package com.titan.clients;
import com.titan.cabin.CabinHomeRemote;
import com.titan.cabin.CabinRemote;
import javax.naming.InitialContext;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.ejb.EJBMetaData;
import javax.ejb.FinderException;
import javax.rmi.PortableRemoteObject;
import java.rmi.RemoteException;
import java.util.Properties;
import java.io.*;
/**
* Example showing use of primary keys.
*
*/
public class Client_54 {
public static void main(String [] args) {
try {
Context jndiContext = getInitialContext();
Object ref = jndiContext.lookup("CabinHome");
CabinHomeRemote home = (CabinHomeRemote)
PortableRemoteObject.narrow(ref,CabinHomeRemote.class);
testReferences(home);
testSerialization(home);
System.out.println("Removing Cabin from database to clean up..");
// Make this client class re-entrant by cleaning up the bean we created
Integer pk = new Integer(101);
home.remove(pk);
} catch (java.rmi.RemoteException re){re.printStackTrace();}
catch (Throwable t){t.printStackTrace();}
}
/**
* Test the equivalence of two remote references to the same bean
*/
public static void testReferences(CabinHomeRemote home)
throws Exception {
System.out.println("Creating Cabin 101 and retrieving additional reference by pk");
CabinRemote cabin_1 = home.create(new Integer(101));
Integer pk = (Integer)cabin_1.getPrimaryKey();
CabinRemote cabin_2 = home.findByPrimaryKey(pk);
System.out.println("Testing reference equivalence");
// We now have two remote references to the same bean -- Prove it!
cabin_1.setName("Keel Korner");
if (cabin_2.getName().equals("Keel Korner")) {
System.out.println("Names match!");
}
// Test the isIdentical() function
if (cabin_1.isIdentical(cabin_2)) {
System.out.println("cabin_1.isIdentical(cabin_2) returns true - This is correct");
} else {
System.out.println("cabin_1.isIdentical(cabin_2) returns false - This is wrong!");
}
}
/**
* Test the serialization/deserialization of a primary key.
*/
public static void testSerialization(CabinHomeRemote home)
throws Exception {
System.out.println("Testing serialization of primary key");
Integer pk_1 = new Integer(101);
CabinRemote cabin_1 = home.findByPrimaryKey(pk_1);
System.out.println("Setting cabin name to Presidential Suite");
cabin_1.setName("Presidential Suite");
// Serialize the primary key for cabin 101 to a file.
FileOutputStream fos = new FileOutputStream("pk101.ser");
ObjectOutputStream outStream = new ObjectOutputStream(fos);
System.out.println("Writing primary key object to file...");
outStream.writeObject(pk_1);
outStream.flush();
outStream.close();
pk_1 = null;
// Deserialize the primary key for cabin 101.
FileInputStream fis = new FileInputStream("pk101.ser");
ObjectInputStream inStream = new ObjectInputStream(fis);
System.out.println("Reading primary key object from file...");
Integer pk_2 = (Integer)inStream.readObject();
inStream.close();
// Re-obtain a remote reference to cabin 101 and read its name.
System.out.println("Acquiring reference using deserialized primary key...");
CabinRemote cabin_2 = home.findByPrimaryKey(pk_2);
System.out.println("Retrieving name of Cabin using new remote reference...");
System.out.println(cabin_2.getName());
System.exit(0);
}
static public Context getInitialContext() throws Exception {
return new InitialContext();
}
}