Articles/SimplePortalIntegration: DemoPortlet.java

package com.itmill.toolkit.demo;

import java.io.IOException;
import java.io.PrintWriter;
import java.security.Principal;
import java.util.Map;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.Portlet;
import javax.portlet.PortletConfig;
import javax.portlet.PortletException;
import javax.portlet.PortletMode;
import javax.portlet.PortletRequest;
import javax.portlet.PortletSession;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.WindowState;

public class DemoPortlet implements Portlet {
        // The application to show
        protected String app = ""; // empty for root
        // theme to use for the application
        protected String theme = "default";
        // some applications might require that the height is specified
        protected String height = null; // e.g "200px"

        PortletConfig config;

        public void destroy() {
                config = null;
        }

        public void init(PortletConfig config) throws PortletException {
                this.config = config;
        }

        public void processAction(ActionRequest arg0, ActionResponse arg1)
                        throws PortletException, IOException {
                // not used
        }

        public void render(RenderRequest request, RenderResponse response)
                        throws PortletException, IOException {

                // display the IT Mill Toolkit application
                writeAjaxWindow(request, response);
        }

        protected void writeAjaxWindow(RenderRequest request,
                        RenderResponse response) throws IOException {

                response.setContentType("text/html");
                PrintWriter out = response.getWriter();

                // make portlet accessible via session
                // make the current window state, portlet mode and user principal
                // available via session
                PortletInfo uinfo = new PortletInfo(request.getPortletMode(), request
                                .getWindowState(), request.getUserPrincipal(), (Map) request
                                .getAttribute(PortletRequest.USER_INFO), config);
                PortletSession sess = request.getPortletSession();
                sess.setAttribute(sess.getPortletContext().getPortletContextName()
                                + "/" + app, uinfo, PortletSession.APPLICATION_SCOPE);

                // the main div, where the app will be rendered
                out.print("<div id=\"itmill-ajax-window\""
                                + (height == null ? "" : "style=\"height:" + height + "\"")
                                + "></div>");

                // load theme css
                String themeUri = request.getContextPath() + "/ITMILL/themes/" + theme;
                out.print("<link REL=\"stylesheet\" TYPE=\"text/css\" HREF=\""
                                + themeUri + "/styles.css\">");
                // some basic info for the app
                out
                                .print("<script type=\"text/javascript\">"
                                                + "var itmill = {appUri:'"
                                                + request.getContextPath()
                                                + "/"
                                                + app
                                                + "', pathInfo: '/', themeUri: null, versionInfo : {toolkitVersion:\"\",applicationVersion:\"\"}};");

                out.print("</script>");
                // start client (gwt)
                out
                                .print("<script src='"
                                                + request.getContextPath()
                                                + "/ITMILL/widgetsets/com.itmill.toolkit.terminal.gwt.DefaultWidgetSet/com.itmill.toolkit.terminal.gwt.DefaultWidgetSet.nocache.js'></script>");

        }

        public class PortletInfo {

                PortletMode mode;
                WindowState state;
                Principal userPrincipal;
                Map userInfo;
                PortletConfig config;

                public PortletInfo(PortletMode mode, WindowState state,
                                Principal userPrincipal, Map userInfo, PortletConfig config) {
                        this.mode = mode;
                        this.state = state;
                        this.userPrincipal = userPrincipal;
                        this.userInfo = userInfo;
                        this.config = config;
                }

                /**
                 * Gets the current portlet mode, VIEW / EDIT / HELP
                 * 
                 * @return the current portlet mode
                 */
                public PortletMode getPortletMode() {
                        return mode;
                }

                /**
                 * Gets the current window state, NORMAL / MAXIMIZED / MINIMIZED
                 * 
                 * @return the current window state
                 */
                public WindowState getWindowState() {
                        return state;
                }

                /**
                 * Gets the current UserPrincipal
                 * 
                 * @return current UserPrincipal, null if not logged in
                 */
                public Principal getUserPrincipal() {
                        return userPrincipal;
                }

                /**
                 * Gets the PortletConfig for this portlet
                 * 
                 * @return the PortletConfig
                 */
                public PortletConfig getConfig() {
                        return config;
                }

                /**
                 * Gets the user info for this portlet, as retreived from
                 * request.getAttribute(PortletRequest.USER_INFO);
                 * 
                 * @return the user info Map
                 */
                public Map getUserInfo() {
                        return userInfo;
                }
        }
}