Files:
  cog-1.2.patch - contains patch for Java COG version 1.2 to make it 
    compatible with Globus Toolkit's GridFTP protocol implementation 
    globus_ftp_control.
  Makefile - supported targets are all, clean and test

Available functionality:
  Job submission and control through gridftp interface
  Discovery of clusters in MDS
  Query and  parsing of cluster's attributes (no selection yet) 
  
Important:
  It is NECESSARY to patch Java CoG. That is needed because it's
  implementation of GridFTP protocol differs from one in Globus 
  Toolkit (at least up to version 3.2.x), which is used in ARC.
  More information can be found in Globus bugzilla
  http://bugzilla.globus.org/globus/show_bug.cgi?id=1315
  One can argue which implementation is more compatible with 
  GridFTP RFC. But anyway Globus Toolkit is primary thing, so 
  till people from Globus and Java CoG finally decide who is 
  right, I suggest to patch Java CoG.
  To do that, download Java CoG 1.2 source tarball cog-1.2-src.tar.gz
  (e.g. http://www-unix.globus.org/cog/distribution/1.2/cog-1.2-src.tar.gz)
  to some directory (for example this) and unpack it. 
   tar -zxvf cog-1.2-src.tar.gz
  Copy cog-1.2.patch to same directory (if needed) and run command
   patch -p0 <cog-1.2.patch
  If there are no errors continue.
  Go to directory cog-1.2 and read file INSTALL. Follow instructions 
  in it to build cog-jglobus.jar (it is built with command ant jar).
  Now either install CoG as described in INSTALL or simple copy
  cog-jglobus.jar where You already installed binary Java CoG 
  distribution.
  * For impatient * You can find compiled pathed cog-jglobus.jar at 
  http://grid.uio.no/~aleks/JavaCoG/cog-jglobus.jar.
  * Note * Patch should not destory any functionality of Java CoG.
  Report to me if You noticed anything like that.
  
TESTING:

source setclasspath
make 
make test

Or you can do:
source setclasspath
make
make lib
and compile + run the following test prg in this directory

import org.nordugrid.job.gridftp.ARCGridFTPJob;
import java.util.Vector;
import java.io.File;

public class TestLib {
    public static void main(String[] args) {
      try {
        ARCGridFTPJob job = new ARCGridFTPJob("gsiftp://grid.uio.no/jobs");
        //add proxy, otherwise it uses a proxy based on cog.properties.
        File f = new File("/tmp/proxy");
        if (f.exists()) {
        	job.addProxyLocation("/tmp/proxy");
        }
        Vector files = new Vector();
        Vector names = new Vector();
        files.addElement("test.txt");
        names.addElement("test/test.dat");
        //job.Submit("&(executable=/bin/echo)(action=request)(arguments=\"/bin/echo\" \"Test\")(join=yes)(stdout=out.txt)(outputfiles=(\"test\" \"\"))",files,names);
        job.Submit("&(executable=/bin/echo)(action=request)(arguments=\"/bin/echo\" \"Test\")");
        System.err.println("ID: " + job.Id());
        System.err.println("State: " + job.State());
        System.err.println("List");
        files = job.List();
        for(int i = 0;i<files.size();i++) {
            System.err.println("File: "+(String)(files.get(i)));
        }
        System.err.println("Get");
        job.Get("/tmp/"+job.Id());
        System.err.println("Cancel");
        job.Cancel();
        System.err.println("Clean");
        job.Clean();
        System.err.println("State: " + job.State());
        job.Disconnect();
      } catch(java.lang.Exception err) {
        System.err.println("Error: " + err.getMessage());
      }
      System.err.println("Exiting");
    }
}