org.jboss.netty.channel

类 AdaptiveReceiveBufferSizePredictor

java.lang.Object

org.jboss.netty.channel.AdaptiveReceiveBufferSizePredictor

所有已实现的接口:

ReceiveBufferSizePredictor

public class AdaptiveReceiveBufferSizePredictor
extends java.lang.Object
implements ReceiveBufferSizePredictor

The ReceiveBufferSizePredictor that automatically increases and decreases the predicted buffer size on feed back.

It gradually increases the expected number of readable bytes if the previous read fully filled the allocated buffer. It gradually decreases the expected number of readable bytes if the read operation was not able to fill a certain amount of the allocated buffer two times consecutively. Otherwise, it keeps returning the same prediction.

构造器概要

构造器

构造器和说明
AdaptiveReceiveBufferSizePredictor() Creates a new predictor with the default parameters.
AdaptiveReceiveBufferSizePredictor(int minimum, int initial, int maximum) Creates a new predictor with the specified parameters.

方法概要

方法

限定符和类型	方法和说明
int	nextReceiveBufferSize() Predicts the capacity of the ChannelBuffer for the next read operation depending on the actual number of read bytes in the previous read operation.
void	previousReceiveBufferSize(int previousReceiveBufferSize) Updates this predictor by specifying the actual number of read bytes in the previous read operation.

从类继承的方法 java.lang.Object

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

构造器详细资料

AdaptiveReceiveBufferSizePredictor

public AdaptiveReceiveBufferSizePredictor()

Creates a new predictor with the default parameters. With the default parameters, the expected buffer size starts from 1024, does not go down below 64, and does not go up above 65536.

AdaptiveReceiveBufferSizePredictor

public AdaptiveReceiveBufferSizePredictor(int minimum,
                                  int initial,
                                  int maximum)

Creates a new predictor with the specified parameters.

参数:

minimum - the inclusive lower bound of the expected buffer size

initial - the initial buffer size when no feed back was received

maximum - the inclusive upper bound of the expected buffer size

方法详细资料

nextReceiveBufferSize

public int nextReceiveBufferSize()

从接口复制的说明: ReceiveBufferSizePredictor

Predicts the capacity of the ChannelBuffer for the next read operation depending on the actual number of read bytes in the previous read operation.

指定者:

nextReceiveBufferSize 在接口中 ReceiveBufferSizePredictor

返回:

the expected number of readable bytes this time

previousReceiveBufferSize

public void previousReceiveBufferSize(int previousReceiveBufferSize)

从接口复制的说明: ReceiveBufferSizePredictor

Updates this predictor by specifying the actual number of read bytes in the previous read operation.

指定者:

previousReceiveBufferSize 在接口中 ReceiveBufferSizePredictor

参数:

previousReceiveBufferSize - the actual number of read bytes in the previous read operation