package edu.ucsb.cs.jicos.examples.asynchronouscomputing;

import edu.ucsb.cs.jicos.services.*;
import java.util.*;

final class Application 
{
    public static void main ( String args[] ) throws Exception
    {        
        // get arguments from the command line
        String hspDomainName = args[0];        
        int start = Integer.parseInt ( args[1] );  
        int amount = Integer.parseInt ( args[2] );                
        
        // get a reference to a Hosting Service Provider
        HspAgent agent = new HspAgent( hspDomainName );
        Client2Hsp hsp = agent.getClient2Hsp();
            
        // login
        Environment environment = new Environment( null, null );
        hsp.login( environment );        
        
        /* dispatch several asynchronous Fibonacci computations
         * start is the 1st Fibonacci number to compute
         * amount is the number of Fibonacci numbers to compute
         * E.g. start = 5, number = 3 means compute Fibonacci numbers 5, 6, & 7
         */
        Task task;
        Map table = new HashMap();
        for ( int number = start; number < start + amount; number++ )
        {
            task = new F( number );
            ResultId key = hsp.setComputation ( task );
            Integer value = new Integer( number );
            table.put( key, value );
        }
                       
        // get & print Result objects
        for ( int i = 0; i < amount; i++ )
        {
            Result result = hsp.getResult();
            ResultId key = result.getId();
            Integer number = (Integer) table.remove( key );
            Integer value = (Integer) result.getValue();
            System.out.println("F( " + number + " ) = " + value );
        }    
            
        hsp.logout();
    }
}