ds.granules.util

Class SystemCommand

java.lang.Object

ds.granules.util.SystemCommand

public class SystemCommand
extends Object

This is a utility class that allows one to execute native commands from Java. There are capabilities within this class to print out the output streams of the Process that executes this native code.

Author:

Shrideep Pallickara

Constructor Summary

Constructors

Constructor and Description
SystemCommand()

Method Summary

Methods

Modifier and Type	Method and Description
int	executeCommand(String command, String[] envp, File dir, boolean printOutput) This method executes a system command based on the specified parameter.
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemCommand

public SystemCommand()

Method Detail

executeCommand

public int executeCommand(String command,
                 String[] envp,
                 File dir,
                 boolean printOutput)
                   throws IOException,
                          InterruptedException

This method executes a system command based on the specified parameter. The method is designed such that it returns ONLY after the command has completed execution. A return value of 0 indicates normal termination, while anything else will signify abnormal termination.

Parameters:

command - The specified system command

envp - Array of strings, each element of which has environment variable settings in the format name=value, or null if the subprocess should inherit the environment of the current process.

dir - The working directory of the subprocess, or null if the subprocess should inherit the working directory of the current process.

printOutput - Prints the output of the execution of the command

Returns:

the exit value of the process. By convention, 0 indicates normal termination

Throws:

IOException - If an I/O error occurs

InterruptedException - if the current thread is interrupted by another thread while it is waiting, then the wait is ended and an InterruptedException is thrown.

main

public static void main(String[] args)

Parameters:

args -