2 * JNI interface to C code for MSG.
4 * Copyright 2006,2007,2010 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 /* FIXME: kill these C crufts */
29 /** Returns the last error code of the simulation */
30 public final static native int getErrCode();
32 /** Everything is right. Keep on going the way ! */
33 public static final int SUCCESS = 0;
35 /** Something must be not perfectly clean (but I may be paranoid freak...) */
36 public static final int WARNING = 1;
38 /** There has been a problem during your task transfer.
39 * Either the network is down or the remote host has been shutdown */
40 public static final int TRANSFERT_FAILURE = 2;
43 * The host on which you are running has just been rebooted.
44 * Free your data structures and return now ! */
45 public static final int HOST_FAILURE = 3;
47 /** Canceled task. This task has been canceled by somebody ! */
48 public static final int TASK_CANCELLLED = 4;
50 /** You've done something wrong. You'd better look at it... */
51 public static final int FATAL_ERROR = 5;
53 /** Retrieve the simulation time */
54 public final static native double getClock();
56 /** Issue an information logging message */
57 public final static native void info(String s);
59 /*********************************************************************************
60 * Deployment and initialization related functions *
61 *********************************************************************************/
64 * The natively implemented method to initialize a MSG simulation.
66 * @param args The arguments of the command line of the simulation.
70 public final static native void init(String[]args);
73 * Run the MSG simulation, and cleanup everything afterward.
75 * If you want to chain simulations in the same process, you
76 * should call again createEnvironment and deployApplication afterward.
78 * @see MSG_run, MSG_clean
80 public final static native void run() ;
83 * The native implemented method to create the environment of the simulation.
85 * @param platformFile The XML file which contains the description of the environment of the simulation
88 public final static native void createEnvironment(String platformFile);
91 * The method to deploy the simulation.
93 * @param platformFile The XML file which contains the description of the application to deploy.
95 public final static native void deployApplication(String deploymentFile);
97 /** Example launcher. You can use it or provide your own launcher, as you wish */
98 static public void main(String[]args) throws MsgException {
99 /* initialize the MSG simulation. Must be done before anything else (even logging). */
102 if (args.length < 2) {
103 Msg.info("Usage: Msg platform_file deployment_file");
107 /* Load the platform and deploy the application */
108 Msg.createEnvironment(args[0]);
109 Msg.deployApplication(args[1]);
110 /* Execute the simulation */