Java tutorial
/* * Copyright (c) 2011, Martijn Brinkers, Djigzo. * * This file is part of Djigzo email encryption. * * Djigzo is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License * version 3, 19 November 2007 as published by the Free Software * Foundation. * * Djigzo 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public * License along with Djigzo. If not, see <http://www.gnu.org/licenses/> * * Additional permission under GNU AGPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or * combining it with aspectjrt.jar, aspectjweaver.jar, tyrex-1.0.3.jar, * freemarker.jar, dom4j.jar, mx4j-jmx.jar, mx4j-tools.jar, * spice-classman-1.0.jar, spice-loggerstore-0.5.jar, spice-salt-0.8.jar, * spice-xmlpolicy-1.0.jar, saaj-api-1.3.jar, saaj-impl-1.3.jar, * wsdl4j-1.6.1.jar (or modified versions of these libraries), * containing parts covered by the terms of Eclipse Public License, * tyrex license, freemarker license, dom4j license, mx4j license, * Spice Software License, Common Development and Distribution License * (CDDL), Common Public License (CPL) the licensors of this Program grant * you additional permission to convey the resulting work. */ package mitm.application.djigzo.james.mailets; import javax.mail.MessagingException; import mitm.application.djigzo.User; import mitm.application.djigzo.james.DjigzoMailAttributes; import mitm.application.djigzo.james.DjigzoMailAttributesImpl; import mitm.application.djigzo.james.PortalInvitationValidator.ValidatorException; import mitm.application.djigzo.james.MailAddressUtils; import mitm.application.djigzo.james.PortalInvitationValidator; import mitm.application.djigzo.james.PortalInvitationDetails; import mitm.application.djigzo.james.PortalInvitations; import mitm.application.djigzo.service.SystemServices; import mitm.application.djigzo.workflow.UserWorkflow; import mitm.common.hibernate.DatabaseActionExecutor; import mitm.common.hibernate.DatabaseActionExecutorBuilder; import mitm.common.hibernate.SessionManager; import mitm.common.properties.HierarchicalPropertiesException; import mitm.common.util.Check; import org.apache.commons.lang.StringUtils; import org.apache.mailet.Mail; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Mailet that creates an invitation detail for every recipient. * * Supported mailet parameters: * * catchRuntimeExceptions : If true all RunTimeExceptions are caught * catchErrors : If true all Errors are caught * * @author Martijn Brinkers * */ public class CreatePortalInvitation extends AbstractDjigzoMailet { private final static Logger logger = LoggerFactory.getLogger(CreatePortalInvitation.class); /* * The number of times a database action should be retried when a ConstraintViolation occurs */ private final static int ACTION_RETRIES = 3; /* * The activation context key */ protected final static String ACTIVATION_CONTEXT_KEY = "invites"; /* * manages database sessions */ private SessionManager sessionManager; /* * Used for adding and retrieving users */ private UserWorkflow userWorkflow; /* * Used to execute database actions in a transaction */ private DatabaseActionExecutor actionExecutor; /* * Callback used to track user objects. */ private static class ActivationContext { /* * The invitations */ private final PortalInvitations invitations = new PortalInvitations(); public PortalInvitations getInvitations() { return invitations; } } @Override protected Logger getLogger() { return logger; } @Override public void initMailet() throws MessagingException { super.initMailet(); sessionManager = SystemServices.getSessionManager(); userWorkflow = SystemServices.getUserWorkflow(); actionExecutor = DatabaseActionExecutorBuilder.createDatabaseActionExecutor(sessionManager); assert (actionExecutor != null); } /* * Gets called by MailAddressHandler#handleRecipients to handle the user */ protected void onHandleUserEvent(User user) throws MessagingException { try { ActivationContext activationContext = getActivationContext().get(ACTIVATION_CONTEXT_KEY, ActivationContext.class); Check.notNull(activationContext, "activationContext"); String serverSecret = user.getUserPreferences().getProperties().getServerSecret(); if (StringUtils.isNotEmpty(serverSecret)) { PortalInvitationValidator validator = new PortalInvitationValidator(); long timestamp = System.currentTimeMillis(); validator.setEmail(user.getEmail()); validator.setTimestamp(timestamp); activationContext.getInvitations().put(user.getEmail(), new PortalInvitationDetails(timestamp, validator.calulateMAC(serverSecret))); } else { /* * Should not happen because the server secret should always be set */ logger.warn("Server secret not set for user " + user.getEmail()); } } catch (HierarchicalPropertiesException e) { throw new MessagingException("Error handling user " + user.getEmail(), e); } catch (ValidatorException e) { throw new MessagingException("Error calculating MAC for user " + user.getEmail(), e); } } @Override public void serviceMail(Mail mail) { try { ActivationContext activationContext = new ActivationContext(); /* * Place the ActivationContext in the context so we can use it in onHandleUserEvent */ getActivationContext().set(ACTIVATION_CONTEXT_KEY, activationContext); MailAddressHandler.HandleUserEventHandler eventHandler = new MailAddressHandler.HandleUserEventHandler() { @Override public void handleUser(User user) throws MessagingException { onHandleUserEvent(user); } }; MailAddressHandler mailAddressHandler = new MailAddressHandler(sessionManager, userWorkflow, actionExecutor, eventHandler, ACTION_RETRIES); mailAddressHandler.handleMailAddresses(MailAddressUtils.getRecipients(mail)); DjigzoMailAttributes attributes = new DjigzoMailAttributesImpl(mail); attributes.setPortalInvitations(activationContext.getInvitations()); } catch (MessagingException e) { getLogger().error("Error creating invitions.", e); } } }