1 /* 2 * Copyright 2007 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.springframework.ws.transport.mail.monitor; 18 19 import javax.mail.Folder; 20 import javax.mail.Message; 21 import javax.mail.MessagingException; 22 import javax.mail.internet.MimeMessage; 23 24 import org.springframework.ws.transport.mail.support.MailTransportUtils; 25 26 /** 27 * Implementation of the {@link MonitoringStrategy} interface that uses a simple polling mechanism suitable for POP3 28 * servers. Since POP3 does not have a native mechanism to determine which messages are "new", this implementation 29 * simply retrieves all messages in the {@link Folder}, and delete them afterwards. All messages in the POP3 mailbox are 30 * therefore, by definition, new. 31 * <p/> 32 * Setting the {@link #setDeleteMessages(boolean) deleteMessages} property is therefore ignored: messages are always 33 * deleted. 34 * 35 * @author Arjen Poutsma 36 * @since 1.5.0 37 */ 38 public class Pop3PollingMonitoringStrategy extends PollingMonitoringStrategy { 39 40 public Pop3PollingMonitoringStrategy() { 41 super.setDeleteMessages(true); 42 } 43 44 public void setDeleteMessages(boolean deleteMessages) { 45 } 46 47 /** 48 * Re-opens the folder, if it closed. 49 */ 50 protected void afterSleep(Folder folder) throws MessagingException { 51 if (!folder.isOpen()) { 52 folder.open(Folder.READ_WRITE); 53 } 54 } 55 56 /** 57 * Simply returns {@link Folder#getMessages()}. 58 */ 59 protected Message[] searchForNewMessages(Folder folder) throws MessagingException { 60 return folder.getMessages(); 61 } 62 63 /** 64 * Deletes the given messages from the given folder, and closes it to expunge deleted messages. 65 * 66 * @param folder the folder to delete messages from 67 * @param messages the messages to delete 68 * @throws MessagingException in case of JavaMail errors 69 */ 70 protected void deleteMessages(Folder folder, Message[] messages) throws MessagingException { 71 super.deleteMessages(folder, messages); 72 // expunge deleted mails, and make sure we've retrieved them before closing the folder 73 for (int i = 0; i < messages.length; i++) { 74 new MimeMessage((MimeMessage) messages[i]); 75 } 76 MailTransportUtils.closeFolder(folder, true); 77 } 78 }