其他系统工具使用

# 其他系统工具使用

# 发邮件

snapper-email包提供了邮件发送功能，一段发送邮件的代码片段为

SmtpServer smtpServer = MailServer.create()
  .host((Checker.BeEmpty(bo.getProtocol()) ? SMTP_PREFIX : bo.getProtocol() + Strings.DOT) + bo.getHost())
  .auth(bo.getAddress(), bo.getPasswd())
  .ssl(true)
  .buildSmtpMailServer();
if (Checker.BeNotEmpty(attchments)) {
  for (File file : attchments) {
      if (file.length() > SystemConsts.MAX_MAIL_FILE_SIZE) {
          throw new ServerRuntimeException(ExceptionEnum.EMAIL_ATTCHMENT_SIZE_TOO_LARGE, SystemConsts.MAX_MAIL_FILE_SIZE / (1024 * 1024));
      }
      mail.embeddedAttachment(EmailAttachment.with().content(file));
  }
}
//发送邮件
MailThreadPool pool = new MailThreadPool();

pool.newMailSenderThread(smtpServer, mail, new EmailSenderListener() {
    @Override
    public void onException(Email mail, String filePath, MailException exception) {
        log.error("email attchments send fail, subject is {}, from is {}, exception is {}", mail.subject(), mail.from(), exception.getMessage());
    }

    @Override
    public void onComplete(Email mail, String filePath) {
        log.info("Email has sended....");
    }
});

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# http请求调用

snapper-http包提供了http请求调用功能，请求调用的代码片段为

String result = IHttpClient.create().buildGet().sendXRaw(url, buildHeader());

# fastdfs 文件上传

snapper-oss-starter封装了fastdfs文件的上传、删除等操作，上传的代码片段为

@Autowired private DFSUpLoader dfsUploader;

public UploadResultWrap uploadFile(MultipartFile file) throws IOException {
  UploadResultWrap result = new UploadResultWrap();
  if (Checker.BeNull(file)) {
    throw new ServerRuntimeException(ExceptionEnum.FILE_NOT_EXIST);
  }
  dfsUploader.upload(file.getOriginalFilename(), file.getInputStream(), new FileUploadListener() {

    @Override
    public void operationProgresse(long current, long total) {

    }

    @Override
    public void operationException(DFSUploadException ex) {

    }

    @Override
    public void operationComplete(StoredDFSFile dfsFile) {
      result.setGroupName(dfsFile.getGroup()).setRemotePath(dfsFile.getPath()).setExtName(dfsFile.getExtName()).setUid(SnowflakeIdWorker.getId()).setName(dfsFile.getFileName()).setStatus("done").setUrl(dfsFile.getReadUrl());

    }
  });
  return result;
}

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# disruptor 生产者消费者

snapper-core-starter提供了基于disruptor的生产者消费者模式，代码片段为

List<ObjectEvent<String>> events = Lists.newArrayList("xxx1","yyy2");
List<EventDisruptorConsumer<String>> consumers = Lists.newArrayList();
consumers.add(new EventDisruptorConsumer<String>() {
  @Override
  public void consume(String t) {
          //your handle logic
  }
});
//发布事件
EventDisruptorQueueFactory.publishSubscribeEvent(events, consumers.toArray(new EventDisruptorConsumer[0]));

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← 状态流使用