1、feign远程调用丢失头
解决:设置feign的求情拦截器
@Configuration
public class MyFeignConfig {
@Bean("requestInterceptor")
public RequestInterceptor requestInterceptor(){
RequestInterceptor requestInterceptor = requestTemplate -> {
//RequestContextHolder拿到刚进来的请求
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
if (requestAttributes!=null){
HttpServletRequest request = requestAttributes.getRequest();
if(request!=null){
//同步请求头数据,cookie
requestTemplate.header("Cookie",request.getHeader("Cookie"));
}
}
};
return requestInterceptor;
}
}
2、Feign异步情况丢失上下文问题
由于feigb请求拦截器为新的request设置请求头底层是使用ThreadLocal保存刚进来的请求,所以在异步情况下,其他线程并不能获取到主线程的ThreadLocal,所以也拿不到请求。
解决:先获取主线程的ThreadLocal保存的请求数据,再分别向其他线程中设置
//拿到主线程请求,放到各个异步任务中
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();//
CompletableFuture<Void> addrFuture = CompletableFuture.runAsync(() -> {
//设置到其他线程
RequestContextHolder.setRequestAttributes(requestAttributes);
//远程调用查地址
List<MemberReceiveAddressVo> address = memberFeignService.getAddress(memberVo.getId());
orderConfirmVo.setAddressVos(address);
}, threadPoolExecutor);