/**
* Returns a map of MBeans with ObjectName as the key and MBeanInfo value of a given domain. If
* domain is <tt>null</tt>, all MBeans are returned. If no MBean found, an empty map is returned.
*/
public Map<ObjectName, MBeanInfo> getMBeans(String domain) throws IOException {
ObjectName name = null;
if (domain != null) {
try {
name = new ObjectName(domain + ":*");
} catch (MalformedObjectNameException e) {
// should not reach here
assert (false);
}
}
Set<ObjectName> mbeans = server.queryNames(name, null);
Map<ObjectName, MBeanInfo> result = new HashMap<ObjectName, MBeanInfo>(mbeans.size());
Iterator<ObjectName> iterator = mbeans.iterator();
while (iterator.hasNext()) {
Object object = iterator.next();
if (object instanceof ObjectName) {
ObjectName o = (ObjectName) object;
try {
MBeanInfo info = server.getMBeanInfo(o);
result.put(o, info);
} catch (IntrospectionException e) {
// TODO: should log the error
} catch (InstanceNotFoundException e) {
// TODO: should log the error
} catch (ReflectionException e) {
// TODO: should log the error
}
}
}
return result;
}
private synchronized NameValueMap getCachedAttributes(ObjectName objName, Set<String> attrNames)
throws InstanceNotFoundException, ReflectionException, IOException {
NameValueMap values = cachedValues.get(objName);
if (values != null && values.keySet().containsAll(attrNames)) {
return values;
}
attrNames = new TreeSet<String>(attrNames);
Set<String> oldNames = cachedNames.get(objName);
if (oldNames != null) {
attrNames.addAll(oldNames);
}
values = new NameValueMap();
final AttributeList attrs =
conn.getAttributes(objName, attrNames.toArray(new String[attrNames.size()]));
for (Attribute attr : attrs.asList()) {
values.put(attr.getName(), attr.getValue());
}
cachedValues.put(objName, values);
cachedNames.put(objName, attrNames);
return values;
}