sentinel全局限流策略

/*
 * Copyright (c) 2020 pig4cloud 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.zy.platform.common.sentinel.handle;

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.authority.AuthorityException;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeException;
import com.alibaba.csp.sentinel.slots.block.flow.FlowException;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowException;
import com.alibaba.csp.sentinel.slots.system.SystemBlockException;
import com.zy.platform.common.core.web.ServerResponse;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author javachen
 * @description sentinel统一降级限流策略
 */
@Slf4j
public class CustomerUrlBlockHandler implements BlockExceptionHandler {

	@Override
	public void handle(HttpServletRequest request, HttpServletResponse response, BlockException e) throws Exception {
		String msg="";
		if(e instanceof FlowException){
			msg="限流了,请稍后再试";
		}
		else if(e instanceof DegradeException){
			msg="降级了,请稍后再试";
		}
		else if(e instanceof ParamFlowException){
			msg="热点参数限流,请稍后再试";
		}
		else if(e instanceof SystemBlockException){
			msg="系统规则(负载、、...)不满足规则";
		}
		else if(e instanceof AuthorityException){
			msg="授权规则不通过";
		}

		response.setContentType("application/json;charset=UTF-8");
		response.setStatus(500);
		response.getWriter().print(JSONUtil.toJsonStr(ServerResponse.createByErrorMessage(msg)));
	}

}

SentinelAutoConfiguration

/*
 * Copyright (c) 2020 pig4cloud 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.zy.platform.common.sentinel;

import com.alibaba.cloud.sentinel.feign.SentinelFeignAutoConfiguration;
import com.alibaba.csp.sentinel.adapter.spring.webmvc.callback.BlockExceptionHandler;
import com.zy.platform.common.sentinel.feign.PlatformSentinelFeign;
import com.zy.platform.common.sentinel.handle.CustomerUrlBlockHandler;
import feign.Feign;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

/**
 * @author javachen
 * @description sentinel 配置
 */
@Configuration(proxyBeanMethods = false)
@AutoConfigureBefore(SentinelFeignAutoConfiguration.class)
public class SentinelAutoConfiguration {
 
	@Bean
	@ConditionalOnMissingBean
	public BlockExceptionHandler blockExceptionHandler() {
		return new CustomerUrlBlockHandler();
	}

}

spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
    com.zy.platform.common.sentinel.SentinelAutoConfiguration