org.kepler.ssh

Class ExecFactory

java.lang.Object

org.kepler.ssh.ExecFactory

public class ExecFactory
extends java.lang.Object

This class provides a factory to give you an object implementing the ExecInterface. It provides either an LocalExec object or an RemoteExec object based on the target you provide. RemoteExec object can either be an instance of SshExec or GsiSshExec based on whether the remote host supports grid authentication or not. The reference to a target is with "user@host:port". If port is not given, first an attempt is made to connect using gssapi at port 2222. If that fails, default to ssh at port 22.

Author:

Norbert Podhorszki

Method Summary

Modifier and Type	Method and Description
static ExecInterface	getExecObject(java.lang.String target) Helper method to provide the target as a complete string.
static ExecInterface	getExecObject(java.lang.String user, java.lang.String host)
static ExecInterface	getExecObject(java.lang.String user, java.lang.String host, int port) Return an object with ExecInterface, based on the specified target.

Methods inherited from class java.lang.Object

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

Method Detail

getExecObject

public static ExecInterface getExecObject(java.lang.String target)
                                   throws ExecException

Helper method to provide the target as a complete string. This method calls the other one after processing the input string.

Throws:

ExecException

getExecObject

public static ExecInterface getExecObject(java.lang.String user,
                                          java.lang.String host)
                                   throws ExecException

Throws:

ExecException

getExecObject

public static ExecInterface getExecObject(java.lang.String user,
                                          java.lang.String host,
                                          int port)
                                   throws ExecException

Return an object with ExecInterface, based on the specified target. It will be a LocalExec if host is null, empty or equals 'local', otherwise it will be an SshExec or GsiSshExec object based on the supported authentication mechanism. Grid authentication is given priority over ssh authentication. If no valid port is provided, first tries grid authentication at port 2222, if that fails defaults to ssh at port 22. The check for available authentications method is done only once per remote host and cached for later use.

Throws:

ExecException