/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.broker.jmx;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.Principal;
import java.util.HashMap;
import java.util.Map;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanOperationInfo;
import javax.management.MBeanParameterInfo;
import javax.management.NotCompliantMBeanException;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.management.StandardMBean;
import javax.security.auth.Subject;
import org.apache.activemq.broker.util.AuditLogEntry;
import org.apache.activemq.broker.util.AuditLogService;
import org.apache.activemq.broker.util.JMXAuditLogEntry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* MBean that looks for method/parameter descriptions in the Info annotation.
*/
public class AnnotatedMBean extends StandardMBean {
private static final Map<String, Class<?>> primitives = new HashMap<String, Class<?>>();
private static final Logger LOG = LoggerFactory.getLogger("org.apache.activemq.audit");
private static boolean audit;
private static AuditLogService auditLog;
static {
Class<?>[] p = { byte.class, short.class, int.class, long.class, float.class, double.class, char.class, boolean.class, };
for (Class<?> c : p) {
primitives.put(c.getName(), c);
}
audit = "true".equalsIgnoreCase(System.getProperty("org.apache.activemq.audit"));
if (audit) {
auditLog = AuditLogService.getAuditLog();
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public static void registerMBean(ManagementContext context, Object object, ObjectName objectName) throws Exception {
String mbeanName = object.getClass().getName() + "MBean";
for (Class c : object.getClass().getInterfaces()) {
if (mbeanName.equals(c.getName())) {
context.registerMBean(new AnnotatedMBean(object, c), objectName);
return;
}
}
context.registerMBean(object, objectName);
}
/** Instance where the MBean interface is implemented by another object. */
public <T> AnnotatedMBean(T impl, Class<T> mbeanInterface) throws NotCompliantMBeanException {
super(impl, mbeanInterface);
}
/** Instance where the MBean interface is implemented by this object. */
protected AnnotatedMBean(Class<?> mbeanInterface) throws NotCompliantMBeanException {
super(mbeanInterface);
}
/** {@inheritDoc} */
@Override
protected String getDescription(MBeanAttributeInfo info) {
String descr = info.getDescription();
Method m = getMethod(getMBeanInterface(), "get" + info.getName().substring(0, 1).toUpperCase() + info.getName().substring(1));
if (m == null)
m = getMethod(getMBeanInterface(), "is" + info.getName().substring(0, 1).toUpperCase() + info.getName().substring(1));
if (m == null)
m = getMethod(getMBeanInterface(), "does" + info.getName().substring(0, 1).toUpperCase() + info.getName().substring(1));
if (m != null) {
MBeanInfo d = m.getAnnotation(MBeanInfo.class);
if (d != null)
descr = d.value();
}
return descr;
}
/** {@inheritDoc} */
@Override
protected String getDescription(MBeanOperationInfo op) {
String descr = op.getDescription();
Method m = getMethod(op);
if (m != null) {
MBeanInfo d = m.getAnnotation(MBeanInfo.class);
if (d != null)
descr = d.value();
}
return descr;
}
/** {@inheritDoc} */
@Override
protected String getParameterName(MBeanOperationInfo op, MBeanParameterInfo param, int paramNo) {
String name = param.getName();
Method m = getMethod(op);
if (m != null) {
for (Annotation a : m.getParameterAnnotations()[paramNo]) {
if (MBeanInfo.class.isInstance(a))
name = MBeanInfo.class.cast(a).value();
}
}
return name;
}
/**
* Extracts the Method from the MBeanOperationInfo
*
* @param op
*
* @return a Method
*/
private Method getMethod(MBeanOperationInfo op) {
final MBeanParameterInfo[] params = op.getSignature();
final String[] paramTypes = new String[params.length];
for (int i = 0; i < params.length; i++)
paramTypes[i] = params[i].getType();
return getMethod(getMBeanInterface(), op.getName(), paramTypes);
}
/**
* Returns the Method with the specified name and parameter types for the
* given class, null if it doesn't exist.
*
* @param mbean
* @param method
* @param params
*
* @return a Method
*/
private static Method getMethod(Class<?> mbean, String method, String... params) {
try {
final ClassLoader loader = mbean.getClassLoader();
final Class<?>[] paramClasses = new Class<?>[params.length];
for (int i = 0; i < params.length; i++) {
paramClasses[i] = primitives.get(params[i]);
if (paramClasses[i] == null)
paramClasses[i] = Class.forName(params[i], false, loader);
}
return mbean.getMethod(method, paramClasses);
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
return null;
}
}
@Override
public Object invoke(String s, Object[] objects, String[] strings) throws MBeanException, ReflectionException {
if (audit) {
Subject subject = Subject.getSubject(AccessController.getContext());
String caller = "anonymous";
if (subject != null) {
caller = "";
for (Principal principal : subject.getPrincipals()) {
caller += principal.getName() + " ";
}
}
AuditLogEntry entry = new JMXAuditLogEntry();
entry.setUser(caller);
entry.setTimestamp(System.currentTimeMillis());
entry.setOperation(this.getMBeanInfo().getClassName() + "." + s);
try
{
if (objects.length == strings.length)
{
Method m = getMBeanMethod(this.getImplementationClass(), s, strings);
entry.getParameters().put("arguments", AuditLogEntry.sanitizeArguments(objects, m));
}
else
{
// Supplied Method Signature and Arguments do not match. Set all supplied Arguments in Log Entry. To diagnose user error.
entry.getParameters().put("arguments", objects);
}
}
catch (ReflectiveOperationException e)
{
// Method or Class not found, set all supplied arguments. Set all supplied Arguments in Log Entry. To diagnose user error.
entry.getParameters().put("arguments", objects);
}
auditLog.log(entry);
}
return super.invoke(s, objects, strings);
}
private Method getMBeanMethod(Class clazz, String methodName, String[] signature) throws ReflectiveOperationException {
Class[] parameterTypes = new Class[signature.length];
for (int i = 0; i < signature.length; i++) {
parameterTypes[i] = Class.forName(signature[i]);
}
return clazz.getMethod(methodName, parameterTypes);
}
}