// EJB: RISort extends javax.ejb.EJBObject
//      HISort extends javax.ejb.EJBHome
//      SortSlsbBean implements javax.ejb.SessionBean
//        implement "business" interface
//        implement "technical" interface
//      SortSlsbClient:
//        Object obj        = ic.lookup( "SortHome" );
//        HISort factoryObj = (HISort) PortableRemoteObject.narrow( obj, HISort.class );
//        RISort sorterObj  = factoryObject.create();
//      j2ee -verbose
//      deploytool

interface RISort extends javax.ejb.EJBObject {
  int[] sort( int[] array ) throws java.rmi.RemoteException;
}

interface HISort extends javax.ejb.EJBHome {
  RISort create() throws javax.ejb.CreateException, java.rmi.RemoteException;
}

public class SortSlsbBean implements javax.ejb.SessionBean {
  private javax.ejb.SessionContext context;

  // corresponds to HISort.create()
  public void ejbCreate() { System.out.println( "SortBean.ejbCreate" ); }

  // "business" interface from RISort
  public int[] sort( int[] array ) {
    System.out.print( "SortBean.sort() - " );
    for (int i=0; i < array.length; i++) System.out.print( array[i] + " " );
    System.out.println();
    for (int g = array.length/2; g > 0; g /= 2)
      for (int i = g; i < array.length; i++)
        for (int j = i-g; j >= 0; j -= g)
          if (array[j] > array[j+g]) {
            int temp = array[j];
            array[j] = array[j+g];
            array[j+g] = temp;
          }
    return array;
  }
  // "technical" interface from javax.ejb.SessionBean
  public void ejbActivate()  { System.out.println( "SortBean.ejbActivate" ); }
  public void ejbPassivate() { System.out.println( "SortBean.ejbPassivate" ); }
  public void ejbRemove()    { System.out.println( "SortBean.ejbRemove" ); }
  public void setSessionContext( javax.ejb.SessionContext ctx ) {
    System.out.println( "SortBean.setSessionContext" ); 
    context = ctx;
} }



import javax.rmi.*;      // PortableRemoteObject.narrow(), NamingException
import javax.naming.*;   // InitialContext

public class SortSlsbClient {
  public static void main( String[] args ) {
    int[] array = new int[15];
    java.util.Random rn = new java.util.Random();

    for (int i=0; i < array.length; i++) array[i] = rn.nextInt(20) + 1;
    for (int i=0; i < array.length; i++) System.out.print( array[i] + " " );
    System.out.println();

    try {
      InitialContext  ic   = new InitialContext();
      Object          obj  = ic.lookup( "SortHome" );
      HISort factoryObject = (HISort) PortableRemoteObject.narrow( obj, HISort.class );
      RISort sorterObject  = factoryObject.create();
      array = sorterObject.sort( array );
    } catch (javax.ejb.CreateException ex) { ex.printStackTrace();
    } catch (java.rmi.RemoteException ex)  { ex.printStackTrace();
    } catch (NamingException ex)           { ex.printStackTrace(); }

    for (int i=0; i < array.length; i++) System.out.print( array[i] + " " );
    System.out.println();
} }

// d:\> j2ee -verbose
// SortBean.setSessionContext
// SortBean.ejbCreate
// SortBean.sort() - 16 4 6 19 13 17 13 5 17 9 9 17 15 6 6
// SortBean.sort() - 12 3 9 9 19 17 2 20 2 5 18 16 7 15 20

// d:\j2ee> deploytool
// Remote message: Contacted Server....
// Remote message: SortDemo has 1 ejbs, 0 web components to deploy.
// Remote message: Deploying Ejbs....
// Remote message: Processing beans ....
// Remote message: Generating wrapper code for SortSLSB.
// Remote message: Compiling wrapper code ....
// Remote message: Compiling RMI-IIOP code ....
// Remote message: Deployment of SortDemo is complete.

// D:\j2ee\demos> javac SortSlsbBean.java
// D:\j2ee\demos> javac SortSlsbClient.java
// D:\j2ee\demos> java SortSlsbClient
// 16 4 6 19 13 17 13 5 17 9 9 17 15 6 6
// 4 5 6 6 6 9 9 13 13 15 16 17 17 17 19
// D:\j2ee\demos> java SortSlsbClient
// 12 3 9 9 19 17 2 20 2 5 18 16 7 15 20
// 2 2 3 5 7 9 9 12 15 16 17 18 19 20 20