Examples of javax.management.MBeanServer.instantiate()

javax.management.MBeanServer.instantiate()
Instantiates an object using the default loader repository and default no-args constructor. @see javax.management.loading.DefaultLoaderRepository @param className Class to instantiate. Must have a public no-argsconstructor. Cannot contain a null reference. @return instantiated object @throws ReflectionException If there was an error while trying to invokethe class's constructor or the given class was not found. This exception wraps the actual exception thrown. @throws MBeanException If the object constructor threw a checked exceptionduring the initialization. This exception wraps the actual exception thrown. @throws RuntimeMBeanException If the class constructor threw a runtimeexception. This exception wraps the actual exception thrown. @throws RuntimeErrorException If the class constructor threw an error.This exception wraps the actual error thrown. @throws RuntimeOperationsException If the className is null.Wraps an IllegalArgumentException instance.

      ClassLoader parent = getClass().getClassLoader().getParent();
      ClassLoaderSupport loader = new ClassLoaderSupport(new URL[]{file.toURL()}, parent);
      ObjectName loaderName = new ObjectName(":type=ClassLoader");
      server.registerMBean(loader, loaderName);


      Object mbean2 = server.instantiate(className, loaderName, new Object[0], new String[0]);


      // Now mbean1 should be of a different class from mbean2
      if (mbean1.getClass().equals(mbean2.getClass())) fail("MBean classes should be different");


      Object mbean3 = server.instantiate(className, new Object[0], new String[0]);

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      Object mbean2 = server.instantiate(className, loaderName, new Object[0], new String[0]);


      // Now mbean1 should be of a different class from mbean2
      if (mbean1.getClass().equals(mbean2.getClass())) fail("MBean classes should be different");


      Object mbean3 = server.instantiate(className, new Object[0], new String[0]);


      // Since JMX 1.2, the CLR has the cl of the MBeanServer in its classpath.
      if (!mbean1.getClass().equals(mbean3.getClass())) fail("MBean classes should be equal");


      server.unregisterMBean(loaderName);

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      // Since JMX 1.2, the CLR has the cl of the MBeanServer in its classpath.
      if (!mbean1.getClass().equals(mbean3.getClass())) fail("MBean classes should be equal");


      server.unregisterMBean(loaderName);


      Object mbean4 = server.instantiate(className, new Object[0], new String[0]);
      if (!mbean1.getClass().equals(mbean4.getClass())) fail("MBean classes should be equal");
   }


   public void testWrapExceptionsThrownByMBeanMethods() throws Exception
   {

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      String className = "java.lang.String";


      try
      {
         server.instantiate(className, null);
         fail();
      }
      catch (SecurityException ignored)
      {
      }

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      catch (SecurityException ignored)
      {
      }


      addPermission(new MBeanPermission(className, "instantiate"));
      server.instantiate(className, null);


      // Check also the overloaded version, we need an MLet
      String mletClassName = "javax.management.loading.MLet";
      ObjectName name = new ObjectName(server.getDefaultDomain(), "mbean", "mlet");
      resetPermissions();

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      addPermission(new RuntimePermission("createClassLoader"));
      server.createMBean(mletClassName, name, null);


      try
      {
         server.instantiate(className, null);
         fail();
      }
      catch (SecurityException ignored)
      {
      }

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      catch (SecurityException ignored)
      {
      }


      addPermission(new MBeanPermission(className, "instantiate"));
      server.instantiate(className, null);
   }


   public void testInvoke() throws Exception
   {
      addPermission(new MBeanServerPermission("newMBeanServer"));

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                if (mbs == null) {
                    LOG.log(Level.WARNING, "MBeanServer not available.");
                } else {
                    try {
                        RequiredModelMBean rtMBean = 
                            (RequiredModelMBean)mbs.instantiate("javax.management.modelmbean.RequiredModelMBean");
                        rtMBean.setModelMBeanInfo(mbi);
                        try {
                            rtMBean.setManagedResource(managedEndpoint, "ObjectReference");
                        } catch (InvalidTargetObjectTypeException itotex) {
                            throw new JMException(itotex.getMessage());

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