content: /*
   * Copyright 2013-2023 the original author or authors.
   *
   * 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
   *
   *      https://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.alibaba.cloud.examples;
  
  import java.util.Collections;
  
  import com.alibaba.cloud.circuitbreaker.sentinel.ReactiveSentinelCircuitBreakerFactory;
  import com.alibaba.cloud.circuitbreaker.sentinel.SentinelConfigBuilder;
  import com.alibaba.csp.sentinel.adapter.spring.webflux.callback.BlockRequestHandler;
  import com.alibaba.csp.sentinel.slots.block.RuleConstant;
  import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule;
  import reactor.core.publisher.Mono;
  
  import org.springframework.cloud.client.circuitbreaker.Customizer;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.http.HttpStatus;
  import org.springframework.http.MediaType;
  import org.springframework.web.reactive.function.server.ServerResponse;
  import org.springframework.web.server.ServerWebExchange;
  
  import static org.springframework.web.reactive.function.BodyInserters.fromValue;
  
  /**
   * @author <a href="mailto:fangjian0423@gmail.com">Jim</a>
   */
  @Configuration
  public class MyConfiguration {
  
  	@Bean
  	public BlockRequestHandler blockRequestHandler() {
  		return new BlockRequestHandler() {
  			@Override
  			public Mono<ServerResponse> handleRequest(ServerWebExchange exchange,
  					Throwable t) {
  				return ServerResponse.status(HttpStatus.TOO_MANY_REQUESTS)
  						.contentType(MediaType.APPLICATION_JSON).body(fromValue("block"));
  			}
  		};
  	}
  
  	@Bean
  	public Customizer<ReactiveSentinelCircuitBreakerFactory> slowCustomizer() {
  		return factory -> {
  			factory.configure(builder -> builder.rules(Collections.singletonList(
  					new DegradeRule("slow_mono").setGrade(RuleConstant.DEGRADE_GRADE_RT)
  							.setCount(100).setTimeWindow(5))),
  					"slow_mono");
  			factory.configure(builder -> builder.rules(Collections.singletonList(
  					new DegradeRule("slow_flux").setGrade(RuleConstant.DEGRADE_GRADE_RT)
  							.setCount(100).setTimeWindow(5))),
  					"slow_flux");
  			factory.configureDefault(id -> new SentinelConfigBuilder().resourceName(id)
  					.rules(Collections.singletonList(new DegradeRule(id)
  							.setGrade(RuleConstant.DEGRADE_GRADE_EXCEPTION_COUNT)
  							.setCount(0.5).setTimeWindow(10)))
  					.build());
  		};
  	}
  
  }
  