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17 package org.springframework.ws.transport.mail.monitor;
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19 import javax.mail.Folder;
20 import javax.mail.Message;
21 import javax.mail.MessagingException;
22 import javax.mail.event.MessageCountAdapter;
23 import javax.mail.event.MessageCountEvent;
24 import javax.mail.event.MessageCountListener;
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26 import com.sun.mail.imap.IMAPFolder;
27 import org.springframework.util.Assert;
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39 public class ImapIdleMonitoringStrategy extends AbstractMonitoringStrategy {
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41 private MessageCountListener messageCountListener;
42
43 protected void waitForNewMessages(Folder folder) throws MessagingException, InterruptedException {
44 Assert.isInstanceOf(IMAPFolder.class, folder);
45 IMAPFolder imapFolder = (IMAPFolder) folder;
46
47 if (searchForNewMessages(folder).length > 0) {
48 return;
49 }
50 if (messageCountListener == null) {
51 createMessageCountListener();
52 }
53 folder.addMessageCountListener(messageCountListener);
54 try {
55 imapFolder.idle();
56 }
57 finally {
58 folder.removeMessageCountListener(messageCountListener);
59 }
60 }
61
62 private void createMessageCountListener() {
63 messageCountListener = new MessageCountAdapter() {
64 public void messagesAdded(MessageCountEvent e) {
65 Message[] messages = e.getMessages();
66 for (int i = 0; i < messages.length; i++) {
67 try {
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69 messages[i].getLineCount();
70 }
71 catch (MessagingException ex) {
72
73 }
74 }
75 }
76 };
77 }
78 }