2 * JNI interface to C code for MSG.
4 * Copyright 2006,2007,2010,2011 The SimGrid Team.
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.
12 package org.simgrid.msg;
14 public final class Msg {
15 /* Statically load the library which contains all native functions used in here */
18 System.loadLibrary("SG_java");
19 } catch(UnsatisfiedLinkError e) {
20 System.err.println("Cannot load the bindings to the simgrid library: ");
23 "Please check your LD_LIBRARY_PATH, or copy the simgrid and SG_java libraries to the current directory");
28 /** Everything is right. Keep on going the way ! */
29 public static final int SUCCESS = 0;
31 /** Something must be not perfectly clean (but I may be paranoid freak...) */
32 public static final int WARNING = 1;
34 /** There has been a problem during your task transfer.
35 * Either the network is down or the remote host has been shutdown */
36 public static final int TRANSFERT_FAILURE = 2;
39 * The host on which you are running has just been rebooted.
40 * Free your data structures and return now ! */
41 public static final int HOST_FAILURE = 3;
43 /** Canceled task. This task has been canceled by somebody ! */
44 public static final int TASK_CANCELLLED = 4;
46 /** You've done something wrong. You'd better look at it... */
47 public static final int FATAL_ERROR = 5;
49 /** Retrieve the simulation time
52 public final static native double getClock();
54 * Issue an "debug" logging message.
55 * @param s message to log.
57 public final static native void debug(String s);
58 /** Issue an information logging message
61 public final static native void info(String s);
63 /*********************************************************************************
64 * Deployment and initialization related functions *
65 *********************************************************************************/
68 * The natively implemented method to initialize a MSG simulation.
70 * @param args The arguments of the command line of the simulation.
74 public final static native void init(String[]args);
77 * Run the MSG simulation.
79 * The simulation is not cleaned afterward (see
80 * {@link #clean()} if you really insist on cleaning the C side), so you can freely
81 * retrieve the informations that you want from the simulation. In particular, retrieving the status
82 * of a process or the current date is perfectly ok.
86 public final static native void run() ;
89 * Cleanup the MSG simulation.
91 * This function is only useful if you want to chain the simulations within
92 * the same environment. But actually, it's not sure at all that cleaning the
93 * JVM is faster than restarting a new one, so it's probable that using this
94 * function is not a brilliant idea. Do so at own risk.
98 public final static native void clean();
102 * The native implemented method to create the environment of the simulation.
104 * @param platformFile The XML file which contains the description of the environment of the simulation
107 public final static native void createEnvironment(String platformFile);
110 * The method to deploy the simulation.
113 * @param deploymentFile
115 public final static native void deployApplication(String deploymentFile);
117 /** Example launcher. You can use it or provide your own launcher, as you wish
119 * @throws MsgException
121 static public void main(String[]args) throws MsgException {
122 /* initialize the MSG simulation. Must be done before anything else (even logging). */
125 if (args.length < 2) {
126 Msg.info("Usage: Msg platform_file deployment_file");
130 /* Load the platform and deploy the application */
131 Msg.createEnvironment(args[0]);
132 Msg.deployApplication(args[1]);
133 /* Execute the simulation */