Interface VirtualMachine.ForOpenJ9.Dispatcher

All Known Implementing Classes:

VirtualMachine.ForOpenJ9.Dispatcher.ForJnaPosixEnvironment, VirtualMachine.ForOpenJ9.Dispatcher.ForJnaWindowsEnvironment

Enclosing class:

VirtualMachine.ForOpenJ9

public static interface VirtualMachine.ForOpenJ9.Dispatcher

A dispatcher for native operations being used for communication with an OpenJ9 virtual machine.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	VirtualMachine.ForOpenJ9.Dispatcher.ForJnaPosixEnvironment	A connector implementation for a POSIX environment using JNA.
static class	VirtualMachine.ForOpenJ9.Dispatcher.ForJnaWindowsEnvironment	A connector implementation for a Windows environment using JNA.

Method Summary

Modifier and Type	Method	Description
void	chownFileToUser(File file, long userId)	Changes the ownership of a file.
void	decrementSemaphore(File directory, String name, boolean global, int count)	Decrements a semaphore.
int	getOwnerIdOf(File file)	Returns the user id of the owner of the supplied file.
String	getTemporaryFolder(String processId)	Returns this machine's temporary folder.
void	incrementSemaphore(File directory, String name, boolean global, int count)	Increments a semaphore.
boolean	isExistingProcess(int processId)	Returns true if the supplied process id is a running process.
int	pid()	Returns the process id of this process.
void	setPermissions(File file, int permissions)	Sets permissions for the supplied file.
int	userId()	Returns the user id of this process.

Method Details

getTemporaryFolder

String getTemporaryFolder(String processId)

Returns this machine's temporary folder.

Parameters:

processId - The target process's id.

Returns:

The temporary folder.

pid

int pid()

Returns the process id of this process.

Returns:

The process id of this process.

userId

int userId()

Returns the user id of this process.

Returns:

The user id of this process

isExistingProcess

boolean isExistingProcess(int processId)

Returns true if the supplied process id is a running process.

Parameters:

processId - The process id to evaluate.

Returns:

true if the supplied process id is currently running.

getOwnerIdOf

int getOwnerIdOf(File file)

Returns the user id of the owner of the supplied file.

Parameters:

file - The file for which to locate the owner.

Returns:

The owner id of the supplied file.

setPermissions

void setPermissions(File file,
 int permissions)

Sets permissions for the supplied file.

Parameters:

file - The file for which to set the permissions.

permissions - The permission bits to set.

incrementSemaphore

void incrementSemaphore(File directory,
 String name,
 boolean global,
 int count)

Increments a semaphore.

Parameters:

directory - The sempahore's control directory.

name - The semaphore's name.

global - true if the semaphore is in the global namespace (only applicable on Windows).

count - The amount of increments.

decrementSemaphore

void decrementSemaphore(File directory,
 String name,
 boolean global,
 int count)

Decrements a semaphore.

Parameters:

directory - The sempahore's control directory.

name - The semaphore's name.

global - true if the semaphore is in the global namespace (only applicable on Windows).

count - The amount of decrements.

chownFileToUser

void chownFileToUser(File file,
 long userId)

Changes the ownership of a file. Can be called only if this process is owned by root.

Parameters:

file - The path of the file to change ownership of.

userId - The user that should own the file.