Sping集成邮件空闲接收器中的问题

Question

我使用spring integration mail来接收来自多个可配置帐户的邮件消息。

我正在使用IMAP服务器和idle配置

我写了以下代码：

@Autowired
private IntegrationFlowContext flowContext;
IntegrationFlow flow = null;
String userFlag = confMailIn.getHost() + "_idle_adapter";
ImapIdleChannelAdapterSpec imapIdleChannelAdapterSpec = Mail.imapIdleAdapter(connectionUrl.toString())
        .javaMailProperties(javaMailProperties)
        .shouldDeleteMessages(deleteMessages)
        .shouldMarkMessagesAsRead(markMessagesRead)
        .autoStartup(true)
        .autoCloseFolder(false)
        .userFlag(userFlag)
        .id(userFlag)
        //.searchTermStrategy(this::notSeenTerm)
        .selector(selectFunction);

if (confMailIn.isRichiedeAutenticazione()) {
    imapIdleChannelAdapterSpec = imapIdleChannelAdapterSpec.javaMailAuthenticator(new CasellaPostaleAuthenticator(cpd.getIndirizzoMail(), cpd.getUsername(), cpd.getPassword()));
}
flow = IntegrationFlows
        .from(imapIdleChannelAdapterSpec)
        .handle(message ->{
            //Prendo il closable del messaggio e valorizzo i l'elenco di closeale da chiudere
            Closeable closeable = StaticMessageHeaderAccessor.getCloseableResource(message);
            if( !closeables.containsKey(cpd.getIndirizzoMail()) ) {
                closeables.put(cpd.getIndirizzoMail(), closeable);
            }
            publishMailEvent(message);
        })
        .get();
flowContext.registration(flow).id(flowId).register();

我将自动关闭文件夹设置为假，因为如果这是真的，我将无法处理邮件消息，因为我收到了一个FolderClosedException。因此，我收集了所有的Closeable对象，并在关闭Spring context时关闭它们(在最好的情况下...从不:)

到目前为止一切顺利..。我注册了流，它就开始工作了。但我注意到，在一段时间后，它停止了接收邮件消息。我需要重新启动我的服务，它再次工作了一段时间。

当它工作时，我会看到这些日志：

2020-04-20 16:32:57,427 25199841 [scheduling-1] DEBUG o.s.i.mail.ImapIdleChannelAdapter - waiting for mail 
2020-04-20 16:32:57,460 25199874 [scheduling-1] INFO  o.s.i.mail.ImapMailReceiver - attempting to receive mail from folder [INBOX] 
2020-04-20 16:32:57,460 25199874 [scheduling-1] DEBUG o.s.i.mail.ImapMailReceiver - This email server does not support RECENT flag, but it does support USER flags which will be used to prevent duplicates during email fetch. This receiver instance uses flag: imapmail.libero.it_idle_adapter 
2020-04-20 16:32:57,476 25199890 [scheduling-1] DEBUG o.s.i.mail.ImapMailReceiver - found 0 new messages 
2020-04-20 16:32:57,476 25199890 [scheduling-1] DEBUG o.s.i.mail.ImapMailReceiver - Received 0 messages 
2020-04-20 16:32:57,476 25199890 [scheduling-1] DEBUG o.s.i.mail.ImapIdleChannelAdapter - received 0 mail messages 
2020-04-20 16:32:57,476 25199890 [scheduling-1] DEBUG o.s.i.mail.ImapIdleChannelAdapter - Task completed successfully. Re-scheduling it again right away.

但过了一段时间，它就停止了写作。我有一种感觉，它与Flag选项有关，但我不知道如何解决这个问题。

任何建议都非常受欢迎

谢谢

安吉洛

Answer 1

请在这里提出一个GH问题，https://github.com/spring-projects/spring-integration/issues。

作为一种变通方法，您可能需要遵循文档中建议的方法：https://docs.spring.io/spring-integration/docs/5.3.0.M4/reference/html/mail.html#mail-tx-sync。参见Mover。我的意思是，您需要考虑重新打开文件夹，以便能够处理邮件中的附件。