コード例 #1
0
  /**
   * Given a filename, parses the seeds of the various independent streams from the file. An example
   * seedfile looks like:
   *
   * <p>
   *
   * <pre>
   * PLACES 6167 34322 540141     #to place nodes on the plane
   * CONNECT 4149 3274 811023     #to connect nodes
   * EDGE_CONN 4321 6394 564736   #used in the edge connection method in TopDownHier model
   * GROUPING 39856 9062 30034    #used when grouping routers into an AS, in BottomUpHier model
   * ASSIGNMENT 2603 24124 6350  #used in BottomUpHierModel to decide how many routers each AS gets.
   * BANDWIDTH 1073 33601 47040  #used to specify bandwidth to edges in a topology
   * </pre>
   *
   * <p>The divisions of three are to maintain compatability with the C++ version's erand48() call.
   */
  public void parse(String filename) {
    BufferedReader br = null;
    try {
      br = new BufferedReader(new FileReader(new File(filename)));
    } catch (IOException e) {
      Util.ERR("Error reading seedfile. " + e);
    }

    String line = "";
    try {
      while ((line = br.readLine()) != null) {
        StringTokenizer st = new StringTokenizer(line);
        String seedName = st.nextToken();
        String first = st.nextToken();
        String second = st.nextToken();
        String third = st.nextToken();
        String seedString = first.trim() + second.trim() + third.trim();
        long seedValue = Long.parseLong(seedString);
        if (seedName.equals("PLACES")) setPlaceNodesSeed(seedValue);
        else if (seedName.equals("CONNECT")) setConnectNodesSeed(seedValue);
        else if (seedName.equals("BANDWIDTH")) setBWSeed(seedValue);
        else if (seedName.equals("EDGE_CONN")) setEdgeConnSeed(seedValue);
        else if (seedName.equals("GROUPING")) setGroupingSeed(seedValue);
        else if (seedName.equals("ASSIGNMENT")) setAssignSeed(seedValue);
      }
    } catch (Exception e2) {
      Util.ERR("Error reading seedfile. " + e2);
    }
  }
コード例 #2
0
  /**
   * Export the seeds used to lastSeedFile. (generally called "last_seed_file") Export the current
   * state of the PRNG and to nextSeedFile so the next experiement can continue to use the
   * independent streams (generally this file is called "seed_file")
   */
  public void export(String lastSeedFile, String nextSeedFile) {
    Util.MSG("exporting seedfiles..");
    BufferedWriter bw = null;
    try {
      bw = new BufferedWriter(new FileWriter(new File(lastSeedFile)));
      bw.write("PLACES " + longTo3String(placeSeed) + "\t# used when placing nodes on the plane");
      bw.newLine();
      bw.write("CONNECT " + longTo3String(connectSeed) + "\t# used when interconnecting nodes");
      bw.newLine();
      bw.write(
          "EDGE_CONN "
              + longTo3String(ECSeed)
              + "\t# used in the edge connection method of top down hier");
      bw.newLine();
      bw.write(
          "GROUPING "
              + longTo3String(GroupSeed)
              + "\t# used when deciding which routers to group into an AS in bottom up hier");
      bw.newLine();
      bw.write(
          "ASSIGNMENT "
              + longTo3String(AssignSeed)
              + "\t# used when deciding how many routers to group into an AS in bottom up hier");
      bw.newLine();
      bw.write("BANDWIDTH " + longTo3String(BWSeed) + "\t# used when assigning bandwidths");
      bw.newLine();
      bw.close();
    } catch (IOException e) {
      System.out.println("[BRITE ERROR]: Error writing seeds to seedfile. " + e);
    }

    try {
      bw = new BufferedWriter(new FileWriter(new File(nextSeedFile)));
      bw.write(
          "PLACES "
              + longTo3String(PlaceRandom.nextLong())
              + "\t# used when placing nodes on the plane");
      bw.newLine();
      bw.write(
          "CONNECT "
              + longTo3String(ConnectRandom.nextLong())
              + "\t# used when interconnecting nodes");
      bw.newLine();
      bw.write(
          "EDGE_CONN "
              + longTo3String(EdgeConnRandom.nextLong())
              + "\t# used in the edge connection method of top down hier");
      bw.newLine();
      bw.write(
          "GROUPING "
              + longTo3String(GroupingRandom.nextLong())
              + "\t# used when deciding which routers to group into an AS in bottom up hier");
      bw.newLine();
      bw.write(
          "ASSIGNMENT "
              + longTo3String(AssignRandom.nextLong())
              + "\t# used when deciding how many routers to group into an AS in bottom up hier");
      bw.newLine();
      bw.write(
          "BANDWIDTH " + longTo3String(BWRandom.nextLong()) + "\t# used when assigning bandwidths");
      bw.newLine();
      bw.close();
    } catch (IOException e) {
      System.out.println("[BRITE ERROR]: Error writing seeds to seedfile. " + e);
    }
  }