Java example source code file (OldMBeanServerTest.java)
The OldMBeanServerTest.java Java example source code/*
* Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.management.ManagementFactory;
import java.lang.ref.WeakReference;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.DynamicMBean;
import javax.management.InstanceAlreadyExistsException;
import javax.management.InstanceNotFoundException;
import javax.management.IntrospectionException;
import javax.management.InvalidAttributeValueException;
import javax.management.ListenerNotFoundException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanConstructorInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.MBeanNotificationInfo;
import javax.management.MBeanOperationInfo;
import javax.management.MBeanRegistration;
import javax.management.MBeanRegistrationException;
import javax.management.MBeanServer;
import javax.management.MBeanServerBuilder;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerDelegate;
import javax.management.MBeanServerFactory;
import javax.management.MBeanServerNotification;
import javax.management.MalformedObjectNameException;
import javax.management.NotCompliantMBeanException;
import javax.management.Notification;
import javax.management.NotificationBroadcaster;
import javax.management.NotificationBroadcasterSupport;
import javax.management.NotificationEmitter;
import javax.management.NotificationFilter;
import javax.management.NotificationListener;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.OperationsException;
import javax.management.QueryEval;
import javax.management.QueryExp;
import javax.management.ReflectionException;
import javax.management.RuntimeErrorException;
import javax.management.RuntimeMBeanException;
import javax.management.StandardMBean;
import javax.management.loading.ClassLoaderRepository;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;
/*
* @test OldMBeanServerTest.java
* @bug 5072268
* @summary Test that nothing assumes a post-1.2 MBeanServer
* @author Eamonn McManus
* @run main/othervm -ea OldMBeanServerTest
*/
/*
* We defined the MBeanServerBuilder class and the associated system
* property javax.management.builder.initial in version 1.2 of the JMX
* spec. That amounts to a guarantee that someone can set the property
* to an MBeanServer that only knows about JMX 1.2 semantics, and if they
* only do JMX 1.2 operations, everything should work. This test is a
* sanity check that ensures we don't inadvertently make any API changes
* that stop that from being true. It includes a complete (if slow)
* MBeanServer implementation. That implementation doesn't replicate the
* mandated exception behaviour everywhere, though, since there's lots of
* arbitrary cruft in that. Also, the behaviour of concurrent unregisterMBean
* calls is incorrect in detail.
*/
public class OldMBeanServerTest {
private static MBeanServerConnection mbsc;
private static String failure;
public static void main(String[] args) throws Exception {
if (!OldMBeanServerTest.class.desiredAssertionStatus())
throw new Exception("Test must be run with -ea");
System.setProperty("javax.management.builder.initial",
OldMBeanServerBuilder.class.getName());
assert MBeanServerFactory.newMBeanServer() instanceof OldMBeanServer;
System.out.println("=== RUNNING TESTS WITH LOCAL MBEANSERVER ===");
runTests(new Callable<MBeanServerConnection>() {
public MBeanServerConnection call() {
return MBeanServerFactory.newMBeanServer();
}
}, null);
System.out.println("=== RUNNING TESTS THROUGH CONNECTOR ===");
ConnectionBuilder builder = new ConnectionBuilder();
runTests(builder, builder);
if (failure == null)
System.out.println("TEST PASSED");
else
throw new Exception("TEST FAILED: " + failure);
}
private static class ConnectionBuilder
implements Callable<MBeanServerConnection>, Runnable {
private JMXConnector connector;
public MBeanServerConnection call() {
MBeanServer mbs = MBeanServerFactory.newMBeanServer();
try {
JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://");
JMXConnectorServer cs =
JMXConnectorServerFactory.newJMXConnectorServer(
url, null, mbs);
cs.start();
JMXServiceURL addr = cs.getAddress();
connector = JMXConnectorFactory.connect(addr);
return connector.getMBeanServerConnection();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public void run() {
if (connector != null) {
try {
connector.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
private static void runTests(
Callable<MBeanServerConnection> maker, Runnable breaker)
throws Exception {
for (Method m : OldMBeanServerTest.class.getDeclaredMethods()) {
if (Modifier.isStatic(m.getModifiers()) &&
m.getName().startsWith("test") &&
m.getParameterTypes().length == 0) {
ExpectException expexc = m.getAnnotation(ExpectException.class);
mbsc = maker.call();
try {
m.invoke(null);
if (expexc != null) {
failure =
m.getName() + " did not got expected exception " +
expexc.value().getName();
System.out.println(failure);
} else
System.out.println(m.getName() + " OK");
} catch (InvocationTargetException ite) {
Throwable t = ite.getCause();
String prob = null;
if (expexc != null) {
if (expexc.value().isInstance(t)) {
System.out.println(m.getName() + " OK (got expected " +
expexc.value().getName() + ")");
} else
prob = "got wrong exception";
} else
prob = "got exception";
if (prob != null) {
failure = m.getName() + ": " + prob + " " +
t.getClass().getName();
System.out.println(failure);
t.printStackTrace(System.out);
}
} finally {
if (breaker != null)
breaker.run();
}
}
}
}
@Retention(RetentionPolicy.RUNTIME)
private static @interface ExpectException {
Class<? extends Exception> value();
}
public static interface BoringMBean {
public String getName();
public int add(int x, int y);
}
// This class is Serializable so we can createMBean a StandardMBean
// that contains it. Not recommended practice in general --
// should we have a StandardMBean constructor that takes a class
// name and constructor parameters?
public static class Boring implements BoringMBean, Serializable {
public String getName() {
return "Jessica";
}
public int add(int x, int y) {
return x + y;
}
}
public static interface BoringNotifierMBean extends BoringMBean {
public void send();
}
public static class BoringNotifier
extends Boring implements BoringNotifierMBean, NotificationBroadcaster {
private final NotificationBroadcasterSupport nbs =
new NotificationBroadcasterSupport();
public void addNotificationListener(
NotificationListener listener, NotificationFilter filter, Object handback)
throws IllegalArgumentException {
nbs.addNotificationListener(listener, filter, handback);
}
public void removeNotificationListener(NotificationListener listener)
throws ListenerNotFoundException {
nbs.removeNotificationListener(listener);
}
public MBeanNotificationInfo[] getNotificationInfo() {
return null;
}
public void send() {
Notification n = new Notification("type.type", this, 0L);
nbs.sendNotification(n);
}
}
private static class CountListener implements NotificationListener {
volatile int count;
public void handleNotification(Notification n, Object h) {
if (h == null)
h = 1;
count += (Integer) h;
}
void waitForCount(int expect) throws InterruptedException {
long deadline = System.currentTimeMillis() + 2000L;
while (count < expect && System.currentTimeMillis() < deadline)
Thread.sleep(1);
assert count == expect;
}
}
private static void testBasic() throws Exception {
CountListener countListener = new CountListener();
mbsc.addNotificationListener(
MBeanServerDelegate.DELEGATE_NAME, countListener, null, null);
assert countListener.count == 0;
ObjectName name = new ObjectName("a:b=c");
if (mbsc instanceof MBeanServer)
((MBeanServer) mbsc).registerMBean(new Boring(), name);
else
mbsc.createMBean(Boring.class.getName(), name);
countListener.waitForCount(1);
assert mbsc.isRegistered(name);
assert mbsc.queryNames(null, null).contains(name);
assert mbsc.getAttribute(name, "Name").equals("Jessica");
assert mbsc.invoke(
name, "add", new Object[] {2, 3}, new String[] {"int", "int"})
.equals(5);
mbsc.unregisterMBean(name);
countListener.waitForCount(2);
assert !mbsc.isRegistered(name);
assert !mbsc.queryNames(null, null).contains(name);
mbsc.createMBean(BoringNotifier.class.getName(), name);
countListener.waitForCount(3);
CountListener boringListener = new CountListener();
class AlwaysNotificationFilter implements NotificationFilter {
public boolean isNotificationEnabled(Notification notification) {
return true;
}
}
mbsc.addNotificationListener(
name, boringListener, new AlwaysNotificationFilter(), 5);
mbsc.invoke(name, "send", null, null);
boringListener.waitForCount(5);
}
private static void testPrintAttrs() throws Exception {
printAttrs(mbsc, null);
}
private static void testPlatformMBeanServer() throws Exception {
MBeanServer pmbs = ManagementFactory.getPlatformMBeanServer();
assert pmbs instanceof OldMBeanServer;
// Preceding assertion could be violated if at some stage we wrap
// the Platform MBeanServer. In that case we can still check that
// it is ultimately an OldMBeanServer for example by adding a
// counter to getAttribute and checking that it is incremented
// when we call pmbs.getAttribute.
printAttrs(pmbs, UnsupportedOperationException.class);
ObjectName memoryMXBeanName =
new ObjectName(ManagementFactory.MEMORY_MXBEAN_NAME);
pmbs.invoke(memoryMXBeanName, "gc", null, null);
}
private static void printAttrs(
MBeanServerConnection mbsc1, Class<? extends Exception> expectX)
throws Exception {
Set<ObjectName> names = mbsc1.queryNames(null, null);
for (ObjectName name : names) {
System.out.println(name + ":");
MBeanInfo mbi = mbsc1.getMBeanInfo(name);
MBeanAttributeInfo[] mbais = mbi.getAttributes();
for (MBeanAttributeInfo mbai : mbais) {
String attr = mbai.getName();
Object value;
try {
value = mbsc1.getAttribute(name, attr);
} catch (Exception e) {
if (expectX != null && expectX.isInstance(e))
value = "<" + e + ">";
else
throw e;
}
String s = " " + attr + " = " + value;
if (s.length() > 80)
s = s.substring(0, 77) + "...";
System.out.println(s);
}
}
}
private static void testJavaxManagementStandardMBean() throws Exception {
ObjectName name = new ObjectName("a:b=c");
Object mbean = new StandardMBean(new Boring(), BoringMBean.class);
mbsc.createMBean(
StandardMBean.class.getName(), name,
new Object[] {new Boring(), BoringMBean.class},
new String[] {Object.class.getName(), Class.class.getName()});
assert mbsc.getAttribute(name, "Name").equals("Jessica");
assert mbsc.invoke(
name, "add", new Object[] {2, 3}, new String[] {"int", "int"})
.equals(5);
mbsc.unregisterMBean(name);
}
private static void testConnector() throws Exception {
}
public static class OldMBeanServerBuilder extends MBeanServerBuilder {
public MBeanServer newMBeanServer(
String defaultDomain, MBeanServer outer, MBeanServerDelegate delegate) {
return new OldMBeanServer(defaultDomain, delegate);
}
}
public static class OldMBeanServer implements MBeanServer {
// We pretend there's a ClassLoader MBean representing the Class Loader
// Repository and intercept references to it where necessary to keep up
// the pretence. This allows us to fake the right behaviour for
// the omitted-ClassLoader versions of createMBean and instantiate
// (which are not the same as passing a null for the ClassLoader parameter
// of the versions that have one).
private static final ObjectName clrName;
static {
try {
clrName =
new ObjectName("JMImplementation:type=ClassLoaderRepository");
} catch (MalformedObjectNameException e) {
throw new RuntimeException(e);
}
}
private final ConcurrentMap<ObjectName, DynamicMBean> mbeans =
new ConcurrentHashMap<ObjectName, DynamicMBean>();
private final ConcurrentMap<ObjectName, ListenerTable> listenerMap =
new ConcurrentHashMap<ObjectName, ListenerTable>();
private final String defaultDomain;
private final MBeanServerDelegate delegate;
private final ClassLoaderRepositoryImpl clr =
new ClassLoaderRepositoryImpl();
OldMBeanServer(String defaultDomain, MBeanServerDelegate delegate) {
this.defaultDomain = defaultDomain;
this.delegate = delegate;
try {
registerMBean(delegate, MBeanServerDelegate.DELEGATE_NAME);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public ObjectInstance createMBean(String className, ObjectName name)
throws ReflectionException, InstanceAlreadyExistsException,
MBeanRegistrationException, MBeanException,
NotCompliantMBeanException {
return createMBean(className, name, null, null);
}
public ObjectInstance createMBean(
String className, ObjectName name, ObjectName loaderName)
throws ReflectionException, InstanceAlreadyExistsException,
MBeanRegistrationException, MBeanException,
NotCompliantMBeanException, InstanceNotFoundException {
return createMBean(className, name, loaderName, null, null);
}
public ObjectInstance createMBean(
String className, ObjectName name, Object[] params, String[] signature)
throws ReflectionException, InstanceAlreadyExistsException,
MBeanRegistrationException, MBeanException,
NotCompliantMBeanException {
try {
return createMBean(className, name, clrName, params, signature);
} catch (InstanceNotFoundException ex) {
throw new RuntimeException(ex); // can't happen
}
}
public ObjectInstance createMBean(
String className, ObjectName name, ObjectName loaderName,
Object[] params, String[] signature)
throws ReflectionException, InstanceAlreadyExistsException,
MBeanRegistrationException, MBeanException,
NotCompliantMBeanException, InstanceNotFoundException {
Object mbean = instantiate(className, loaderName, params, signature);
return registerMBean(mbean, name);
}
private void forbidJMImpl(ObjectName name) {
if (name.getDomain().equals("JMImplementation") &&
mbeans.containsKey(MBeanServerDelegate.DELEGATE_NAME))
throw new IllegalArgumentException("JMImplementation reserved");
}
public ObjectInstance registerMBean(Object object, ObjectName name)
throws InstanceAlreadyExistsException, MBeanRegistrationException,
NotCompliantMBeanException {
forbidJMImpl(name);
if (name.isPattern())
throw new IllegalArgumentException(name.toString());
// This is the only place we check for wildcards. Since you
// can't register a wildcard name, other operations that supply
// one will get InstanceNotFoundException when they look it up.
DynamicMBean mbean;
if (object instanceof DynamicMBean)
mbean = (DynamicMBean) object;
else
mbean = standardToDynamic(object);
MBeanRegistration reg = mbeanRegistration(object);
try {
name = reg.preRegister(this, name);
} catch (Exception e) {
throw new MBeanRegistrationException(e);
}
DynamicMBean put = mbeans.putIfAbsent(name, mbean);
if (put != null) {
reg.postRegister(false);
throw new InstanceAlreadyExistsException(name.toString());
}
reg.postRegister(true);
if (object instanceof ClassLoader)
clr.addLoader((ClassLoader) object);
Notification n = new MBeanServerNotification(
MBeanServerNotification.REGISTRATION_NOTIFICATION,
MBeanServerDelegate.DELEGATE_NAME,
0,
name);
delegate.sendNotification(n);
String className = mbean.getMBeanInfo().getClassName();
return new ObjectInstance(name, className);
}
public void unregisterMBean(ObjectName name)
throws InstanceNotFoundException, MBeanRegistrationException {
forbidJMImpl(name);
DynamicMBean mbean = getMBean(name);
if (mbean == null)
throw new InstanceNotFoundException(name.toString());
MBeanRegistration reg = mbeanRegistration(mbean);
try {
reg.preDeregister();
} catch (Exception e) {
throw new MBeanRegistrationException(e);
}
if (!mbeans.remove(name, mbean))
throw new InstanceNotFoundException(name.toString());
// This is incorrect because we've invoked preDeregister
Object userMBean = getUserMBean(mbean);
if (userMBean instanceof ClassLoader)
clr.removeLoader((ClassLoader) userMBean);
Notification n = new MBeanServerNotification(
MBeanServerNotification.REGISTRATION_NOTIFICATION,
MBeanServerDelegate.DELEGATE_NAME,
0,
name);
delegate.sendNotification(n);
reg.postDeregister();
}
public ObjectInstance getObjectInstance(ObjectName name)
throws InstanceNotFoundException {
DynamicMBean mbean = getMBean(name);
return new ObjectInstance(name, mbean.getMBeanInfo().getClassName());
}
private static class TrueQueryExp implements QueryExp {
public boolean apply(ObjectName name) {
return true;
}
public void setMBeanServer(MBeanServer s) {}
}
private static final QueryExp trueQuery = new TrueQueryExp();
public Set<ObjectInstance> queryMBeans(ObjectName name, QueryExp query) {
Set<ObjectInstance> instances = newSet();
if (name == null)
name = ObjectName.WILDCARD;
if (query == null)
query = trueQuery;
MBeanServer oldMBS = QueryEval.getMBeanServer();
try {
query.setMBeanServer(this);
for (ObjectName n : mbeans.keySet()) {
if (name.apply(n)) {
try {
if (query.apply(n))
instances.add(getObjectInstance(n));
} catch (Exception e) {
// OK: Ignore this MBean in the result
}
}
}
} finally {
query.setMBeanServer(oldMBS);
}
return instances;
}
public Set<ObjectName> queryNames(ObjectName name, QueryExp query) {
Set<ObjectInstance> instances = queryMBeans(name, query);
Set<ObjectName> names = newSet();
for (ObjectInstance instance : instances)
names.add(instance.getObjectName());
return names;
}
public boolean isRegistered(ObjectName name) {
return mbeans.containsKey(name);
}
public Integer getMBeanCount() {
return mbeans.size();
}
public Object getAttribute(ObjectName name, String attribute)
throws MBeanException, AttributeNotFoundException,
InstanceNotFoundException, ReflectionException {
return getMBean(name).getAttribute(attribute);
}
public AttributeList getAttributes(ObjectName name, String[] attributes)
throws InstanceNotFoundException, ReflectionException {
return getMBean(name).getAttributes(attributes);
}
public void setAttribute(ObjectName name, Attribute attribute)
throws InstanceNotFoundException, AttributeNotFoundException,
InvalidAttributeValueException, MBeanException,
ReflectionException {
getMBean(name).setAttribute(attribute);
}
public AttributeList setAttributes(
ObjectName name, AttributeList attributes)
throws InstanceNotFoundException, ReflectionException {
return getMBean(name).setAttributes(attributes);
}
public Object invoke(
ObjectName name, String operationName, Object[] params,
String[] signature)
throws InstanceNotFoundException, MBeanException, ReflectionException {
return getMBean(name).invoke(operationName, params, signature);
}
public String getDefaultDomain() {
return defaultDomain;
}
public String[] getDomains() {
Set<String> domains = newSet();
for (ObjectName name : mbeans.keySet())
domains.add(name.getDomain());
return domains.toArray(new String[0]);
}
// ClassCastException if MBean is not a NotificationBroadcaster
public void addNotificationListener(
ObjectName name, NotificationListener listener,
NotificationFilter filter, Object handback)
throws InstanceNotFoundException {
NotificationBroadcaster userMBean =
(NotificationBroadcaster) getUserMBean(name);
NotificationListener wrappedListener =
wrappedListener(name, userMBean, listener);
userMBean.addNotificationListener(wrappedListener, filter, handback);
}
public void addNotificationListener(
ObjectName name, ObjectName listener,
NotificationFilter filter, Object handback)
throws InstanceNotFoundException {
NotificationListener nl =
(NotificationListener) getUserMBean(listener);
addNotificationListener(name, nl, filter, handback);
}
public void removeNotificationListener(
ObjectName name, ObjectName listener)
throws InstanceNotFoundException, ListenerNotFoundException {
NotificationListener nl =
(NotificationListener) getUserMBean(listener);
removeNotificationListener(name, nl);
}
public void removeNotificationListener(
ObjectName name, ObjectName listener,
NotificationFilter filter, Object handback)
throws InstanceNotFoundException, ListenerNotFoundException {
NotificationListener nl =
(NotificationListener) getUserMBean(listener);
removeNotificationListener(name, nl, filter, handback);
}
public void removeNotificationListener(
ObjectName name, NotificationListener listener)
throws InstanceNotFoundException, ListenerNotFoundException {
NotificationBroadcaster userMBean =
(NotificationBroadcaster) getUserMBean(name);
NotificationListener wrappedListener =
wrappedListener(name, userMBean, listener);
userMBean.removeNotificationListener(wrappedListener);
}
public void removeNotificationListener(
ObjectName name, NotificationListener listener,
NotificationFilter filter, Object handback)
throws InstanceNotFoundException, ListenerNotFoundException {
NotificationEmitter userMBean =
(NotificationEmitter) getMBean(name);
NotificationListener wrappedListener =
wrappedListener(name, userMBean, listener);
userMBean.removeNotificationListener(wrappedListener, filter, handback);
}
public MBeanInfo getMBeanInfo(ObjectName name)
throws InstanceNotFoundException, IntrospectionException,
ReflectionException {
return getMBean(name).getMBeanInfo();
}
public boolean isInstanceOf(ObjectName name, String className)
throws InstanceNotFoundException {
DynamicMBean mbean = getMBean(name);
String mbeanClassName = mbean.getMBeanInfo().getClassName();
if (className.equals(mbeanClassName))
return true;
ClassLoader loader = getUserMBean(mbean).getClass().getClassLoader();
try {
Class<?> mbeanClass = Class.forName(mbeanClassName, false, loader);
Class<?> isInstClass = Class.forName(className, false, loader);
return isInstClass.isAssignableFrom(mbeanClass);
} catch (ClassNotFoundException e) {
return false;
}
}
public Object instantiate(String className)
throws ReflectionException, MBeanException {
return instantiate(className, null, null);
}
public Object instantiate(String className, ObjectName loaderName)
throws ReflectionException, MBeanException, InstanceNotFoundException {
return instantiate(className, loaderName, null, null);
}
public Object instantiate(
String className, Object[] params, String[] signature)
throws ReflectionException, MBeanException {
try {
return instantiate(className, clrName, params, signature);
} catch (InstanceNotFoundException e) {
throw new RuntimeException(e); // can't happen
}
}
public Object instantiate(
String className, ObjectName loaderName,
Object[] params, String[] signature)
throws ReflectionException, MBeanException, InstanceNotFoundException {
if (params == null)
params = new Object[0];
if (signature == null)
signature = new String[0];
ClassLoader loader;
if (loaderName == null)
loader = this.getClass().getClassLoader();
else if (loaderName.equals(clrName))
loader = clr;
else
loader = (ClassLoader) getMBean(loaderName);
Class<?> c;
try {
c = Class.forName(className, false, loader);
} catch (ClassNotFoundException e) {
throw new ReflectionException(e);
}
Constructor[] constrs = c.getConstructors();
Constructor found = null;
findconstr:
for (Constructor constr : constrs) {
Class<?>[] cTypes = constr.getParameterTypes();
if (cTypes.length == signature.length) {
for (int i = 0; i < cTypes.length; i++) {
if (!cTypes[i].getName().equals(signature[i]))
continue findconstr;
}
found = constr;
break findconstr;
}
}
if (found == null) {
Exception x = new NoSuchMethodException(
className + Arrays.toString(signature));
throw new ReflectionException(x);
}
return invokeSomething(found, null, params);
}
@Deprecated
public ObjectInputStream deserialize(ObjectName name, byte[] data)
throws InstanceNotFoundException, OperationsException {
throw new UnsupportedOperationException();
}
@Deprecated
public ObjectInputStream deserialize(String className, byte[] data)
throws OperationsException, ReflectionException {
throw new UnsupportedOperationException();
}
@Deprecated
public ObjectInputStream deserialize(
String className, ObjectName loaderName, byte[] data)
throws InstanceNotFoundException, OperationsException, ReflectionException {
throw new UnsupportedOperationException();
}
public ClassLoader getClassLoaderFor(ObjectName mbeanName)
throws InstanceNotFoundException {
DynamicMBean mbean = getMBean(mbeanName);
Object userMBean = getUserMBean(mbean);
return userMBean.getClass().getClassLoader();
}
public ClassLoader getClassLoader(ObjectName loaderName)
throws InstanceNotFoundException {
return (ClassLoader) getMBean(loaderName);
}
public ClassLoaderRepository getClassLoaderRepository() {
return new ClassLoaderRepository() {
public Class<?> loadClass(String className)
throws ClassNotFoundException {
return clr.loadClass(className);
}
public Class<?> loadClassWithout(
ClassLoader exclude, String className)
throws ClassNotFoundException {
return clr.loadClassWithout(exclude, className);
}
public Class<?> loadClassBefore(
ClassLoader stop, String className)
throws ClassNotFoundException {
return clr.loadClassBefore(stop, className);
}
};
}
private static class ClassLoaderRepositoryImpl
extends ClassLoader implements ClassLoaderRepository {
private List<ClassLoader> loaders = newList();
{
loaders.add(this.getClass().getClassLoader());
// We also behave as if the system class loader were in
// the repository, since we do nothing to stop delegation
// to the parent, which is the system class loader, and
// that delegation happens before our findClass is called.
}
void addLoader(ClassLoader loader) {
loaders.add(loader);
}
void removeLoader(ClassLoader loader) {
if (!loaders.remove(loader))
throw new RuntimeException("Loader was not in CLR!");
}
public Class<?> loadClassWithout(
ClassLoader exclude, String className)
throws ClassNotFoundException {
return loadClassWithoutBefore(exclude, null, className);
}
public Class<?> loadClassBefore(ClassLoader stop, String className)
throws ClassNotFoundException {
return loadClassWithoutBefore(null, stop, className);
}
private Class<?> loadClassWithoutBefore(
ClassLoader exclude, ClassLoader stop, String className)
throws ClassNotFoundException {
for (ClassLoader loader : loaders) {
if (loader == exclude)
continue;
if (loader == stop)
break;
try {
return Class.forName(className, false, loader);
} catch (ClassNotFoundException e) {
// OK: try others
}
}
throw new ClassNotFoundException(className);
}
@Override
protected Class<?> findClass(String className)
throws ClassNotFoundException {
return loadClassWithout(null, className);
}
}
/* There is zero or one ListenerTable per MBean.
* The ListenerTable stuff is complicated. We want to rewrite the
* source of notifications so that if the source of a notification
* from the MBean X is a reference to X itself, it gets replaced
* by X's ObjectName. To do this, we wrap the user's listener in
* a RewriteListener. But if the same listener is added a second
* time (perhaps with a different filter or handback) we must
* reuse the same RewriteListener so that the two-argument
* removeNotificationListener(ObjectName,NotificationListener) will
* correctly remove both listeners. This means we must remember the
* mapping from listener to WrappedListener. But if the MBean
* discards its listeners (as a result of removeNL or spontaneously)
* then we don't want to keep a reference to the WrappedListener.
* So we have tons of WeakReferences. The key in the ListenerTable
* is an IdentityListener, which wraps the user's listener to ensure
* that identity and not equality is used during the lookup, even if
* the user's listener has an equals method. The value in the
* ListenerTable is a WeakReference wrapping a RewriteListener wrapping
* the same IdentityListener. Since the RewriteListener is what is
* added to the user's MBean, the WeakReference won't disappear as long
* as the MBean still has this listener. And since it references the
* IdentityListener, that won't disappear either. But once the
* RewriteListener is no longer referenced by the user's MBean,
* there's nothing to stop its WeakReference from being cleared,
* and then corresponding IdentityListener that is now only weakly
* referenced from the key in the table.
*/
private static class ListenerTable
extends WeakHashMap<NotificationListener,
WeakReference<NotificationListener>> {
}
private static class IdentityListener implements NotificationListener {
private final NotificationListener userListener;
IdentityListener(NotificationListener userListener) {
this.userListener = userListener;
}
public void handleNotification(
Notification notification, Object handback) {
userListener.handleNotification(notification, handback);
}
@Override
public boolean equals(Object o) {
return (this == o);
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
}
private static class RewriteListener implements NotificationListener {
private final ObjectName name;
private final Object userMBean;
private final NotificationListener userListener;
RewriteListener(
ObjectName name, Object userMBean,
NotificationListener userListener) {
this.name = name;
this.userMBean = userMBean;
this.userListener = userListener;
}
public void handleNotification(
Notification notification, Object handback) {
if (notification.getSource() == userMBean)
notification.setSource(name);
userListener.handleNotification(notification, handback);
}
}
private NotificationListener wrappedListener(
ObjectName name, Object userMBean, NotificationListener userListener)
throws InstanceNotFoundException {
ListenerTable table = new ListenerTable();
ListenerTable oldTable = listenerMap.putIfAbsent(name, table);
if (oldTable != null)
table = oldTable;
NotificationListener identityListener =
new IdentityListener(userListener);
synchronized (table) {
NotificationListener rewriteListener = null;
WeakReference<NotificationListener> wr =
table.get(identityListener);
if (wr != null)
rewriteListener = wr.get();
if (rewriteListener == null) {
rewriteListener = new RewriteListener(
name, userMBean, identityListener);
wr = new WeakReference<NotificationListener>(rewriteListener);
table.put(identityListener, wr);
}
return rewriteListener;
}
}
private DynamicMBean getMBean(ObjectName name)
throws InstanceNotFoundException {
DynamicMBean mbean = mbeans.get(name);
if (mbean == null)
throw new InstanceNotFoundException(name.toString());
return mbean;
}
private static interface WrapDynamicMBean extends DynamicMBean {
public Object getWrappedMBean();
}
private static class StandardWrapper
implements WrapDynamicMBean, MBeanRegistration {
private final Map<String, AttrMethods> attrMap = newMap();
private final Map<String, List
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