ee.pri.rl.blog.web.BlogApplication.java Source code

Introduction

Here is the source code for ee.pri.rl.blog.web.BlogApplication.java

Source

/**
 * Copyright (C) 2009 Raivo Laanemets <rl@starline.ee>
 *
 * This file is part of rl-blog.
 *
 * Foobar is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Foobar is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with rl-blog.  If not, see <http://www.gnu.org/licenses/>.
 */
package ee.pri.rl.blog.web;

import org.apache.log4j.Logger;
import org.apache.wicket.Page;
import org.apache.wicket.Request;
import org.apache.wicket.Response;
import org.apache.wicket.Session;
import org.apache.wicket.protocol.http.HttpSessionStore;
import org.apache.wicket.protocol.http.WebApplication;
import org.apache.wicket.session.ISessionStore;
import org.apache.wicket.settings.IExceptionSettings;
import org.springframework.web.context.support.WebApplicationContextUtils;

import ee.pri.rl.blog.service.BlogService;
import ee.pri.rl.blog.web.page.auth.BlogAuthorizationStrategy;
import ee.pri.rl.blog.web.page.auth.LoginPage;
import ee.pri.rl.blog.web.page.category.CategoryAddPage;
import ee.pri.rl.blog.web.page.category.CategoryDeletePage;
import ee.pri.rl.blog.web.page.category.CategoryListPage;
import ee.pri.rl.blog.web.page.category.CategoryPage;
import ee.pri.rl.blog.web.page.entry.EntryAddCommentPage;
import ee.pri.rl.blog.web.page.entry.EntryAddPage;
import ee.pri.rl.blog.web.page.entry.EntryDeleteCommentPage;
import ee.pri.rl.blog.web.page.entry.EntryDeletePage;
import ee.pri.rl.blog.web.page.entry.EntryListPage;
import ee.pri.rl.blog.web.page.entry.EntryViewPage;
import ee.pri.rl.blog.web.page.entry.edit.EntryDeleteFilePage;
import ee.pri.rl.blog.web.page.entry.edit.EntryEditPage;
import ee.pri.rl.blog.web.page.entry.edit.EntryFilesPage;
import ee.pri.rl.blog.web.page.error.BlogErrorPage;
import ee.pri.rl.blog.web.page.index.IndexPage;
import ee.pri.rl.blog.web.page.setting.SettingsPage;

/**
 * Web application class for the blog application. Here are configured how the
 * Wicket part of the application works.
 * 
 * @author Raivo Laanemets
 */
public class BlogApplication extends WebApplication {
    private static final Logger log = Logger.getLogger(BlogApplication.class);

    /**
     * Returns the default page of the blog application - index page.
     * 
     * @see IndexPage
     */
    @Override
    public Class<? extends Page> getHomePage() {
        return IndexPage.class;
    }

    @Override
    protected void init() {
        // Set the blog service for the service holder.
        BlogServiceHolder.set((BlogService) WebApplicationContextUtils.getWebApplicationContext(getServletContext())
                .getBean("blogService"));

        // See method comments.
        mountBookmarkablePages();
        configureSecurity();
        setupErrorHandling();
        setupDatabaseWhenNecessary();

        // Strip wicket:* tags from the HTML output.
        getMarkupSettings().setStripWicketTags(true);

        // Strip comments from HTML output.
        getMarkupSettings().setStripComments(true);
    }

    /**
     * Sets up the error handling.
     */
    private void setupErrorHandling() {
        // Page expired - redirect to the index page.
        getApplicationSettings().setPageExpiredErrorPage(IndexPage.class);
        // Internal error - show error page.
        getApplicationSettings().setInternalErrorPage(BlogErrorPage.class);
        // Unexpected exception - show error page.
        getExceptionSettings().setUnexpectedExceptionDisplay(IExceptionSettings.SHOW_INTERNAL_ERROR_PAGE);
    }

    /**
     * Mounts bookmarkable pages.
     */
    private void mountBookmarkablePages() {
        mountBookmarkablePage("index", IndexPage.class);
        mountBookmarkablePage("entry", EntryViewPage.class);
        mountBookmarkablePage("edit", EntryEditPage.class);
        mountBookmarkablePage("delete", EntryDeletePage.class);
        mountBookmarkablePage("comment", EntryAddCommentPage.class);
        mountBookmarkablePage("category", CategoryPage.class);
        mountBookmarkablePage("settings", SettingsPage.class);
        mountBookmarkablePage("addEntry", EntryAddPage.class);
        mountBookmarkablePage("addCategory", CategoryAddPage.class);
        mountBookmarkablePage("login", LoginPage.class);
        mountBookmarkablePage("entries", EntryListPage.class);
        mountBookmarkablePage("categories", CategoryListPage.class);
        mountBookmarkablePage("deleteCategory", CategoryDeletePage.class);
        mountBookmarkablePage("deleteComment", EntryDeleteCommentPage.class);
        mountBookmarkablePage("entryFiles", EntryFilesPage.class);
        mountBookmarkablePage("deleteFile", EntryDeleteFilePage.class);
        mountBookmarkablePage("error", BlogErrorPage.class);
    }

    /**
     * Sets up the blog database. Calls {@link BlogService#setUp()}.
     */
    private void setupDatabaseWhenNecessary() {
        try {
            BlogServiceHolder.get().setUp();
        } catch (Exception e) {
            log.error("Blog setup failed", e);
        }
    }

    /**
     * Configures blog application security.
     */
    private void configureSecurity() {
        // Sets the authorization strategy.
        getSecuritySettings().setAuthorizationStrategy(new BlogAuthorizationStrategy());

        // Page that is redirected to when non-authorized user
        // tries to access secured page.
        getApplicationSettings().setAccessDeniedPage(LoginPage.class);
    }

    /**
     * Method for creating a new custom blog session. Overrides
     * {@link WebApplication#newSession()}.
     */
    @Override
    public Session newSession(Request request, Response response) {
        return new BlogSession(request);
    }

    @Override
    protected ISessionStore newSessionStore() {
        return new HttpSessionStore(this);
    }

}