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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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java.lang.Objectcom.tangosol.util.Base
com.tangosol.io.nio.AbstractBufferManager
public abstract class AbstractBufferManager
Provides a basic implementation of ByteBufferManager.
Constructor Summary | |
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protected |
AbstractBufferManager(int cbInitial,
int cbMaximum)
Construct a AbstractBufferManager that supports a buffer of a certain initial and maximum size. |
Method Summary | |
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protected abstract void |
allocateBuffer()
Allocate a new buffer, copying old data if there is any. |
protected void |
calibrate()
Determine the grow and shrink thresholds based on the current capacity. |
ByteBuffer |
getBuffer()
Get the current ByteBuffer reference. |
int |
getCapacity()
Get the capacity of the current ByteBuffer. |
int |
getGrowthThreshold()
Determine the level (what number of bytes used) above which the current ByteBuffer will need to be "resized" upwards. |
int |
getMaxCapacity()
Determine the maximum size that the managed buffer can reach. |
protected int |
getMaxIncrement()
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int |
getMinCapacity()
Determine the minimum size that the managed buffer can reach. |
int |
getShrinkageThreshold()
Determine the level (what number of bytes used) below which the current ByteBuffer will need to be "resized" downwards. |
void |
grow(int cbRequired)
Request that the buffer be grown based on the number of bytes currently required. |
protected void |
setBuffer(ByteBuffer buffer)
Set the current ByteBuffer reference. |
protected void |
setCapacity(int cb)
Set the capacity of the current ByteBuffer. |
protected void |
setGrowthThreshold(int cb)
Specify the level (what number of bytes used) above which the current ByteBuffer will need to be "resized" upwards. |
protected void |
setMaxCapacity(int cb)
Specify the maximum size that the managed buffer can reach. |
protected void |
setMinCapacity(int cb)
Specify the minimum size that the managed buffer can reach. |
protected void |
setShrinkageThreshold(int cb)
Specify the level (what number of bytes used) below which the current ByteBuffer will need to be "resized" downwards. |
void |
shrink(int cbRequired)
Request that the buffer be shrunk based on the number of bytes currently required. |
Constructor Detail |
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protected AbstractBufferManager(int cbInitial, int cbMaximum)
cbInitial
- the initial sizecbMaximum
- the maximum sizeMethod Detail |
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public ByteBuffer getBuffer()
getBuffer
in interface ByteBufferManager
protected void setBuffer(ByteBuffer buffer)
buffer
- the current ByteBufferpublic int getCapacity()
getBuffer().capacity()
.
getCapacity
in interface ByteBufferManager
protected void setCapacity(int cb)
cb
- the capacity of the managed ByteBufferpublic int getGrowthThreshold()
getGrowthThreshold
in interface ByteBufferManager
protected void setGrowthThreshold(int cb)
cb
- the number of bytes that, when the number of used bytes
exceeds it, the ByteBuffer will need to growpublic int getShrinkageThreshold()
getShrinkageThreshold
in interface ByteBufferManager
protected void setShrinkageThreshold(int cb)
cb
- the number of bytes that, when the number of used bytes
drops below it, the ByteBuffer will need to shrinkpublic int getMinCapacity()
getCapacity
.
getMinCapacity
in interface ByteBufferManager
protected void setMinCapacity(int cb)
cb
- minimum size for the managed bufferpublic int getMaxCapacity()
getCapacity
.
getMaxCapacity
in interface ByteBufferManager
protected void setMaxCapacity(int cb)
cb
- maximum size for the managed bufferprotected int getMaxIncrement()
public void grow(int cbRequired)
grow
in interface ByteBufferManager
cbRequired
- the number of bytes that are needed by the
requesting operationpublic void shrink(int cbRequired)
shrink
in interface ByteBufferManager
cbRequired
- the number of contiguous bytes in the buffer,
starting from offset 0, that are actually in useprotected void calibrate()
protected abstract void allocateBuffer()
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CoherenceTM v3.3 Copyright© 2000-2007 by Oracle Corporation |
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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |