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[英]Send Custom Acknowledgement message to sender using jms:inbound-channel-adapter using spring integration
[英]Re downloading of message when using spring integration inbound channel adapter
一旦读取消息,我正在使用spring邮件入站通道适配器读取邮件,我正在相应通道的服务激活器中执行一些db操作。 我的要求是,如果任何数据库操作失败,适配器应再次读取相同的消息。
邮件配置:
@Bean
public DirectChannel inputChannel() {
return new DirectChannel();
}
@Bean
public IntegrationFlow pop3MailFlow() {
String url = "[url]";
return IntegrationFlows
.from(Mail.pop3InboundAdapter(url)
.javaMailProperties(p -> p.put("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory")),e -> e.autoStartup(true)
.poller(Pollers.fixedDelay(2000).transactionSynchronizationFactory(transactionSynchronizationFactory())))
.channel(inputChannel())
.handle(inboundEmailProcessor(),"messageProcess")
.get();
}
@Bean
public InboundEmailProcessor inboundEmailProcessor() {
return new InboundEmailProcessor();
}
@Bean
public TransactionSynchronizationFactory transactionSynchronizationFactory() {
TransactionSynchronizationFactory synchronizationFactory = new DefaultTransactionSynchronizationFactory(expressionEvaluatingTransactionSynchronizationProcessor());
return synchronizationFactory;
}
@Bean
public ExpressionEvaluatingTransactionSynchronizationProcessor expressionEvaluatingTransactionSynchronizationProcessor() {
ExpressionEvaluatingTransactionSynchronizationProcessor processor = new ExpressionEvaluatingTransactionSynchronizationProcessor();
ExpressionParser parser = new SpelExpressionParser();
processor.setAfterRollbackExpression(parser.parseExpression("new com.muraai.ex.config.Exp().process(payload)"));
return processor;
}
public class InboundEmailProcessor {
@Autowired
AttachmentsRepository attachmentsRepository;
@Transactional(rollbackFor = Exception.class)
public void messageProcess() {
// some db operations
// if it fails the same message should be read again
}
}
我以为这可以用,但是不能用。 有什么办法可以满足我的要求
public class Exp {
public void process(MimeMessage message) throws MessagingException {
message.setFlag(Flags.Flag.SEEN, false);
}
}
为此,您需要IMAP; 对于POP3,服务器始终将其标记为已读。
您可以将弹簧重试拦截器建议添加到轮询器的建议链和/或将失败的消息发送到错误通道。
可以为重试次数,退避策略等配置重试建议。
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