我有一个JavaMailSender
发送双重或三重消息的问题。
在控制器中:
while(size > 0) //# of emails I want to send, for example 5
{
Item item= itemRepository.findFirstBySentFalseAndValidTrue(); //getting only emails that are not sent!
item.getData(); // API call that adds some info to the item, takes between 5-15 seconds per item
if(item.isValid())
{
item.setHeaderName(dataService.setHeader(item.getStore(), LocaleContextHolder.getLocale()));
item.setAddress(dataService.getAddress(item.getStore(), LocaleContextHolder.getLocale()) + item.getId());
String email = dataService.getEmail(item.getStore());
String footer = dataService.getFooter(item.getStore(), LocaleContextHolder.getLocale());
if(!item.isSent()) //I check if sent here but still get double messages!
{
if(mailSenderService.sendEmail(item, "emails/templates/item", email, footer))
{
item.setSent(true);
}
}
itemRepository.save(item);
size--;
}
}
在我的电子邮件发送服务类中:
final MimeMessage mimeMessage = this.mailSender.createMimeMessage();
final MimeMessageHelper message = new MimeMessageHelper(mimeMessage,true, "UTF-8");
Context ctx = new Context(LocaleContextHolder.getLocale());
message.setFrom(email);
message.setTo("test@gmail.com");
ResourceBundle labels = ResourceBundle.getBundle("messages", LocaleContextHolder.getLocale());
mimeMessage.setHeader("Content-Type", encodingOptions);
mimeMessage.setSubject(labels.getString("email.itme.title"), "UTF-8");
ctx.setVariable("data", item);
ctx.setVariable("footer", footer);
try{
String processedTemplate = templateEngine.process(template, ctx);
mimeMessage.setContent(processedTemplate, encodingOptions);
this.mailSender.send(mimeMessage);
} catch(Exception e){
e.printStackTrace();
}
return true;
}
我只是假设这是我的电子邮件发送类中的一个问题,但也许 api 调用太慢以至于方法执行时间过长并发送重复消息?有时,当我只发送几封电子邮件(例如 3 封)时,这没问题,而且不会发送重复邮件。当我想发送 20 或 30 时,一切都需要大约 15 分钟,而且我得到了重复(我无法控制 API 的响应时间,有时它更快有时它超级慢)。有什么方法可以调试它并查看何时调用哪个方法以及为什么会得到这些重复项?
编辑:那是我的 itemRepository 实现:
@Repository
@Qualifier(value = "itemRepository")
@Transactional
public interface itemRepository extends CrudRepository<Item, Long> {
public Item save(Item item);
public Item findFirstBySentFalseAndValidTrue();
}