public class AdaptiveBufferSizePredictor extends java.lang.Object implements BufferSizePredictor
BufferSizePredictor that automatically increases and
decreases the predicted buffer size on feed back.
It gradually increases the expected number of bytes if the previous buffer fully filled the allocated buffer. It gradually decreases the expected number of 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. TODO: Object type hints could be useful at giving more type-specific predictions
| Constructor and Description |
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AdaptiveBufferSizePredictor()
Creates a new predictor with the default parameters.
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AdaptiveBufferSizePredictor(int minimum,
int initial,
int maximum)
Creates a new predictor with the specified parameters.
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| Modifier and Type | Method and Description |
|---|---|
int |
nextSize(java.lang.Object obj)
Provide the next buffer size taking in account
the object to store in the buffer.
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void |
recordSize(int previousSize)
Record the size of the of data in the last buffer used.
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public AdaptiveBufferSizePredictor()
512, does not
go down below 16, and does not go up above 65536.public AdaptiveBufferSizePredictor(int minimum,
int initial,
int maximum)
minimum - the inclusive lower bound of the expected buffer sizeinitial - the initial buffer size when no feed back was receivedmaximum - the inclusive upper bound of the expected buffer sizepublic int nextSize(java.lang.Object obj)
BufferSizePredictornextSize in interface BufferSizePredictorobj - instance that will be stored in the bufferpublic void recordSize(int previousSize)
BufferSizePredictorrecordSize in interface BufferSizePredictorpreviousSize - int representing the size of the last
object buffered.