Module datarush.library

Package com.pervasive.datarush.operators.io.vectorwise

Class RemoteCommandRunner

java.lang.Object

com.pervasive.datarush.operators.io.vectorwise.RemoteCommandRunner

All Implemented Interfaces:

CommandRunner

public class RemoteCommandRunner
extends Object
implements CommandRunner

Run a command on a remote server using the ssh protocol connecting to a sshd. Only user name and password authentication is supported.

Method Summary

Modifier and Type	Method	Description
void	dispose()	Close the ssh user session
protected Hashtable<String,String>	getConfig()
void	initialize()	Open a session to a remote ssh at the configured host and port.
int	runCommand(List<String> args, InputStream stdIn, OutputStream stdOut, OutputStream stdErr)	Submits the given command to the connected session.

Methods inherited from class java.lang.Object

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

Method Detail

getConfig

protected Hashtable<String,String> getConfig()

initialize

public void initialize()
                throws IOException

Open a session to a remote ssh at the configured host and port. The client authenticates with the ssh using the configured user name and password. If authentication fails and network communication errors occur, an IOException is thrown.

Specified by:

initialize in interface CommandRunner

Throws:

IOException - thrown if authentication fails or networking problems occur

runCommand

public int runCommand(List<String> args,
                      InputStream stdIn,
                      OutputStream stdOut,
                      OutputStream stdErr)
               throws IOException

Submits the given command to the connected session. The standard output and standard error are captured in the given output streams. The exit code of the shell command is provided as the return value. All resources for the opened command channel are released before returning. This method can be invoked multiple times as needed on an open client session.

Specified by:

runCommand in interface CommandRunner

Parameters:

command - the shell command to execute

stdOut - standard output of the command is captured here

stdErr - standard error of the shell command is captured here

Returns:

exit code of the shell command

Throws:

IOException - thrown if any error occur communicating with the remote sshd

dispose

public void dispose()
             throws IOException

Close the ssh user session

Specified by:

dispose in interface CommandRunner

Throws:

IOException - thrown if any errors occur