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

"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.pastry.testing;

import rice.environment.Environment;
import rice.environment.logging.Logger;
import rice.pastry.*;
import rice.pastry.standard.*;
import rice.pastry.dist.*;

import java.util.*;
import java.io.IOException;
import java.net.*;

/**
 * A hello world example for pastry. This is the distributed driver. For
 * example, run with default arguments on two machines, both with args
 * -bootstrap firstmachine. Read the messages and follow the protocols. Either
 * separately or with the above, try -nodes 3 and -nodes 20. Try -msgs 100. Try
 * the two machine configuration, kill it, restart, and watch it join as a
 * different node. Do that a few times, watch LeafSet entries accumulate, then
 * in 30 seconds, watch the maintenance take over.
 *
 * @version $Id: DistHelloWorld.java 2808 2005-11-22 14:38:49Z jeffh $
 * @author Sitaram Iyer
 * @author Peter Druschel
 */

public class DistHelloWorld {
  private PastryNodeFactory factory;

  private Vector pastryNodes;

  private Vector helloClients;

  /**
   * DESCRIBE THE FIELD
   */
  public Environment environment;

  private static int port = 5009;

  private static String bshost = null;

  private static int bsport = 5009;

  private static int numnodes = 1;

  private static int nummsgs = 2;
  // per virtual node

    /**
   * DESCRIBE THE FIELD
   */
  public static int protocol = DistPastryNodeFactory.PROTOCOL_DEFAULT;

  /**
   * Constructor
   *
   * @param env DESCRIBE THE PARAMETER
   * @exception IOException DESCRIBE THE EXCEPTION
   */
  public DistHelloWorld(Environment env) throws IOException {
    environment = env;
    factory = DistPastryNodeFactory.getFactory(new IPNodeIdFactory(InetAddress.getLocalHost(), port, env),
      protocol, port, env);
    pastryNodes = new Vector();
    helloClients = new Vector();
  }

  /**
   * Gets a handle to a bootstrap node. First we try localhost, to see whether a
   * previous virtual node has already bound itself there. Then we try nattempts
   * times on bshost:bsport. Then we fail.
   *
   * @param firstNode true of the first virtual node is being bootstrapped on
   *      this host
   * @return handle to bootstrap node, or null.
   */
  protected NodeHandle getBootstrap(boolean firstNode) {
    InetSocketAddress addr = null;
    if (firstNode && bshost != null) {
      addr = new InetSocketAddress(bshost, bsport);
    } else {
      try {
        addr = new InetSocketAddress(InetAddress.getLocalHost().getHostName(),
          bsport);
      } catch (UnknownHostException e) {
        System.out.println(e);
      }
    }

    NodeHandle bshandle = ((DistPastryNodeFactory) factory).getNodeHandle(addr);
    return bshandle;
  }

  /**
   * Create a Pastry node and add it to pastryNodes. Also create a client
   * application for this node, so that when this node comes up ( when
   * pn.isReady() is true) , this application's notifyReady() method is called,
   * and it can do any interesting stuff it wants.
   *
   * @param firstNode DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public PastryNode makePastryNode(boolean firstNode) {
    NodeHandle bootstrap = getBootstrap(firstNode);
    PastryNode pn = factory.newNode(bootstrap);
    // internally initiateJoins
    pastryNodes.addElement(pn);

    HelloWorldApp app = new HelloWorldApp(pn);
    helloClients.addElement(app);
    System.out.println("created " + pn);
    return pn;
  }

  /**
   * process command line args,
   *
   * @param args DESCRIBE THE PARAMETER
   * @param env DESCRIBE THE PARAMETER
   */
  private static void doIinitstuff(String args[], Environment env) {

    // process command line arguments

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-help")) {
        System.out.println("Usage: DistHelloWorld [-msgs m] [-nodes n] [-port p] [-bootstrap bshost[:bsport]]");
        System.out.println("                     [-protocol (rmi|wire)] [-verbose|-silent|-verbosity v] [-help]");
        System.out.println("");
        System.out.println("  Ports p and bsport refer to RMI registry  or Socket port numbers (default = 5009).");
        System.out.println("  Without -bootstrap bshost[:bsport], only localhost:p is used for bootstrap.");
        System.out.println("  Default verbosity is 8, -verbose is 1, and -silent is 10 (error msgs only).");
        System.exit(1);
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-msgs") && i + 1 < args.length) {
        nummsgs = Integer.parseInt(args[i + 1]);
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-verbosity") && i + 1 < args.length) {
        int num = Integer.parseInt(args[i + 1]);
        env.getParameters().setInt("loglevel", num * 100);
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-silent") && i + 1 < args.length) {
        env.getParameters().setInt("loglevel", Logger.SEVERE);
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-verbose") && i + 1 < args.length) {
        env.getParameters().setInt("loglevel", Logger.ALL);
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-port") && i + 1 < args.length) {
        int p = Integer.parseInt(args[i + 1]);
        if (p > 0) {
          port = p;
          bsport = p;
        }
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-bootstrap") && i + 1 < args.length) {
        String str = args[i + 1];
        int index = str.indexOf(':');
        if (index == -1) {
          bshost = str;
          bsport = port;
        } else {
          bshost = str.substring(0, index);
          bsport = Integer.parseInt(str.substring(index + 1));
          if (bsport <= 0) {
            bsport = port;
          }
        }
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-nodes") && i + 1 < args.length) {
        int n = Integer.parseInt(args[i + 1]);
        if (n > 0) {
          numnodes = n;
        }
        break;
      }
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-protocol") && i + 1 < args.length) {
        String s = args[i + 1];
        if (s.equalsIgnoreCase("socket")) {
          protocol = DistPastryNodeFactory.PROTOCOL_SOCKET;
        } else {
          System.out.println("ERROR: Unsupported protocol: " + s);
        }

        break;
      }
    }

  }

  /**
   * Usage: DistHelloWorld [-msgs m] [-nodes n] [-port p] [-bootstrap
   * bshost[:bsport]] [-verbose|-silent|-verbosity v] [-help]. Ports p and
   * bsport refer to Socket port numbers (default = 5009). Without -bootstrap
   * bshost[:bsport], only localhost:p is used for bootstrap. Default verbosity
   * is 8, -verbose is 1, and -silent is 10 (error msgs only).
   *
   * @param args DESCRIBE THE PARAMETER
   * @exception IOException DESCRIBE THE EXCEPTION
   */
  public static void main(String args[]) throws IOException {

    Environment env = new Environment();
    env.getParameters().setInt("loglevel", 800);
    doIinitstuff(args, env);
    DistHelloWorld driver = new DistHelloWorld(env);

    // create first node
    PastryNode pn = driver.makePastryNode(true);

    // We wait till the first PastryNode on this host is ready so that the
    // rest of the nodes find a bootstrap node on the local host
    synchronized (pn) {
      while (!pn.isReady()) {
        try {
          pn.wait();
        } catch (InterruptedException e) {
          System.out.println(e);
        }
      }
    }

    for (int i = 1; i < numnodes; i++) {
      pn = driver.makePastryNode(false);
      synchronized (pn) {
        while (!pn.isReady()) {
          try {
            pn.wait();
          } catch (InterruptedException e) {
            System.out.println(e);
          }
        }
      }
    }

    System.out.println(numnodes + " nodes constructed");

    for (int i = 0; i < nummsgs; i++) {
      for (int client = 0; client < driver.helloClients.size(); client++) {
        HelloWorldApp app = (HelloWorldApp) driver.helloClients.get(client);
        app.sendRndMsg(driver.environment.getRandomSource());
      }
    }
  }
}

