org.jboss.netty.channel

接口 ReceiveBufferSizePredictor

所有已知实现类:

AdaptiveReceiveBufferSizePredictor, FixedReceiveBufferSizePredictor

public interface ReceiveBufferSizePredictor

Predicts the number of readable bytes in the receive buffer of a Channel.

It calculates the close-to-optimal capacity of the ChannelBuffer for the next read operation depending on the actual number of read bytes in the previous read operation. More accurate the prediction is, more effective the memory utilization will be.

Once a read operation is performed and the actual number of read bytes is known, an I/O thread will call previousReceiveBufferSize(int) to update the predictor so it can predict more accurately next time.

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.

方法详细资料

nextReceiveBufferSize

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.

返回:

the expected number of readable bytes this time

previousReceiveBufferSize

void previousReceiveBufferSize(int previousReceiveBufferSize)

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

参数:

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