/**
* Adds descriptor fields from the <code>ManagedAttribute</code> attribute to the attribute
* descriptor. Specifically, adds the <code>currencyTimeLimit</code>, <code>default</code>, <code>
* persistPolicy</code> and <code>persistPeriod</code> descriptor fields if they are present in
* the metadata.
*/
protected void populateAttributeDescriptor(
Descriptor desc, Method getter, Method setter, String beanKey) {
ManagedAttribute gma =
(getter == null)
? ManagedAttribute.EMPTY
: this.attributeSource.getManagedAttribute(getter);
ManagedAttribute sma =
(setter == null)
? ManagedAttribute.EMPTY
: this.attributeSource.getManagedAttribute(setter);
applyCurrencyTimeLimit(
desc, resolveIntDescriptor(gma.getCurrencyTimeLimit(), sma.getCurrencyTimeLimit()));
Object defaultValue = resolveObjectDescriptor(gma.getDefaultValue(), sma.getDefaultValue());
desc.setField(FIELD_DEFAULT, defaultValue);
String persistPolicy = resolveStringDescriptor(gma.getPersistPolicy(), sma.getPersistPolicy());
if (StringUtils.hasLength(persistPolicy)) {
desc.setField(FIELD_PERSIST_POLICY, persistPolicy);
}
int persistPeriod = resolveIntDescriptor(gma.getPersistPeriod(), sma.getPersistPeriod());
if (persistPeriod >= 0) {
desc.setField(FIELD_PERSIST_PERIOD, Integer.toString(persistPeriod));
}
}
/**
* Adds descriptor fields from the <code>ManagedResource</code> attribute to the MBean descriptor.
* Specifically, adds the <code>currencyTimeLimit</code>, <code>persistPolicy</code>, <code>
* persistPeriod</code>, <code>persistLocation</code> and <code>persistName</code> descriptor
* fields if they are present in the metadata.
*/
protected void populateMBeanDescriptor(Descriptor desc, Object managedBean, String beanKey) {
ManagedResource mr = this.attributeSource.getManagedResource(getClassToExpose(managedBean));
if (mr == null) {
throw new InvalidMetadataException(
"No ManagedResource attribute found for class: " + getClassToExpose(managedBean));
}
applyCurrencyTimeLimit(desc, mr.getCurrencyTimeLimit());
if (mr.isLog()) {
desc.setField(FIELD_LOG, "true");
}
if (StringUtils.hasLength(mr.getLogFile())) {
desc.setField(FIELD_LOG_FILE, mr.getLogFile());
}
if (StringUtils.hasLength(mr.getPersistPolicy())) {
desc.setField(FIELD_PERSIST_POLICY, mr.getPersistPolicy());
}
if (mr.getPersistPeriod() >= 0) {
desc.setField(FIELD_PERSIST_PERIOD, Integer.toString(mr.getPersistPeriod()));
}
if (StringUtils.hasLength(mr.getPersistName())) {
desc.setField(FIELD_PERSIST_NAME, mr.getPersistName());
}
if (StringUtils.hasLength(mr.getPersistLocation())) {
desc.setField(FIELD_PERSIST_LOCATION, mr.getPersistLocation());
}
}
private static void test(int testno) throws Exception {
// com.sun.jmx.trace.TraceImplementation.init(2);
Resource resource = new Resource();
Class resourceClass = Resource.class;
Class rmmbClass = RequiredModelMBean.class;
Method setManagedResource =
rmmbClass.getMethod("setManagedResource", new Class[] {Object.class, String.class});
Method sendNotification =
rmmbClass.getMethod("sendNotification", new Class[] {Notification.class});
Method addAttributeChangeNL =
rmmbClass.getMethod(
"addAttributeChangeNotificationListener",
new Class[] {NotificationListener.class, String.class, Object.class});
Method getArray = resourceClass.getMethod("getArray", new Class[0]);
Method getNumber = resourceClass.getMethod("getNumber", new Class[0]);
Method setNumber = resourceClass.getMethod("setNumber", new Class[] {Integer.TYPE});
Method tweakArray = resourceClass.getMethod("tweakArray", new Class[] {Object[].class});
Method addOne = resourceClass.getMethod("addOne", new Class[] {Integer.TYPE});
MBeanServer mbs = MBeanServerFactory.newMBeanServer();
ObjectName on = new ObjectName("a:b=c");
Descriptor attrDescr = new DescriptorSupport();
attrDescr.setField("name", "Array");
attrDescr.setField("descriptorType", "attribute");
attrDescr.setField("getMethod", "getArray");
ModelMBeanAttributeInfo attrInfo =
new ModelMBeanAttributeInfo("Array", "array attr", getArray, null, attrDescr);
Descriptor attrDescr2 = new DescriptorSupport();
attrDescr2.setField("name", "Number");
attrDescr2.setField("descriptorType", "attribute");
attrDescr2.setField("getMethod", "getNumber");
attrDescr2.setField("setMethod", "setNumber");
ModelMBeanAttributeInfo attrInfo2 =
new ModelMBeanAttributeInfo("Number", "number attr", getNumber, setNumber, attrDescr2);
Descriptor attrDescr3 = new DescriptorSupport();
attrDescr3.setField("name", "Local");
attrDescr3.setField("descriptorType", "attribute");
attrDescr3.setField("currencyTimeLimit", "" + Integer.MAX_VALUE);
ModelMBeanAttributeInfo attrInfo3 =
new ModelMBeanAttributeInfo(
"Local", "java.lang.String", "local attr", true, true, false, attrDescr3);
Descriptor attrDescr4 = new DescriptorSupport();
attrDescr4.setField("name", "Local2");
attrDescr4.setField("descriptorType", "attribute");
ModelMBeanAttributeInfo attrInfo4 =
new ModelMBeanAttributeInfo(
"Local2", "java.lang.String", "local attr 2", true, true, false, attrDescr4);
ModelMBeanAttributeInfo[] attrs =
new ModelMBeanAttributeInfo[] {attrInfo, attrInfo2, attrInfo3, attrInfo4};
ModelMBeanOperationInfo operInfo = new ModelMBeanOperationInfo("getArray descr", getArray);
ModelMBeanOperationInfo operInfo2 = new ModelMBeanOperationInfo("getNumber descr", getNumber);
ModelMBeanOperationInfo operInfo3 = new ModelMBeanOperationInfo("addOne descr", addOne);
ModelMBeanOperationInfo operInfo4 = new ModelMBeanOperationInfo("setNumber descr", setNumber);
ModelMBeanOperationInfo operInfo5 = new ModelMBeanOperationInfo("tweakArray descr", tweakArray);
ModelMBeanOperationInfo operInfoSetManagedResource =
new ModelMBeanOperationInfo("setManagedResource descr", setManagedResource);
ModelMBeanOperationInfo operInfoSendNotification =
new ModelMBeanOperationInfo("sendNotification descr", sendNotification);
ModelMBeanOperationInfo operInfoAddAttributeChangeNL =
new ModelMBeanOperationInfo("AddAttributeChangeNL descr", addAttributeChangeNL);
ModelMBeanOperationInfo[] opers =
new ModelMBeanOperationInfo[] {
operInfo,
operInfo2,
operInfo3,
operInfo4,
operInfo5,
operInfoSetManagedResource,
operInfoSendNotification,
operInfoAddAttributeChangeNL
};
ModelMBeanInfo info =
new ModelMBeanInfoSupport(
Resource.class.getName(), "Resourcish resource", attrs, null, opers, null, null);
mbs.createMBean(
RequiredModelMBean.class.getName(),
on,
new Object[] {info},
new String[] {ModelMBeanInfo.class.getName()});
mbs.invoke(
on,
"setManagedResource",
new Object[] {resource, "objectReference"},
new String[] {"java.lang.Object", "java.lang.String"});
switch (testno) {
case 0:
{
/* Check getDescriptors("") on original MBeanInfo */
final Descriptor[] desc = info.getDescriptors("");
checkDescriptors(info, desc, "info.getDescriptors(\"\")");
break;
}
case 1:
{
/* Check getDescriptors(null) on original MBeanInfo */
final Descriptor[] desc = info.getDescriptors(null);
checkDescriptors(info, desc, "info.getDescriptors(null)");
break;
}
case 2:
{
/* Check getDescriptors("") on retrieved MBeanInfo */
final MBeanInfo mbi = mbs.getMBeanInfo(on);
final ModelMBeanInfo model = (ModelMBeanInfo) mbi;
final Descriptor[] desc = model.getDescriptors("");
checkDescriptors(info, desc, "model.getDescriptors(\"\")");
break;
}
case 3:
{
/* Check getDescriptors(null) on retrieved MBeanInfo */
final MBeanInfo mbi = mbs.getMBeanInfo(on);
final ModelMBeanInfo model = (ModelMBeanInfo) mbi;
final Descriptor[] desc = model.getDescriptors(null);
checkDescriptors(info, desc, "model.getDescriptors(null)");
break;
}
default:
System.err.println("UNKNOWN TEST NUMBER " + testno);
break;
}
}
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;
}
public void setAttribute(Attribute attribute)
throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException,
ReflectionException {
if (attribute == null)
throw new RuntimeOperationsException(
new IllegalArgumentException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_CANNOT_BE_NULL.toLocalizedString()));
Logger logger = getLogger();
// No need to synchronize: I work mostly on clones
// I want the real info, not its clone
ModelMBeanInfo info = getModelMBeanInfo();
if (info == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_MODELMBEANINFO_IS_NULL.toLocalizedString());
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("ModelMBeanInfo is: " + info);
String attrName = attribute.getName();
Object attrValue = attribute.getValue();
// This is a clone, we use it read only
ModelMBeanAttributeInfo attrInfo = info.getAttribute(attrName);
if (attrInfo == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_CANNOT_FIND_MODELMBEANATTRIBUTEINFO_FOR_ATTRIBUTE_0
.toLocalizedString(attrName));
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("Attribute info is: " + attrInfo);
if (!attrInfo.isWritable())
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_0_IS_NOT_WRITABLE.toLocalizedString(attrName));
// This returns a clone of the mbean descriptor, we use it read only
Descriptor mbeanDescriptor = info.getMBeanDescriptor();
if (mbeanDescriptor == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_MBEAN_DESCRIPTOR_CANNOT_BE_NULL.toLocalizedString());
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("MBean descriptor is: " + mbeanDescriptor);
// This descriptor is a clone
Descriptor attributeDescriptor = attrInfo.getDescriptor();
if (attributeDescriptor == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_DESCRIPTOR_FOR_ATTRIBUTE_0_CANNOT_BE_NULL
.toLocalizedString(attrName));
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug("Attribute descriptor is: " + attributeDescriptor);
String lastUpdateField = "lastUpdatedTimeStamp";
Object oldValue = null;
try {
oldValue = getAttribute(attrName);
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug("Previous value of attribute " + attrName + ": " + oldValue);
} catch (Exception x) {
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug("Cannot get previous value of attribute " + attrName, x);
}
// Check if setMethod is present
String method = (String) attributeDescriptor.getFieldValue("setMethod");
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("setMethod field is: " + method);
if (method != null) {
Class declared = loadClassWithContextClassLoader(attrInfo.getType());
if (attrValue != null) {
Class parameter = attrValue.getClass();
checkAssignability(parameter, declared);
}
// As an extension, allow attributes to be called on target objects also
Object target = resolveTargetObject(attributeDescriptor);
invokeMethod(target, method, new Class[] {declared}, new Object[] {attrValue});
// Cache the value only if currencyTimeLimit is not 0, ie it is not always stale
int staleness = getStaleness(attributeDescriptor, mbeanDescriptor, lastUpdateField);
if (staleness != ALWAYS_STALE) {
attributeDescriptor.setField("value", attrValue);
attributeDescriptor.setField(lastUpdateField, Long.valueOf(System.currentTimeMillis()));
if (logger.isEnabledFor(Logger.TRACE)) logger.trace("Attribute's value has been cached");
} else {
if (logger.isEnabledFor(Logger.TRACE))
logger.trace("Always stale, avoiding to cache attribute's value");
}
} else {
if (attrValue != null) {
Class parameter = attrValue.getClass();
Class declared = loadClassWithContextClassLoader(attrInfo.getType());
checkAssignability(parameter, declared);
}
// Always store the value in the descriptor: no setMethod
attributeDescriptor.setField("value", attrValue);
}
// And now replace the descriptor with the updated clone
info.setDescriptor(attributeDescriptor, "attribute");
// Send notifications to listeners
if (logger.isEnabledFor(Logger.TRACE)) logger.trace("Sending attribute change notifications");
sendAttributeChangeNotification(new Attribute(attrName, oldValue), attribute);
// Persist this ModelMBean
boolean persistNow = shouldPersistNow(attributeDescriptor, mbeanDescriptor, lastUpdateField);
if (persistNow) {
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_SETATTRIBUTE, x);
if (x instanceof MBeanException) throw (MBeanException) x;
else throw new MBeanException(x);
}
}
}
public Object getAttribute(String attribute)
throws AttributeNotFoundException, MBeanException, ReflectionException {
if (attribute == null)
throw new RuntimeOperationsException(
new IllegalArgumentException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_NAME_CANNOT_BE_NULL.toLocalizedString()));
Logger logger = getLogger();
// I want the real info, not its clone
ModelMBeanInfo info = getModelMBeanInfo();
if (info == null)
throw new AttributeNotFoundException(
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
ModelMBeanAttributeInfo attrInfo = info.getAttribute(attribute);
if (attrInfo == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_CANNOT_FIND_MODELMBEANATTRIBUTEINFO_FOR_ATTRIBUTE_0
.toLocalizedString(attribute));
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("Attribute info is: " + attrInfo);
if (!attrInfo.isReadable())
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_0_IS_NOT_READABLE.toLocalizedString(attribute));
// This returns a clone of the mbean descriptor, we use it read only
Descriptor mbeanDescriptor = info.getMBeanDescriptor();
if (mbeanDescriptor == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_MBEAN_DESCRIPTOR_CANNOT_BE_NULL.toLocalizedString());
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("MBean descriptor is: " + mbeanDescriptor);
// This descriptor is a clone
Descriptor attributeDescriptor = attrInfo.getDescriptor();
if (attributeDescriptor == null)
throw new AttributeNotFoundException(
LocalizedStrings.MX4JModelMBean_ATTRIBUTE_DESCRIPTOR_FOR_ATTRIBUTE_0_CANNOT_BE_NULL
.toLocalizedString(attribute));
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug("Attribute descriptor is: " + attributeDescriptor);
Object returnValue = null;
String lastUpdateField = "lastUpdatedTimeStamp";
int staleness = getStaleness(attributeDescriptor, mbeanDescriptor, lastUpdateField);
if (staleness == ALWAYS_STALE || staleness == STALE) {
if (logger.isEnabledFor(Logger.TRACE)) logger.trace("Value is stale");
String getter = (String) attributeDescriptor.getFieldValue("getMethod");
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("getMethod field is: " + getter);
if (getter == null) {
// No getter, use default value
returnValue = attributeDescriptor.getFieldValue("default");
if (returnValue != null) {
// Check if the return type is of the same type
// As an extension allow covariant return type
Class returned = returnValue.getClass();
Class declared = loadClassWithContextClassLoader(attrInfo.getType());
checkAssignability(returned, declared);
}
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug(
"getAttribute for attribute " + attribute + " returns default value: " + returnValue);
} else {
if (logger.isEnabledFor(Logger.TRACE)) logger.trace("Invoking attribute getter...");
// As an extension, allow attributes to be called on target objects also
Object target = resolveTargetObject(attributeDescriptor);
returnValue = invokeMethod(target, getter, new Class[0], new Object[0]);
if (logger.isEnabledFor(Logger.DEBUG)) logger.debug("Returned value is: " + returnValue);
if (returnValue != null) {
// Check if the return type is of the same type
// As an extension allow covariant return type
Class returned = returnValue.getClass();
Class declared = loadClassWithContextClassLoader(attrInfo.getType());
checkAssignability(returned, declared);
}
// Cache the new value only if caching is needed
if (staleness != ALWAYS_STALE) {
attributeDescriptor.setField("value", returnValue);
attributeDescriptor.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(attributeDescriptor, "attribute");
}
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug(
"getAttribute for attribute " + attribute + " returns invoked value: " + returnValue);
}
} else {
// Return cached value
returnValue = attributeDescriptor.getFieldValue("value");
if (returnValue != null) {
// Check if the return type is of the same type
// As an extension allow covariant return type
Class returned = returnValue.getClass();
Class declared = loadClassWithContextClassLoader(attrInfo.getType());
checkAssignability(returned, declared);
}
if (logger.isEnabledFor(Logger.DEBUG))
logger.debug(
"getAttribute for attribute " + attribute + " returns cached value: " + returnValue);
}
// Puff, everything went ok
return returnValue;
}