOffHeapEvictListener evictLsnr)

Sets callback for when entries are evicted due to memory constraints. The parameter into closure is key bytes.

Specified by:

evictListener in interface GridOffHeapPartitionedMap

Parameters:

evictLsnr - Evict listener.

Returns:

True if evict listener was added, false if another listener already exists or LRU is disabled.

destruct

public void destruct()

Destructs this map and deallocates all memory.

Specified by:

destruct in interface GridOffHeapPartitionedMap

iterator

public GridCloseableIterator<GridBiTuple<byte[],byte[]>> iterator()

Gets iterator over the whole map.

Specified by:

iterator in interface GridOffHeapPartitionedMap

Returns:

Iterator over the whole map.

iterator

public GridCloseableIterator<GridBiTuple<byte[],byte[]>> iterator(int p)

Gets iterator over certain partition.

Specified by:

iterator in interface GridOffHeapPartitionedMap

Parameters:

p - Partition.

Returns:

Iterator over certain partition.

lruStripes

public short lruStripes()

Gets number of LRU stripes.

Returns:

Number of LRU stripes.

lruMemorySize

public long lruMemorySize()

Gets memory size occupied by LRU queue.

Returns:

Memory size occupied by LRU queue.

lruSize

public long lruSize()

Gets number of elements in LRU queue.

Returns:

Number of elements in LRU queue.