import java.io.File;

import java.util.Set;

import javax.management.Attribute;

import javax.management.MBeanServer;

import javax.management.MBeanServerFactory;

import javax.management.ObjectInstance;

import javax.management.ObjectName;

import javax.management.ReflectionException;

public class LibraryLoaderTest {

private static final String mletInfo[][] = {

{"testDomain:type=MLet,index=0", "UseNativeLib0.html"},

{"testDomain:type=MLet,index=1", "UseNativeLib1.html"}

};

public static void main (String args[]) {

String osName = System.getProperty("os.name");

System.out.println("os.name=" + osName);

String osArch = System.getProperty("os.arch");

System.out.println("os.name=" + osArch);

// Check for supported platforms:

//

// Solaris/SPARC and Windows/x86

//

if ((!(osName.equals("SunOS") && osArch.equals("sparc"))) &&

(!(osName.startsWith("Windows") && osArch.equals("x86")))) {

System.out.println(

"This test runs only on Solaris/SPARC and Windows/x86 platforms");

System.out.println("Bye! Bye!");

return;

}

String libPath = System.getProperty("java.library.path");

System.out.println("java.library.path=" + libPath);

String testSrc = System.getProperty("test.src");

System.out.println("test.src=" + testSrc);

String workingDir = System.getProperty("user.dir");

System.out.println("user.dir=" + workingDir);

String urlCodebase;

if (testSrc.startsWith("/")) {

urlCodebase =

"file:" + testSrc.replace(File.separatorChar, '/') + "/";

} else {

urlCodebase =

"file:/" + testSrc.replace(File.separatorChar, '/') + "/";

}

try {

// Create MBeanServer

//

MBeanServer server = MBeanServerFactory.newMBeanServer();

// Create MLet instances and call getRandom on the loaded MBeans

//

for (int i = 0; i < mletInfo.length; i++) {

// Create ObjectName for MLet

//

ObjectName mlet = new ObjectName(mletInfo[i][0]);

server.createMBean("javax.management.loading.MLet", mlet);

System.out.println("MLet = " + mlet);

// Display old library directory and set it to test.classes

//

String libraryDirectory =

(String) server.getAttribute(mlet, "LibraryDirectory");

System.out.println("Old Library Directory = " +

libraryDirectory);

Attribute attribute =

new Attribute("LibraryDirectory", workingDir);

server.setAttribute(mlet, attribute);

libraryDirectory =

(String) server.getAttribute(mlet, "LibraryDirectory");

System.out.println("New Library Directory = " +

libraryDirectory);

// Get MBeans from URL

//

String mletURL = urlCodebase + mletInfo[i][1];

System.out.println("MLet URL = " + mletURL);

Object[] params = new Object[] { mletURL };

String[] signature = new String[] {"java.lang.String"};

Object res[] = ((Set) server.invoke(mlet,

"getMBeansFromURL",

params,

signature)).toArray();

// Iterate through all the loaded MBeans

//

for (int j = 0; j < res.length; j++) {

// Now ensure none of the returned objects is a Throwable

//

if (res[j] instanceof Throwable) {

((Throwable) res[j]).printStackTrace(System.out);

System.out.println("Failed to load the MBean #" + j +

". The shown Throwable was caught.");

System.exit(1);

}

// On each of the loaded MBeans, try to invoke their

// native operation

//

Object result = null;

try {

ObjectName mbean =

((ObjectInstance) res[j]).getObjectName();

result = server.getAttribute(mbean, "Random");

System.out.println("MBean #" + j + " = " + mbean);

System.out.println("Random number = " + result);

} catch (ReflectionException e) {

e.getTargetException().printStackTrace(System.out);

System.out.println("A ReflectionException, wrapping " +

"the shown exception, occured when" +

" attempting to invoke a native " +

"library based operation.");

System.exit(1);

}

}

}

} catch (Exception e) {

e.printStackTrace(System.out);

System.out.println(e.getMessage());

System.out.println("Unexpected error");

System.exit(1);

}

System.out.println("Bye! Bye!");

}

}