Package org.apache.hadoop.io.nativeio

Class NativeIO.POSIX.NoMlockCacheManipulator

java.lang.Object

org.apache.hadoop.io.nativeio.NativeIO.POSIX.CacheManipulator

org.apache.hadoop.io.nativeio.NativeIO.POSIX.NoMlockCacheManipulator

Enclosing class:

NativeIO.POSIX

@VisibleForTesting
public static class NativeIO.POSIX.NoMlockCacheManipulator
extends NativeIO.POSIX.CacheManipulator

A CacheManipulator used for testing which does not actually call mlock. This allows many tests to be run even when the operating system does not allow mlock, or only allows limited mlocking.

Constructor Summary

Constructors

Constructor	Description
NoMlockCacheManipulator()

Method Summary

Modifier and Type	Method	Description
long	getMemlockLimit()
long	getOperatingSystemPageSize()
void	mlock(String identifier, ByteBuffer buffer, long len)
boolean	verifyCanMlock()

Methods inherited from class org.apache.hadoop.io.nativeio.NativeIO.POSIX.CacheManipulator

posixFadviseIfPossible

Methods inherited from class java.lang.Object

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

Constructor Details

NoMlockCacheManipulator

public NoMlockCacheManipulator()

Method Details

mlock

public void mlock(String identifier,
 ByteBuffer buffer,
 long len)
           throws IOException

Overrides:

mlock in class NativeIO.POSIX.CacheManipulator

Throws:

IOException

getMemlockLimit

public long getMemlockLimit()

Overrides:

getMemlockLimit in class NativeIO.POSIX.CacheManipulator

getOperatingSystemPageSize

public long getOperatingSystemPageSize()

Overrides:

getOperatingSystemPageSize in class NativeIO.POSIX.CacheManipulator

verifyCanMlock

public boolean verifyCanMlock()

Overrides:

verifyCanMlock in class NativeIO.POSIX.CacheManipulator