Question

我正在使用Spring Boot 2.2.4-RELEASE和Spring Integration 5.2.3，并且正在使用IntegrationFlow和DSL，因为我需要配置多个IMAP服务器。

所以我写了这段代码：

String flowId = MAIL_IN_FLOW_ID_PREFIX+cpd.getIndirizzoMail();
if( flowContext.getRegistrationById(flowId) != null ) {
    flowContext.remove(flowId);
}
ImapIdleChannelAdapterSpec imapIdleChannelAdapterSpec = Mail.imapIdleAdapter(connectionUrl.toString())
    .javaMailProperties(javaMailProperties)
    .shouldDeleteMessages(deleteMessages)
    .shouldMarkMessagesAsRead(markMessagesRead)
    .autoStartup(true)
    .autoCloseFolder(false)
    .id(confMailIn.getHost()+"_adapter")
    .selector(selectFunction);
IntegrationFlow flowIdle = IntegrationFlows.from(imapIdleChannelAdapterSpec)
    .handle(msgHandler)
    .get();
flowContext.registration(flowIdle).id(flowId).register();

msgHandler在哪里

@Component
public class MailMessageHandler implements MessageHandler {
    private static final Logger logger = LoggerFactory.getLogger(MailMessageHandler.class.getName());
    @Autowired
    private IConfigCasPostaleSvc ccps;
    @Autowired
    private IGestioneMailSvc gestioneMailSvc;
    @Override
    public void handleMessage(Message<?> message) throws MessagingException {
        MimeMessage mimeMessage = (MimeMessage) message.getPayload();
        if( logger.isDebugEnabled() ) {

            try {
                mimeMessage.getAllHeaders().asIterator().forEachRemaining(header->{
                    logger.debug("Header name {} header value {}", header.getName(), header.getValue());
                });
            } catch (javax.mail.MessagingException e) {
                logger.error("Errore nella lettura degli header", e);
            }
        }
        try {
            //Recupero i dati del messaggio
            MimeMessageParser parser = new MimeMessageParser(mimeMessage);
            parser = parser.parse();
            String mailId = mimeMessage.getMessageID();
            String oggettoMail = parser.getSubject();
            Date receivedDate = mimeMessage.getReceivedDate();
            List<DataSource> allegatiMail = parser.getAttachmentList();

            String corpoMail = parser.getHtmlContent();
            if( !StringUtils.hasText(corpoMail) ) {
                if( logger.isDebugEnabled() ) {
                    logger.debug("Nessun contenuto HTML nella mail; recupero il contenuto plain/text");
                }
                corpoMail = parser.getPlainContent();
            }
            MailInDto datiMail = new MailInDto();
            datiMail.setAllegatiMail(allegatiMail);
            datiMail.setIdMail(mailId);
            datiMail.setOggettoMail(oggettoMail);
            datiMail.setDataRicezioneMail(receivedDate);
            datiMail.setAllegatiMail(allegatiMail);
            datiMail.setCorpoMail(corpoMail);
            List<Address> destinatari = parser.getTo();
            for (Address to:destinatari) {

                String destinatario = to.toString();
                if( to instanceof InternetAddress ){
                    destinatario = ((InternetAddress)to).getAddress();
                }
                //Considero solo i destinatari che sono censiti nelle nostre tabelle
                Optional<ConfigurazioneCasellaPostaleDto> configurazioneCasellaPostale = ccps.getConfigurazioneCasellaPostale(destinatario);
                if( configurazioneCasellaPostale.isPresent() ) {
                    ConfigurazioneCasellaPostaleDto ccpd = configurazioneCasellaPostale.get();
                    //Indico l'UUID del documentale che contiene tutti i messaggi mail della casella postale
                    datiMail.setParentIdFolder(ccpd.getCasellaPostale().getIdFolderDocumentale());
                    //Posso salvare
                    datiMail.setIdCasellaPostale(ccpd.getCasellaPostale().getPk());
                    this.gestioneMailSvc.storeReceivedMail(datiMail, parser);
                }else {
                    if( logger.isDebugEnabled() ) {
                        logger.debug("Nessuna configurazione casella postale trovata per il destinatario {}", destinatario);
                    }
                }
            }
        }catch (Exception e) {

            throw new MessagingException("Errore nella gestione del messaggio "+message, e); 
        }
    }
}

通过设置.autoCloseFolder(false)，我可以在处理程序组件中处理MimeMessage，但是我有一些疑问。

在使用.autoCloseFolder(false)时，通过文档阅读：

当配置为false时，该文件夹不会在以下时间后自动关闭抓取。关闭目标应用程序是它的责任使用IntegrationMessageHeaderAccessor.CLOSEABLE_RESOURCE标头从此通道适配器产生的消息中获取。

我不知道该如何以及如何告诉框架关闭文件夹

有时我会收到错误文件夹关闭异常。我不明白原因
我不确定将单例组件用作msgHandler是否在做正确的事情。当然，我具有所有局部变量，并且总是向数据库查询，但是我想知道这是否是正确的方法

有人可以给我任何建议吗？

谢谢

天使

编辑-堆栈

这里有关闭的文件夹stacktrace

2020-02-11 18：40：01,688 206505 [task-scheduler-2]警告 o.s.i.mail.ImapIdleChannelAdapter-无法执行IDLE任务。将尝试在10000毫秒内重新提交。 java.lang.IllegalStateException：“空闲”任务失败。将重新提交。在 org.springframework.integration.mail.ImapIdleChannelAdapter $ IdleTask.run（ImapIdleChannelAdapter.java:295）在 org.springframework.integration.mail.ImapIdleChannelAdapter $ ReceivingTask.run（ImapIdleChannelAdapter.java:249）在 org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run（DelegatingErrorHandlingRunnable.java:54）在 org.springframework.scheduling.concurrent.ReschedulingRunnable.run（ReschedulingRunnable.java:93）在 java.base / java.util.concurrent.Executors $ RunnableAdapter.call（Executors.java:515）在 java.base / java.util.concurrent.FutureTask.run $$$ capture（FutureTask.java:264）在java.base / java.util.concurrent.FutureTask.run（FutureTask.java）处 java.base / java.util.concurrent.ScheduledThreadPoolExecutor $ ScheduledFutureTask.run（ScheduledThreadPoolExecutor.java:304）在 java.base / java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1128）在 java.base / java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:628）在java.base / java.lang.Thread.run（Thread.java:830）造成原因： javax.mail.MessagingException：文件夹在以下位置关闭 org.springframework.integration.mail.ImapMailReceiver.searchForNewMessages（ImapMailReceiver.java:226）在 org.springframework.integration.mail.ImapMailReceiver.waitForNewMessages（ImapMailReceiver.java:189）在 org.springframework.integration.mail.ImapIdleChannelAdapter $ IdleTask.run（ImapIdleChannelAdapter.java:277） ...省略了10个常见框架

Answer 1

我认为您在调用flowContext.remove(flowId);时会遇到“文件夹封闭异常”，但是您的MailMessageHandler中还有一些尝试读取MimeMessage的过程。

要手动关闭文件夹，您需要访问StaticMessageHeaderAccessor.getCloseableResource(message)并调用其close()。

春季集成-imap邮件接收器

1 个答案: