com.github.akurilov.commons.system

Interface DirectMemUtil

public interface DirectMemUtil

Utility methods to work with direct (off-heap) memory

Field Summary

Fields

Modifier and Type	Field and Description
static int	REUSABLE_BUFF_SIZE_MAX
static int	REUSABLE_BUFF_SIZE_MIN
static java.lang.ThreadLocal<java.nio.MappedByteBuffer[]>	REUSABLE_BUFFS

Method Summary

Modifier and Type	Method and Description
static java.nio.MappedByteBuffer	getThreadLocalReusableBuff(long size) Selects the thread local direct byte buffer fitting the requested buffer size.

Field Detail

REUSABLE_BUFF_SIZE_MIN

static final int REUSABLE_BUFF_SIZE_MIN

See Also:

Constant Field Values

REUSABLE_BUFF_SIZE_MAX

static final int REUSABLE_BUFF_SIZE_MAX

See Also:

Constant Field Values

REUSABLE_BUFFS

static final java.lang.ThreadLocal<java.nio.MappedByteBuffer[]> REUSABLE_BUFFS

Method Detail

getThreadLocalReusableBuff

static java.nio.MappedByteBuffer getThreadLocalReusableBuff(long size)
                                                     throws java.lang.IllegalArgumentException

Selects the thread local direct byte buffer fitting the requested buffer size. Useful for I/O.

Parameters:

size - the requested buffer size

Returns:

the buffer which size may be in the range of REUSABLE_BUFF_SIZE_MIN and REUSABLE_BUFF_SIZE_MAX

Throws:

java.lang.IllegalArgumentException - if the requested size is less than 0