@ManagedObject public class MappedByteBufferPool extends Object
A ByteBuffer pool where ByteBuffers are held in queues that are held in a Map.
Given a capacity factor
of 1024, the Map entry with key 1
holds a
queue of ByteBuffers each of capacity 1024, the Map entry with key 2
holds a
queue of ByteBuffers each of capacity 2048, and so on.
Modifier and Type | Class and Description |
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static class |
MappedByteBufferPool.Tagged |
ByteBufferPool.Bucket, ByteBufferPool.Lease
Constructor and Description |
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MappedByteBufferPool()
Creates a new MappedByteBufferPool with a default configuration.
|
MappedByteBufferPool(int factor)
Creates a new MappedByteBufferPool with the given capacity factor.
|
MappedByteBufferPool(int factor,
int maxQueueLength)
Creates a new MappedByteBufferPool with the given configuration.
|
MappedByteBufferPool(int factor,
int maxQueueLength,
Function<Integer,ByteBufferPool.Bucket> newBucket)
Creates a new MappedByteBufferPool with the given configuration.
|
MappedByteBufferPool(int factor,
int maxQueueLength,
Function<Integer,ByteBufferPool.Bucket> newBucket,
long maxHeapMemory,
long maxDirectMemory)
Creates a new MappedByteBufferPool with the given configuration.
|
Modifier and Type | Method and Description |
---|---|
ByteBuffer |
acquire(int size,
boolean direct)
Requests a
ByteBuffer of the given size. |
void |
clear() |
long |
getDirectByteBufferCount() |
long |
getDirectMemory() |
long |
getHeapByteBufferCount() |
long |
getHeapMemory() |
long |
getMemory(boolean direct) |
void |
release(ByteBuffer buffer)
Returns a
ByteBuffer , usually obtained with ByteBufferPool.acquire(int, boolean)
(but not necessarily), making it available for recycling and reuse. |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
newByteBuffer
public MappedByteBufferPool()
public MappedByteBufferPool(int factor)
factor
- the capacity factorpublic MappedByteBufferPool(int factor, int maxQueueLength)
factor
- the capacity factormaxQueueLength
- the maximum ByteBuffer queue lengthpublic MappedByteBufferPool(int factor, int maxQueueLength, Function<Integer,ByteBufferPool.Bucket> newBucket)
factor
- the capacity factormaxQueueLength
- the maximum ByteBuffer queue lengthnewBucket
- the function that creates a Bucketpublic MappedByteBufferPool(int factor, int maxQueueLength, Function<Integer,ByteBufferPool.Bucket> newBucket, long maxHeapMemory, long maxDirectMemory)
factor
- the capacity factormaxQueueLength
- the maximum ByteBuffer queue lengthnewBucket
- the function that creates a BucketmaxHeapMemory
- the max heap memory in bytesmaxDirectMemory
- the max direct memory in bytespublic ByteBuffer acquire(int size, boolean direct)
ByteBufferPool
Requests a ByteBuffer
of the given size.
The returned buffer may have a bigger capacity than the size being requested but it will have the limit set to the given size.
size
- the size of the bufferdirect
- whether the buffer must be direct or notByteBufferPool.release(ByteBuffer)
public void release(ByteBuffer buffer)
ByteBufferPool
Returns a ByteBuffer
, usually obtained with ByteBufferPool.acquire(int, boolean)
(but not necessarily), making it available for recycling and reuse.
buffer
- the buffer to returnByteBufferPool.acquire(int, boolean)
public void clear()
@ManagedAttribute(value="The number of pooled direct ByteBuffers") public long getDirectByteBufferCount()
@ManagedAttribute(value="The number of pooled heap ByteBuffers") public long getHeapByteBufferCount()
@ManagedAttribute(value="The bytes retained by direct ByteBuffers") public long getDirectMemory()
@ManagedAttribute(value="The bytes retained by heap ByteBuffers") public long getHeapMemory()
public long getMemory(boolean direct)
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