/**
* 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;
}
/* Find MBean descriptions.
* MBean descriptions are searched for in ResourceBundles. Bundles
* are looked for in a mbean.property files within each package of
* the MBean class inheritance hierachy.
* Once a bundle is found, the key is added to object names in the
* following order: fully qualied managed resource class name, tail
* managed resource class name, tail mbean class name. The string
* "MBean" is stripped from the tail of any name.
* <P>For example, if the class a.b.C is managed by a MBean
* p.q.RMBean which is derived from p.SMBean, then the seach order
* for a key x is as follows:<PRE>
* bundle: p.q.mbean name: a.b.C.x
* bundle: p.q.mbean name: C.x
* bundle: p.q.mbean name: R.x
* bundle: p.mbean name: a.b.C.x
* bundle: p.mbean name: C.x
* bundle: p.mbean name: S.x
* </PRE>
* <P>The convention used for keys passed to this method are:<PRE>
* null or empty - Object description
* xxx - Attribute xxx description
* xxx() - Simple operation xxx description
* xxx(type,..) - Operation xxx with signature desciption
* xxx(type,..)[n] - Param n of operation xxx description
* </PRE>
* @param key
* @return Description string.
*/
private String findDescription(String key) {
Class lookIn = this.getClass();
// Array of possible objectNames
String[] objectNames = new String[3];
objectNames[0] = _object.getClass().getName();
if (objectNames[0].indexOf(".") >= 0)
objectNames[1] = objectNames[0].substring(objectNames[0].lastIndexOf(".") + 1);
while (lookIn != null) {
String pkg = lookIn.getName();
int lastDot = pkg.lastIndexOf(".");
if (lastDot > 0) {
objectNames[2] = pkg.substring(lastDot + 1);
pkg = pkg.substring(0, lastDot);
} else {
objectNames[2] = pkg;
pkg = null;
}
String resource = (pkg == null ? "mbean" : (pkg.replace('.', '/') + "/mbean"));
if (log.isTraceEnabled()) log.trace("Look for: " + resource);
try {
ResourceBundle bundle =
ResourceBundle.getBundle(
resource, Locale.getDefault(), _object.getClass().getClassLoader());
if (log.isTraceEnabled()) log.trace("Bundle " + resource);
for (int i = 0; i < objectNames.length; i++) {
String name = objectNames[i];
if (name == null) continue;
if (name.endsWith("MBean")) name = name.substring(0, name.length() - 5);
if (key != null && key.length() > 0) name += "." + key;
try {
String description = bundle.getString(name);
if (description != null && description.length() > 0) return description;
} catch (Exception e) {
if (log.isTraceEnabled()) log.trace(e.toString());
}
}
} catch (Exception e) {
if (log.isTraceEnabled()) log.trace(e.toString());
}
lookIn = lookIn.getSuperclass();
}
if (key == null || key.length() == 0) return objectNames[0];
return key;
}