org.apache.nifi.io.nio

Class BufferPool

java.lang.Object

org.apache.nifi.io.nio.BufferPool

All Implemented Interfaces:

Runnable

public class BufferPool
extends Object
implements Runnable

Field Summary

Fields

Modifier and Type	Field and Description
(package private) BlockingQueue<ByteBuffer>	bufferPool
(package private) double	lastRateSampleMBps
private Calendar	lastRateSampleTime
private long	lastTotalBytesExtracted
private static org.slf4j.Logger	LOGGER
(package private) double	maxRateMBps
private static double	ONE_MB
(package private) double	overallMBps
private Calendar	startTime
private long	totalBytesExtracted

Constructor Summary

Constructors

Constructor and Description
BufferPool(int bufferCount, int bufferCapacity, boolean allocateDirect, double maxRateMBps)

Method Summary

Modifier and Type	Method and Description
private void	computeRate()
static List<ByteBuffer>	createBuffers(int bufferCount, int bufferCapacity, boolean allocateDirect)
private void	logChannelReadRates()
ByteBuffer	poll()
boolean	returnBuffer(ByteBuffer buffer, int bytesProcessed) Returns the given buffer to the pool - and clears it.
void	run()
int	size()

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

private static final org.slf4j.Logger LOGGER

bufferPool

final BlockingQueue<ByteBuffer> bufferPool

ONE_MB

private static final double ONE_MB

See Also:

Constant Field Values

lastRateSampleTime

private Calendar lastRateSampleTime

startTime

private final Calendar startTime

lastRateSampleMBps

double lastRateSampleMBps

overallMBps

double overallMBps

totalBytesExtracted

private long totalBytesExtracted

lastTotalBytesExtracted

private long lastTotalBytesExtracted

maxRateMBps

final double maxRateMBps

Constructor Detail

BufferPool

public BufferPool(int bufferCount,
                  int bufferCapacity,
                  boolean allocateDirect,
                  double maxRateMBps)

Method Detail

returnBuffer

public boolean returnBuffer(ByteBuffer buffer,
                            int bytesProcessed)

Returns the given buffer to the pool - and clears it.

Parameters:

buffer - buffer to return

bytesProcessed - bytes processed for this buffer being returned

Returns:

true if buffer returned to pool

poll

public ByteBuffer poll()

size

public int size()

computeRate

private void computeRate()

createBuffers

public static List<ByteBuffer> createBuffers(int bufferCount,
                                             int bufferCapacity,
                                             boolean allocateDirect)

logChannelReadRates

private void logChannelReadRates()

run

public void run()

Specified by:

run in interface Runnable