/** Gets a proxy client for a given local virtual machine. */
public static ProxyClient getProxyClient(LocalVirtualMachine lvm) throws IOException {
final String key = getCacheKey(lvm);
ProxyClient proxyClient = cache.get(key);
if (proxyClient == null) {
proxyClient = new ProxyClient(lvm);
cache.put(key, proxyClient);
}
return proxyClient;
}
/** Gets a proxy client for a given "hostname:port". */
public static ProxyClient getProxyClient(
String hostName, int port, String userName, String password) throws IOException {
final String key = getCacheKey(hostName, port, userName, password);
ProxyClient proxyClient = cache.get(key);
if (proxyClient == null) {
proxyClient = new ProxyClient(hostName, port, userName, password);
cache.put(key, proxyClient);
}
return proxyClient;
}
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;
}