Example usage for com.google.gwt.http.client RequestBuilder setHeader

List of usage examples for com.google.gwt.http.client RequestBuilder setHeader

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  6. setHeader

Introduction

In this page you can find the example usage for com.google.gwt.http.client RequestBuilder setHeader.

Prototype

public void setHeader(String header, String value)

Source Link

Document

Sets a request header with the given name and value.

Usage

From source file:org.pentaho.mantle.client.ui.xul.MantleController.java

License:Open Source License

/**
 * Called when the Xul Dom is ready, grab all Xul references here.
 */// w ww .  ja  v  a  2 s .c  om
@Bindable
public void init() {

    openBtn = (XulToolbarbutton) document.getElementById("openButton"); //$NON-NLS-1$
    newBtn = (XulToolbarbutton) document.getElementById("newButton"); //$NON-NLS-1$
    saveBtn = (XulToolbarbutton) document.getElementById("saveButton"); //$NON-NLS-1$
    saveAsBtn = (XulToolbarbutton) document.getElementById("saveAsButton"); //$NON-NLS-1$
    printBtn = (XulToolbarbutton) document.getElementById("printButton");

    contentEditBtn = (XulToolbarbutton) document.getElementById("editContentButton"); //$NON-NLS-1$

    bf = new GwtBindingFactory(document);
    bf.createBinding(model, "saveEnabled", saveBtn, "visible"); //$NON-NLS-1$ //$NON-NLS-2$
    bf.createBinding(model, "saveAsEnabled", saveAsBtn, "visible"); //$NON-NLS-1$ //$NON-NLS-2$
    bf.createBinding(model, "contentEditEnabled", contentEditBtn, "visible"); //$NON-NLS-1$ //$NON-NLS-2$
    bf.createBinding(model, "contentEditSelected", this, "editContentSelected"); //$NON-NLS-1$ //$NON-NLS-2$
    bf.createBinding(model, "printVisible", printBtn, "visible");

    saveMenuItem = (XulMenuitem) document.getElementById("saveMenuItem"); //$NON-NLS-1$
    saveAsMenuItem = (XulMenuitem) document.getElementById("saveAsMenuItem"); //$NON-NLS-1$
    useDescriptionsMenuItem = (XulMenuitem) document.getElementById("useDescriptionsMenuItem"); //$NON-NLS-1$
    showHiddenFilesMenuItem = (XulMenuitem) document.getElementById("showHiddenFilesMenuItem"); //$NON-NLS-1$
    languageMenu = (XulMenubar) document.getElementById("languagemenu"); //$NON-NLS-1$
    themesMenu = (XulMenubar) document.getElementById("themesmenu"); //$NON-NLS-1$
    toolsMenu = (XulMenubar) document.getElementById("toolsmenu"); //$NON-NLS-1$
    recentMenu = (XulMenubar) document.getElementById("recentmenu"); //$NON-NLS-1$
    favoriteMenu = (XulMenubar) document.getElementById("favoritesmenu"); //$NON-NLS-1$

    if (PerspectiveManager.getInstance().isLoaded()) {
        PerspectiveManager.getInstance().enablePerspective(PerspectiveManager.OPENED_PERSPECTIVE, false);
    } else {
        EventBusUtil.EVENT_BUS.addHandler(PerspectivesLoadedEvent.TYPE, new PerspectivesLoadedEventHandler() {
            public void onPerspectivesLoaded(PerspectivesLoadedEvent event) {
                PerspectiveManager.getInstance().enablePerspective(PerspectiveManager.OPENED_PERSPECTIVE,
                        false);
            }
        });
    }

    // install language sub-menus
    Map<String, String> supportedLanguages = Messages.getResourceBundle().getSupportedLanguages();
    if (supportedLanguages != null && supportedLanguages.keySet() != null && !supportedLanguages.isEmpty()) {
        MenuBar langMenu = (MenuBar) languageMenu.getManagedObject();
        langMenu.insertSeparator(0);
        for (String lang : supportedLanguages.keySet()) {
            MenuItem langMenuItem = new MenuItem(supportedLanguages.get(lang), new SwitchLocaleCommand(lang));
            langMenuItem.getElement().setId(supportedLanguages.get(lang) + "_menu_item"); //$NON-NLS-1$
            langMenu.insertItem(langMenuItem, 0);
        }
    }
    buildFavoritesAndRecent(false);

    UserSettingsManager.getInstance().getUserSettings(new AsyncCallback<JsArray<JsSetting>>() {
        public void onSuccess(JsArray<JsSetting> settings) {
            processSettings(settings);
        }

        public void onFailure(Throwable caught) {
        }
    }, false);

    EventBusUtil.EVENT_BUS.addHandler(UserSettingsLoadedEvent.TYPE, new UserSettingsLoadedEventHandler() {
        public void onUserSettingsLoaded(UserSettingsLoadedEvent event) {
            processSettings(event.getSettings());
        }

    });

    // install themes
    RequestBuilder getActiveThemeRequestBuilder = new RequestBuilder(RequestBuilder.GET,
            GWT.getHostPageBaseURL() + "api/theme/active"); //$NON-NLS-1$
    try {
        getActiveThemeRequestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
        getActiveThemeRequestBuilder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                // showError(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                final String activeTheme = response.getText();
                RequestBuilder getThemesRequestBuilder = new RequestBuilder(RequestBuilder.GET,
                        GWT.getHostPageBaseURL() + "api/theme/list"); //$NON-NLS-1$
                getThemesRequestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
                getThemesRequestBuilder.setHeader("accept", "application/json"); //$NON-NLS-1$ //$NON-NLS-2$

                try {
                    getThemesRequestBuilder.sendRequest(null, new RequestCallback() {
                        public void onError(Request arg0, Throwable arg1) {
                        }

                        public void onResponseReceived(Request request, Response response) {
                            try {
                                final String url = GWT.getHostPageBaseURL() + "api/repo/files/canAdminister"; //$NON-NLS-1$
                                RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, url);
                                requestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
                                requestBuilder.setHeader("accept", "text/plain"); //$NON-NLS-1$ //$NON-NLS-2$
                                requestBuilder.sendRequest(null, new RequestCallback() {

                                    public void onError(Request request, Throwable caught) {
                                    }

                                    public void onResponseReceived(Request request, Response response) {
                                        toolsMenu.setVisible("true".equalsIgnoreCase(response.getText())); //$NON-NLS-1$
                                        showHiddenFilesMenuItem
                                                .setVisible("true".equalsIgnoreCase(response.getText())); //$NON-NLS-1$
                                    }

                                });
                            } catch (RequestException e) {
                                Window.alert(e.getMessage());
                            }

                            JsArray<JsTheme> themes = JsTheme
                                    .getThemes(JsonUtils.escapeJsonForEval(response.getText()));

                            for (int i = 0; i < themes.length(); i++) {
                                JsTheme theme = themes.get(i);
                                PentahoMenuItem themeMenuItem = new PentahoMenuItem(theme.getName(),
                                        new SwitchThemeCommand(theme.getId()));
                                themeMenuItem.getElement().setId(theme.getId() + "_menu_item"); //$NON-NLS-1$
                                themeMenuItem.setChecked(theme.getId().equals(activeTheme));
                                ((MenuBar) themesMenu.getManagedObject()).addItem(themeMenuItem);
                            }

                            bf.createBinding(model, "saveEnabled", saveMenuItem, "visible"); //$NON-NLS-1$ //$NON-NLS-2$
                            bf.createBinding(model, "saveAsEnabled", saveAsMenuItem, "visible"); //$NON-NLS-1$ //$NON-NLS-2$

                            if (PerspectiveManager.getInstance().isLoaded()) {
                                executeAdminContent();
                            } else {
                                EventBusUtil.EVENT_BUS.addHandler(PerspectivesLoadedEvent.TYPE,
                                        new PerspectivesLoadedEventHandler() {
                                            public void onPerspectivesLoaded(PerspectivesLoadedEvent event) {
                                                executeAdminContent();
                                            }
                                        });
                            }

                            setupNativeHooks(MantleController.this);
                        }
                    });

                } catch (RequestException e) {
                    // showError(e);
                }
            }

        });

    } catch (RequestException e) {
        Window.alert(e.getMessage());
        // showError(e);
    }
}

From source file:org.pentaho.mantle.client.ui.xul.MantleController.java

License:Open Source License

private void executeAdminContent() {

    try {//from   w  w  w  .j  a  va2 s  .  com
        RequestCallback internalCallback = new RequestCallback() {

            public void onError(Request request, Throwable exception) {
            }

            public void onResponseReceived(Request request, Response response) {
                JsArray<JsSetting> jsSettings = null;
                try {
                    jsSettings = JsSetting.parseSettingsJson(response.getText());
                } catch (Throwable t) {
                    // happens when there are no settings
                }
                if (jsSettings == null) {
                    return;
                }
                for (int i = 0; i < jsSettings.length(); i++) {
                    String content = jsSettings.get(i).getValue();
                    StringTokenizer nameValuePairs = new StringTokenizer(content, ";"); //$NON-NLS-1$
                    String perspective = null, content_panel_id = null, content_url = null;
                    for (int j = 0; j < nameValuePairs.countTokens(); j++) {
                        String currentToken = nameValuePairs.tokenAt(j).trim();
                        if (currentToken.startsWith("perspective=")) { //$NON-NLS-1$
                            perspective = currentToken.substring("perspective=".length()); //$NON-NLS-1$
                        }
                        if (currentToken.startsWith("content-panel-id=")) { //$NON-NLS-1$
                            content_panel_id = currentToken.substring("content-panel-id=".length()); //$NON-NLS-1$
                        }
                        if (currentToken.startsWith("content-url=")) { //$NON-NLS-1$
                            content_url = currentToken.substring("content-url=".length()); //$NON-NLS-1$
                        }
                    }

                    if (content_panel_id != null && content_url != null) {
                        overrideContentPanelId = content_panel_id;
                        overrideContentUrl = content_url;
                    }

                    if (perspective != null) {
                        PerspectiveManager.getInstance().setPerspective(perspective);
                    }

                    if (perspective == null && content_panel_id == null && content_url == null) {
                        GwtMessageBox warning = new GwtMessageBox();
                        warning.setTitle(Messages.getString("warning")); //$NON-NLS-1$
                        warning.setMessage(content);
                        warning.setButtons(new Object[GwtMessageBox.ACCEPT]);
                        warning.setAcceptLabel(Messages.getString("close")); //$NON-NLS-1$
                        warning.show();
                    }
                }
            }
        };

        RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
                GWT.getHostPageBaseURL() + "api/mantle/getAdminContent"); //$NON-NLS-1$
        builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
        builder.setHeader("accept", "application/json"); //$NON-NLS-1$ //$NON-NLS-2$
        builder.sendRequest(null, internalCallback);
        // TO DO Reset the menuItem click for browser and workspace here?
    } catch (RequestException e) {
        //ignore
    }
}

From source file:org.pentaho.mantle.client.ui.xul.MantleXul.java

License:Open Source License

/**
 * Callback method for the MantleXulLoader. This is called when the Xul file has been processed.
 * // ww w  .  j  a  v  a2  s  .  c  o  m
 * @param runner
 *          GwtXulRunner instance ready for event handlers and initializing.
 */
public void xulLoaded(GwtXulRunner runner) {
    // handlers need to be wrapped generically in GWT, create one and pass it our reference.

    // instantiate our Model and Controller
    controller = new MantleController(new MantleModel(this));

    // Add handler to container
    container = (GwtXulDomContainer) runner.getXulDomContainers().get(0);
    container.addEventHandler(controller);

    try {
        runner.initialize();
    } catch (XulException e) {
        Window.alert("Error initializing XUL runner: " + e.getMessage()); //$NON-NLS-1$
        e.printStackTrace();
        return;
    }

    // Get the toolbar from the XUL doc
    Widget bar = (Widget) container.getDocumentRoot().getElementById("mainToolbarWrapper").getManagedObject(); //$NON-NLS-1$
    Widget xultoolbar = (Widget) container.getDocumentRoot().getElementById("mainToolbar").getManagedObject(); //$NON-NLS-1$
    xultoolbar.getElement().removeClassName("toolbar");
    toolbar.setStylePrimaryName("mainToolbar-Wrapper");
    toolbar.setWidget(bar);

    // Get the menubar from the XUL doc
    Widget menu = (Widget) container.getDocumentRoot().getElementById("mainMenubar").getManagedObject(); //$NON-NLS-1$
    menubar.setWidget(menu);

    // check based on user permissions
    final String moduleBaseURL = GWT.getModuleBaseURL();
    final String moduleName = GWT.getModuleName();
    final String contextURL = moduleBaseURL.substring(0, moduleBaseURL.lastIndexOf(moduleName));
    final String url = contextURL + "api/repo/files/canCreate"; //$NON-NLS-1$
    RequestBuilder executableTypesRequestBuilder = new RequestBuilder(RequestBuilder.GET, url);
    executableTypesRequestBuilder.setHeader("accept", "text/plain");
    executableTypesRequestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");

    try {
        executableTypesRequestBuilder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                // showError(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                if (response.getStatusCode() == Response.SC_OK) {
                    Boolean visible = new Boolean(response.getText());
                    controller.setMenuBarEnabled("newmenu", visible);
                    controller.setToolBarButtonEnabled("newButton", visible);
                }
            }
        });
    } catch (RequestException e) {
        // showError(e);
    }

    // get the admin perspective from the XUL doc
    Widget admin = (Widget) container.getDocumentRoot().getElementById("adminPerspective").getManagedObject(); //$NON-NLS-1$
    admin.setStyleName("admin-perspective");
    admin.getElement().getStyle().clearHeight();
    admin.getElement().getStyle().clearWidth();
    adminPerspective.setWidget(admin);

    Panel adminContentPanel = (Panel) container.getDocumentRoot().getElementById("adminContentPanel")
            .getManagedObject();
    adminContentPanel.add(adminContentDeck);
    adminContentDeck.setHeight("100%");
    adminContentDeck.getElement().getStyle().setProperty("height", "100%");
    fetchPluginOverlays();
}

From source file:org.pentaho.mantle.client.ui.xul.MantleXul.java

License:Open Source License

public void configureAdminCatTree() {
    String serviceUrl = GWT.getHostPageBaseURL() + "api/ldap/config/getAttributeValues";
    RequestBuilder executableTypesRequestBuilder = new RequestBuilder(RequestBuilder.GET, serviceUrl);
    executableTypesRequestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
    try {/*  www.j a  va  2 s. com*/
        executableTypesRequestBuilder.sendRequest(null, new RequestCallback() {
            public void onError(Request request, Throwable exception) {
            }

            public void onResponseReceived(Request request, Response response) {
                String securityProvider = response.getText();
                enableUsersRolesTreeItem(securityProvider.contains("DB_BASED_AUTHENTICATION"));
            }
        });
    } catch (RequestException e) {
        //ignored
    }
}

From source file:org.pentaho.mantle.client.ui.xul.MantleXul.java

License:Open Source License

private void fetchPluginOverlays() {
    AbstractCommand cmd = new AbstractCommand() {
        protected void performOperation(boolean feedback) {
            performOperation();/*from   w  w  w . ja v  a2s. c  o  m*/
        }

        protected void performOperation() {
            final String url = GWT.getHostPageBaseURL() + "api/plugin-manager/overlays"; //$NON-NLS-1$
            RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
            builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
            builder.setHeader("accept", "application/json");

            try {
                builder.sendRequest(null, new RequestCallback() {

                    public void onError(Request request, Throwable exception) {
                        Window.alert(exception.getMessage());
                    }

                    public void onResponseReceived(Request request, Response response) {

                        JsArray<JsXulOverlay> jsoverlays = JsXulOverlay
                                .parseJson(JsonUtils.escapeJsonForEval(response.getText()));

                        ArrayList<XulOverlay> overlays = new ArrayList<XulOverlay>();
                        for (int i = 0; i < jsoverlays.length(); i++) {
                            JsXulOverlay o = jsoverlays.get(i);
                            MantleXulOverlay overlay;
                            overlay = new MantleXulOverlay(o.getId(), o.getOverlayUri(), o.getSource(),
                                    o.getResourceBundleUri(), Integer.parseInt(o.getPriority()));
                            overlays.add(overlay);
                        }

                        MantleXul.this.addOverlays(overlays);

                        final String url = GWT.getHostPageBaseURL()
                                + "plugin/data-access/api/permissions/hasDataAccess"; //$NON-NLS-1$
                        RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
                        builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
                        builder.setHeader("accept", "application/json");

                        try {
                            builder.sendRequest(null, new RequestCallback() {

                                public void onError(Request request, Throwable exception) {
                                    Window.alert(exception.getMessage());
                                }

                                public void onResponseReceived(Request request, Response response) {
                                    if (response.getText().equals("true")) {
                                        controller.loadOverlay("dataaccess");
                                    }
                                }
                            });
                        } catch (RequestException e) {
                            // showError(e);
                        }
                    }
                });
            } catch (RequestException e) {
                // showError(e);
            }
        }
    };
    cmd.execute();
}

From source file:org.pentaho.mantle.client.usersettings.MantleSettingsManager.java

License:Open Source License

private void getMantleSettings(final AsyncCallback<HashMap<String, String>> callback) {
    final RequestCallback internalCallback = new RequestCallback() {

        public void onError(Request request, Throwable exception) {
            MessageDialogBox dialog = new MessageDialogBox(Messages.getString("error"), //$NON-NLS-1$
                    Messages.getString("couldNotGetUserSettings"), true, false, true); //$NON-NLS-1$
            dialog.center();/*from  w w  w.  j a  v  a 2  s  .  c  om*/
        }

        public void onResponseReceived(Request request, Response response) {

            JsArray<JsSetting> jsSettings = null;
            try {
                jsSettings = JsSetting.parseSettingsJson(response.getText());
            } catch (Throwable t) {
                // happens when there are no settings
            }

            for (int i = 0; i < jsSettings.length(); i++) {
                settings.put(jsSettings.get(i).getName(), jsSettings.get(i).getValue());
            }

            settings.put("is-administrator", "" + isAdministrator);
            if (callback != null) {
                callback.onSuccess(settings);
            }
            EventBusUtil.EVENT_BUS.fireEvent(new MantleSettingsLoadedEvent(settings));
        }
    };

    final RequestBuilder builder = new RequestBuilder(RequestBuilder.GET,
            GWT.getHostPageBaseURL() + "api/mantle/settings");
    builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
    builder.setHeader("accept", "application/json");

    try {
        final String url = GWT.getHostPageBaseURL() + "api/repo/files/canAdminister"; //$NON-NLS-1$
        RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, url);
        builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
        requestBuilder.setHeader("accept", "text/plain");
        requestBuilder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable caught) {
                try {
                    builder.sendRequest(null, internalCallback);
                } catch (RequestException e) {
                    //ignored
                }
                //CHECKSTYLE IGNORE Indentation FOR NEXT 1 LINES
                MantleSettingsManager.getInstance().isAdministrator = false;
            }

            public void onResponseReceived(Request request, Response response) {
                try {
                    builder.sendRequest(null, internalCallback);
                } catch (RequestException e) {
                    //ignored
                }
                //CHECKSTYLE IGNORE Indentation FOR NEXT 1 LINES
                MantleSettingsManager.getInstance().isAdministrator = isAdministrator;
            }

        });
    } catch (RequestException e) {
        Window.alert(e.getMessage());
    }
}

From source file:org.pentaho.mantle.client.usersettings.UserSettingsManager.java

License:Open Source License

private void getUserSettings(final AsyncCallback<JsArray<JsSetting>> callback) {
    final String url = GWT.getHostPageBaseURL() + "api/user-settings/list"; //$NON-NLS-1$
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
    builder.setHeader("accept", "application/json");
    builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");

    try {// www .java2  s .co m
        builder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                MessageDialogBox dialog = new MessageDialogBox(Messages.getString("error"), //$NON-NLS-1$
                        Messages.getString("couldNotGetUserSettings"), true, false, true); //$NON-NLS-1$
                dialog.center();
            }

            public void onResponseReceived(Request request, Response response) {
                JsArray<JsSetting> jsSettings = null;
                try {
                    jsSettings = JsSetting.parseSettingsJson(response.getText());
                } catch (Throwable t) {
                    // happens when there are no settings
                }
                //CHECKSTYLE IGNORE Indentation FOR NEXT 1 LINES
                getInstance().settings = jsSettings;
                if (callback != null) {
                    callback.onSuccess(settings);
                }
                EventBusUtil.EVENT_BUS.fireEvent(new UserSettingsLoadedEvent(settings));
            }

        });
    } catch (RequestException e) {
        // showError(e);
    }

}

From source file:org.pentaho.mantle.client.workspace.BlockoutPanel.java

License:Open Source License

private void makeServiceCall(final String urlSuffix, final RequestBuilder.Method httpMethod,
        final String requestData, final String acceptHeader, final RequestCallback callback) {
    String moduleBaseURL = GWT.getModuleBaseURL();
    String moduleName = GWT.getModuleName();
    String contextURL = moduleBaseURL.substring(0, moduleBaseURL.lastIndexOf(moduleName));
    final String url = contextURL + "api/scheduler/" + urlSuffix;
    RequestBuilder builder = new RequestBuilder(httpMethod, url);
    builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
    builder.setHeader("Content-Type", "application/json");
    if (!StringUtils.isEmpty(acceptHeader)) {
        builder.setHeader("accept", acceptHeader);
    }//from   w w w .  j av a2  s. c  o  m
    try {
        builder.sendRequest(requestData, callback);
    } catch (RequestException e) {
        // showError(e);
    }
}

From source file:org.pentaho.mantle.client.workspace.SchedulesPanel.java

License:Open Source License

public void refresh() {
    String moduleBaseURL = GWT.getModuleBaseURL();
    String moduleName = GWT.getModuleName();
    String contextURL = moduleBaseURL.substring(0, moduleBaseURL.lastIndexOf(moduleName));
    final String url = contextURL + "api/scheduler/jobs"; //$NON-NLS-1$
    RequestBuilder executableTypesRequestBuilder = new RequestBuilder(RequestBuilder.GET, url);
    executableTypesRequestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
    executableTypesRequestBuilder.setHeader("accept", "application/json");
    try {/*from  w  w w.j  ava2 s .c o m*/
        executableTypesRequestBuilder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                // showError(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                if (response.getStatusCode() == Response.SC_OK) {
                    allJobs = parseJson(JsonUtils.escapeJsonForEval(response.getText()));
                    filterAndShowData();
                }
            }
        });
    } catch (RequestException e) {
        // showError(e);
    }
}

From source file:org.pentaho.mantle.client.workspace.SchedulesPanel.java

License:Open Source License

private void updateControlSchedulerButtonState(final ToolbarButton controlSchedulerButton,
        final boolean isScheduler) {
    final String url = GWT.getHostPageBaseURL() + "api/scheduler/state"; //$NON-NLS-1$
    RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
    builder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
    try {//from   w  w  w .j a  va2 s  . co m
        builder.sendRequest(null, new RequestCallback() {

            public void onError(Request request, Throwable exception) {
                // showError(exception);
            }

            public void onResponseReceived(Request request, Response response) {
                boolean isRunning = "RUNNING".equalsIgnoreCase(response.getText());
                if (isRunning) {
                    controlSchedulerButton.setToolTip(Messages.getString("stopScheduler"));
                    controlSchedulerButton
                            .setImage(ImageUtil.getThemeableImage("icon-small", "icon-stop-scheduler"));
                } else {
                    controlSchedulerButton.setToolTip(Messages.getString("startScheduler"));
                    controlSchedulerButton
                            .setImage(ImageUtil.getThemeableImage("icon-small", "icon-start-scheduler"));
                }

                if (!isScheduler) {
                    controlSchedulerButton.setEnabled(false);
                } else {
                    controlSchedulerButton.setEnabled(true);
                }
            }
        });
    } catch (RequestException e) {
        // showError(e);
    }
}