org.apache.arrow.dataset.jni

Class NativeMemoryPool

java.lang.Object

org.apache.arrow.dataset.jni.NativeMemoryPool

All Implemented Interfaces:

AutoCloseable

public class NativeMemoryPool
extends Object
implements AutoCloseable

C++ memory pool(arrow::MemoryPool)'s Java mapped instance.

Method Summary

Modifier and Type	Method and Description
void	close()
static NativeMemoryPool	createListenable(ReservationListener listener) Create a listenable memory pool (see also: arrow::ReservationListenableMemoryPool) with a specific listener.
long	getBytesAllocated() Get current allocated bytes.
static NativeMemoryPool	getDefault() Get the default memory pool.
long	getNativeInstanceId() Return native instance ID of this memory pool.

Methods inherited from class java.lang.Object

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

Method Detail

getDefault

public static NativeMemoryPool getDefault()

Get the default memory pool. This will return arrow::default_memory_pool() directly.

createListenable

public static NativeMemoryPool createListenable(ReservationListener listener)

Create a listenable memory pool (see also: arrow::ReservationListenableMemoryPool) with a specific listener. All buffers created from the memory pool should take enough reservation from the listener in advance.

getNativeInstanceId

public long getNativeInstanceId()

Return native instance ID of this memory pool.

getBytesAllocated

public long getBytesAllocated()

Get current allocated bytes.

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception