alluxio.cli.validation

Class Utils

java.lang.Object

alluxio.cli.validation.Utils

public final class Utils
extends Object

Utilities for validating Alluxio environment.

Method Summary

Modifier and Type	Method and Description
static alluxio.cli.validation.Utils.ProcessExecutionResult	getResultFromProcess(String[] args) Executes a command in another process and check for its execution result.
static boolean	isAddressReachable(String hostname, int port) Validates whether a network address is reachable.
static boolean	isAlluxioRunning(String className) Checks whether an Alluxio service is running.
static boolean	isMountingPoint(String path, String[] fsTypes) Checks whether a path is the mounting point of a RAM disk volume.
static List<String>	readNodeList(String fileName) Reads a list of nodes from given file name ignoring comments and empty lines.

Methods inherited from class java.lang.Object

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

Method Detail

isAddressReachable

public static boolean isAddressReachable(String hostname,
                                         int port)

Validates whether a network address is reachable.

Parameters:

hostname - host name of the network address

port - port of the network address

Returns:

whether the network address is reachable

isAlluxioRunning

public static boolean isAlluxioRunning(String className)

Checks whether an Alluxio service is running.

Parameters:

className - class name of the Alluxio service

Returns:

whether the Alluxio service is running

readNodeList

@Nullable
public static List<String> readNodeList(String fileName)

Reads a list of nodes from given file name ignoring comments and empty lines. Can be used to read conf/workers or conf/masters.

Parameters:

fileName - name of a file that contains the list of the nodes

Returns:

list of the node names, null when file fails to read

isMountingPoint

public static boolean isMountingPoint(String path,
                                      String[] fsTypes)
                               throws IOException

Checks whether a path is the mounting point of a RAM disk volume.

Parameters:

path - a string represents the path to be checked

fsTypes - an array of strings represents expected file system type

Returns:

true if the path is the mounting point of volume with one of the given fsTypes, false otherwise

Throws:

IOException - if the function fails to get the mount information of the system

getResultFromProcess

public static alluxio.cli.validation.Utils.ProcessExecutionResult getResultFromProcess(String[] args)

Executes a command in another process and check for its execution result.

Parameters:

args - array representation of the command to execute

Returns:

ProcessExecutionResult including the process's exit value, output and error