text: /*
   * Copyright 2012-2019 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 org.springframework.boot.actuate.context;
  
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.util.Map;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.jupiter.api.Test;
  
  import org.springframework.boot.WebApplicationType;
  import org.springframework.boot.builder.SpringApplicationBuilder;
  import org.springframework.boot.test.context.runner.ApplicationContextRunner;
  import org.springframework.context.ApplicationListener;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.context.event.ContextClosedEvent;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  /**
   * Tests for {@link ShutdownEndpoint}.
   *
   * @author Phillip Webb
   * @author Dave Syer
   * @author Andy Wilkinson
   */
  class ShutdownEndpointTests {
  
  	@Test
  	void shutdown() {
  		ApplicationContextRunner contextRunner = new ApplicationContextRunner()
  				.withUserConfiguration(EndpointConfig.class);
  		contextRunner.run((context) -> {
  			EndpointConfig config = context.getBean(EndpointConfig.class);
  			ClassLoader previousTccl = Thread.currentThread().getContextClassLoader();
  			Map<String, String> result;
  			Thread.currentThread().setContextClassLoader(new URLClassLoader(new URL[0], getClass().getClassLoader()));
  			try {
  				result = context.getBean(ShutdownEndpoint.class).shutdown();
  			}
  			finally {
  				Thread.currentThread().setContextClassLoader(previousTccl);
  			}
  			assertThat(result.get("message")).startsWith("Shutting down");
  			assertThat(((ConfigurableApplicationContext) context).isActive()).isTrue();
  			assertThat(config.latch.await(10, TimeUnit.SECONDS)).isTrue();
  			assertThat(config.threadContextClassLoader).isEqualTo(getClass().getClassLoader());
  		});
  	}
  
  	@Test
  	void shutdownChild() throws Exception {
  		ConfigurableApplicationContext context = new SpringApplicationBuilder(EmptyConfig.class)
  				.child(EndpointConfig.class).web(WebApplicationType.NONE).run();
  		CountDownLatch latch = context.getBean(EndpointConfig.class).latch;
  		assertThat(context.getBean(ShutdownEndpoint.class).shutdown().get("message")).startsWith("Shutting down");
  		assertThat(context.isActive()).isTrue();
  		assertThat(latch.await(10, TimeUnit.SECONDS)).isTrue();
  	}
  
  	@Test
  	void shutdownParent() throws Exception {
  		ConfigurableApplicationContext context = new SpringApplicationBuilder(EndpointConfig.class)
  				.child(EmptyConfig.class).web(WebApplicationType.NONE).run();
  		CountDownLatch parentLatch = context.getBean(EndpointConfig.class).latch;
  		CountDownLatch childLatch = context.getBean(EmptyConfig.class).latch;
  		assertThat(context.getBean(ShutdownEndpoint.class).shutdown().get("message")).startsWith("Shutting down");
  		assertThat(context.isActive()).isTrue();
  		assertThat(parentLatch.await(10, TimeUnit.SECONDS)).isTrue();
  		assertThat(childLatch.await(10, TimeUnit.SECONDS)).isTrue();
  	}
  
  	@Configuration(proxyBeanMethods = false)
  	static class EndpointConfig {
  
  		private final CountDownLatch latch = new CountDownLatch(1);
  
  		private volatile ClassLoader threadContextClassLoader;
  
  		@Bean
  		ShutdownEndpoint endpoint() {
  			return new ShutdownEndpoint();
  		}
  
  		@Bean
  		ApplicationListener<ContextClosedEvent> listener() {
  			return (event) -> {
  				EndpointConfig.this.threadContextClassLoader = Thread.currentThread().getContextClassLoader();
  				EndpointConfig.this.latch.countDown();
  			};
  		}
  
  	}
  
  	@Configuration(proxyBeanMethods = false)
  	static class EmptyConfig {
  
  		private final CountDownLatch latch = new CountDownLatch(1);
  
  		@Bean
  		ApplicationListener<ContextClosedEvent> listener() {
  			return (event) -> EmptyConfig.this.latch.countDown();
  		}
  
  	}
  
  }
  