bankcmpclient.java

java的一系列产品中包括jsme,jmse,j2ee,本文件提供j2ee实现的源代码.

package bankcmp;

import java.rmi.RemoteException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;

import javax.ejb.CreateException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;

public final class BankCMPClient extends BaseClient {

  private BankHome BankHome;
 
  private Context ctx;

  public BankCMPClient(String [] argv) throws NamingException
  {
    super(argv);

    ctx = getInitialContext();

    BankHome = 
      (BankHome) narrow(ctx.lookup("BankCMPEJB"), BankHome.class);
  }

  ////////////////////////////////////////////////////
  // Utility code
  private void deleteOldBanks(int N) {
    
    for (int i=0; i<N; i++) {
      try {
        BankHome.remove(new Integer(i));
      } catch (Exception ignore) {}
    }
  }
  
  private void pause() {
    try {
      Thread.currentThread().sleep(10000);
    } catch (Exception e) {}
  }

  ////////////////////////////////////////////////////
  // Create Beans For CMP Examples

  private Bank[] createBanks() throws CreateException,RemoteException
  {
    System.err.println("Creating Bank CMP Entity beans.....");

    String [] names = { "LiMing", "ZhangHong", "Peter", "Mike", "Jim" };
    float [] values = { 50, 60, 70, 80, 90 };
    
    deleteOldBanks(names.length);
    Bank [] Banks = new Bank[names.length];

    for (int i=0; i<names.length; i++) {      
      // create account in the 2th level
      Banks[i] = BankHome.create(i,names[i], values[i], 2);
    }
    return Banks;
  }

  private void runClient() throws Exception
  {
    System.err.println("Running EJB 2.0 CMP Example:\n");
    
    Bank [] Banks = null;
    try {
      Banks = createBanks();      
    } catch (Exception e) {
      System.err.println("Unable to create the example beans.");
      System.err.println("The error was: ");
      e.printStackTrace();
      throw e;
    }
    
    System.err.println("Finding All the Banks in level 2.\n");    
    try {
      Collection c = BankHome.findAccountsInLevel(2);
      if (c.isEmpty()) {
        System.err.println("No Banks were found in level 2.");
      } else {
        Iterator it = c.iterator();
        while (it.hasNext()) {
          Bank s = (Bank) narrow(it.next(), Bank.class);
          System.err.println("Found Account named: "+s.getOwnerName()+
            " AccountID:"+s.getAccountID()+"  AccountValue:"+
            s.getAccountValue()+" in level:"+s.getAccountLevel());
        }
        System.err.println("");
      }
    } catch (Exception e) {
      System.err.println("Unable to find Banks in level 2.");
      System.err.println("The error was: ");
      //e.printStackTrace();
      //throw e;
    }
  }
      
  public static void main(String[] argv) throws Exception
  {
    BankCMPClient sc = new BankCMPClient(argv);
    sc.runClient();
  }
}