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.circuitbreaker.sentinel;
  
  import java.time.Duration;
  import java.util.Collections;
  
  import com.alibaba.csp.sentinel.slots.block.RuleConstant;
  import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import reactor.core.publisher.Flux;
  import reactor.core.publisher.Mono;
  import reactor.test.StepVerifier;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.boot.test.web.server.LocalServerPort;
  import org.springframework.cloud.client.circuitbreaker.Customizer;
  import org.springframework.cloud.client.circuitbreaker.ReactiveCircuitBreakerFactory;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.core.ParameterizedTypeReference;
  import org.springframework.stereotype.Service;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RestController;
  import org.springframework.web.reactive.function.client.WebClient;
  
  import static com.alibaba.cloud.circuitbreaker.sentinel.ReactiveSentinelCircuitBreakerIntegrationTest.Application;
  import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
  
  /**
   * @author Ryan Baxter
   */
  @SpringBootTest(webEnvironment = RANDOM_PORT, classes = Application.class, properties = {
  		"spring.cloud.discovery.client.health-indicator.enabled=false" })
  public class ReactiveSentinelCircuitBreakerIntegrationTest {
  
  	@LocalServerPort
  	private int port = 0;
  
  	@Autowired
  	private Application.DemoControllerService service;
  
  	@BeforeEach
  	public void setup() {
  		service.setPort(port);
  	}
  
  	@Test
  	public void test() throws Exception {
  		StepVerifier.create(service.normal()).expectNext("normal").verifyComplete();
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  
  		// Then in the next 5s, the fallback method should be called.
  		for (int i = 0; i < 5; i++) {
  			StepVerifier.create(service.slow()).expectNext("fallback").verifyComplete();
  			Thread.sleep(900);
  		}
  		Thread.sleep(500);
  
  		// Half-open recovery (will re-open the circuit breaker).
  		StepVerifier.create(service.slow()).expectNext("slow").verifyComplete();
  
  		StepVerifier.create(service.normalFlux()).expectNext("normalflux")
  				.verifyComplete();
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  		// Then in the next 5s, the fallback method should be called.
  		for (int i = 0; i < 5; i++) {
  			StepVerifier.create(service.slowFlux()).expectNext("flux_fallback")
  					.verifyComplete();
  			Thread.sleep(900);
  		}
  		Thread.sleep(500);
  
  		// Half-open recovery (will re-open the circuit breaker).
  		StepVerifier.create(service.slowFlux()).expectNext("slowflux").verifyComplete();
  	}
  
  	@Configuration
  	@EnableAutoConfiguration
  	@RestController
  	protected static class Application {
  
  		@GetMapping("/slow")
  		public Mono<String> slow() {
  			return Mono.just("slow").delayElement(Duration.ofMillis(80));
  		}
  
  		@GetMapping("/normal")
  		public Mono<String> normal() {
  			return Mono.just("normal");
  		}
  
  		@GetMapping("/slow_flux")
  		public Flux<String> slowFlux() {
  			return Flux.just("slow", "flux").delayElements(Duration.ofMillis(80));
  		}
  
  		@GetMapping("normal_flux")
  		public Flux<String> normalFlux() {
  			return Flux.just("normal", "flux");
  		}
  
  		@Bean
  		public Customizer<ReactiveSentinelCircuitBreakerFactory> slowCustomizer() {
  			return factory -> {
  				factory.configure(
  						builder -> builder.rules(Collections
  								.singletonList(new DegradeRule("slow_mono").setCount(50)
  										.setSlowRatioThreshold(0.7).setMinRequestAmount(5)
  										.setStatIntervalMs(30000).setTimeWindow(5))),
  						"slow_mono");
  				factory.configure(
  						builder -> builder.rules(Collections
  								.singletonList(new DegradeRule("slow_mono").setCount(50)
  										.setSlowRatioThreshold(0.7).setMinRequestAmount(5)
  										.setStatIntervalMs(30000).setTimeWindow(5))),
  						"slow_flux");
  				factory.configureDefault(id -> new SentinelConfigBuilder()
  						.resourceName(id)
  						.rules(Collections.singletonList(new DegradeRule(id)
  								.setGrade(RuleConstant.DEGRADE_GRADE_EXCEPTION_COUNT)
  								.setCount(5).setTimeWindow(10)))
  						.build());
  			};
  		}
  
  		@Service
  		public static class DemoControllerService {
  
  			private int port = 0;
  
  			private ReactiveCircuitBreakerFactory cbFactory;
  
  			DemoControllerService(ReactiveCircuitBreakerFactory cbFactory) {
  				this.cbFactory = cbFactory;
  			}
  
  			public Mono<String> slow() {
  				return WebClient.builder().baseUrl("http://localhost:" + port).build()
  						.get().uri("/slow").retrieve().bodyToMono(String.class)
  						.transform(it -> cbFactory.create("slow_mono").run(it, t -> {
  							t.printStackTrace();
  							return Mono.just("fallback");
  						}));
  			}
  
  			public Mono<String> normal() {
  				return WebClient.builder().baseUrl("http://localhost:" + port).build()
  						.get().uri("/normal").retrieve().bodyToMono(String.class)
  						.transform(it -> cbFactory.create("normal_mono").run(it, t -> {
  							t.printStackTrace();
  							return Mono.just("fallback");
  						}));
  			}
  
  			public Flux<String> slowFlux() {
  				return WebClient.builder().baseUrl("http://localhost:" + port).build()
  						.get().uri("/slow_flux").retrieve()
  						.bodyToFlux(new ParameterizedTypeReference<String>() {
  						}).transform(it -> cbFactory.create("slow_flux").run(it, t -> {
  							t.printStackTrace();
  							return Flux.just("flux_fallback");
  						}));
  			}
  
  			public Flux<String> normalFlux() {
  				return WebClient.builder().baseUrl("http://localhost:" + port).build()
  						.get().uri("/normal_flux").retrieve().bodyToFlux(String.class)
  						.transform(it -> cbFactory.create("normal_flux").run(it, t -> {
  							t.printStackTrace();
  							return Flux.just("flux_fallback");
  						}));
  			}
  
  			public void setPort(int port) {
  				this.port = port;
  			}
  
  		}
  
  	}
  
  }
  