public void init(Map whiteboard) {
    mWhiteBoard = whiteboard;

    // Get handle to broker
    mBroker = new ConfigBrokerProxy();

    // Create a context
    mContext = (ConfigContext) mWhiteBoard.get("context");

    mNodesListModel = new ConfigPtrListModel(mContext);
    mNodesListModel.addElementType(CLUSTER_NODE_TYPE);
    mBroker.addConfigListener(mNodesListModel);
    lstNodes.setModel(mNodesListModel);

    mHostnameField.setText("");
  }