Package org.jboss.netty.channel
Interface ReceiveBufferSizePredictor
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- All Known Implementing Classes:
AdaptiveReceiveBufferSizePredictor
,FixedReceiveBufferSizePredictor
public interface ReceiveBufferSizePredictor
Predicts the number of readable bytes in the receive buffer of aChannel
.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.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description int
nextReceiveBufferSize()
Predicts the capacity of theChannelBuffer
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.
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Method Detail
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nextReceiveBufferSize
int nextReceiveBufferSize()
Predicts the capacity of theChannelBuffer
for the next read operation depending on the actual number of read bytes in the previous read operation.- Returns:
- the expected number of readable bytes this time
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previousReceiveBufferSize
void previousReceiveBufferSize(int previousReceiveBufferSize)
Updates this predictor by specifying the actual number of read bytes in the previous read operation.- Parameters:
previousReceiveBufferSize
- the actual number of read bytes in the previous read operation
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