| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. The ASF licenses this file to You |
| * under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. For additional information regarding |
| * copyright in this work, please see the NOTICE file in the top level |
| * directory of this distribution. |
| */ |
| |
| package org.apache.roller.weblogger.business.startup; |
| |
| import java.util.List; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.roller.weblogger.business.DatabaseProvider; |
| import org.apache.roller.weblogger.business.MailProvider; |
| import org.apache.roller.weblogger.config.WebloggerConfig; |
| |
| |
| /** |
| * Manages Roller Weblogger startup process. |
| */ |
| public final class WebloggerStartup { |
| |
| private static final Log LOG = LogFactory.getLog(WebloggerStartup.class); |
| |
| private static boolean prepared = false; |
| |
| private static DatabaseProvider dbProvider = null; |
| private static StartupException dbProviderException = null; |
| |
| private static MailProvider mailProvider = null; |
| |
| |
| // non-instantiable |
| private WebloggerStartup() {} |
| |
| |
| /** |
| * Is the Roller Weblogger app properly prepared to be bootstrapped? |
| */ |
| public static boolean isPrepared() { |
| return prepared; |
| } |
| |
| |
| /** |
| * Get a reference to the currently configured DatabaseProvider. |
| * |
| * @return DatabaseProvider The configured database provider. |
| * @throws IllegalStateException If the app has not been properly prepared yet. |
| */ |
| public static DatabaseProvider getDatabaseProvider() { |
| if (dbProvider == null) { |
| throw new IllegalStateException("Roller Weblogger has not been prepared yet"); |
| } |
| return dbProvider; |
| } |
| |
| |
| /** |
| * Get a reference to the exception thrown while instantiating the |
| * database provider, if any. |
| * |
| * @return StartupException Exception from db provider, or null if no exception thrown. |
| */ |
| public static StartupException getDatabaseProviderException() { |
| return dbProviderException; |
| } |
| |
| |
| /** |
| * Get a reference to the currently configured MailProvider, if available. |
| * |
| * @return MailProvider The configured mail provider, or null if none configured. |
| */ |
| public static MailProvider getMailProvider() { |
| return mailProvider; |
| } |
| |
| |
| /** |
| * Does the app need to create the database tables? |
| */ |
| public static boolean isDatabaseCreationRequired() { |
| return getDatabaseInstaller().isCreationRequired(); |
| } |
| |
| |
| /** |
| * Run database creation scripts. |
| */ |
| public static List<String> createDatabase() throws StartupException { |
| |
| DatabaseInstaller installer = getDatabaseInstaller(); |
| try { |
| installer.createDatabase(); |
| |
| // any time we've successfully installed a db we are prepared |
| prepared = true; |
| |
| } catch (StartupException se) { |
| throw new StartupException(se.getMessage(), se.getRootCause(), installer.getMessages()); |
| } |
| |
| return installer.getMessages(); |
| } |
| |
| |
| /** |
| * Does the app require any upgrading? |
| */ |
| public static boolean isDatabaseUpgradeRequired() { |
| return getDatabaseInstaller().isUpgradeRequired(); |
| } |
| |
| |
| /** |
| * Run database upgrade work, optionally including upgrade scripts. |
| */ |
| public static List<String> upgradeDatabase(boolean runScripts) |
| throws StartupException { |
| |
| DatabaseInstaller installer = getDatabaseInstaller(); |
| try { |
| installer.upgradeDatabase(true); |
| |
| // any time we've successfully upgraded a db we are prepared |
| prepared = true; |
| |
| } catch (StartupException se) { |
| throw new StartupException(se.getMessage(), se.getRootCause(), installer.getMessages()); |
| } |
| |
| return installer.getMessages(); |
| } |
| |
| |
| /** |
| * Get a database installer. |
| * |
| * @return DatabaseInstaller A database installer. |
| * @throws IllegalStateException If the database provider has not been properly setup yet. |
| */ |
| private static DatabaseInstaller getDatabaseInstaller() { |
| return new DatabaseInstaller(getDatabaseProvider(), new ClasspathDatabaseScriptProvider()); |
| } |
| |
| |
| /** |
| * Run the Roller Weblogger preparation sequence. |
| * |
| * This sequence is what prepares the core services of the application such |
| * as setting up the database and mail providers. |
| */ |
| public static void prepare() throws StartupException { |
| |
| // setup database provider |
| try { |
| dbProvider = new DatabaseProvider(); |
| } catch(StartupException ex) { |
| dbProviderException = ex; |
| throw ex; |
| } |
| |
| // setup mail provider, if configured |
| try { |
| mailProvider = new MailProvider(); |
| } catch(StartupException ex) { |
| LOG.warn("Failed to setup mail provider, continuing anyways.\n" |
| + "Reason: " + ex.getMessage()); |
| LOG.info("The cause of setting up mail provider error was: ", ex); |
| } |
| |
| // now we need to deal with database install/upgrade logic |
| if("manual".equals(WebloggerConfig.getProperty("installation.type"))) { |
| |
| // if we are doing manual install then all that is needed is the |
| // app handled database upgrade work, not the db scripts |
| DatabaseInstaller dbInstaller = getDatabaseInstaller(); |
| if (dbInstaller.isUpgradeRequired()) { |
| dbInstaller.upgradeDatabase(false); |
| } |
| |
| prepared = true; |
| |
| } else { |
| |
| // we are in auto install mode, so see if there is any work to do |
| DatabaseInstaller dbInstaller = getDatabaseInstaller(); |
| if (!dbInstaller.isCreationRequired() && |
| !dbInstaller.isUpgradeRequired()) { |
| prepared = true; |
| } |
| } |
| |
| } |
| |
| } |