PoolAllocator (apache-cassandra API)

java.lang.Object
- org.apache.cassandra.utils.memory.AbstractAllocator
- - org.apache.cassandra.utils.memory.PoolAllocator<P>

public abstract class PoolAllocator<P extends Pool>
extends AbstractAllocator

Fields
Modifier and Type	Field and Description
`P`	`pool`

Methods
Modifier and Type	Method and Description
`abstract java.nio.ByteBuffer`	`allocate(int size, OpOrder.Group opGroup)`
`java.nio.ByteBuffer`	`clone(java.nio.ByteBuffer buffer, OpOrder.Group opGroup)` Allocate a slice of the given length.
`abstract void`	`free(java.nio.ByteBuffer name)` Mark the BB as unused, permitting it to be reclaimed
`boolean`	`isLive()`
`protected void`	`markAllocated(int size, OpOrder.Group opGroup)`
`float`	`ownershipRatio()`
`long`	`owns()`
`long`	`reclaiming()`
`void`	`setDiscarded()` Indicate the memory and resources owned by this allocator are no longer referenced, and can be reclaimed/reused.
`void`	`setDiscarding()` Mark this allocator as reclaiming; this will mark the memory it owns as reclaiming, so remove it from any calculation deciding if further cleaning/reclamation is necessary.
`ContextAllocator`	`wrap(OpOrder.Group opGroup, ColumnFamilyStore cfs)`

Methods inherited from class org.apache.cassandra.utils.memory.AbstractAllocator
allocate, clone

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

setDiscarding
```
public void setDiscarding()
```
Mark this allocator as reclaiming; this will mark the memory it owns as reclaiming, so remove it from any calculation deciding if further cleaning/reclamation is necessary.

setDiscarded
```
public void setDiscarded()
```
Indicate the memory and resources owned by this allocator are no longer referenced, and can be reclaimed/reused.

public abstract java.nio.ByteBuffer allocate(int size,
                           OpOrder.Group opGroup)

free
```
public abstract void free(java.nio.ByteBuffer name)
```
Mark the BB as unused, permitting it to be reclaimed

protected void markAllocated(int size,
                 OpOrder.Group opGroup)

public java.nio.ByteBuffer clone(java.nio.ByteBuffer buffer,
                        OpOrder.Group opGroup)

Allocate a slice of the given length.

public ContextAllocator wrap(OpOrder.Group opGroup,
                    ColumnFamilyStore cfs)

Class PoolAllocator<P extends Pool>