Package org.apache.lucene.util

Class RecyclingIntBlockAllocator

java.lang.Object

org.apache.lucene.util.IntBlockPool.Allocator

org.apache.lucene.util.RecyclingIntBlockAllocator

public final class RecyclingIntBlockAllocator
extends IntBlockPool.Allocator

A IntBlockPool.Allocator implementation that recycles unused int blocks in a buffer and reuses them in subsequent calls to getIntBlock().

Note: This class is not thread-safe

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_BUFFERED_BLOCKS

Constructor Summary

Constructors

Constructor	Description
RecyclingIntBlockAllocator()	Creates a new RecyclingIntBlockAllocator with a block size of IntBlockPool.INT_BLOCK_SIZE, upper buffered docs limit of DEFAULT_BUFFERED_BLOCKS (64).
RecyclingIntBlockAllocator(int blockSize, int maxBufferedBlocks)	Creates a new RecyclingIntBlockAllocator.
RecyclingIntBlockAllocator(int blockSize, int maxBufferedBlocks, Counter bytesUsed)	Creates a new RecyclingIntBlockAllocator

Method Summary

Modifier and Type	Method	Description
long	bytesUsed()
int	freeBlocks(int num)	Removes the given number of int blocks from the buffer if possible.
int[]	getIntBlock()
int	maxBufferedBlocks()
int	numBufferedBlocks()
void	recycleIntBlocks(int[][] blocks, int start, int end)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFERED_BLOCKS

public static final int DEFAULT_BUFFERED_BLOCKS

See Also:

Constant Field Values

Constructor Detail

RecyclingIntBlockAllocator

public RecyclingIntBlockAllocator(int blockSize,
                                  int maxBufferedBlocks,
                                  Counter bytesUsed)

Creates a new RecyclingIntBlockAllocator

Parameters:

blockSize - the block size in bytes

maxBufferedBlocks - maximum number of buffered int block

bytesUsed - Counter reference counting internally allocated bytes

RecyclingIntBlockAllocator

public RecyclingIntBlockAllocator(int blockSize,
                                  int maxBufferedBlocks)

Creates a new RecyclingIntBlockAllocator.

Parameters:

blockSize - the size of each block returned by this allocator

maxBufferedBlocks - maximum number of buffered int blocks

RecyclingIntBlockAllocator

public RecyclingIntBlockAllocator()

Creates a new RecyclingIntBlockAllocator with a block size of IntBlockPool.INT_BLOCK_SIZE, upper buffered docs limit of DEFAULT_BUFFERED_BLOCKS (64).

Method Detail

getIntBlock

public int[] getIntBlock()

Overrides:

getIntBlock in class IntBlockPool.Allocator

recycleIntBlocks

public void recycleIntBlocks(int[][] blocks,
                             int start,
                             int end)

Specified by:

recycleIntBlocks in class IntBlockPool.Allocator

numBufferedBlocks

public int numBufferedBlocks()

Returns:

the number of currently buffered blocks

bytesUsed

public long bytesUsed()

Returns:

the number of bytes currently allocated by this IntBlockPool.Allocator

maxBufferedBlocks

public int maxBufferedBlocks()

Returns:

the maximum number of buffered byte blocks

freeBlocks

public int freeBlocks(int num)

Removes the given number of int blocks from the buffer if possible.

Parameters:

num - the number of int blocks to remove

Returns:

the number of actually removed buffers