org.apache.cassandra.utils.memory

## Class MemtableAllocator

- java.lang.Object
- - org.apache.cassandra.utils.memory.MemtableAllocator

- Direct Known Subclasses:
    MemtableBufferAllocator, NativeAllocator

      public abstract class MemtableAllocator
      extends java.lang.Object

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `MemtableAllocator.SubAllocator` Mark the BB as unused, permitting it to be reclaimed

  - ### Method Summary

    All Methods Instance Methods Abstract Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract DecoratedKey` | `clone(DecoratedKey key, OpOrder.Group opGroup)`
    `abstract EnsureOnHeap` | `ensureOnHeap()`
    `boolean` | `isLive()`
    `MemtableAllocator.SubAllocator` | `offHeap()`
    `MemtableAllocator.SubAllocator` | `onHeap()`
    `abstract Row.Builder` | `rowBuilder(OpOrder.Group opGroup)`
    `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 reclaiming; this will permit any outstanding allocations to temporarily overshoot the maximum memory limit so that flushing can begin immediately

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Method Detail

    - #### rowBuilder

          public abstract Row.Builder rowBuilder(OpOrder.Group opGroup)

    - #### clone

          public abstract DecoratedKey clone(DecoratedKey key,
                                             OpOrder.Group opGroup)

    - #### ensureOnHeap

          public abstract EnsureOnHeap ensureOnHeap()

    - #### onHeap

          public MemtableAllocator.SubAllocator onHeap()

    - #### offHeap

          public MemtableAllocator.SubAllocator offHeap()

    - #### setDiscarding

          public void setDiscarding()

      Mark this allocator reclaiming; this will permit any outstanding allocations to temporarily overshoot the maximum memory limit so that flushing can begin immediately

    - #### setDiscarded

          public void setDiscarded()

      Indicate the memory and resources owned by this allocator are no longer referenced, and can be reclaimed/reused.

    - #### isLive

          public boolean isLive()

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