/**
* Create MBean for Object. Attempts to create an MBean for the object by searching the package
* and class name space. For example an object of the type
*
* <PRE>
* class com.acme.MyClass extends com.acme.util.BaseClass
* </PRE>
*
* Then this method would look for the following classes:
*
* <UL>
* <LI>com.acme.MyClassMBean
* <LI>com.acme.jmx.MyClassMBean
* <LI>com.acme.util.BaseClassMBean
* <LI>com.acme.util.jmx.BaseClassMBean
* </UL>
*
* @param o The object
* @return A new instance of an MBean for the object or null.
*/
public static ModelMBean mbeanFor(Object o) {
try {
Class oClass = o.getClass();
ClassLoader loader = oClass.getClassLoader();
ModelMBean mbean = null;
boolean jmx = false;
Class[] interfaces = null;
int i = 0;
while (mbean == null && oClass != null) {
Class focus = interfaces == null ? oClass : interfaces[i];
String pName = focus.getPackage().getName();
String cName = focus.getName().substring(pName.length() + 1);
String mName = pName + (jmx ? ".jmx." : ".") + cName + "MBean";
try {
Class mClass = loader.loadClass(mName);
if (log.isTraceEnabled()) log.trace("mbeanFor " + o + " mClass=" + mClass);
mbean = (ModelMBean) mClass.newInstance();
mbean.setManagedResource(o, "objectReference");
if (log.isDebugEnabled()) log.debug("mbeanFor " + o + " is " + mbean);
return mbean;
} catch (ClassNotFoundException e) {
if (e.toString().endsWith("MBean")) {
if (log.isTraceEnabled()) log.trace(e.toString());
} else log.warn(LogSupport.EXCEPTION, e);
} catch (Error e) {
log.warn(LogSupport.EXCEPTION, e);
mbean = null;
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
mbean = null;
}
if (jmx) {
if (interfaces != null) {
i++;
if (i >= interfaces.length) {
interfaces = null;
oClass = oClass.getSuperclass();
}
} else {
interfaces = oClass.getInterfaces();
i = 0;
if (interfaces == null || interfaces.length == 0) {
interfaces = null;
oClass = oClass.getSuperclass();
}
}
}
jmx = !jmx;
}
} catch (Exception e) {
LogSupport.ignore(log, e);
}
return null;
}
/**
* Create MBean for Object. Attempts to create an MBean for the object by searching the package
* and class name space. For example an object of the type
*
* <PRE>
* class com.acme.MyClass extends com.acme.util.BaseClass implements com.acme.Iface
* </PRE>
*
* Then this method would look for the following classes:
*
* <UL>
* <LI>com.acme.jmx.MyClassMBean
* <LI>com.acme.util.jmx.BaseClassMBean
* <LI>org.eclipse.jetty.jmx.ObjectMBean
* </UL>
*
* @param o The object
* @return A new instance of an MBean for the object or null.
*/
public static Object mbeanFor(Object o) {
try {
Class oClass = o.getClass();
Object mbean = null;
while (mbean == null && oClass != null) {
String pName = oClass.getPackage().getName();
String cName = oClass.getName().substring(pName.length() + 1);
String mName = pName + ".jmx." + cName + "MBean";
try {
Class mClass =
(Object.class.equals(oClass))
? oClass = ObjectMBean.class
: Loader.loadClass(oClass, mName, true);
if (LOG.isDebugEnabled()) LOG.debug("mbeanFor " + o + " mClass=" + mClass);
try {
Constructor constructor = mClass.getConstructor(OBJ_ARG);
mbean = constructor.newInstance(new Object[] {o});
} catch (Exception e) {
LOG.ignore(e);
if (ModelMBean.class.isAssignableFrom(mClass)) {
mbean = mClass.newInstance();
((ModelMBean) mbean).setManagedResource(o, "objectReference");
}
}
if (LOG.isDebugEnabled()) LOG.debug("mbeanFor " + o + " is " + mbean);
return mbean;
} catch (ClassNotFoundException e) {
// The code below was modified to fix bugs 332200 and JETTY-1416
// The issue was caused by additional information added to the
// message after the class name when running in Apache Felix,
// as well as before the class name when running in JBoss.
if (e.getMessage().contains(mName)) LOG.ignore(e);
else LOG.warn(e);
} catch (Error e) {
LOG.warn(e);
mbean = null;
} catch (Exception e) {
LOG.warn(e);
mbean = null;
}
oClass = oClass.getSuperclass();
}
} catch (Exception e) {
LOG.ignore(e);
}
return null;
}
public static void main(String[] args) throws Exception {
boolean ok = true;
MBeanServer mbs = MBeanServerFactory.createMBeanServer();
// ModelMBeanAttributeInfo
Descriptor somethingAttributeDescriptor =
new DescriptorSupport(
new String[] {"name=Something", "descriptorType=attribute", "getMethod=getSomething"});
ModelMBeanAttributeInfo somethingAttributeInfo =
new ModelMBeanAttributeInfo(
"Something",
"java.lang.String",
"Something attribute",
true,
true,
false,
somethingAttributeDescriptor);
Descriptor somethingCachedAttributeDescriptor =
new DescriptorSupport(
new String[] {
"name=SomethingCached",
"descriptorType=attribute",
"getMethod=getSomethingCached",
"currencyTimeLimit=5000"
});
ModelMBeanAttributeInfo somethingCachedAttributeInfo =
new ModelMBeanAttributeInfo(
"SomethingCached",
"java.lang.String",
"Something cached attribute",
true,
true,
false,
somethingCachedAttributeDescriptor);
// ModelMBeanInfo
ModelMBeanInfo mmbi =
new ModelMBeanInfoSupport(
Resource.class.getName(),
"Resource MBean",
new ModelMBeanAttributeInfo[] {somethingAttributeInfo, somethingCachedAttributeInfo},
null,
new ModelMBeanOperationInfo[] {},
null);
// RequiredModelMBean
ModelMBean mmb = new RequiredModelMBean(mmbi);
mmb.setManagedResource(resource, "ObjectReference");
ObjectName mmbName = new ObjectName(":type=ResourceMBean");
mbs.registerMBean(mmb, mmbName);
// Run tests
System.out.println("\nTest that we receive ServiceNotFoundException");
try {
Attribute attr = new Attribute("Something", "Some string");
mbs.setAttribute(mmbName, attr);
System.out.println("TEST FAILED: Didn't caught exception");
ok = false;
} catch (MBeanException mbex) {
Exception e = mbex.getTargetException();
if (e == null || !(e instanceof ServiceNotFoundException)) {
System.out.println("TEST FAILED: Caught wrong exception:" + e);
ok = false;
} else System.out.println("Received expected ServiceNotFoundException");
} catch (Exception e) {
System.out.println("TEST FAILED: Caught wrong exception: " + e);
e.printStackTrace(System.out);
ok = false;
}
// Now check that when caching is enabled, setAttribute is working
System.out.println("\nTest that we are not receiving ServiceNotFoundException");
try {
Attribute attr = new Attribute("SomethingCached", "Some string");
mbs.setAttribute(mmbName, attr);
System.out.println("No exception thrown");
} catch (Exception e) {
System.out.println("TEST FAILED: Caught an exception: " + e);
e.printStackTrace(System.out);
ok = false;
}
if (ok) System.out.println("Test passed");
else {
System.out.println("TEST FAILED");
throw new Exception("TEST FAILED");
}
}
