memorytest.java

pastry的java实现的2.0b版

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

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

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********************************************************************************/
/*
 *  Created on Aug 8, 2005
 */
package rice.pastry.testing;

import java.io.*;
import java.io.PrintStream;
import java.net.*;
import java.net.InetSocketAddress;
import java.util.*;
import java.util.ArrayList;

import rice.environment.Environment;
import rice.pastry.*;
import rice.pastry.socket.*;
import rice.pastry.socket.SocketPastryNodeFactory;
import rice.pastry.standard.RandomNodeIdFactory;

/**
 * The purpose of this test is to verify that FreePastry is properly shutting
 * down, without having to destroy the JVM.
 *
 * @version $Id: pretty.settings 2305 2005-03-11 20:22:33Z jeffh $
 * @author Jeff Hoye
 */
public class MemoryTest {

  /**
   * The idea is to keep a ring of about 10 nodes alive, but one by one recycle
   * the nodes out. In the end, creating a whole lot of nodes, to see if they
   * are being properly cleaned up. TODO: make this return a boolean: Record the
   * memory at start (M1), then after creating the ringSize*2 nodes (M2)
   * (M2-M1/ringSize) is the approx memory for 1 node. M3 = (M2-M1) which is
   * basically the amount of memory that our ring of 10 should take up. at the
   * end of the test, record M4. if M4 > (M1+2*M3) then we probably have a leak,
   * fail. TODO: test this with other environment settings
   *
   * @exception Exception DESCRIBE THE EXCEPTION
   */
  public static void testOneEnvironment() throws Exception {
    //System.setOut(new PrintStream(new FileOutputStream("memtest.txt")));

    // setup
    int startPort = 5438;
    int ringSize = 10;
    int numNodes = 100;

    LinkedList nodes = new LinkedList();
    Runtime run = Runtime.getRuntime();
    long memUsed = run.totalMemory() - run.freeMemory();
    System.out.println("Memory:" + memUsed);
    Environment env = new Environment();
    env.getParameters().setBoolean("pastry_factory_selectorPerNode", false);
    env.getParameters().setBoolean("pastry_factory_processorPerNode", false);
    env.getParameters().setInt("pastry_socket_scm_ping_delay", 1000);
    env.getParameters().setInt("pastry_socket_scm_ping_jitter", 500);
    env.getParameters().setInt("pastry_socket_scm_num_ping_tries", 2);

    NodeIdFactory nidFactory = new RandomNodeIdFactory(env);

    //InetAddress localAddress = InetAddress.getByName("139.19.64.79");
    InetAddress localAddress = InetAddress.getLocalHost();

    PastryNodeFactory factory = new SocketPastryNodeFactory(nidFactory, localAddress, startPort, env);

    InetSocketAddress bootaddress = new InetSocketAddress(localAddress, startPort);

    int curNode = 0;
    // make initial ring of 10 nodes
    for (; curNode < numNodes; curNode++) {
      NodeHandle bootHandle = ((SocketPastryNodeFactory) factory).getNodeHandle(bootaddress);
      PastryNode node = factory.newNode((rice.pastry.NodeHandle) bootHandle);

      long waitTime = env.getTimeSource().currentTimeMillis();

      while (!node.isReady()) {
        Thread.sleep(1000);
        long waitedFor = env.getTimeSource().currentTimeMillis() - waitTime;
        //System.out.println("Waited for "+waitedFor+" millis.");
      }

      // print the current status
      long waitedFor = env.getTimeSource().currentTimeMillis() - waitTime;
      memUsed = run.totalMemory() - run.freeMemory();
      System.out.println(curNode + "/" + numNodes + " Memory:" + memUsed + " leafset size:" + node.getLeafSet().size() + " " + node + " after " + waitedFor);

      // always boot off of the previous node
      bootaddress = ((SocketNodeHandle) node.getLocalHandle()).getAddress();

      // store the node
      nodes.addLast(node);

      // kill a node
      if (curNode > ringSize) {
        PastryNode pn = (PastryNode) nodes.removeFirst();
        System.out.println("Destroying pastry node " + pn);
        pn.destroy();
        //System.out.println("Done destroying.");
      }
    }
    env.destroy();
  }

  /**
   * Same test as testOneEnvironment, but also creates/destroys the environment
   * for each node.
   */
  public static void testMultiEnvironment() {

  }

  /**
   * Same thing, but with direct
   */
  public static void testDirect() {

  }

  /**
   * The main program for the MemoryTest class
   *
   * @param args The command line arguments
   * @exception Exception DESCRIBE THE EXCEPTION
   */
  public static void main(String[] args) throws Exception {
    testOneEnvironment();
    testMultiEnvironment();
  }
}