/* this is the application layer */
import java.util.*;
public class FinalServer1
{
    //Vector cities,countries,cars,credit_cards,computers;
    static final int cities=0;
    static final int countries=0;
    static final int cars=2;
    static final int credit_cards=3;
    static final int computers=4;
    static int count;
    int tabindex;
    String operation,table,data_item,result;
    Vector[] tables=new Vector[5];

    public FinalServer1()
    {    }

     void init()
    {
	for(int i=0;i<5;i++)
	    {  
		tables[i]=new Vector();
	    }
    }

    public static void main(String args[])
    {
	FinalServer1 a = new FinalServer1();
	a.init();
	DataAC dac=new DataAC();
	DataCA dca=new DataCA();
	int id=Integer.parseInt(args[0]);
	comm t=new comm(id,1200+id*2,0,2,dac,dca);
	while(true)
	    {

		try
		    {
			count++;
			if (count==20)
			    {
				System.out.println(a.tables[0].toString());
				System.out.println(a.tables[1].toString());
				System.out.println(a.tables[2].toString());
				System.out.println(a.tables[3].toString());
				System.out.println(a.tables[4].toString());
				count=0;
			    }
			Message m = (Message)dca.Consume();
			Debug.dump(m,"delivered :  ");
			String query=((CoreMessage)((Abcast)m.getmessageobj()).getCoreMessage()).getQuery();
			StringTokenizer str=new StringTokenizer(query);
			//System.out.println(query);
			a.table=str.nextToken();		
			a.operation=str.nextToken();
			a.data_item=str.nextToken();
			//System.out.println(a.operation);
			//System.out.println(a.table);
			//System.out.println(a.data_item);
			if(a.table.equals("cities"))
			    a.tabindex=0;
			else if(a.table.equals("countries"))
			    a.tabindex=1;
			else if(a.table.equals("cars"))
			    a.tabindex=2;
			else if(a.table.equals("credit_cards"))
			    a.tabindex=3;
			else
			    a.tabindex=4;
			//System.out.println(a.tabindex);
			if(a.operation.equals("view"))
			    {
				//System.out.println(a.tabindex);
				if(!a.tables[a.tabindex].isEmpty())
				    a.result=a.tables[a.tabindex].toString();
				else
				    a.result="empty table!";
			    }
			if(a.operation.equals("delete_last"))
			    {
				//System.out.println(a.tabindex);
				if(!a.tables[a.tabindex].isEmpty())
				    {
					a.tables[a.tabindex].removeElement(a.tables[a.tabindex].lastElement());
					a.result="Last element deleted";
				    }
				else
				    a.result="empty table!";

    
			    }
			if(a.operation.equals("insert_last"))
			    {
				//System.out.println(a.tabindex);
				a.tables[a.tabindex].add(a.data_item);
				a.result="Element inserted";
			    }
			CoreMessage cm=new CoreMessage(0,a.result,1);
			Message rm=new Message(0,-1,-1,-1,cm,-1,m.getmessagesource(),-1);
			if (m.getmessagedest()==id)
			dac.Produce(rm);
			    //if (id==0)   OLD CODE 

			//System.out.println("Query received at Application layer  : ");
		
		    }
		catch(Exception e)
		    {
			System.out.println("AppS : " + e);
		    }
	    }
    }
//	CoreMessage cm=new CoreMessage(92,"select * from emp_table",1); /* create a message */
//	DataComm_app.addApp_comm(cm); /* send a message App-->Comm */ 

}