Spring Integration Mail в Google IMAP, как установить частоту проверки входящих сообщений

Question

У меня есть работающая интеграция spring-mail (Spring boot application), и я могу проверить мой почтовый ящик Google.
По умолчанию я заметил, что он проверяет мой почтовый ящик каждые 2 минуты.
Я не могу вспомнить ни один код, который устанавливаетвремя, когда он проверяет мой почтовый ящик.
Теперь у меня возникла проблема, поскольку бывают случаи (хотя редко), когда мое приложение не может прочитать из папки входящих сообщений.
Я просто получаю это в своем журнале attempting to receive mail from folder [INBOX] Что яЧтобы устранить проблему, перезапустите сервер tomcat, и теперь мое приложение сможет снова проверить свою электронную почту.

Журналы (с датой и временем):

2018-10-16 12:37:13 - attempting to receive mail from folder [INBOX]
2018-10-16 12:39:18 - attempting to receive mail from folder [INBOX]
2018-10-16 12:41:22 - attempting to receive mail from folder [INBOX]
2018-10-16 12:43:26 - attempting to receive mail from folder [INBOX]
2018-10-16 12:45:30 - attempting to receive mail from folder [INBOX]
2018-10-16 12:47:35 - attempting to receive mail from folder [INBOX]
2018-10-16 12:49:39 - attempting to receive mail from folder [INBOX]
2018-10-16 12:51:43 - attempting to receive mail from folder [INBOX]
2018-10-16 12:53:47 - attempting to receive mail from folder [INBOX]
2018-10-16 12:55:52 - attempting to receive mail from folder [INBOX]
2018-10-16 12:57:56 - attempting to receive mail from folder [INBOX]
2018-10-16 13:00:00 - attempting to receive mail from folder [INBOX]
2018-10-16 13:02:04 - attempting to receive mail from folder [INBOX]
2018-10-16 13:04:09 - attempting to receive mail from folder [INBOX]
2018-10-16 13:06:13 - attempting to receive mail from folder [INBOX]
2018-10-16 13:08:17 - attempting to receive mail from folder [INBOX]
2018-10-16 13:10:21 - attempting to receive mail from folder [INBOX]
2018-10-16 13:12:25 - attempting to receive mail from folder [INBOX]
2018-10-16 13:14:29 - attempting to receive mail from folder [INBOX]
2018-10-16 13:16:33 - attempting to receive mail from folder [INBOX]
2018-10-16 13:18:37 - attempting to receive mail from folder [INBOX]
2018-10-16 13:20:41 - attempting to receive mail from folder [INBOX]
2018-10-16 13:22:44 - attempting to receive mail from folder [INBOX]
2018-10-16 13:24:48 - attempting to receive mail from folder [INBOX]
2018-10-16 13:26:53 - attempting to receive mail from folder [INBOX]
2018-10-16 13:28:57 - attempting to receive mail from folder [INBOX]
2018-10-16 13:31:02 - attempting to receive mail from folder [INBOX]
2018-10-16 13:33:06 - attempting to receive mail from folder [INBOX]
2018-10-16 13:35:10 - attempting to receive mail from folder [INBOX]
2018-10-16 13:37:14 - attempting to receive mail from folder [INBOX]
2018-10-16 13:39:17 - attempting to receive mail from folder [INBOX]
2018-10-16 13:41:21 - attempting to receive mail from folder [INBOX]
2018-10-16 13:43:25 - attempting to receive mail from folder [INBOX]
2018-10-16 13:45:30 - attempting to receive mail from folder [INBOX]
2018-10-16 13:47:33 - attempting to receive mail from folder [INBOX]
2018-10-16 13:49:38 - attempting to receive mail from folder [INBOX]

Вопрос:
1. Как изменить время проверки входящей почты?
2. Это две (2) минуты или меньше - плохая идея?Я думаю, что Google может запретить ip доступ / проверку входящих сообщений.

Зависимость:

<dependency>
  <groupId>org.springframework.integration</groupId>
  <artifactId>spring-integration-mail</artifactId>
</dependency>

Mail Configuration:

@Configuration
public class MailConfig {

    ...

    @Bean
    @SuppressWarnings("Duplicates")
    @Qualifier(value = "javaMailSender")
    public JavaMailSender getJavaMailSender() {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(m_mailHost);
        mailSender.setPort(m_mailPort);
        mailSender.setUsername(m_mailUserEmail);
        mailSender.setPassword(m_mailPassword);
        Properties props = mailSender.getJavaMailProperties();
        props.put(PROPERTY_MAIL_TRANSPORT_PROTOCOL, m_mailProtocol);
        props.put(PROPERTY_MAIL_SMTP_AUTHENTICATION, m_mailSmtpAuth);
        props.put(PROPERTY_MAIL_SMTP_START_TLS_ENABLED, m_mailSmtpStartTlsEnabled);
        props.put(PROPERTY_MAIL_DEBUG, m_mailDebug);
        return mailSender;
    }

    @Bean
    @Qualifier(value = "imapMailFlow")
    public IntegrationFlow imapMailFlow() throws UnsupportedEncodingException {
        String user = URLEncoder.encode(mailUserEmail, ConstantUtil.CHARACTER_ENCODING);
        return IntegrationFlows
                .from(Mail.imapIdleAdapter("imaps://" + user + ":" + mailPassword + "@imap.gmail.com:993/inbox")
                        .javaMailProperties(p -> p.put("mail.debug", "false")
                                .put("mail.imap.socketFactory.class", "javax.net.ssl.SSLSocketFactory")
                                .put("mail.imap.socketFactory.fallback", "false").put("mail.store.protocol", "imaps"))
                        .shouldMarkMessagesAsRead(true).shouldDeleteMessages(false))
                .channel("receiveChannel").get();
    }

    ...

}

Было бы здорово, если бы вы могли дать ссылку с объяснениями.

Спасибо!

Answer 1

Установите cancelIdleInterval.

/**
 * IDLE commands will be terminated after this interval; useful in cases where a connection
 * might be silently dropped. A new IDLE will usually immediately be processed. Specified
 * in seconds; default 120 (2 minutes). RFC 2177 recommends an interval no larger than 29 minutes.
 * @param cancelIdleInterval the cancelIdleInterval to set
 * @since 3.0.5
 */
public void setCancelIdleInterval(long cancelIdleInterval) {
    this.cancelIdleInterval = cancelIdleInterval * 1000;
}

. В настоящее время он не предоставляется Java DSL, поэтому вам придется подключить ImapMailReceiver в качестве компонента.

EDIT

@Bean
public ImapMailReceiver receiver() {
    ImapMailReceiver receiver = new ImapMailReceiver("...some URL...");
    receiver.setCancelIdleInterval(300); // seconds
    receiver.setJavaMailProperties(javaMailProperties);
    return receiver;

}

@Bean
public IntegrationFlow mailFlow() {
    return IntegrationFlows.from(Mail.imapIdleAdapter(receiver()))
            // ...
            .get();
}