Examples with ModelMBeanOperationInfo javax.management.modelmbean.ModelMBeanOperationInfo used on opensource projects

Example 6 with ModelMBeanOperationInfo

use of javax.management.modelmbean.ModelMBeanOperationInfo in project jdk8u_jdk by JetBrains.

the class RequiredModelMBeanGetAttributeTest method main.

public static void main(String[] args) throws Exception {
    boolean ok = true;
    MBeanServer mbs = MBeanServerFactory.createMBeanServer();
    // Resource methods
    Method nullGetter = Resource.class.getMethod("getNull", (Class[]) null);
    Method integerGetter = Resource.class.getMethod("getInteger", (Class[]) null);
    Method hashtableGetter = Resource.class.getMethod("getHashtable", (Class[]) null);
    Method mapGetter = Resource.class.getMethod("getMap", (Class[]) null);
    // ModelMBeanOperationInfo
    Descriptor nullOperationDescriptor = new DescriptorSupport(new String[] { "name=getNull", "descriptorType=operation", "role=getter" });
    ModelMBeanOperationInfo nullOperationInfo = new ModelMBeanOperationInfo("Null attribute", nullGetter, nullOperationDescriptor);
    Descriptor integerOperationDescriptor = new DescriptorSupport(new String[] { "name=getInteger", "descriptorType=operation", "role=getter" });
    ModelMBeanOperationInfo integerOperationInfo = new ModelMBeanOperationInfo("Integer attribute", integerGetter, integerOperationDescriptor);
    Descriptor hashtableOperationDescriptor = new DescriptorSupport(new String[] { "name=getHashtable", "descriptorType=operation", "role=getter" });
    ModelMBeanOperationInfo hashtableOperationInfo = new ModelMBeanOperationInfo("Hashtable attribute", hashtableGetter, hashtableOperationDescriptor);
    Descriptor mapOperationDescriptor = new DescriptorSupport(new String[] { "name=getMap", "descriptorType=operation", "role=getter" });
    ModelMBeanOperationInfo mapOperationInfo = new ModelMBeanOperationInfo("Map attribute", mapGetter, mapOperationDescriptor);
    // ModelMBeanAttributeInfo
    Descriptor nullAttributeDescriptor = new DescriptorSupport(new String[] { "name=Null", "descriptorType=attribute", "getMethod=getNull" });
    ModelMBeanAttributeInfo nullAttributeInfo = new ModelMBeanAttributeInfo("Null", "java.lang.Object", "Null attribute", true, false, false, nullAttributeDescriptor);
    Descriptor integerAttributeDescriptor = new DescriptorSupport(new String[] { "name=Integer", "descriptorType=attribute", "getMethod=getInteger" });
    ModelMBeanAttributeInfo integerAttributeInfo = new ModelMBeanAttributeInfo("Integer", "int", "Integer attribute", true, false, false, integerAttributeDescriptor);
    Descriptor hashtableAttributeDescriptor = new DescriptorSupport(new String[] { "name=Hashtable", "descriptorType=attribute", "getMethod=getHashtable" });
    ModelMBeanAttributeInfo hashtableAttributeInfo = new ModelMBeanAttributeInfo("Hashtable", "java.util.Hashtable", "Hashtable attribute", true, false, false, hashtableAttributeDescriptor);
    Descriptor mapAttributeDescriptor = new DescriptorSupport(new String[] { "name=Map", "descriptorType=attribute", "getMethod=getMap" });
    ModelMBeanAttributeInfo mapAttributeInfo = new ModelMBeanAttributeInfo("Map", "java.util.Map", "Map attribute", true, false, false, mapAttributeDescriptor);
    Descriptor null2AttributeDescriptor = new DescriptorSupport(new String[] { "name=Null2", "descriptorType=attribute" });
    null2AttributeDescriptor.setField("default", null);
    ModelMBeanAttributeInfo null2AttributeInfo = new ModelMBeanAttributeInfo("Null2", "java.lang.Object", "Null2 attribute", true, false, false, null2AttributeDescriptor);
    Descriptor integer2AttributeDescriptor = new DescriptorSupport(new String[] { "name=Integer2", "descriptorType=attribute" });
    integer2AttributeDescriptor.setField("default", 10);
    ModelMBeanAttributeInfo integer2AttributeInfo = new ModelMBeanAttributeInfo("Integer2", "int", "Integer2 attribute", true, false, false, integer2AttributeDescriptor);
    Descriptor hashtable2AttributeDescriptor = new DescriptorSupport(new String[] { "name=Hashtable2", "descriptorType=attribute" });
    hashtable2AttributeDescriptor.setField("default", new Hashtable());
    ModelMBeanAttributeInfo hashtable2AttributeInfo = new ModelMBeanAttributeInfo("Hashtable2", "java.util.Hashtable", "Hashtable2 attribute", true, false, false, hashtable2AttributeDescriptor);
    Descriptor map2AttributeDescriptor = new DescriptorSupport(new String[] { "name=Map2", "descriptorType=attribute" });
    map2AttributeDescriptor.setField("default", new Hashtable());
    ModelMBeanAttributeInfo map2AttributeInfo = new ModelMBeanAttributeInfo("Map2", "java.util.Map", "Map2 attribute", true, false, false, map2AttributeDescriptor);
    // ModelMBeanInfo
    ModelMBeanInfo mmbi = new ModelMBeanInfoSupport(Resource.class.getName(), "Resource MBean", new ModelMBeanAttributeInfo[] { nullAttributeInfo, integerAttributeInfo, hashtableAttributeInfo, mapAttributeInfo, null2AttributeInfo, integer2AttributeInfo, hashtable2AttributeInfo, map2AttributeInfo }, null, new ModelMBeanOperationInfo[] { nullOperationInfo, integerOperationInfo, hashtableOperationInfo, mapOperationInfo }, 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("\nTesting that we can call getNull()... ");
    try {
        Object o = mbs.getAttribute(mmbName, "Null");
        System.out.println("getNull() = " + o);
        System.out.println("Attribute's declared type = java.lang.Object");
        System.out.println("Returned value's type = null");
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getInteger()... ");
    try {
        Integer i = (Integer) mbs.getAttribute(mmbName, "Integer");
        System.out.println("getInteger() = " + i);
        System.out.println("Attribute's declared type = int");
        System.out.println("Returned value's type = " + i.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getHashtable()... ");
    try {
        Hashtable h = (Hashtable) mbs.getAttribute(mmbName, "Hashtable");
        System.out.println("getHashtable() = " + h);
        System.out.println("Attribute's declared type = " + "java.util.Hashtable");
        System.out.println("Returned value's type = " + h.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getMap()... ");
    try {
        Map m = (Map) mbs.getAttribute(mmbName, "Map");
        System.out.println("getMap() = " + m);
        System.out.println("Attribute's declared type = " + "java.util.Map");
        System.out.println("Returned value's type = " + m.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getNull2()... ");
    try {
        Object o = mbs.getAttribute(mmbName, "Null2");
        System.out.println("getNull2() = " + o);
        System.out.println("Attribute's declared type = java.lang.Object");
        System.out.println("Returned value's type = null");
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getInteger2()... ");
    try {
        Integer i = (Integer) mbs.getAttribute(mmbName, "Integer2");
        System.out.println("getInteger2() = " + i);
        System.out.println("Attribute's declared type = int");
        System.out.println("Returned value's type = " + i.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getHashtable2()... ");
    try {
        Hashtable h = (Hashtable) mbs.getAttribute(mmbName, "Hashtable2");
        System.out.println("getHashtable2() = " + h);
        System.out.println("Attribute's declared type = " + "java.util.Hashtable");
        System.out.println("Returned value's type = " + h.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    System.out.println("\nTesting that we can call getMap2()... ");
    try {
        Map m = (Map) mbs.getAttribute(mmbName, "Map2");
        System.out.println("getMap2() = " + m);
        System.out.println("Attribute's declared type = " + "java.util.Map");
        System.out.println("Returned value's type = " + m.getClass().getName());
    } catch (Exception e) {
        System.out.println("TEST FAILED: Caught exception:");
        e.printStackTrace(System.out);
        ok = false;
    }
    if (ok)
        System.out.println("\nTest passed.\n");
    else {
        System.out.println("\nTest failed.\n");
        System.exit(1);
    }
}

Example 7 with ModelMBeanOperationInfo

use of javax.management.modelmbean.ModelMBeanOperationInfo in project jdk8u_jdk by JetBrains.

the class MBeanInfoInteropTest method init.

private static void init() throws Exception {
    mbai = new MBeanAttributeInfo("name", "type", "descr", true, false, false);
    mbpi = new MBeanParameterInfo("name", "type", "descr");
    MBeanParameterInfo[] params = new MBeanParameterInfo[] { mbpi };
    mbci1 = new MBeanConstructorInfo("name", "descr", null);
    mbci2 = new MBeanConstructorInfo("name", "descr", params);
    mbni1 = new MBeanNotificationInfo(null, "name", "descr");
    mbni2 = new MBeanNotificationInfo(new String[] { "type" }, "name", "descr");
    mboi1 = new MBeanOperationInfo("name", "descr", null, "type", ACTION);
    mboi2 = new MBeanOperationInfo("name", "descr", params, "type", INFO);
    mbi1 = new MBeanInfo("class", "descr", null, null, null, null);
    mbi2 = new MBeanInfo("class", "descr", new MBeanAttributeInfo[] { mbai }, new MBeanConstructorInfo[] { mbci1, mbci2 }, new MBeanOperationInfo[] { mboi1, mboi2 }, new MBeanNotificationInfo[] { mbni1, mbni2 });
    ombai1 = new OpenMBeanAttributeInfoSupport("name", "descr", INTEGER, true, false, false);
    ombai2 = new OpenMBeanAttributeInfoSupport("name", "descr", INTEGER, true, false, false, 5);
    ombai3 = new OpenMBeanAttributeInfoSupport("name", "descr", INTEGER, true, false, false, 5, 1, 6);
    ombai4 = new OpenMBeanAttributeInfoSupport("name", "descr", INTEGER, true, false, false, 5, new Integer[] { 2, 3, 5, 7 });
    ombpi1 = new OpenMBeanParameterInfoSupport("name1", "descr", INTEGER);
    ombpi2 = new OpenMBeanParameterInfoSupport("name2", "descr", INTEGER, 5);
    ombpi3 = new OpenMBeanParameterInfoSupport("name3", "descr", INTEGER, 5, 1, 6);
    ombpi4 = new OpenMBeanParameterInfoSupport("name4", "descr", INTEGER, 5, new Integer[] { 2, 3, 5, 7 });
    OpenMBeanParameterInfo[] oparams = { ombpi1, ombpi2, ombpi3, ombpi4 };
    ombci1 = new OpenMBeanConstructorInfoSupport("name", "descr", null);
    ombci2 = new OpenMBeanConstructorInfoSupport("name", "descr", oparams);
    omboi1 = new OpenMBeanOperationInfoSupport("name", "descr", null, INTEGER, ACTION);
    omboi2 = new OpenMBeanOperationInfoSupport("name", "descr", oparams, INTEGER, ACTION);
    ombi1 = new OpenMBeanInfoSupport("class", "descr", null, null, null, null);
    ombi2 = new OpenMBeanInfoSupport("class", "descr", new OpenMBeanAttributeInfo[] { ombai1, ombai2, ombai3, ombai4 }, new OpenMBeanConstructorInfo[] { ombci1, ombci2 }, new OpenMBeanOperationInfo[] { omboi1, omboi2 }, new MBeanNotificationInfo[] { mbni1, mbni2 });
    Descriptor attrd = new DescriptorSupport(new String[] { "name=name", "descriptorType=attribute" });
    mmbai1 = new ModelMBeanAttributeInfo("name", "type", "descr", true, false, false);
    mmbai2 = new ModelMBeanAttributeInfo("name", "type", "descr", true, false, false, attrd);
    Descriptor constrd = new DescriptorSupport(new String[] { "name=name", "descriptorType=operation", "role=constructor" });
    mmbci1 = new ModelMBeanConstructorInfo("name", "descr", null);
    mmbci2 = new ModelMBeanConstructorInfo("name", "descr", null, constrd);
    mmbci3 = new ModelMBeanConstructorInfo("name", "descr", params);
    mmbci4 = new ModelMBeanConstructorInfo("name", "descr", params, constrd);
    Descriptor operd = new DescriptorSupport(new String[] { "name=name", "descriptorType=operation" });
    mmboi1 = new ModelMBeanOperationInfo("name", "descr", null, "type", ACTION);
    mmboi2 = new ModelMBeanOperationInfo("name", "descr", null, "type", ACTION, operd);
    mmboi3 = new ModelMBeanOperationInfo("name", "descr", params, "type", ACTION);
    mmboi4 = new ModelMBeanOperationInfo("name", "descr", params, "type", ACTION, operd);
    Descriptor notifd = new DescriptorSupport(new String[] { "name=name", "descriptorType=notification" });
    mmbni1 = new ModelMBeanNotificationInfo(null, "name", "descr");
    mmbni2 = new ModelMBeanNotificationInfo(null, "name", "descr", notifd);
    mmbni3 = new ModelMBeanNotificationInfo(new String[] { "type" }, "name", "descr");
    mmbni4 = new ModelMBeanNotificationInfo(new String[] { "type" }, "name", "descr", notifd);
    Descriptor mbeand = new DescriptorSupport(new String[] { "name=name", "descriptorType=mbean" });
    mmbi1 = new ModelMBeanInfoSupport("class", "descr", null, null, null, null);
    mmbi2 = new ModelMBeanInfoSupport("class", "descr", null, null, null, null, mbeand);
    mmbi3 = new ModelMBeanInfoSupport("class", "descr", new ModelMBeanAttributeInfo[] { mmbai1, mmbai2 }, new ModelMBeanConstructorInfo[] { mmbci1, mmbci2, mmbci3, mmbci4 }, new ModelMBeanOperationInfo[] { mmboi1, mmboi2, mmboi3, mmboi4 }, new ModelMBeanNotificationInfo[] { mmbni1, mmbni2, mmbni3, mmbni4 });
    mmbi4 = new ModelMBeanInfoSupport("class", "descr", new ModelMBeanAttributeInfo[] { mmbai1, mmbai2 }, new ModelMBeanConstructorInfo[] { mmbci1, mmbci2, mmbci3, mmbci4 }, new ModelMBeanOperationInfo[] { mmboi1, mmboi2, mmboi3, mmboi4 }, new ModelMBeanNotificationInfo[] { mmbni1, mmbni2, mmbni3, mmbni4 }, mbeand);
    objects = new Serializable[] { mbai, mbpi, mbci1, mbci2, mbni1, mbni2, mboi1, mboi2, mbi1, mbi2, ombai1, ombai2, ombai3, ombai4, ombpi1, ombpi2, ombpi3, ombpi4, ombci1, ombci2, omboi1, omboi2, ombi1, ombi2, mmbai1, mmbai2, mmbci1, mmbci2, mmbci3, mmbci4, mmboi1, mmboi2, mmboi3, mmboi4, mmbni1, mmbni2, mmbni3, mmbni4 };
}

Example 8 with ModelMBeanOperationInfo

use of javax.management.modelmbean.ModelMBeanOperationInfo in project Activiti by Activiti.

the class MBeanInfoAssembler method extractMbeanAttributes.

private void extractMbeanAttributes(Object managedBean, Map<String, ManagedAttributeInfo> attributes, Set<ModelMBeanAttributeInfo> mBeanAttributes, Set<ModelMBeanOperationInfo> mBeanOperations) throws IntrospectionException {
    for (ManagedAttributeInfo info : attributes.values()) {
        ModelMBeanAttributeInfo mbeanAttribute = new ModelMBeanAttributeInfo(info.getKey(), info.getDescription(), info.getGetter(), info.getSetter());
        // add missing attribute descriptors, this is needed to have attributes accessible
        Descriptor desc = mbeanAttribute.getDescriptor();
        if (info.getGetter() != null) {
            desc.setField("getMethod", info.getGetter().getName());
            // attribute must also be added as mbean operation
            ModelMBeanOperationInfo mbeanOperation = new ModelMBeanOperationInfo(info.getKey(), info.getGetter());
            Descriptor opDesc = mbeanOperation.getDescriptor();
            mbeanOperation.setDescriptor(opDesc);
            mBeanOperations.add(mbeanOperation);
        }
        if (info.getSetter() != null) {
            desc.setField("setMethod", info.getSetter().getName());
            // attribute must also be added as mbean operation
            ModelMBeanOperationInfo mbeanOperation = new ModelMBeanOperationInfo(info.getKey(), info.getSetter());
            mBeanOperations.add(mbeanOperation);
        }
        mbeanAttribute.setDescriptor(desc);
        mBeanAttributes.add(mbeanAttribute);
        LOG.trace("Assembled attribute: {}", mbeanAttribute);
    }
}

Example 9 with ModelMBeanOperationInfo

use of javax.management.modelmbean.ModelMBeanOperationInfo in project Activiti by Activiti.

the class MBeanInfoAssembler method getMBeanInfo.

public ModelMBeanInfo getMBeanInfo(Object defaultManagedBean, Object customManagedBean, String objectName) throws JMException {
    if ((defaultManagedBean == null && customManagedBean == null) || objectName == null)
        return null;
    // skip proxy classes
    if (defaultManagedBean != null && Proxy.isProxyClass(defaultManagedBean.getClass())) {
        LOG.trace("Skip creating ModelMBeanInfo due proxy class {}", defaultManagedBean.getClass());
        return null;
    }
    // maps and lists to contain information about attributes and operations
    Map<String, ManagedAttributeInfo> attributes = new LinkedHashMap<String, ManagedAttributeInfo>();
    Set<ManagedOperationInfo> operations = new LinkedHashSet<ManagedOperationInfo>();
    Set<ModelMBeanAttributeInfo> mBeanAttributes = new LinkedHashSet<ModelMBeanAttributeInfo>();
    Set<ModelMBeanOperationInfo> mBeanOperations = new LinkedHashSet<ModelMBeanOperationInfo>();
    Set<ModelMBeanNotificationInfo> mBeanNotifications = new LinkedHashSet<ModelMBeanNotificationInfo>();
    // extract details from default managed bean
    if (defaultManagedBean != null) {
        extractAttributesAndOperations(defaultManagedBean.getClass(), attributes, operations);
        extractMbeanAttributes(defaultManagedBean, attributes, mBeanAttributes, mBeanOperations);
        extractMbeanOperations(defaultManagedBean, operations, mBeanOperations);
        extractMbeanNotifications(defaultManagedBean, mBeanNotifications);
    }
    // extract details from custom managed bean
    if (customManagedBean != null) {
        extractAttributesAndOperations(customManagedBean.getClass(), attributes, operations);
        extractMbeanAttributes(customManagedBean, attributes, mBeanAttributes, mBeanOperations);
        extractMbeanOperations(customManagedBean, operations, mBeanOperations);
        extractMbeanNotifications(customManagedBean, mBeanNotifications);
    }
    // create the ModelMBeanInfo
    String name = getName(customManagedBean != null ? customManagedBean : defaultManagedBean, objectName);
    String description = getDescription(customManagedBean != null ? customManagedBean : defaultManagedBean, objectName);
    ModelMBeanAttributeInfo[] arrayAttributes = mBeanAttributes.toArray(new ModelMBeanAttributeInfo[mBeanAttributes.size()]);
    ModelMBeanOperationInfo[] arrayOperations = mBeanOperations.toArray(new ModelMBeanOperationInfo[mBeanOperations.size()]);
    ModelMBeanNotificationInfo[] arrayNotifications = mBeanNotifications.toArray(new ModelMBeanNotificationInfo[mBeanNotifications.size()]);
    ModelMBeanInfo info = new ModelMBeanInfoSupport(name, description, arrayAttributes, null, arrayOperations, arrayNotifications);
    LOG.trace("Created ModelMBeanInfo {}", info);
    return info;
}

Example 10 with ModelMBeanOperationInfo

use of javax.management.modelmbean.ModelMBeanOperationInfo in project geode by apache.

the class MX4JModelMBean method invoke.

public Object invoke(String method, Object[] arguments, String[] params) throws MBeanException, ReflectionException {
    if (method == null)
        throw new RuntimeOperationsException(new IllegalArgumentException(LocalizedStrings.MX4JModelMBean_METHOD_NAME_CANNOT_BE_NULL.toLocalizedString()));
    if (arguments == null)
        arguments = new Object[0];
    if (params == null)
        params = new String[0];
    Logger logger = getLogger();
    // Find operation descriptor
    ModelMBeanInfo info = getModelMBeanInfo();
    if (info == null)
        throw new MBeanException(new ServiceNotFoundException(LocalizedStrings.MX4JModelMBean_MODELMBEANINFO_IS_NULL.toLocalizedString()));
    if (logger.isEnabledFor(Logger.DEBUG))
        logger.debug("ModelMBeanInfo is: " + info);
    // This is a clone, we use it read only
    ModelMBeanOperationInfo operInfo = info.getOperation(method);
    if (operInfo == null)
        throw new MBeanException(new ServiceNotFoundException(LocalizedStrings.MX4JModelMBean_CANNOT_FIND_MODELMBEANOPERATIONINFO_FOR_OPERATION_0.toLocalizedString(method)));
    if (logger.isEnabledFor(Logger.DEBUG))
        logger.debug("Operation info is: " + operInfo);
    // This descriptor is a clone
    Descriptor operationDescriptor = operInfo.getDescriptor();
    if (operationDescriptor == null)
        throw new MBeanException(new ServiceNotFoundException(LocalizedStrings.MX4JModelMBean_OPERATION_DESCRIPTOR_FOR_OPERATION_0_CANNOT_BE_NULL.toLocalizedString(method)));
    String role = (String) operationDescriptor.getFieldValue("role");
    if (role == null || !role.equals("operation"))
        throw new MBeanException(new ServiceNotFoundException(LocalizedStrings.MX4JModelMBean_OPERATION_DESCRIPTOR_FIELD_ROLE_MUST_BE_OPERATION_NOT_0.toLocalizedString(role)));
    if (logger.isEnabledFor(Logger.DEBUG))
        logger.debug("Operation descriptor is: " + operationDescriptor);
    // This returns a clone of the mbean descriptor, we use it read only
    Descriptor mbeanDescriptor = info.getMBeanDescriptor();
    if (mbeanDescriptor == null)
        throw new MBeanException(new ServiceNotFoundException(LocalizedStrings.MX4JModelMBean_MBEAN_DESCRIPTOR_CANNOT_BE_NULL.toLocalizedString()));
    if (logger.isEnabledFor(Logger.DEBUG))
        logger.debug("MBean descriptor is: " + mbeanDescriptor);
    Object returnValue = null;
    String lastUpdateField = "lastReturnedTimeStamp";
    // Check if the method should be invoked given the cache settings
    int staleness = getStaleness(operationDescriptor, mbeanDescriptor, lastUpdateField);
    if (staleness == ALWAYS_STALE || staleness == STALE) {
        if (logger.isEnabledFor(Logger.TRACE))
            logger.trace("Value is stale");
        // Find parameters classes
        Class[] parameters = null;
        try {
            parameters = Utils.loadClasses(Thread.currentThread().getContextClassLoader(), params);
        } catch (ClassNotFoundException x) {
            logger.error(LocalizedStrings.MX4JModelMBean_CANNOT_FIND_OPERATIONS_PARAMETER_CLASSES, x);
            throw new ReflectionException(x);
        }
        if (logger.isEnabledFor(Logger.TRACE))
            logger.trace("Invoking operation...");
        // Find target object
        Object target = resolveTargetObject(operationDescriptor);
        returnValue = invokeMethod(target, method, parameters, arguments);
        if (logger.isEnabledFor(Logger.DEBUG))
            logger.debug("Returned value is: " + returnValue);
        if (returnValue != null) {
            Class parameter = returnValue.getClass();
            Class declared = loadClassWithContextClassLoader(operInfo.getReturnType());
            checkAssignability(parameter, declared);
        }
        // Cache the new value only if caching is needed
        if (staleness != ALWAYS_STALE) {
            operationDescriptor.setField("lastReturnedValue", returnValue);
            operationDescriptor.setField(lastUpdateField, Long.valueOf(System.currentTimeMillis()));
            if (logger.isEnabledFor(Logger.TRACE)) {
                logger.trace("Returned value has been cached");
            }
            // And now replace the descriptor with the updated clone
            info.setDescriptor(operationDescriptor, "operation");
        }
        if (logger.isEnabledFor(Logger.DEBUG))
            logger.debug("invoke for operation " + method + " returns invoked value: " + returnValue);
    } else {
        // Return cached value
        returnValue = operationDescriptor.getFieldValue("lastReturnedValue");
        if (returnValue != null) {
            Class parameter = returnValue.getClass();
            Class declared = loadClassWithContextClassLoader(operInfo.getReturnType());
            checkAssignability(parameter, declared);
        }
        if (logger.isEnabledFor(Logger.DEBUG))
            logger.debug("invoke for operation " + method + " returns cached value: " + returnValue);
    }
    // As an extension, persist this model mbean also after operation invocation, but using only
    // settings provided in the operation descriptor, without falling back to defaults set in
    // the MBean descriptor
    boolean persistNow = shouldPersistNow(operationDescriptor, null, lastUpdateField);
    int impact = operInfo.getImpact();
    if (persistNow && impact != MBeanOperationInfo.INFO) {
        if (logger.isEnabledFor(Logger.TRACE))
            logger.trace("Persisting this ModelMBean...");
        try {
            store();
            if (logger.isEnabledFor(Logger.TRACE))
                logger.trace("ModelMBean persisted successfully");
        } catch (Exception x) {
            logger.error(LocalizedStrings.MX4JModelMBean_CANNOT_STORE_MODELMBEAN_AFTER_OPERATION_INVOCATION, x);
            if (x instanceof MBeanException)
                throw (MBeanException) x;
            else
                throw new MBeanException(x);
        }
    }
    return returnValue;
}