/**
   * 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;
  }
示例#2
0
 static {
   // FIXME: RMIServerImpl_Stub is generated at build time
   // after jconsole is built.  We need to investigate if
   // the Makefile can be fixed to build jconsole in the
   // right order.  As a workaround for now, we dynamically
   // load RMIServerImpl_Stub class instead of statically
   // referencing it.
   Class<? extends Remote> serverStubClass = null;
   try {
     serverStubClass = Class.forName(rmiServerImplStubClassName).asSubclass(Remote.class);
   } catch (ClassNotFoundException e) {
     // should never reach here
     throw (InternalError) new InternalError(e.getMessage()).initCause(e);
   }
   rmiServerImplStubClass = serverStubClass;
 }