package org.jboss.book.security.ex3a;import java.rmi.RemoteException;import javax.naming.InitialContext;import javax.security.auth.login.LoginException;import javax.security.auth.login.LoginContext;import org.apache.log4j.Logger;import org.apache.log4j.FileAppender;import org.apache.log4j.PatternLayout;import org.jboss.logging.XLevel;import org.jboss.security.auth.callback.UsernamePasswordHandler;/** * * @author  Scott.Stark@jboss.org * @version $Revision: 1.1 $ */public class ExClient{   public static void main(String args[]) throws Exception   {      // Set up a simple configuration that logs on the console.      FileAppender fa = new FileAppender(new PatternLayout("%r[%c{1}], %m%n"), "ex3a-trace.log");      fa.setAppend(false);      Logger cat = Logger.getLogger("org.jboss.security");      cat.setLevel(XLevel.TRACE);      cat.setAdditivity(false);      cat.addAppender(fa);      cat = Logger.getLogger("org.jboss.invocation");      cat.setLevel(XLevel.TRACE);      cat.setAdditivity(false);      cat.addAppender(fa);      // Login using SRP      System.out.println("Logging in using the 'srpHA' configuration");      String username = args[0];      char[] password = args[1].toCharArray();      UsernamePasswordHandler handler = new UsernamePasswordHandler(username, password);      LoginContext lc = new LoginContext("srpHA", handler);      lc.login();      InitialContext iniCtx = new InitialContext();      Object ref = iniCtx.lookup("EchoBean3a");      EchoHome home = (EchoHome) ref;      Echo echo = home.create();      System.out.println("Created Echo");      // Make some calls across the cluster      for(int c = 1; c <= 4; c ++)      {         System.out.println("Echo.echo()#"+c+" = "+echo.echo("This is call "+c));      }      lc.logout();   }}