Loading Tab on Click Event of Menu Item

/**
	 * Creates a page from a zul-file in a tab in the center area of the
	 * borderlayout. Checks if the tab is opened before. If yes than it selects
	 * this tab.
	 * 
	 * @param zulFilePathName
	 *            The ZulFile Name with path.
	 * @param tabName
	 *            The tab name.
	 * @throws InterruptedException
	 */
	private void showPage(String zulFilePathName, String tabName)
			throws InterruptedException {

		try {
			// TODO get the parameter for working with tabs from the application
			// params
			int workWithTabs = 1;

			if (workWithTabs == 1) {

				/* get an instance of the borderlayout defined in the zul-file */
				Borderlayout bl = (Borderlayout) Path
						.getComponent("/outerIndexWindow/borderlayoutMain");
				/* get an instance of the searched CENTER layout area */
				Center center = bl.getCenter();
				// get the tabs component
				Tabs tabs = (Tabs) center.getFellow("divCenter").getFellow(
						"tabBoxIndexCenter").getFellow("tabsIndexCenter");

				/**
				 * Check if the tab is already opened than select them and<br>
				 * go out of here. If not than create them.<br>
				 */

				Tab checkTab = null;
				try {
					// checkTab = (Tab) tabs.getFellow(tabName);
					checkTab = (Tab) tabs.getFellow("tab_" + tabName.trim());
					checkTab.setSelected(true);
				} catch (ComponentNotFoundException ex) {
					// Ignore if can not get tab.
				}

				if (checkTab == null) {

					Tab tab = new Tab();
					tab.setId("tab_" + tabName.trim());
					tab.setLabel(tabName.trim());
					tab.setClosable(true);

					tab.setParent(tabs);

					Tabpanels tabpanels = (Tabpanels) center.getFellow(
							"divCenter").getFellow("tabBoxIndexCenter")
							.getFellow("tabsIndexCenter").getFellow(
									"tabpanelsBoxIndexCenter");
					Tabpanel tabpanel = new Tabpanel();
					tabpanel.setHeight("100%");
					tabpanel.setStyle("padding: 0px;");
					tabpanel.setParent(tabpanels);

					/*
					 * create the page and put it in the tabs area
					 */
					Executions
							.createComponents(zulFilePathName, tabpanel, null);
					tab.setSelected(true);
				}
			} else {
				/* get an instance of the borderlayout defined in the zul-file */
				Borderlayout bl = (Borderlayout) Path
						.getComponent("/outerIndexWindow/borderlayoutMain");
				/* get an instance of the searched CENTER layout area */
				Center center = bl.getCenter();
				/* clear the center child comps */
				center.getChildren().clear();
				/*
				 * create the page and put it in the center layout area
				 */
				Executions.createComponents(zulFilePathName, center, null);
			}

			if (logger.isDebugEnabled()) {
				logger.debug("--> calling zul-file: " + zulFilePathName);
			}
		} catch (Exception e) {
			Messagebox.show(e.toString());
		}
	}