com.orientechnologies.common.jnr

Class ONative

java.lang.Object

com.orientechnologies.common.jnr.ONative

public class ONative
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ONative.MemoryLimitResult

Field Summary

Fields

Modifier and Type	Field and Description
static int	MCL_CURRENT
static int	MCL_FUTURE
static int	O_APPEND
static int	O_CREAT
static int	O_DIRECT
static int	O_EXCL
static int	O_RDONLY
static int	O_RDWR
static int	O_SYNC
static int	O_TRUNC
static int	O_WRONLY
static int	SEEK_CUR
static int	SEEK_END
static int	SEEK_SET

Method Summary

Modifier and Type	Method and Description
void	close(int fd)
void	fallocate(int fd, long offset, long len)
void	fsync(int fd)
ONative.MemoryLimitResult	getMemoryLimit(boolean printSteps)
int	getOpenFilesLimit(boolean verbose, int recommended, int defLimit) Detects limit of limit of open files.
int	getpagesize()
static ONative	instance()
long	lseek(int fd, long offset, int whence)
int	open(String path, int flags)
int	pathconf(String path, int name)
void	posix_memalign(jnr.ffi.byref.PointerByReference memptr, jnr.ffi.NativeLong alignment, jnr.ffi.NativeLong size)
long	read(int fd, ByteBuffer buffer, int count)
long	write(int fd, ByteBuffer buffer, int count)

Methods inherited from class java.lang.Object

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

Field Detail

O_RDONLY

public static final int O_RDONLY

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Constant Field Values

O_WRONLY

public static final int O_WRONLY

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Constant Field Values

O_RDWR

public static final int O_RDWR

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Constant Field Values

O_CREAT

public static final int O_CREAT

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Constant Field Values

O_EXCL

public static final int O_EXCL

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Constant Field Values

O_APPEND

public static final int O_APPEND

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Constant Field Values

O_TRUNC

public static final int O_TRUNC

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Constant Field Values

O_DIRECT

public static final int O_DIRECT

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Constant Field Values

O_SYNC

public static final int O_SYNC

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Constant Field Values

SEEK_SET

public static final int SEEK_SET

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Constant Field Values

SEEK_CUR

public static final int SEEK_CUR

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Constant Field Values

SEEK_END

public static final int SEEK_END

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Constant Field Values

MCL_CURRENT

public static final int MCL_CURRENT

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Constant Field Values

MCL_FUTURE

public static final int MCL_FUTURE

See Also:

Constant Field Values

Method Detail

instance

public static ONative instance()

getOpenFilesLimit

public int getOpenFilesLimit(boolean verbose,
                             int recommended,
                             int defLimit)

Detects limit of limit of open files.

Parameters:

recommended - recommended value of limit of open files.

defLimit - default value for limit of open files.

Returns:

limit of open files, available for the system.

getMemoryLimit

public ONative.MemoryLimitResult getMemoryLimit(boolean printSteps)

Parameters:

printSteps - Print all steps of discovering of memory limit in the log with INFO level.

Returns:

Amount of memory which are allowed to be consumed by application, and detects whether OrientDB instance is running inside container. If null is returned then it was impossible to detect amount of memory on machine.

open

public int open(String path,
                int flags)
         throws LastErrorException

Throws:

LastErrorException

fallocate

public void fallocate(int fd,
                      long offset,
                      long len)
               throws LastErrorException

Throws:

LastErrorException

read

public long read(int fd,
                 ByteBuffer buffer,
                 int count)
          throws LastErrorException

Throws:

LastErrorException

write

public long write(int fd,
                  ByteBuffer buffer,
                  int count)
           throws LastErrorException

Throws:

LastErrorException

posix_memalign

public void posix_memalign(jnr.ffi.byref.PointerByReference memptr,
                           jnr.ffi.NativeLong alignment,
                           jnr.ffi.NativeLong size)
                    throws LastErrorException

Throws:

LastErrorException

getpagesize

public int getpagesize()
                throws LastErrorException

Throws:

LastErrorException

pathconf

public int pathconf(String path,
                    int name)
             throws LastErrorException

Throws:

LastErrorException

fsync

public void fsync(int fd)
           throws IOException

Throws:

IOException

lseek

public long lseek(int fd,
                  long offset,
                  int whence)
           throws LastErrorException

Throws:

LastErrorException

close

public void close(int fd)
           throws LastErrorException

Throws:

LastErrorException