Java Code Examples for javax.management.MBeanServer#getMBeanInfo()

private static boolean test(Object mbean, boolean expectImmutable)
        throws Exception {
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName on = new ObjectName("a:b=c");
    mbs.registerMBean(mbean, on);
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    Descriptor d = mbi.getDescriptor();
    String immutableValue = (String) d.getFieldValue("immutableInfo");
    boolean immutable = ("true".equals(immutableValue));
    if (immutable != expectImmutable) {
        System.out.println("FAILED: " + mbean.getClass().getName() +
                " -> " + immutableValue);
        return false;
    } else {
        System.out.println("OK: " + mbean.getClass().getName());
        return true;
    }
}
 

private static boolean test(Object mbean, boolean expectImmutable)
        throws Exception {
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName on = new ObjectName("a:b=c");
    mbs.registerMBean(mbean, on);
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    Descriptor d = mbi.getDescriptor();
    String immutableValue = (String) d.getFieldValue("immutableInfo");
    boolean immutable = ("true".equals(immutableValue));
    if (immutable != expectImmutable) {
        System.out.println("FAILED: " + mbean.getClass().getName() +
                " -> " + immutableValue);
        return false;
    } else {
        System.out.println("OK: " + mbean.getClass().getName());
        return true;
    }
}
 

private static boolean test(Object mbean, boolean expectImmutable)
        throws Exception {
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName on = new ObjectName("a:b=c");
    mbs.registerMBean(mbean, on);
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    Descriptor d = mbi.getDescriptor();
    String immutableValue = (String) d.getFieldValue("immutableInfo");
    boolean immutable = ("true".equals(immutableValue));
    if (immutable != expectImmutable) {
        System.out.println("FAILED: " + mbean.getClass().getName() +
                " -> " + immutableValue);
        return false;
    } else {
        System.out.println("OK: " + mbean.getClass().getName());
        return true;
    }
}
 

/**
 * Invoke an operation
 * @param name The bean name
 * @param index The method index
 * @param args The arguments
 * @return The result
 * @exception JMException Thrown if an error occurs
 */
public static OpResultInfo invokeOp(String name, int index, String[] args) throws JMException
{
   MBeanServer server = getMBeanServer();
   ObjectName objName = new ObjectName(name);
   MBeanInfo info = server.getMBeanInfo(objName);
   MBeanOperationInfo[] opInfo = info.getOperations();
   MBeanOperationInfo op = opInfo[index];
   MBeanParameterInfo[] paramInfo = op.getSignature();
   String[] argTypes = new String[paramInfo.length];

   for (int p = 0; p < paramInfo.length; p++)
      argTypes[p] = paramInfo[p].getType();
 
   return invokeOpByName(name, op.getName(), argTypes, args);
}
 

private static boolean test(Object mbean, boolean expectImmutable)
        throws Exception {
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName on = new ObjectName("a:b=c");
    mbs.registerMBean(mbean, on);
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    Descriptor d = mbi.getDescriptor();
    String immutableValue = (String) d.getFieldValue("immutableInfo");
    boolean immutable = ("true".equals(immutableValue));
    if (immutable != expectImmutable) {
        System.out.println("FAILED: " + mbean.getClass().getName() +
                " -> " + immutableValue);
        return false;
    } else {
        System.out.println("OK: " + mbean.getClass().getName());
        return true;
    }
}
 

private static boolean test(Object mbean, boolean expectImmutable)
        throws Exception {
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName on = new ObjectName("a:b=c");
    mbs.registerMBean(mbean, on);
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    Descriptor d = mbi.getDescriptor();
    String immutableValue = (String) d.getFieldValue("immutableInfo");
    boolean immutable = ("true".equals(immutableValue));
    if (immutable != expectImmutable) {
        System.out.println("FAILED: " + mbean.getClass().getName() +
                " -> " + immutableValue);
        return false;
    } else {
        System.out.println("OK: " + mbean.getClass().getName());
        return true;
    }
}
 

private List<MbeanAttributeValue> getMBeanAttributeValues(String mbeanExpr, String attributeExpr) {
    List<MbeanAttributeValue> values = new ArrayList<>();
    MBeanServer server = ManagementFactory.getPlatformMBeanServer();
    try {
        Set<ObjectName> mbeanNames = server.queryNames(new ObjectName(mbeanExpr), null);
        for (ObjectName mbeanName : mbeanNames) {
            MBeanInfo mBeanInfo = server.getMBeanInfo(mbeanName);
            MBeanAttributeInfo[] attributeInfos = mBeanInfo.getAttributes();
            for (MBeanAttributeInfo attributeInfo : attributeInfos) {
                if (attributeInfo.getName().equals(attributeExpr) || attributeExpr.length() == 0 || attributeExpr.equals("*")) {
                    double value = (Double) server.getAttribute(mbeanName, attributeInfo.getName());
                    values.add(new MbeanAttributeValue(mbeanName.getCanonicalName(), attributeInfo.getName(), value));
                }
            }
        }
    } catch (Exception e) {
        logger.error("", e);
    }
    return values;
}
 

private static void testMXBean(MBeanServer mbs, ObjectName on)
        throws Exception {
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    MBeanAttributeInfo[] attrs = mbi.getAttributes();
    int nattrs = attrs.length;
    if (mbi.getAttributes().length != 1)
        failure("wrong number of attributes: " + attrs);
    else {
        MBeanAttributeInfo mbai = attrs[0];
        if (mbai.getName().equals("Ints")
            && mbai.isReadable() && !mbai.isWritable()
            && mbai.getDescriptor().getFieldValue("openType")
                .equals(new ArrayType<int[]>(SimpleType.INTEGER, true))
            && attrs[0].getType().equals("[I"))
            success("MBeanAttributeInfo");
        else
            failure("MBeanAttributeInfo: " + mbai);
    }

    int[] ints = (int[]) mbs.getAttribute(on, "Ints");
    if (equal(ints, new int[] {1, 2, 3}, null))
        success("getAttribute");
    else
        failure("getAttribute: " + Arrays.toString(ints));

    ExplicitMXBean proxy =
        JMX.newMXBeanProxy(mbs, on, ExplicitMXBean.class);
    int[] pints = proxy.getInts();
    if (equal(pints, new int[] {1, 2, 3}, null))
        success("getAttribute through proxy");
    else
        failure("getAttribute through proxy: " + Arrays.toString(pints));
}
 

@Test
public void testJmxMBeanInfo() throws Exception {
    MBeanServer platformMBeanServer = ManagementFactory.getPlatformMBeanServer();
    MBeanInfo mBeanInfo = platformMBeanServer.getMBeanInfo(JavaMailJMSStatistics.JMX_OBJECT_NAME);
    // no exceptions = ok
    assertNotNull(mBeanInfo);
}
 

private void set(final String cmd) {
    final String[] split = cmd.split(" ");
    if (split.length < 2) {
        streamManager.writeErr("you need to specify an attribute, an objectname and a value");
        return;
    }

    final MBeanServer mBeanServer = LocalMBeanServer.get();
    final String newValue = cmd.substring(split[0].length() + split[1].length() + 1).trim();
    try {
        final ObjectName oname = new ObjectName(split[1]);
        final MBeanInfo minfo = mBeanServer.getMBeanInfo(oname);
        final MBeanAttributeInfo attrs[] = minfo.getAttributes();

        String type = String.class.getName();
        for (int i = 0; i < attrs.length; i++) {
            if (attrs[i].getName().equals(split[0])) {
                type = attrs[i].getType();
                break;
            }
        }

        final Object valueObj = propertyEditorRegistry.getValue(type, newValue, Thread.currentThread().getContextClassLoader());
        mBeanServer.setAttribute(oname, new Attribute(split[0], valueObj));
        streamManager.writeOut("done");
    } catch (Exception ex) {
        streamManager.writeOut("Error - " + ex.toString());
    }
}
 

private static void testMXBean(MBeanServer mbs, ObjectName on)
        throws Exception {
    MBeanInfo mbi = mbs.getMBeanInfo(on);
    MBeanAttributeInfo[] attrs = mbi.getAttributes();
    int nattrs = attrs.length;
    if (mbi.getAttributes().length != 1)
        failure("wrong number of attributes: " + attrs);
    else {
        MBeanAttributeInfo mbai = attrs[0];
        if (mbai.getName().equals("Ints")
            && mbai.isReadable() && !mbai.isWritable()
            && mbai.getDescriptor().getFieldValue("openType")
                .equals(new ArrayType<int[]>(SimpleType.INTEGER, true))
            && attrs[0].getType().equals("[I"))
            success("MBeanAttributeInfo");
        else
            failure("MBeanAttributeInfo: " + mbai);
    }

    int[] ints = (int[]) mbs.getAttribute(on, "Ints");
    if (equal(ints, new int[] {1, 2, 3}, null))
        success("getAttribute");
    else
        failure("getAttribute: " + Arrays.toString(ints));

    ExplicitMXBean proxy =
        JMX.newMXBeanProxy(mbs, on, ExplicitMXBean.class);
    int[] pints = proxy.getInts();
    if (equal(pints, new int[] {1, 2, 3}, null))
        success("getAttribute through proxy");
    else
        failure("getAttribute through proxy: " + Arrays.toString(pints));
}
 

private static void checkMBean(MBeanServer mbs, String mbeanName)
        throws Exception {
    try {
        ObjectName objName = new ObjectName(mbeanName);
        // We could call mbs.isRegistered(objName) here.
        // Calling getMBeanInfo will throw exception if not found.
        mbs.getMBeanInfo(objName);
    } catch (Exception e) {
        throw e;
    }
}
 

private static void test(Object child, String name, boolean mxbean)
    throws Exception {
    final ObjectName childName =
            new ObjectName("test:type=Child,name="+name);
    final MBeanServer server =
            ManagementFactory.getPlatformMBeanServer();
    server.registerMBean(child,childName);
    try {
        final MBeanInfo info = server.getMBeanInfo(childName);
        System.out.println(name+": " + info.getDescriptor());
        final int len = info.getOperations().length;
        if (len == OPCOUNT) {
            System.out.println(name+": OK, only "+OPCOUNT+
                    " operations here...");
        } else {
            final String qual = (len>OPCOUNT)?"many":"few";
            System.err.println(name+": Too "+qual+" foos! Found "+
                    len+", expected "+OPCOUNT);
            for (MBeanOperationInfo op : info.getOperations()) {
                System.err.println("public "+op.getReturnType()+" "+
                        op.getName()+"();");
            }
            throw new RuntimeException("Too " + qual +
                    " foos for "+name);
        }

        final Descriptor d = info.getDescriptor();
        final String mxstr = String.valueOf(d.getFieldValue("mxbean"));
        final boolean mxb =
                (mxstr==null)?false:Boolean.valueOf(mxstr).booleanValue();
        System.out.println(name+": mxbean="+mxb);
        if (mxbean && !mxb)
            throw new AssertionError("MXBean is not OpenMBean?");

        for (MBeanOperationInfo mboi : info.getOperations()) {

            // Sanity check
            if (mxbean && !mboi.getName().equals("foo")) {
                // The spec doesn't guarantee that the MBeanOperationInfo
                // of an MXBean will be an OpenMBeanOperationInfo, and in
                // some circumstances in our implementation it will not.
                // However, in thsi tests, for all methods but foo(),
                // it should.
                //
                if (!(mboi instanceof OpenMBeanOperationInfo))
                    throw new AssertionError("Operation "+mboi.getName()+
                            "() is not Open?");
            }

            final String exp = EXPECTED_TYPES.get(mboi.getName());

            // For MXBeans, we need to compare 'exp' with the original
            // type - because mboi.getReturnType() returns the OpenType
            //
            String type = (String)mboi.getDescriptor().
                        getFieldValue("originalType");
            if (type == null) type = mboi.getReturnType();
            if (type.equals(exp)) continue;
            System.err.println("Bad return type for "+
                    mboi.getName()+"! Found "+type+
                    ", expected "+exp);
            throw new RuntimeException("Bad return type for "+
                    mboi.getName());
        }
    } finally {
        server.unregisterMBean(childName);
    }
}
 

@Override
public void run() {
    if (count >= getNumOfExecutions()) {
        // stop the timer
        timer.cancel();
        timer.purge();
        process.write("Process ends after " + getNumOfExecutions() + " time(s).\n");
        process.end();
        return;
    }

    try {
        MBeanServer platformMBeanServer = ManagementFactory.getPlatformMBeanServer();
        Set<ObjectName> objectNames = queryObjectNames();
        TableElement table = createTable();
        for (ObjectName objectName : objectNames) {
            MBeanInfo mBeanInfo = platformMBeanServer.getMBeanInfo(objectName);
            MBeanAttributeInfo[] attributes = mBeanInfo.getAttributes();
            for (MBeanAttributeInfo attribute : attributes) {
                String attributeName = attribute.getName();
                if (!getAttributeMatcher().matching(attributeName)) {
                    continue;
                }
                String value;
                if (!attribute.isReadable()) {
                    value = RenderUtil.render(new LabelElement("Unavailable").style(Decoration.bold_off.fg(Color.red)));
                } else {
                    Object attributeObj = platformMBeanServer.getAttribute(objectName, attributeName);
                    value = String.valueOf(attributeObj);
                }
                table.row(attributeName, value);
            }
            process.write(RenderUtil.render(table, process.width()));
            process.write("\n");
        }
    } catch (Throwable e) {
        logger.warn("mbean error", e);
    }

    count++;
    process.times().incrementAndGet();

    if (getInterval() <= 0) {
        stop();
        process.end();
    }
}
 

private static void test(Object child, String name, boolean mxbean)
    throws Exception {
    final ObjectName childName =
            new ObjectName("test:type=Child,name="+name);
    final MBeanServer server =
            ManagementFactory.getPlatformMBeanServer();
    server.registerMBean(child,childName);
    try {
        final MBeanInfo info = server.getMBeanInfo(childName);
        System.out.println(name+": " + info.getDescriptor());
        final int len = info.getOperations().length;
        if (len == OPCOUNT) {
            System.out.println(name+": OK, only "+OPCOUNT+
                    " operations here...");
        } else {
            final String qual = (len>OPCOUNT)?"many":"few";
            System.err.println(name+": Too "+qual+" foos! Found "+
                    len+", expected "+OPCOUNT);
            for (MBeanOperationInfo op : info.getOperations()) {
                System.err.println("public "+op.getReturnType()+" "+
                        op.getName()+"();");
            }
            throw new RuntimeException("Too " + qual +
                    " foos for "+name);
        }

        final Descriptor d = info.getDescriptor();
        final String mxstr = String.valueOf(d.getFieldValue("mxbean"));
        final boolean mxb =
                (mxstr==null)?false:Boolean.valueOf(mxstr).booleanValue();
        System.out.println(name+": mxbean="+mxb);
        if (mxbean && !mxb)
            throw new AssertionError("MXBean is not OpenMBean?");

        for (MBeanOperationInfo mboi : info.getOperations()) {

            // Sanity check
            if (mxbean && !mboi.getName().equals("foo")) {
                // The spec doesn't guarantee that the MBeanOperationInfo
                // of an MXBean will be an OpenMBeanOperationInfo, and in
                // some circumstances in our implementation it will not.
                // However, in thsi tests, for all methods but foo(),
                // it should.
                //
                if (!(mboi instanceof OpenMBeanOperationInfo))
                    throw new AssertionError("Operation "+mboi.getName()+
                            "() is not Open?");
            }

            final String exp = EXPECTED_TYPES.get(mboi.getName());

            // For MXBeans, we need to compare 'exp' with the original
            // type - because mboi.getReturnType() returns the OpenType
            //
            String type = (String)mboi.getDescriptor().
                        getFieldValue("originalType");
            if (type == null) type = mboi.getReturnType();
            if (type.equals(exp)) continue;
            System.err.println("Bad return type for "+
                    mboi.getName()+"! Found "+type+
                    ", expected "+exp);
            throw new RuntimeException("Bad return type for "+
                    mboi.getName());
        }
    } finally {
        server.unregisterMBean(childName);
    }
}
 

public static void main(String[] args) throws Exception {
    TestMXBean testImpl = (TestMXBean) Proxy.newProxyInstance(
            TestMXBean.class.getClassLoader(), new Class<?>[] {TestMXBean.class}, nullIH);
    Object mxbean = new StandardMBean(testImpl, TestMXBean.class, true);
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName name = new ObjectName("a:b=c");
    mbs.registerMBean(mxbean, name);
    MBeanInfo mbi = mbs.getMBeanInfo(name);
    MBeanAttributeInfo[] mbais = mbi.getAttributes();
    boolean sawTabular = false;
    for (MBeanAttributeInfo mbai : mbais) {
        String attrName = mbai.getName();
        String attrTypeName = (String) mbai.getDescriptor().getFieldValue("originalType");
        String fieldName = attrName + "Name";
        Field nameField = TestMXBean.class.getField(fieldName);
        String expectedTypeName = (String) nameField.get(null);

        if (expectedTypeName.equals(attrTypeName)) {
            System.out.println("OK: " + attrName + ": " + attrTypeName);
        } else {
            fail("For attribute " + attrName + " expected type name \"" +
                    expectedTypeName + "\", found type name \"" + attrTypeName +
                    "\"");
        }

        if (mbai.getType().equals(TabularData.class.getName())) {
            sawTabular = true;
            TabularType tt = (TabularType) mbai.getDescriptor().getFieldValue("openType");
            if (tt.getTypeName().equals(attrTypeName)) {
                System.out.println("OK: TabularType name for " + attrName);
            } else {
                fail("For attribute " + attrName + " expected TabularType " +
                        "name \"" + attrTypeName + "\", found \"" +
                        tt.getTypeName());
            }
        }
    }

    if (!sawTabular)
        fail("Test bug: did not test TabularType name");

    if (failure == null)
        System.out.println("TEST PASSED");
    else
        throw new Exception("TEST FAILED: " + failure);
}
 

/** Test.
 * @throws IOException e
 * @throws JMException e */
@Test
public void testToHtml() throws IOException, JMException {
	final MBeanServer mBeanServer = ManagementFactory.getPlatformMBeanServer();
	final List<ObjectName> mBeans = new ArrayList<ObjectName>();
	try {
		final ObjectInstance mBean1 = mBeanServer.registerMBean(new ThreadPool(),
				new ObjectName("Catalina:type=ThreadPool"));
		mBeans.add(mBean1.getObjectName());

		final ObjectInstance mBean2 = mBeanServer.registerMBean(new GlobalRequestProcessor(),
				new ObjectName("Catalina:type=GlobalRequestProcessor,name=http-8080"));
		mBeans.add(mBean2.getObjectName());

		final ObjectInstance mBean3 = mBeanServer.registerMBean(new GlobalRequestProcessor(),
				new ObjectName("Catalina:type=GlobalRequestProcessor,name=http-8090"));
		mBeans.add(mBean3.getObjectName());

		final ObjectInstance mBean4 = mBeanServer.registerMBean(new EmptyAttribute(),
				new ObjectName("java.lang:type=Object"));
		mBeans.add(mBean4.getObjectName());

		// test name avec "|"
		final ObjectInstance mBean5 = mBeanServer.registerMBean(new GlobalRequestProcessor(),
				new ObjectName("testseparator" + MBeans.ATTRIBUTES_SEPARATOR
						+ "testseparator:type=X"));
		mBeans.add(mBean5.getObjectName());

		// on force à null une des descriptions de bean et une des descriptions d'attribut
		final MBeanInfo mbeanInfo = mBeanServer.getMBeanInfo(mBeans.get(0));
		setFieldValue(mbeanInfo, "description", null);
		final MBeanAttributeInfo mbeanAttributeInfo0 = mbeanInfo.getAttributes()[0];
		// même description que le nom de l'attribut
		setFieldValue(mbeanAttributeInfo0, "description", "maxThreads");
		final MBeanAttributeInfo mbeanAttributeInfo1 = mbeanInfo.getAttributes()[1];
		setFieldValue(mbeanAttributeInfo1, "description", null);

		// register another mbeanServer
		MBeanServerFactory.createMBeanServer("jboss");

		final StringWriter writer = new StringWriter();
		final List<MBeanNode> mbeans = MBeans.getAllMBeanNodes();
		final HtmlMBeansReport report = new HtmlMBeansReport(mbeans, writer);
		report.toHtml();
		assertNotEmptyAndClear(writer);
	} catch (final IllegalAccessException e) {
		throw new IllegalStateException(e);
	} finally {
		for (final ObjectName registeredMBean : mBeans) {
			mBeanServer.unregisterMBean(registeredMBean);
		}
	}
}
 

public static void main(String[] args) throws Exception {
    TestMXBean testImpl = (TestMXBean) Proxy.newProxyInstance(
            TestMXBean.class.getClassLoader(), new Class<?>[] {TestMXBean.class}, nullIH);
    Object mxbean = new StandardMBean(testImpl, TestMXBean.class, true);
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName name = new ObjectName("a:b=c");
    mbs.registerMBean(mxbean, name);
    MBeanInfo mbi = mbs.getMBeanInfo(name);
    MBeanAttributeInfo[] mbais = mbi.getAttributes();
    boolean sawTabular = false;
    for (MBeanAttributeInfo mbai : mbais) {
        String attrName = mbai.getName();
        String attrTypeName = (String) mbai.getDescriptor().getFieldValue("originalType");
        String fieldName = attrName + "Name";
        Field nameField = TestMXBean.class.getField(fieldName);
        String expectedTypeName = (String) nameField.get(null);

        if (expectedTypeName.equals(attrTypeName)) {
            System.out.println("OK: " + attrName + ": " + attrTypeName);
        } else {
            fail("For attribute " + attrName + " expected type name \"" +
                    expectedTypeName + "\", found type name \"" + attrTypeName +
                    "\"");
        }

        if (mbai.getType().equals(TabularData.class.getName())) {
            sawTabular = true;
            TabularType tt = (TabularType) mbai.getDescriptor().getFieldValue("openType");
            if (tt.getTypeName().equals(attrTypeName)) {
                System.out.println("OK: TabularType name for " + attrName);
            } else {
                fail("For attribute " + attrName + " expected TabularType " +
                        "name \"" + attrTypeName + "\", found \"" +
                        tt.getTypeName());
            }
        }
    }

    if (!sawTabular)
        fail("Test bug: did not test TabularType name");

    if (failure == null)
        System.out.println("TEST PASSED");
    else
        throw new Exception("TEST FAILED: " + failure);
}
 

private static void test(Object child, String name, boolean mxbean)
    throws Exception {
    final ObjectName childName =
            new ObjectName("test:type=Child,name="+name);
    final MBeanServer server =
            ManagementFactory.getPlatformMBeanServer();
    server.registerMBean(child,childName);
    try {
        final MBeanInfo info = server.getMBeanInfo(childName);
        System.out.println(name+": " + info.getDescriptor());
        final int len = info.getOperations().length;
        if (len == OPCOUNT) {
            System.out.println(name+": OK, only "+OPCOUNT+
                    " operations here...");
        } else {
            final String qual = (len>OPCOUNT)?"many":"few";
            System.err.println(name+": Too "+qual+" foos! Found "+
                    len+", expected "+OPCOUNT);
            for (MBeanOperationInfo op : info.getOperations()) {
                System.err.println("public "+op.getReturnType()+" "+
                        op.getName()+"();");
            }
            throw new RuntimeException("Too " + qual +
                    " foos for "+name);
        }

        final Descriptor d = info.getDescriptor();
        final String mxstr = String.valueOf(d.getFieldValue("mxbean"));
        final boolean mxb =
                (mxstr==null)?false:Boolean.valueOf(mxstr).booleanValue();
        System.out.println(name+": mxbean="+mxb);
        if (mxbean && !mxb)
            throw new AssertionError("MXBean is not OpenMBean?");

        for (MBeanOperationInfo mboi : info.getOperations()) {

            // Sanity check
            if (mxbean && !mboi.getName().equals("foo")) {
                // The spec doesn't guarantee that the MBeanOperationInfo
                // of an MXBean will be an OpenMBeanOperationInfo, and in
                // some circumstances in our implementation it will not.
                // However, in thsi tests, for all methods but foo(),
                // it should.
                //
                if (!(mboi instanceof OpenMBeanOperationInfo))
                    throw new AssertionError("Operation "+mboi.getName()+
                            "() is not Open?");
            }

            final String exp = EXPECTED_TYPES.get(mboi.getName());

            // For MXBeans, we need to compare 'exp' with the original
            // type - because mboi.getReturnType() returns the OpenType
            //
            String type = (String)mboi.getDescriptor().
                        getFieldValue("originalType");
            if (type == null) type = mboi.getReturnType();
            if (type.equals(exp)) continue;
            System.err.println("Bad return type for "+
                    mboi.getName()+"! Found "+type+
                    ", expected "+exp);
            throw new RuntimeException("Bad return type for "+
                    mboi.getName());
        }
    } finally {
        server.unregisterMBean(childName);
    }
}
 

public static void main(String[] args) throws Exception {
    TestMXBean testImpl = (TestMXBean) Proxy.newProxyInstance(
            TestMXBean.class.getClassLoader(), new Class<?>[] {TestMXBean.class}, nullIH);
    Object mxbean = new StandardMBean(testImpl, TestMXBean.class, true);
    MBeanServer mbs = MBeanServerFactory.newMBeanServer();
    ObjectName name = new ObjectName("a:b=c");
    mbs.registerMBean(mxbean, name);
    MBeanInfo mbi = mbs.getMBeanInfo(name);
    MBeanAttributeInfo[] mbais = mbi.getAttributes();
    boolean sawTabular = false;
    for (MBeanAttributeInfo mbai : mbais) {
        String attrName = mbai.getName();
        String attrTypeName = (String) mbai.getDescriptor().getFieldValue("originalType");
        String fieldName = attrName + "Name";
        Field nameField = TestMXBean.class.getField(fieldName);
        String expectedTypeName = (String) nameField.get(null);

        if (expectedTypeName.equals(attrTypeName)) {
            System.out.println("OK: " + attrName + ": " + attrTypeName);
        } else {
            fail("For attribute " + attrName + " expected type name \"" +
                    expectedTypeName + "\", found type name \"" + attrTypeName +
                    "\"");
        }

        if (mbai.getType().equals(TabularData.class.getName())) {
            sawTabular = true;
            TabularType tt = (TabularType) mbai.getDescriptor().getFieldValue("openType");
            if (tt.getTypeName().equals(attrTypeName)) {
                System.out.println("OK: TabularType name for " + attrName);
            } else {
                fail("For attribute " + attrName + " expected TabularType " +
                        "name \"" + attrTypeName + "\", found \"" +
                        tt.getTypeName());
            }
        }
    }

    if (!sawTabular)
        fail("Test bug: did not test TabularType name");

    if (failure == null)
        System.out.println("TEST PASSED");
    else
        throw new Exception("TEST FAILED: " + failure);
}