Examples with PrivateMLet javax.management.loading.PrivateMLet used on opensource projects

Example 1 with PrivateMLet

use of javax.management.loading.PrivateMLet in project jdk8u_jdk by JetBrains.

the class MXBeanLoadingTest1 method run.

public void run(Map<String, Object> args) {
    System.out.println("MXBeanLoadingTest1::run: Start");
    try {
        System.out.println("We ensure no reference is retained on MXBean class" + " after it is unregistered. We take time to perform" + " some little extra check of Descriptors, MBean*Info.");
        ClassLoader myClassLoader = MXBeanLoadingTest1.class.getClassLoader();
        if (!(myClassLoader instanceof URLClassLoader)) {
            String message = "(ERROR) Test's class loader is not " + "a URLClassLoader";
            System.out.println(message);
            throw new RuntimeException(message);
        }
        URLClassLoader myURLClassLoader = (URLClassLoader) myClassLoader;
        URL[] urls = myURLClassLoader.getURLs();
        PrivateMLet mlet = new PrivateMLet(urls, null, false);
        Class<?> shadowClass = mlet.loadClass(TestMXBean.class.getName());
        if (shadowClass == TestMXBean.class) {
            String message = "(ERROR) MLet got original TestMXBean, not shadow";
            System.out.println(message);
            throw new RuntimeException(message);
        }
        shadowClass = null;
        MBeanServer mbs = MBeanServerFactory.createMBeanServer();
        ObjectName mletName = new ObjectName("x:type=mlet");
        mbs.registerMBean(mlet, mletName);
        ObjectName testName = new ObjectName("x:type=test");
        mbs.createMBean(Test.class.getName(), testName, mletName);
        // That test fails because the MXBean instance is accessed via
        // a delegate OpenMBean which has
        ClassLoader testLoader = mbs.getClassLoaderFor(testName);
        if (testLoader != mlet) {
            System.out.println("MLet " + mlet);
            String message = "(ERROR) MXBean's class loader is not MLet: " + testLoader;
            System.out.println(message);
            throw new RuntimeException(message);
        }
        testLoader = null;
        // Cycle get/set/get of the attribute of type Luis.
        // We check the set is effective.
        CompositeData cd_B = (CompositeData) mbs.getAttribute(testName, "B");
        CompositeType compType_B = cd_B.getCompositeType();
        CompositeDataSupport cds_B = new CompositeDataSupport(compType_B, new String[] { "something" }, new Object[] { Integer.valueOf(13) });
        Attribute myAtt = new Attribute("B", cds_B);
        mbs.setAttribute(testName, myAtt);
        CompositeData cd_B2 = (CompositeData) mbs.getAttribute(testName, "B");
        if (((Integer) cd_B2.get("something")).intValue() != 13) {
            String message = "(ERROR) The setAttribute of att B did not work;" + " expect Luis.something = 13 but got " + cd_B2.get("something");
            System.out.println(message);
            throw new RuntimeException(message);
        }
        MBeanInfo info = mbs.getMBeanInfo(testName);
        String mxbeanField = (String) info.getDescriptor().getFieldValue(JMX.MXBEAN_FIELD);
        if (mxbeanField == null || !mxbeanField.equals("true")) {
            String message = "(ERROR) Improper mxbean field value " + mxbeanField;
            System.out.println(message);
            throw new RuntimeException(message);
        }
        // Check the 2 attributes.
        MBeanAttributeInfo[] attrs = info.getAttributes();
        if (attrs.length == 2) {
            for (MBeanAttributeInfo mbai : attrs) {
                String originalTypeFieldValue = (String) mbai.getDescriptor().getFieldValue(JMX.ORIGINAL_TYPE_FIELD);
                OpenType<?> openTypeFieldValue = (OpenType<?>) mbai.getDescriptor().getFieldValue(JMX.OPEN_TYPE_FIELD);
                if (mbai.getName().equals("A")) {
                    if (!mbai.isReadable() || !mbai.isWritable() || mbai.isIs() || !mbai.getType().equals("int")) {
                        String message = "(ERROR) Unexpected MBeanAttributeInfo for A " + mbai;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                    if (!originalTypeFieldValue.equals("int")) {
                        String message = "(ERROR) Unexpected originalType in Descriptor for A " + originalTypeFieldValue;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                    if (!openTypeFieldValue.equals(SimpleType.INTEGER)) {
                        String message = "(ERROR) Unexpected openType in Descriptor for A " + originalTypeFieldValue;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                } else if (mbai.getName().equals("B")) {
                    if (!mbai.isReadable() || !mbai.isWritable() || mbai.isIs() || !mbai.getType().equals("javax.management.openmbean.CompositeData")) {
                        String message = "(ERROR) Unexpected MBeanAttributeInfo for B " + mbai;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                    if (!originalTypeFieldValue.equals(Luis.class.getName())) {
                        String message = "(ERROR) Unexpected originalType in Descriptor for B " + originalTypeFieldValue;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                    if (!openTypeFieldValue.equals(compType_B)) {
                        String message = "(ERROR) Unexpected openType in Descriptor for B " + compType_B;
                        System.out.println(message);
                        throw new RuntimeException(message);
                    }
                } else {
                    String message = "(ERROR) Unknown attribute name";
                    System.out.println(message);
                    throw new RuntimeException(message);
                }
            }
        } else {
            String message = "(ERROR) Unexpected MBeanAttributeInfo array" + Arrays.deepToString(attrs);
            System.out.println(message);
            throw new RuntimeException(message);
        }
        // Check the MXBean operation.
        MBeanOperationInfo[] ops = info.getOperations();
        // logged 6320104.
        if (ops.length != 1 || !ops[0].getName().equals("bogus") || ops[0].getSignature().length > 0 || !ops[0].getReturnType().equals("void")) {
            String message = "(ERROR) Unexpected MBeanOperationInfo array " + Arrays.deepToString(ops);
            System.out.println(message);
            throw new RuntimeException(message);
        }
        String originalTypeFieldValue = (String) ops[0].getDescriptor().getFieldValue(JMX.ORIGINAL_TYPE_FIELD);
        OpenType<?> openTypeFieldValue = (OpenType<?>) ops[0].getDescriptor().getFieldValue(JMX.OPEN_TYPE_FIELD);
        if (!originalTypeFieldValue.equals("void")) {
            String message = "(ERROR) Unexpected originalType in Descriptor for bogus " + originalTypeFieldValue;
            System.out.println(message);
            throw new RuntimeException(message);
        }
        if (!openTypeFieldValue.equals(SimpleType.VOID)) {
            String message = "(ERROR) Unexpected openType in Descriptor for bogus " + originalTypeFieldValue;
            System.out.println(message);
            throw new RuntimeException(message);
        }
        // Check there is 2 constructors.
        if (info.getConstructors().length != 2) {
            String message = "(ERROR) Wrong number of constructors " + "in introspected bean: " + Arrays.asList(info.getConstructors());
            System.out.println(message);
            throw new RuntimeException(message);
        }
        // Check MXBean class name.
        if (!info.getClassName().endsWith("Test")) {
            String message = "(ERROR) Wrong info class name: " + info.getClassName();
            System.out.println(message);
            throw new RuntimeException(message);
        }
        mbs.unregisterMBean(testName);
        mbs.unregisterMBean(mletName);
        WeakReference<PrivateMLet> mletRef = new WeakReference<PrivateMLet>(mlet);
        mlet = null;
        System.out.println("MXBean registered and unregistered, waiting for " + "garbage collector to collect class loader");
        for (int i = 0; i < 10000 && mletRef.get() != null; i++) {
            System.gc();
            Thread.sleep(1);
        }
        if (mletRef.get() == null)
            System.out.println("(OK) class loader was GC'd");
        else {
            String message = "(ERROR) Class loader was not GC'd";
            System.out.println(message);
            throw new RuntimeException(message);
        }
    } catch (Exception e) {
        Utils.printThrowable(e, true);
        throw new RuntimeException(e);
    }
    System.out.println("MXBeanLoadingTest1::run: Done without any error");
}