Question

我正在设法保存包含正文，主题等的简单消息。但是，我无法保存多部分消息。我在appendMessages之前和之后登录，但注意到第二个日志不存在。有趣的是，我没有被解雇的例外情况。我完全不知道这里出了什么问题。

这是我的Java代码：

    Store store = null;
    Folder folder = null;
    String folderName = "sentbox";
    try {
        Session session = prepareSession(MailProtocols.IMAP, kid);
        store = session.getStore("imap");
        store.connect(myHost, user.getLogin(), user.getPassword());
        folder = store.getFolder(folderName);

        if (folder == null || !folder.exists()) {
            folder.create(Folder.HOLDS_MESSAGES);
        }
        folder.open(Folder.READ_WRITE);
        MimeMessage mimeMessage = new MimeMessage(session);
        Address[] to = null;
        if(msg.getTo() != null) { // msg is an instance of custom message class, nothing special there
            int msgSize = msg.getTo().size();
             to = new InternetAddress[msgSize];
            for (int i = 0; i < msgSize; i++) {
                to[i] = new InternetAddress(msg.getTo().get(i));
            }
        }

        mimeMessage.setRecipients(RecipientType.TO, to);
        mimeMessage.setSentDate(new Date(System.currentTimeMillis()));
        mimeMessage.setSubject(msg.getSubject());

        if (msg.getFiles() != null) {
            MimeMultipart mp = new MimeMultipart();
            MimeBodyPart newPart = new MimeBodyPart();
            newPart.setText(msg.getBody());
            mp.addBodyPart(newPart);
            for (MultipartFile multipartFile : msg.getFiles()) {
                try {
                    newPart = new MimeBodyPart(); // create new part to each files
                    newPart.addHeader("My-File-Type", multipartFile.getContentType());
                    File tmpFile = File.createTempFile("newAttachment", ".tmp");
                    multipartFile.transferTo(tmpFile);
                    FileDataSource fds = new FileDataSource(tmpFile);
                    newPart.setDataHandler(new DataHandler(fds));
                    newPart.setFileName(multipartFile.getOriginalFilename());
                    newPart.setDisposition(Part.ATTACHMENT);
                    mp.addBodyPart(newPart);
                    tmpFile.deleteOnExit();
                } catch (IOException e) {
                    logger.debug("Can not create temp file ===========>");
                    e.printStackTrace();
                }
            }
            mimeMessage.setContent(mp);
            mimeMessage.saveChanges();
        } else {
            mimeMessage.setText(msg.getBody());
        }

        folder.appendMessages(new Message[] {mimeMessage});

        Message[] allMessages = folder.getMessages();
        UIDFolder uidFolder = (UIDFolder) folder;
        long savedMsgId = uidFolder.getUID(allMessages[allMessages.length - 1]);
                    logger.info("savedMsgId",savedMsgId + "") //cannot get this output at all

    } catch (Exception e) {
        logger.error(e);

    } finally {
        closeMailStore(store, folder); // just simple method which closes the store
    }

我正在使用Apache James 3.0.4。任何方法都欢迎

Answer 1

我正在使用Apache James 3.0.4

你不是指Apach James 3.0-beta4吗？即我们还没有达到3.0发布，所以没有3.0.4。你没有使用稳定版本（2.3.2）的任何原因？只是问......： - ）

我在appendMessages之前和之后记录，但注意到第二个日志不存在。

如果您从未在 folder.appendMessages（new Message [] {mimeMessage}）; 之后记录代码，那么有三种可能性：

在javax.mail / IO代码中抛出错误（或 Throwable ）。
示例包括IOError（令人讨厌的IO接口故障）， LinkageError（不兼容的jar /类）或CoderMalfunctionError （如果是解码/编码，则由CharsetDecoder或CharsetEncoder抛出循环抛出一个意外的异常）。
线程问题导致程序达到停顿状态 - 即线程饥饿或死锁
JVM进程崩溃

项目（1）到目前为止 最有可能。建议：将代码的尾部更改为：

} catch (Exception e) { logger.error(e); } catch (Throwable t) { logger.error(t); } finally { closeMailStore(store, folder); // just simple method which closes the store }

如果这会记录一个throwable，你可以根据app jars＆amp; amp;配置，OS / JVM版本或数据内容......

如果这不记录throwable，您可以调查（2）或（3）。

Answer 2

我在James 2.3.2中也遇到了同样的错误。我正在使用eclipse。在库设置中的eclipse中，我添加了JDK来代替JRE。然后我的问题得到了解决。尝试相同。它可能有效，因为你的代码看起来很好，我认为代码没有问题。

Answer 3

我找到了另一种方法，我正在这里，希望我可以帮助别人。我正在推翻Mailet的service方法。然后借助org.apache.james.mailbox.MessageManager的appendMessage方法，我可以简单地将我的信息添加到我想要的文件夹中。这是我的JAVA代码：

public class MyMailet extends GenericMailet {


@Resource(name = "mailboxmanager")
private MailboxManager mailboxManager;

private String sentbox;

@Override
public void init() throws MessagingException {
    super.init();     

    this.sentbox = getInitParameter("sent", "sentbox");
}


@SuppressWarnings("unchecked")
@Override
public void service(Mail mail) throws MessagingException {
    // Here, I am putting my logic which has to decide which folder to put
    // ...


    putToFolder(mail.getMessage(), mail.getSender().toString(), sentbox);

    mail.setState(Mail.GHOST);
}   

private long putToFolder(MimeMessage message, String userName, String folderName) throws MessagingException {
    MailboxSession session = null;
    long appendedMessageId;
    try {
        session = mailboxManager.createSystemSession(userName, new MailetContextLog(getMailetContext()));

        MessageManager mailbox = getMessageManager(session, userName, folderName);
        appendedMessageId = mailbox.appendMessage(new MimeMessageInputStream(message), new Date(), session, true, null);

    } catch (BadCredentialsException e) {
        throw new MessagingException("Unable to authenticate to mailbox", e);
    } catch (MailboxException e) {
        throw new MessagingException("Unable to access mailbox.", e);
    } finally {
        if (session != null) {
            session.close();
        }

        try {
            mailboxManager.logout(session, true);
            mailboxManager.endProcessingRequest(session);
        } catch (MailboxException e) {
            throw new MessagingException("Can logout from mailbox", e);
        }

    }

    return appendedMessageId;
}

private MessageManager getMessageManager(MailboxSession session, String userName, String folderName) throws MailboxException, MessagingException {
    mailboxManager.startProcessingRequest(session);

    MailboxPath path = new MailboxPath(MailboxConstants.USER_NAMESPACE, userName, folderName);

    if (!mailboxManager.mailboxExists(path, session)) {
        mailboxManager.createMailbox(path, session);
    }
    MessageManager messageManager = mailboxManager.getMailbox(path, session);
    if (messageManager == null) {
        throw new MessagingException("Mailbox for username " + userName + " was not found on this server.");
    }

    return messageManager;
  } 
}

正如我所料，它会附加任何没有概率的多部分消息。

无法将消息附加到javax.mail中的文件夹

3 个答案: