private static String[] findStandardMBeans(URL codeBase) throws Exception {
Set<String> names;
if (codeBase.getProtocol().equalsIgnoreCase("file") && codeBase.toString().endsWith("/"))
names = findStandardMBeansFromDir(codeBase);
else names = findStandardMBeansFromJar(codeBase);
Set<String> standardMBeanNames = new TreeSet<String>();
for (String name : names) {
if (name.endsWith("MBean")) {
String prefix = name.substring(0, name.length() - 5);
if (names.contains(prefix)) standardMBeanNames.add(prefix);
}
}
return standardMBeanNames.toArray(new String[0]);
}
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;
}