RestartIntegrationTests.java

/*
 * Copyright 2012-present 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.cloud.context.restart;

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import static org.assertj.core.api.BDDAssertions.then;

public class RestartIntegrationTests {

	private ConfigurableApplicationContext context;

	@AfterEach
	public void close() {
		if (this.context != null) {
			this.context.close();
		}
	}

	@Test
	public void testRestartTwice() {

		this.context = SpringApplication.run(TestConfiguration.class, "--management.endpoint.restart.enabled=true",
				"--server.port=0", "--spring.cloud.bootstrap.enabled=true",
				"--management.endpoints.web.exposure.include=restart", "--spring.liveBeansView.mbeanDomain=livebeans");

		RestartEndpoint endpoint = this.context.getBean(RestartEndpoint.class);
		then(this.context.getParent()).isNotNull();
		then(this.context.getParent().getParent()).isNull();
		this.context = endpoint.doRestart();

		then(this.context).isNotNull();
		then(this.context.getParent()).isNotNull();
		then(this.context.getParent().getParent()).isNull();

		RestartEndpoint next = this.context.getBean(RestartEndpoint.class);
		then(next).isSameAs(endpoint);
		this.context = next.doRestart();

		then(this.context).isNotNull();
		then(this.context.getParent()).isNotNull();
		then(this.context.getParent().getParent()).isNull();

		// FIXME: 4.0.0 missing LiveBeansView
		/*
		 * LiveBeansView beans = new LiveBeansView(); String json =
		 * beans.getSnapshotAsJson();
		 * then(json).containsOnlyOnce("parent\": \"bootstrap");
		 * then(json).containsOnlyOnce("parent\": null");
		 */
	}

	@Test
	public void testResumeAfterPause() {
		this.context = SpringApplication.run(PauseHandlerConfiguration.class,
				"--management.endpoint.restart.enabled=true", "--server.port=0",
				"--management.endpoints.web.exposure.include=restart,pause,resume");

		RestartEndpoint endpoint = this.context.getBean(RestartEndpoint.class);
		TestPauseHandler handler = this.context.getBean(TestPauseHandler.class);

		then(endpoint.getResumeEndpoint().resume()).isFalse();
		then(endpoint.getPauseEndpoint().pause()).isTrue();
		then(handler.paused).isTrue();
		then(endpoint.getResumeEndpoint().resume()).isTrue();
		then(handler.paused).isFalse();
		then(endpoint.getResumeEndpoint().resume()).isFalse();
	}

	@Test
	public void testRestartAfterPause() {
		this.context = SpringApplication.run(PauseHandlerConfiguration.class,
				"--management.endpoint.restart.enabled=true", "--server.port=0",
				"--management.endpoints.web.exposure.include=restart,pause,resume");

		RestartEndpoint endpoint = this.context.getBean(RestartEndpoint.class);
		TestPauseHandler closed = this.context.getBean(TestPauseHandler.class);

		then(endpoint.getPauseEndpoint().pause()).isTrue();
		this.context = endpoint.doRestart();
		TestPauseHandler handler = this.context.getBean(TestPauseHandler.class);
		then(handler).isNotSameAs(closed);

		then(endpoint.getResumeEndpoint().resume()).isFalse();
		then(endpoint.getPauseEndpoint().pause()).isTrue();
		then(handler.paused).isTrue();
		then(endpoint.getResumeEndpoint().resume()).isTrue();
		then(handler.paused).isFalse();
	}

	@Test
	public void testResumeWithoutPauseHandlers() {
		RestartEndpoint endpoint = new RestartEndpoint();
		endpoint.doPause();
		then(endpoint.getResumeEndpoint().resume()).isFalse();
	}

	@Configuration(proxyBeanMethods = false)
	@EnableAutoConfiguration
	protected static class TestConfiguration {

	}

	@Configuration(proxyBeanMethods = false)
	@EnableAutoConfiguration
	protected static class PauseHandlerConfiguration {

		@Bean
		TestPauseHandler testPauseHandler() {
			return new TestPauseHandler();
		}

	}

	static class TestPauseHandler implements PauseHandler {

		boolean paused;

		@Override
		public void pause() {
			this.paused = true;
		}

		@Override
		public void resume() {
			this.paused = false;
		}

	}

}