Examples with POP3Client org.apache.commons.net.pop3.POP3Client used on opensource projects

Example 1 with POP3Client

use of org.apache.commons.net.pop3.POP3Client in project gerrit by GerritCodeReview.

the class Pop3MailReceiver method handleEmails.

/**
 * Opens a connection to the mail server, removes emails where deletion is pending, reads new
 * email and closes the connection.
 *
 * @param async determines if processing messages should happen asynchronously
 * @throws MailTransferException in case of a known transport failure
 * @throws IOException in case of a low-level transport failure
 */
@Override
public synchronized void handleEmails(boolean async) throws MailTransferException, IOException {
    POP3Client pop3;
    if (mailSettings.encryption != Encryption.NONE) {
        pop3 = new POP3SClient(mailSettings.encryption.name(), true);
    } else {
        pop3 = new POP3Client();
    }
    if (mailSettings.port > 0) {
        pop3.setDefaultPort(mailSettings.port);
    }
    pop3.connect(mailSettings.host);
    try {
        if (!pop3.login(mailSettings.username, mailSettings.password)) {
            throw new MailTransferException("Could not login to POP3 email server. Check username and password");
        }
        try {
            POP3MessageInfo[] messages = pop3.listMessages();
            if (messages == null) {
                throw new MailTransferException("Could not retrieve message list via POP3");
            }
            logger.atInfo().log("Received %d messages via POP3", messages.length);
            // Fetch messages
            List<MailMessage> mailMessages = new ArrayList<>();
            for (POP3MessageInfo msginfo : messages) {
                if (msginfo == null) {
                    // Message was deleted
                    continue;
                }
                try (BufferedReader reader = (BufferedReader) pop3.retrieveMessage(msginfo.number)) {
                    if (reader == null) {
                        throw new MailTransferException("Could not retrieve POP3 message header for message " + msginfo.identifier);
                    }
                    int[] message = fetchMessage(reader);
                    MailMessage mailMessage = RawMailParser.parse(message);
                    // 822 and delete the message if deletion is pending.
                    if (pendingDeletion.contains(mailMessage.id())) {
                        if (pop3.deleteMessage(msginfo.number)) {
                            pendingDeletion.remove(mailMessage.id());
                        } else {
                            logger.atSevere().log("Could not delete message %d", msginfo.number);
                        }
                    } else {
                        // Process message further
                        mailMessages.add(mailMessage);
                    }
                } catch (MailParsingException e) {
                    logger.atSevere().log("Could not parse message %d", msginfo.number);
                }
            }
            dispatchMailProcessor(mailMessages, async);
        } finally {
            pop3.logout();
        }
    } finally {
        pop3.disconnect();
    }
}