/*************************************************************************

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.

- Neither  the name  of Rice  University (RICE) nor  the names  of its
contributors may be  used to endorse or promote  products derived from
this software without specific prior written permission.

This software is provided by RICE and the contributors on an "as is"
basis, without any representations or warranties of any kind, express
or implied including, but not limited to, representations or
warranties of non-infringement, merchantability or fitness for a
particular purpose. In no event shall RICE or contributors be liable
for any direct, indirect, incidental, special, exemplary, or
consequential damages (including, but not limited to, procurement of
substitute goods or services; loss of use, data, or profits; or
business interruption) however caused and on any theory of liability,
whether in contract, strict liability, or tort (including negligence
or otherwise) arising in any way out of the use of this software, even
if advised of the possibility of such damage.

********************************************************************************/
package rice.tutorial.lesson3;

import java.net.InetAddress;
import java.net.InetSocketAddress;

import rice.environment.Environment;
import rice.p2p.commonapi.Id;
import rice.p2p.commonapi.NodeHandleSet;
import rice.pastry.NodeHandle;
import rice.pastry.NodeIdFactory;
import rice.pastry.PastryNode;
import rice.pastry.PastryNodeFactory;
import rice.pastry.leafset.LeafSet;
import rice.pastry.socket.SocketPastryNodeFactory;
import rice.pastry.standard.RandomNodeIdFactory;

/**
 * This tutorial shows how to setup a FreePastry node using the Socket Protocol.
 *
 * @version $Id: pretty.settings 2305 2005-03-11 20:22:33Z jeffh $
 * @author Jeff Hoye
 */
public class DistTutorial {

  /**
   * This constructor sets up a PastryNode. It will bootstrap to an existing
   * ring if it can find one at the specified location, otherwise it will start
   * a new ring.
   *
   * @param bindport the local port to bind to
   * @param bootaddress the IP:port of the node to boot from
   * @param env the environment for these nodes
   * @exception Exception DESCRIBE THE EXCEPTION
   */
  public DistTutorial(int bindport, InetSocketAddress bootaddress, Environment env) throws Exception {

    // Generate the NodeIds Randomly
    NodeIdFactory nidFactory = new RandomNodeIdFactory(env);

    // construct the PastryNodeFactory, this is how we use rice.pastry.socket
    PastryNodeFactory factory = new SocketPastryNodeFactory(nidFactory, bindport, env);

    // This will return null if we there is no node at that location
    NodeHandle bootHandle = ((SocketPastryNodeFactory) factory).getNodeHandle(bootaddress);

    // construct a node, passing the null boothandle on the first loop will cause the node to start its own ring
    PastryNode node = factory.newNode(bootHandle);

    // the node may require sending several messages to fully boot into the ring
    while (!node.isReady()) {
      // delay so we don't busy-wait
      Thread.sleep(100);
    }

    System.out.println("Finished creating new node " + node);

    // construct a new MyApp
    MyApp app = new MyApp(node);

    // wait 10 seconds
    Thread.sleep(10000);

    // as long as we're not the first node
    if (bootHandle != null) {

      // route 10 messages
      for (int i = 0; i < 10; i++) {
        // pick a key at random
        Id randId = nidFactory.generateNodeId();

        // send to that key
        app.routeMyMsg(randId);

        // wait a sec
        Thread.sleep(1000);
      }

      // wait 10 seconds
      Thread.sleep(10000);

      // send directly to my leafset
      LeafSet leafSet = node.getLeafSet();

      // this is a typical loop to cover your leafset.  Note that if the leafset
      // overlaps, then duplicate nodes will be sent to twice
      for (int i = -leafSet.ccwSize(); i <= leafSet.cwSize(); i++) {
        if (i != 0) {
          // don't send to self
          // select the item
          NodeHandle nh = leafSet.get(i);

          // send the message directly to the node
          app.routeMyMsgDirect(nh);

          // wait a sec
          Thread.sleep(1000);
        }
      }
    }
  }

  /**
   * Usage: java [-cp FreePastry-<version>.jar]
   * rice.tutorial.lesson3.DistTutorial localbindport bootIP bootPort example
   * java rice.tutorial.DistTutorial 9001 pokey.cs.almamater.edu 9001
   *
   * @param args The command line arguments
   * @exception Exception DESCRIBE THE EXCEPTION
   */
  public static void main(String[] args) throws Exception {
    // Loads pastry settings
    Environment env = new Environment();

    try {
      // the port to use locally
      int bindport = Integer.parseInt(args[0]);

      // build the bootaddress from the command line args
      InetAddress bootaddr = InetAddress.getByName(args[1]);
      int bootport = Integer.parseInt(args[2]);
      InetSocketAddress bootaddress = new InetSocketAddress(bootaddr, bootport);

      // launch our node!
      DistTutorial dt = new DistTutorial(bindport, bootaddress, env);
    } catch (Exception e) {
      // remind user how to use
      System.out.println("Usage:");
      System.out.println("java [-cp FreePastry-<version>.jar] rice.tutorial.lesson3.DistTutorial localbindport bootIP bootPort");
      System.out.println("example java rice.tutorial.DistTutorial 9001 pokey.cs.almamater.edu 9001");
      throw e;
    }
  }
}
