src/java/simgrid/msg/ApplicationHandler.java

   1 /*
   2  * simgrid.msg.ApplicationHandler.java  1.00 07/05/01
   3  *
   4  * Copyright 2006,2007 Martin Quinson, Malek Cherier
   5  * All right reserved.
   6  *
   7  * This program is free software; you can redistribute
   8  * it and/or modify it under the terms of the license
   9  *(GNU LGPL) which comes with this package.
  10  */
  11
  12 package simgrid.msg;
  13
  14 import java.util.Vector;
  15 import org.xml.sax.*;
  16 import org.xml.sax.helpers.*;
  17
  18 /**
  19  * The handler used to parse the deployment file which contains
  20  * the description of the application (simulation).
  21  *
  22  * @author  Abdelmalek Cherier
  23  * @author  Martin Quinson
  24  * @version 1.00, 07/05/01
  25  * @see Host
  26  * @see Process
  27  * @see Simulation
  28  * @since SimGrid 3.3
  29  * @since JDK1.5011
  30  */
  31 public final class ApplicationHandler extends DefaultHandler
  32 {
  33
  34         /*
  35          * This class is used to create the processes descibed in the deployment file.
  36          */
  37         class ProcessFactory
  38         {
  39                 /**
  40                  * The vector which contains the arguments of the main function
  41                  * of the process object.
  42                  */
  43                 public Vector args;
  44
  45                 /**
  46                  * The name of the host of the process.
  47                  */
  48                 private String hostName;
  49
  50                 /**
  51                  * The function of the process.
  52                  */
  53                 private String function;
  54
  55                 /**
  56                  * Default constructor.
  57                  */
  58                 public ProcessFactory(){
  59                         this.args = new Vector();
  60                         this.hostName = null;
  61                         this.function = null;
  62                 }
  63
  64                 /**
  65                  * This method is called by the start element handler.
  66                  * It sets the host and the function of the process to create,
  67                  * and clear the vector containing the arguments of the
  68                  * previouse process function if needed.
  69                  *
  70                  * @host                                The host of the process to create.
  71                  * @function                    The function of the process to create.
  72                  *
  73                  */
  74                 public void setProcessIdentity(String hostName, String function){
  75                         this.hostName = hostName;
  76                         this.function = function;
  77
  78                         if(!args.isEmpty())
  79                                 args.clear();
  80                 }
  81
  82                 /**
  83                  * This method is called by the startElement() handler.
  84                  * It stores the argument of the function of the next
  85                  * process to create in the vector of arguments.
  86                  *
  87                  * @arg                                 The argument to add.
  88                  *
  89                  */
  90                 public void registerProcessArg(String arg){
  91                         this.args.add(arg);
  92                 }
  93
  94                 public void createProcess(){
  95                         try {
  96
  97                                 System.out.println("Create process " + function + " on the host " + hostName);
  98                         Class cls = Class.forName(this.function);
  99                         simgrid.msg.Process process = (simgrid.msg.Process)cls.newInstance();
 100                         process.name = process.getName(); //this.function;
 101                         process.id = simgrid.msg.Process.nextProcessId++;
 102                         Host host = Host.getByName(this.hostName);
 103                         Msg.processCreate(process,host);
 104
 105                         Vector args = processFactory.args;
 106                         int size = args.size();
 107
 108                         for(int index = 0; index < size; index++)
 109                                 process.addArg((String)args.get(index));
 110
 111                 } catch(HostNotFoundException e) {
 112                         System.out.println(e.toString());
 113                         e.printStackTrace();
 114
 115                 } catch(ClassNotFoundException e) {
 116                         System.out.println(this.function + " class not found\n The attribut function of the element process  of your deployment file\n must correspond to the name of a Msg Proces class)");
 117                         e.printStackTrace();
 118
 119                 } catch(Exception e) {
 120                          System.out.println("Unexpected exception");
 121                          e.printStackTrace();
 122                 }
 123
 124         }
 125         }
 126
 127         /*
 128          * the ProcessFactory object used to create the processes.
 129          */
 130         private ProcessFactory processFactory;
 131
 132     public ApplicationHandler() {
 133         super();
 134     }
 135     /**
 136      * instanciates the process factory
 137      */
 138     public void startDocument(){
 139         this.processFactory = new ProcessFactory();
 140     }
 141
 142     public void characters(char[] caracteres, int debut, int longueur) {} // NOTHING TODO
 143
 144    /**
 145     * element handlers
 146     */
 147     public void startElement(String nameSpace, String localName,String qName,Attributes attr) {
 148         if(localName.equals("process"))
 149             onProcessIdentity(attr);
 150                 else if(localName.equals("argument"))
 151             onProcessArg(attr);
 152     }
 153
 154      /**
 155      * process attributs handler.
 156      */
 157     public void onProcessIdentity(Attributes attr) {
 158         processFactory.setProcessIdentity(attr.getValue(0),attr.getValue(1));
 159     }
 160
 161         /**
 162      * process arguments handler.
 163      */
 164     public void onProcessArg(Attributes attr) {
 165         processFactory.registerProcessArg(attr.getValue(0));
 166     }
 167
 168     /**
 169      * creates the process
 170      */
 171     public void endElement(String nameSpace, String localName,String qName)  {
 172         if(localName.equals("process"))
 173 {
 174                 processFactory.createProcess();
 175         }
 176     }
 177
 178     public void endDocument() {} // NOTHING TODO
 179 }