package examples;

import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Properties;

/**
* This class is an example of client code which invokes
* methods on a simple stateless session bean.
*/
public class HelloClient {

  public static void main(String[] args) throws Exception {
    /*
     * Setup properties for JNDI initialization.
     *
     * These properties will be read-in from
     * the command-line.
     */
    Properties props = System.getProperties();

    /*
     * Obtain the JNDI initial context.
     *
     * The initial context is a starting point for
     * connecting to a JNDI tree. We choose our JNDI
     * driver, the network location of the server, etc
     * by passing in the environment properties.
     */
    Context ctx = new InitialContext(props);

    /*
     * Get a reference to the home object - the
     * factory for Hello EJB Objects
     */
    Object obj = ctx.lookup("HelloHome");

    /*
     * Home objects are RMI-IIOP objects, and so
     * they must be cast into RMI-IIOP objects
     * using a special RMI-IIOP cast.
     *
     * See Appendix X for more details on this.
     */
    HelloHome home = (HelloHome)
      javax.rmi.PortableRemoteObject.narrow(
        obj, HelloHome.class);

    /*
     * Use the factory to create the Hello EJB Object
     */
    Hello hello = home.create();

    /*
     * Call the hello() method on the EJB object. The
     * EJB object will delegate the call to the bean,
     * receive the result, and return it to us.
     *
     * We then print the result to the screen.
     */
    System.out.println(hello.hello());

    /*
     * Done with EJB Object, so remove it.
     * The container will destroy the EJB object.
     */
    hello.remove();
  }
}