TDengine 资深研发深夜爆肝整理，又一篇技术干货出炉了！

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter</artifactId>
</dependency>


<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-autoconfigure</artifactId>
</dependency>

METHOD_NOT_ALLOWED=Http method is not supported!
INTERFACE_NOT_FOUND=Interface does not exist!
UNSUPPORTED_MEDIA_TYPE=Not supported MediaType!
ILLEGAL_REQUEST=Illegal request!
SERVICE_UNAVAILABLE=Server resources are unavailable!
SERVER_ERROR=Sorry, an internal server error occurred, please try again later.
INTERNAL_SERVER_ERROR=Internal Server Error.


field.validity.check.failed=Field validity check failed!
bill.account.not-found=bill account not found!
grant.role-group.failed=grant role to group failed!
grant.role-user.failed=grant role to user failed!
add.user-group.failed=add user to group failed!
del.user-group.failed=delete user from group failed!
create.org.failed=create organization failed!
cannot.visit.org=you cannot visit this organization!
wrong.value.parameter=wrong value for parameter!
role.not-found=role not found!
role.update.failed=update role failed!
role.delete.failed=can not delete role!
account.in.arrears=The account is in arrears. Please recharge and try again!

spring:
  messages:
    basename: i18n-base/messages,messages

public interface LocaleMessageProvider {


  String get(String msgCode, Object... args);


}

@Bean
public LocaleMessageProvider localeMessageProvider(MessageSource messageSource){
  return (msgCode, args) -> {
    Locale locale = LocaleContextHolder.getLocale();
    return messageSource.getMessage(msgCode,args,locale);
  };
}

BaseApiResponse.class
private LocaleMessageProvider messageProvider;


public String getmsg() {
  String localeMsg = msg;
  if (messageProvider != null){
    if (StringUtils.hasText(this.msgCode)){
      try {
        localeMsg = messageProvider.get(this.msgCode, getArgs());
      } catch (Exception e) {
        if (!StringUtils.hasText(localeMsg)){
          localeMsg = this.msgCode;
        }
      }
  if (!StringUtils.hasText(localeMsg)){
    localeMsg = StringUtils.hasText(this.msgCode) ? this.msgCode : localeMsg;
  }
  return  localeMsg;
}


public class ResponseAdvice implements ResponseBodyAdvice{
 @Override
 public Object beforeBodyWrite(Object body, @NotNull MethodParameter returnType,
    @NotNull MediaType selectedContentType, @NotNull Class selectedConverterType,
    @NotNull ServerHttpRequest request,
    @NotNull ServerHttpResponse response) {


  int code = ServiceInfoEnum.valueOf(key).getServiceCode() * 1000 + 200;
  if (body instanceof BaseApiResponse) {
    BaseApiResponse res = (BaseApiResponse) body;
    res.setMessageProvider(messageProvider);
 }
}
}

org.springframework.context.i18n.LocaleContextHolder.java


public static Locale getLocale() {
 return getLocale(getLocaleContext());
}


public static Locale getLocale(@Nullable LocaleContext localeContext) {
 if (localeContext != null) {
  Locale locale = localeContext.getLocale();
  if (locale != null) {
   return locale;
  }
 }
 return (defaultLocale != null ? defaultLocale : Locale.getDefault());
}

    java.util.Locale.java


    private static volatile Locale defaultLocale = initDefault();


    private static Locale initDefault() {
    String language, region, script, country, variant;
    Properties props = GetPropertyAction.privilegedGetProperties();
    language = props.getProperty("user.language", "en");
    ......//省略代码
}

RequestContextFilter.java


protected void doFilterInternal(
  HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
  throws ServletException, IOException {
 ServletRequestAttributes attributes = new ServletRequestAttributes(request, response);
 initContextHolders(request, attributes);
 ......//省略代码
}
private void initContextHolders(HttpServletRequest request, ServletRequestAttributes requestAttributes) {
 LocaleContextHolder.setLocale(request.getLocale(), this.threadContextInheritable);
 ......//省略代码
}

org.apache.catalina.connector.Request.java


public Locale getLocale() {
    if (!localesParsed) {
        parseLocales();
    }
    if (locales.size() > 0) {
        return locales.get(0);
    }
    return defaultLocale;
}


protected void parseLocales() {
    ......//省略代码
    TreeMap<Double, ArrayList<Locale>> locales = new TreeMap<>();
    Enumeration<String> values = getHeaders("accept-language");
    while (values.hasMoreElements()) {
        String value = values.nextElement();
        parseLocalesHeader(value, locales);
    }
    for (ArrayList<Locale> list : locales.values()) {
        for (Locale locale : list) {
            addLocale(locale);
        }
     }
}

{
    "code": 500,
    "message": "用户名或者密码错误，请重新输入。",
    "data":{}
}

if (pricePlan.getClusterNum() >= 0 && appNum >= pricePlan.getClusterNum()) {
  throw new CommonsException(HttpResponseStatus.PAYMENT_REQUIRED.code(),
  "price.plan.limit.instance.number",
      "instance number is over limit!");
}

#messages_en.properties
price.plan.limit.instance.number=instance number is over limit
#messages_zh_CN.properties
price.plan.limit.instance.number=实例数量超过限制