Launch Code

• When should servers be launched?
• When should servers be shutdown?
• When should server save their state to a persistent store?
• The launch script looks like:

  start rmiregistry
  start java -Djava.security.manager -Djava.security.policy="d:\\java.policy" 
     com.ora.rmibook.chapter9.applications.ImplLauncher Bob 10000 Alex 1223
  

• The actual launcher is:

public class ImplLauncher {
  public static void main(String[] args) {
    Collection nameBalancePairs = getNameBalancePairs(args);
    Iterator i = nameBalancePairs.iterator();

    while (i.hasNext()) {
      NameBalancePair nextNameBalancePair = (NameBalancePair) i.next();

      launchServer(nextNameBalancePair);
    }
  }

  private static void launchServer(NameBalancePair serverDescription) {
    try {
      Account_Impl newAccount = new Account_Impl(serverDescription.balance);

      Naming.rebind(serverDescription.name, newAccount);
      System.out.println("Account " + serverDescription.name + " successfully launched.");
    } catch (Exception e) {
    }
  }

  private static Collection getNameBalancePairs(String[] args) {
    int i;
    ArrayList returnValue = new ArrayList();

    for (i = 0; i < args.length; i += 2) {
      NameBalancePair nextNameBalancePair = new NameBalancePair();

      nextNameBalancePair.name = args[i];
      int cents = (new Integer(args[i + 1])).intValue();

      nextNameBalancePair.balance = new Money(cents);
      returnValue.add(nextNameBalancePair);
    }
    return returnValue;
  }

  private static class NameBalancePair {
    String name;
    Money balance;
  }
}