* under the terms of the license (GNU LGPL) which comes with this package. */
package org.simgrid.msg;
-
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.io.File;
+import org.simgrid.NativeLib;
public final class Msg {
- /* Statically load the library which contains all native functions used in here */
- static private boolean isNativeInited = false;
- public static void nativeInit() {
- if (isNativeInited)
- return;
- try {
- /* prefer the version on disk, if existing */
- System.loadLibrary("simgrid-java");
- } catch (UnsatisfiedLinkError e) {
- /* If not found, unpack the one bundled into the jar file and use it */
- loadLib("simgrid");
- loadLib("simgrid-java");
- }
- isNativeInited = true;
- }
- static {
- nativeInit();
- }
- private static void loadLib (String name) {
- String Path = NativeLib.getPath();
-
- String filename=name;
- InputStream in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
-
- if (in == null) {
- filename = "lib"+name+".so";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dylib";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- throw new RuntimeException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
- }
-// Caching the file on disk: desactivated because it could fool the users
-// if (new File(filename).isFile()) {
-// // file was already unpacked -- use it directly
-// System.load(new File(".").getAbsolutePath()+File.separator+filename);
-// return;
-// }
- try {
- // We must write the lib onto the disk before loading it -- stupid operating systems
- File fileOut = new File(filename);
-// if (!new File(".").canWrite()) {
-// System.out.println("Cannot write in ."+File.separator+filename+"; unpacking the library into a temporary file instead");
- fileOut = File.createTempFile("simgrid-", ".tmp");
- // don't leak the file on disk, but remove it on JVM shutdown
- Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
-// }
-// System.out.println("Unpacking SimGrid native library to " + fileOut.getAbsolutePath());
- OutputStream out = new FileOutputStream(fileOut);
-
- /* copy the library in position */
- byte[] buffer = new byte[4096];
- int bytes_read;
- while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
- out.write(buffer, 0, bytes_read);
-
- /* close all file descriptors, and load that shit */
- in.close();
- out.close();
- System.load(fileOut.getAbsolutePath());
- } catch (Exception e) {
- System.err.println("Cannot load the bindings to the simgrid library: ");
- e.printStackTrace();
- System.err.println("This jar file does not seem to fit your system, sorry");
- System.exit(1);
- }
- }
- /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
- private static class FileCleaner implements Runnable {
- private String target;
- public FileCleaner(String name) {
- target = name;
- }
- public void run() {
- try {
- new File(target).delete();
- } catch(Exception e) {
- System.out.println("Unable to clean temporary file "+target+" during shutdown.");
- e.printStackTrace();
- }
- }
- }
- /** Retrieve the simulation time
- * @return The simulation time.
- */
+ /** Retrieve the simulation time
+ * @return The simulation time.
+ */
public final static native double getClock();
/**
* Issue a debug logging message.
public final static native void verb(String s);
/** Issue an information logging message
- * @param s
- */
+ * @param s
+ */
public final static native void info(String s);
/**
* Issue an warning logging message.
* of a process or the current date is perfectly ok.
*/
public final static native void run() ;
-
+
/** This function is useless nowadays, just stop calling it. */
@Deprecated
public final static void clean(){}
/**
* The method to deploy the simulation.
*
- *
- * @param deploymentFile
- */
+ *
+ * @param deploymentFile
+ */
public final static native void deployApplication(String deploymentFile);
- /** Example launcher. You can use it or provide your own launcher, as you wish
- * @param args
- * @throws MsgException
- */
+ /** Example launcher. You can use it or provide your own launcher, as you wish
+ * @param args
+ * @throws MsgException
+ */
static public void main(String[]args) throws MsgException {
/* initialize the MSG simulation. Must be done before anything else (even logging). */
Msg.init(args);
/* Execute the simulation */
Msg.run();
}
+
+ /* Class initializer, to initialize various JNI stuff */
+ static {
+ org.simgrid.NativeLib.nativeInit();
+ }
}