/* 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;
}
/**
* Define an operation. Explicit definition of an operation. Reflection is used to locate method
* called.
*
* @param opInfo
*/
public synchronized void defineOperation(ModelMBeanOperationInfo opInfo) {
_dirty = true;
Class oClass = _object.getClass();
try {
MBeanParameterInfo[] pInfo = opInfo.getSignature();
Class[] types = new Class[pInfo.length];
String method = opInfo.getName() + "(";
for (int i = 0; i < pInfo.length; i++) {
Class type = TypeUtil.fromName(pInfo[i].getType());
if (type == null)
type = Thread.currentThread().getContextClassLoader().loadClass(pInfo[i].getType());
types[i] = type;
method += (i > 0 ? "," : "") + pInfo[i].getType();
}
method += ")";
_method.put(method, oClass.getMethod(opInfo.getName(), types));
_operations.add(opInfo);
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
throw new IllegalArgumentException(e.toString());
}
}
/**
* Define an attribute. Explicit definition of an attribute. Reflection is used to locate the
* actual getter and setter methods.
*
* @param attrInfo ModelMBeanAttributeInfo.
*/
public synchronized void defineAttribute(ModelMBeanAttributeInfo attrInfo) {
if (_object == null) throw new IllegalStateException("No Object");
_dirty = true;
String name = attrInfo.getName();
String uName = name.substring(0, 1).toUpperCase() + name.substring(1);
Class oClass = _object.getClass();
try {
Class type = TypeUtil.fromName(attrInfo.getType());
if (type == null)
type = Thread.currentThread().getContextClassLoader().loadClass(attrInfo.getType());
Method getter = null;
Method setter = null;
if (attrInfo.isReadable())
getter =
oClass.getMethod((attrInfo.isIs() ? "is" : "get") + uName, (java.lang.Class[]) null);
if (attrInfo.isWritable()) setter = oClass.getMethod("set" + uName, new Class[] {type});
_getter.put(name, getter);
_setter.put(name, setter);
_attributes.add(attrInfo);
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
throw new IllegalArgumentException(e.toString());
}
}
/**
* Define an attribute on the managed object. The meta data is defined by looking for standard
* getter and setter methods. Descriptions are obtained with a call to findDescription with the
* attribute name.
*
* @param name The name of the attribute. Normal java bean capitlization is enforced on this name.
* @param writable If false, do not look for a setter.
* @param onMBean .
*/
public synchronized void defineAttribute(String name, boolean writable, boolean onMBean) {
_dirty = true;
String uName = name.substring(0, 1).toUpperCase() + name.substring(1);
name = java.beans.Introspector.decapitalize(name);
Class oClass = onMBean ? this.getClass() : _object.getClass();
Class type = null;
Method getter = null;
Method setter = null;
Method[] methods = oClass.getMethods();
for (int m = 0; m < methods.length; m++) {
if ((methods[m].getModifiers() & Modifier.PUBLIC) == 0) continue;
// Look for a getter
if (methods[m].getName().equals("get" + uName)
&& methods[m].getParameterTypes().length == 0) {
if (getter != null) throw new IllegalArgumentException("Multiple getters for attr " + name);
getter = methods[m];
if (type != null && !type.equals(methods[m].getReturnType()))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getReturnType();
}
// Look for an is getter
if (methods[m].getName().equals("is" + uName) && methods[m].getParameterTypes().length == 0) {
if (getter != null) throw new IllegalArgumentException("Multiple getters for attr " + name);
getter = methods[m];
if (type != null && !type.equals(methods[m].getReturnType()))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getReturnType();
}
// look for a setter
if (writable
&& methods[m].getName().equals("set" + uName)
&& methods[m].getParameterTypes().length == 1) {
if (setter != null) throw new IllegalArgumentException("Multiple setters for attr " + name);
setter = methods[m];
if (type != null && !type.equals(methods[m].getParameterTypes()[0]))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getParameterTypes()[0];
}
}
if (getter == null && setter == null)
throw new IllegalArgumentException("No getter or setters found for " + name);
try {
// Remember the methods
_getter.put(name, getter);
_setter.put(name, setter);
// create and add the info
_attributes.add(new ModelMBeanAttributeInfo(name, findDescription(name), getter, setter));
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
throw new IllegalArgumentException(e.toString());
}
}
/**
* Proxy MBean Constructor.
*
* @param proxyObject The actual object on which attributes and operations are to be defined and
* called.
*/
public ModelMBeanImpl(Object proxyObject) {
try {
setManagedResource(proxyObject, "objectReference");
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
throw new IllegalArgumentException(e.toString());
}
}
/**
* Define an operation on the managed object. Defines an operation with parameters. Refection is
* used to determine find the method and it's return type. The description of the method is found
* with a call to findDescription on "name(signature)". The name and description of each parameter
* is found with a call to findDescription with "name(partialSignature", the returned description
* is for the last parameter of the partial signature and is assumed to start with the parameter
* name, followed by a colon.
*
* @param name The name of the method call.
* @param signature The types of the operation parameters.
* @param impact Impact as defined in MBeanOperationInfo
* @param onMBean true if the operation is defined on the mbean
*/
public synchronized void defineOperation(
String name, String[] signature, int impact, boolean onMBean) {
_dirty = true;
Class oClass = onMBean ? this.getClass() : _object.getClass();
if (signature == null) signature = new String[0];
try {
Class[] types = new Class[signature.length];
MBeanParameterInfo[] pInfo = new MBeanParameterInfo[signature.length];
// Check types and build methodKey
String methodKey = name + "(";
for (int i = 0; i < signature.length; i++) {
Class type = TypeUtil.fromName(signature[i]);
if (type == null)
type = Thread.currentThread().getContextClassLoader().loadClass(signature[i]);
types[i] = type;
signature[i] = type.isPrimitive() ? TypeUtil.toName(type) : signature[i];
methodKey += (i > 0 ? "," : "") + signature[i];
}
methodKey += ")";
// Build param infos
for (int i = 0; i < signature.length; i++) {
String description = findDescription(methodKey + "[" + i + "]");
int colon = description.indexOf(":");
if (colon < 0) {
description = "param" + i + ":" + description;
colon = description.indexOf(":");
}
pInfo[i] =
new MBeanParameterInfo(
description.substring(0, colon).trim(),
signature[i],
description.substring(colon + 1).trim());
}
// build the operation info
Method method = oClass.getMethod(name, types);
Class returnClass = method.getReturnType();
_method.put(methodKey, method);
_operations.add(
new ModelMBeanOperationInfo(
name,
findDescription(methodKey),
pInfo,
returnClass.isPrimitive() ? TypeUtil.toName(returnClass) : (returnClass.getName()),
impact));
} catch (Exception e) {
log.warn("operation " + name, e);
throw new IllegalArgumentException(e.toString());
}
}