使用Sentinel自定义返回和实现区分来源方式_Java

sentinel自定义返回和实现区分来源

1. 自定义错误返回

因为流控和降级页面报的异常都是相同的，所以可以优化一下。

使用官方的接口blockexceptionhandler（2.2.7.release）、urlblockhandler（0.9.0.release）

定义处理类：

@component
public class myurlblockhandler implements blockexceptionhandler {

    @override
    public void handle(httpservletrequest httpservletrequest, httpservletresponse response, blockexception ex) throws exception {
        errormsg msg = null;
        if (ex instanceof flowexception) {
            msg = errormsg.builder()
                    .status(100)
                    .msg("限流了")
                    .build();
        } else if (ex instanceof degradeexception) {
            msg = errormsg.builder()
                    .status(101)
                    .msg("降级了")
                    .build();
        } else if (ex instanceof paramflowexception) {
            msg = errormsg.builder()
                    .status(102)
                    .msg("热点参数限流")
                    .build();
        } else if (ex instanceof systemblockexception) {
            msg = errormsg.builder()
                    .status(103)
                    .msg("系统规则（负载/...不满足要求）")
                    .build();
        } else if (ex instanceof authorityexception) {
            msg = errormsg.builder()
                    .status(104)
                    .msg("授权规则不通过")
                    .build();
        }
        // http状态码
        response.setstatus(500);
        response.setcharacterencoding("utf-8");
        response.setheader("content-type", "application/json;charset=utf-8");
        response.setcontenttype("application/json;charset=utf-8");
        // spring mvc自带的json操作工具，叫jackson
        new objectmapper()
                .writevalue(
                        response.getwriter(),
                        msg
                );
    }
}

@data
@builder
@allargsconstructor
@noargsconstructor
class errormsg {
    private integer status;
    private string msg;
}

效果：

2. 实现区分来源

使用requestoriginparser接口

@component
public class myrequestoriginparser implements requestoriginparser {
    @override
    public string parseorigin(httpservletrequest request) {
        // 从请求参数中获取名为 origin 的参数并返回
        // 如果获取不到origin参数，那么就抛异常

        string origin = request.getparameter("origin");
        if (stringutils.isblank(origin)) {
            throw new illegalargumentexception("origin must be specified");
        }
        return origin;
    }
}

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