/**
   * Enumerate the connections found in an XML node
   *
   * @param domNode a node to parse
   * @param host
   * @return
   */
  Set<ConnectionInfo> makeConnexion(JrdsElement domNode, Object parent) {
    Set<ConnectionInfo> connectionSet = new HashSet<ConnectionInfo>();

    // Check for the old SNMP connection node
    ConnectionInfo cnxSnmp = parseSnmp(domNode);
    if (cnxSnmp != null) connectionSet.add(cnxSnmp);

    for (JrdsElement cnxNode : domNode.getChildElementsByName("connection")) {
      String type = cnxNode.getAttribute("type");
      if (type == null) {
        logger.error("No type declared for a connection");
        continue;
      }
      String name = cnxNode.getAttribute("name");

      try {
        // Load the class for the connection
        @SuppressWarnings("unchecked")
        Class<? extends Connection<?>> connectionClass =
            (Class<? extends Connection<?>>) classLoader.loadClass(type);

        // Build the arguments vector for the connection
        List<Object> args = ArgFactory.makeArgs(cnxNode);

        // Resolve the bean for the connection
        Map<String, String> attrs = new HashMap<String, String>();
        for (JrdsElement attrNode : cnxNode.getChildElementsByName("attr")) {
          String attrName = attrNode.getAttribute("name");
          String textValue = Util.parseTemplate(attrNode.getTextContent(), parent);
          attrs.put(attrName, textValue);
        }
        ConnectionInfo cnx = new ConnectionInfo(connectionClass, name, args, attrs);
        connectionSet.add(cnx);
        logger.debug(Util.delayedFormatString("Added connection %s to node %s", cnx, parent));
      } catch (NoClassDefFoundError ex) {
        logger.warn("Connection class not found: " + type + ": " + ex);
      } catch (ClassCastException ex) {
        logger.warn(type + " is not a connection");
      } catch (LinkageError ex) {
        logger.warn(
            "Incompatible code version during connection creation of type " + type + ": " + ex, ex);
      } catch (Exception ex) {
        logger.warn("Error during connection creation of type " + type + ": " + ex, ex);
      }
    }
    return connectionSet;
  }
  public Probe<?, ?> makeProbe(JrdsElement probeNode, HostInfo host, Map<String, String> properties)
      throws InvocationTargetException {
    Probe<?, ?> p = null;
    String type = probeNode.attrMap().get("type");

    List<Map<String, Object>> dsList = doDsList(type, probeNode.getElementbyName("dslist"));
    if (dsList.size() > 0) {
      logger.trace(
          Util.delayedFormatString("Data source replaced for %s/%s: %s", host, type, dsList));
      ProbeDesc oldpd = pf.getProbeDesc(type);
      try {
        ProbeDesc pd = (ProbeDesc) oldpd.clone();
        pd.replaceDs(dsList);
        p = pf.makeProbe(pd);
      } catch (CloneNotSupportedException e) {
      }
    } else {
      p = pf.makeProbe(type);
    }
    if (p == null) return null;

    p.readProperties(pm);

    String timerName = probeNode.getAttribute("timer");
    if (timerName == null) timerName = Timer.DEFAULTNAME;
    Timer timer = timers.get(timerName);
    if (timer == null) {
      logger.error("Invalid timer '" + timerName + "' for probe " + host.getName() + "/" + type);
      return null;
    } else {
      logger.trace(Util.delayedFormatString("probe %s/%s will use timer %s", host, type, timer));
    }
    p.setStep(timer.getStep());
    p.setTimeout(timer.getTimeout());

    // The label is set
    String label = probeNode.getAttribute("label");
    if (label != null && !"".equals(label)) {
      logger.trace(Util.delayedFormatString("Adding label %s to %s", label, p));
      p.setLabel(jrds.Util.parseTemplate(label, host, properties));
      ;
    }

    // The host is set
    HostStarter shost = timer.getHost(host);
    p.setHost(shost);

    ProbeDesc pd = p.getPd();
    List<Object> args = ArgFactory.makeArgs(probeNode, host, properties);
    // Prepare the probe with the default beans values
    Map<String, String> defaultBeans = pd.getDefaultArgs();
    if (defaultBeans != null) {
      for (Map.Entry<String, String> e : defaultBeans.entrySet()) {
        try {
          String beanName = e.getKey();
          String beanValue = e.getValue();
          PropertyDescriptor bean = pd.getBeanMap().get(beanName);
          Object value;
          // If the last argument is a list, give it to the template parser
          Object lastArgs = args.isEmpty() ? null : args.get(args.size() - 1);
          if (lastArgs instanceof List) {
            value =
                ArgFactory.ConstructFromString(
                    bean.getPropertyType(), Util.parseTemplate(beanValue, host, lastArgs));
          } else {
            value =
                ArgFactory.ConstructFromString(
                    bean.getPropertyType(), jrds.Util.parseTemplate(beanValue, host));
          }
          logger.trace(
              jrds.Util.delayedFormatString(
                  "Adding bean %s=%s (%s) to default args", beanName, value, value.getClass()));
          bean.getWriteMethod().invoke(p, value);
        } catch (Exception ex) {
          throw new RuntimeException("Invalid default bean " + e.getKey(), ex);
        }
      }
    }

    // Resolve the beans
    try {
      setAttributes(probeNode, p, pd.getBeanMap(), host);
    } catch (IllegalArgumentException e) {
      logger.error(String.format("Can't configure %s for %s: %s", pd.getName(), host, e));
      return null;
    }

    if (!pf.configure(p, args)) {
      logger.error(p + " configuration failed");
      return null;
    }

    // A connected probe, register the needed connection
    // It can be defined within the node, referenced by it's name, or it's implied name
    if (p instanceof ConnectedProbe) {
      String connectionName = null;
      ConnectedProbe cp = (ConnectedProbe) p;
      // Register the connections defined within the probe
      for (ConnectionInfo ci : makeConnexion(probeNode, p)) {
        ci.register(p);
      }
      String connexionName = probeNode.getAttribute("connection");
      if (connexionName != null && !"".equals(connexionName)) {
        logger.trace(Util.delayedFormatString("Adding connection %s to %s", connexionName, p));
        connectionName = jrds.Util.parseTemplate(connexionName, host);
        cp.setConnectionName(connectionName);
      } else {
        connectionName = cp.getConnectionName();
      }
      // If the connection is not already registred, try looking for it
      // And register it with the host
      if (p.find(connectionName) == null) {
        if (logger.isTraceEnabled())
          logger.trace(
              Util.delayedFormatString(
                  "Looking for connection %s in %s", connectionName, host.getConnections()));
        ConnectionInfo ci = host.getConnection(connectionName);
        if (ci != null) ci.register(shost);
        else {
          logger.error(
              Util.delayedFormatString(
                  "Failed to find a connection %s for a probe %s", connectionName, cp));
          return null;
        }
      }
    }

    // A passive probe, perhaps a specific listener is defined
    if (p instanceof PassiveProbe) {
      PassiveProbe<?> pp = (PassiveProbe<?>) p;
      String listenerName = probeNode.getAttribute("listener");
      if (listenerName != null && !listenerName.trim().isEmpty()) {
        Listener<?, ?> l = listeners.get(listenerName);
        if (l != null) {
          pp.setListener(l);
        } else {
          logger.error(
              Util.delayedFormatString("Listener name not found for %s: %s", pp, listenerName));
        }
      }
    }

    shost.addProbe(p);
    return p;
  }