com.onestop.common.sentinel.handler.OsBlockHandler Maven / Gradle / Ivy
/*
*
* * Copyright (c) 2021 os-parent Authors. All Rights Reserved.
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
*
*/
package com.onestop.common.sentinel.handler;
import cn.hutool.http.ContentType;
import cn.hutool.json.JSONUtil;
import com.alibaba.csp.sentinel.adapter.spring.webmvc.callback.BlockExceptionHandler;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeException;
import com.alibaba.csp.sentinel.slots.block.flow.FlowException;
import com.onestop.common.core.util.Res;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* sentinel统一降级限流策略
*
* {@link com.alibaba.csp.sentinel.adapter.spring.webmvc.callback.DefaultBlockExceptionHandler}
*
* @author Clark
* @version 2021-07-19
*/
@Slf4j
public class OsBlockHandler implements BlockExceptionHandler {
@Override
public void handle(HttpServletRequest request, HttpServletResponse response, BlockException e) throws Exception {
log.error("sentinel降级 资源名称{}", e.getRule().getResource(), e);
response.setContentType(ContentType.JSON.toString());
//服务限流
if (e instanceof FlowException) {
log.error("-------服务限流，请稍后再试--------");
Res res = Res.failed(HttpStatus.TOO_MANY_REQUESTS.value(), HttpStatus.TOO_MANY_REQUESTS.getReasonPhrase());
response.setStatus(HttpStatus.TOO_MANY_REQUESTS.value());
response.getWriter().print(JSONUtil.toJsonStr(res));
}
//服务降级
else if (e instanceof DegradeException) {
log.error("-------服务降级，请稍后再试--------");
Res res = Res.failed(HttpStatus.SERVICE_UNAVAILABLE.value(), HttpStatus.SERVICE_UNAVAILABLE.getReasonPhrase());
response.setStatus(HttpStatus.SERVICE_UNAVAILABLE.value());
response.getWriter().print(JSONUtil.toJsonStr(res));
} else {
log.error("-------OsBlockHandler 未知--------" + e);
}
}
}