Add Smoke Tests asserting the proper behavior of a properly configured Spring ApplicationContext in the case of forced-disconnect / auto-reconnect events in a GemFire/Geode DistributedSystem (cluster).

spring-geode-tests/smoke-tests/peer-cache-application/spring-geode-smoke-tests-peer-cache-application.gradle

@@ -0,0 +1,19 @@
+apply plugin: 'io.spring.convention.spring-test'
+
+description = "Smoke Tests asserting the proper function of a Spring Boot configured and bootstrapped Apache Geode peer Cache application in a simulated forced-disconnect/auto-reconnect scenairo."
+
+dependencies {
+
+	implementation "org.assertj:assertj-core"
+
+	implementation project(":apache-geode-extensions")
+	implementation project(':spring-geode-starter')
+//	implementation project(':spring-geode-starter-logging')
+
+	testImplementation('org.springframework.boot:spring-boot-starter-test') {
+		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+	}
+
+	testImplementation project(":spring-geode-starter-test")
+
+}

spring-geode-tests/smoke-tests/peer-cache-application/src/main/java/example/app/geode/cache/peer/SpringBootApacheGeodePeerCacheApplication.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2020 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 example.app.geode.cache.peer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.apache.geode.ForcedDisconnectException;
+import org.apache.geode.cache.Cache;
+import org.apache.geode.cache.client.ClientCache;
+import org.apache.geode.distributed.DistributedSystem;
+
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.gemfire.config.annotation.PeerCacheApplication;
+import org.springframework.geode.distributed.event.ApplicationContextMembershipListener;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A Spring Boot, Apache Geode {@literal peer} {@link Cache} application configured and bootstrapped with the SBDG
+ * framework, thereby overriding the convention of creating a {@link ClientCache} instance by default.
+ *
+ * Additionally, this example class further explores how the Spring Boot configured and bootstrapped Apache Geode
+ * {@link PeerCacheApplication} might be self-aware that it is a peer member of a {@link DistributedSystem} (cluster),
+ * handling a possible {@link ForcedDisconnectException} and subsequent auto-reconnect, along with
+ * cluster configuration.
+ *
+ * This code and associated Smoke Tests is purely experimental/exploratory.
+ *
+ * @author John Blum
+ * @see org.apache.geode.cache.Cache
+ * @see org.apache.geode.distributed.DistributedSystem
+ * @see org.springframework.boot.SpringApplication
+ * @see org.springframework.boot.autoconfigure.SpringBootApplication
+ * @see org.springframework.boot.builder.SpringApplicationBuilder
+ * @see org.springframework.context.ConfigurableApplicationContext
+ * @see org.springframework.context.annotation.Bean
+ * @see org.springframework.data.gemfire.config.annotation.PeerCacheApplication
+ * @since 1.3.0
+ */
+@SpringBootApplication
+@SuppressWarnings("unused")
+public class SpringBootApacheGeodePeerCacheApplication {
+
+	public static void main(String[] args) {
+
+		new SpringApplicationBuilder(SpringBootApacheGeodePeerCacheApplication.class)
+			//.contextClass(AnnotationConfigWebApplicationContext.class)
+			//.web(WebApplicationType.SERVLET)
+			.build()
+			.run(args);
+	}
+
+	private final Logger logger = LoggerFactory.getLogger(getClass());
+
+	@Bean
+	public ApplicationRunner peerCacheAssertRunner(Cache peerCache) {
+
+		return args -> {
+
+			assertThat(peerCache).isNotNull();
+			assertThat(peerCache.getName()).isEqualTo(SpringBootApacheGeodePeerCacheApplication.class.getSimpleName());
+			assertThat(peerCache.getDistributedSystem()).isNotNull();
+			assertThat(peerCache.getDistributedSystem().getProperties()).isNotNull();
+			assertThat(peerCache.getDistributedSystem().getProperties().getProperty("disable-auto-reconnect"))
+				.isEqualTo("false");
+			assertThat(peerCache.getDistributedSystem().getProperties().getProperty("use-cluster-configuration"))
+				.isEqualTo("true");
+
+			this.logger.info("Peer Cache [{}] configured and bootstrapped successfully!", peerCache.getName());
+			//System.err.printf("Peer Cache [%s] configured and bootstrapped successfully!%n", peerCache.getName());
+		};
+	}
+
+	@PeerCacheApplication(name = "SpringBootApacheGeodePeerCacheApplication",
+		enableAutoReconnect = true, useClusterConfiguration = true)
+	static class GeodeConfiguration {
+
+		@Bean
+		ApplicationContextMembershipListener applicationContextMembershipListener(
+				ConfigurableApplicationContext applicationContext, Cache peerCache) {
+
+			return new ApplicationContextMembershipListener(applicationContext).register(peerCache);
+		}
+	}
+}

spring-geode-tests/smoke-tests/peer-cache-application/src/test/java/example/app/geode/cache/peer/SpringBootApacheGeodePeerCacheApplicationUnitTests.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2020 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 example.app.geode.cache.peer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.apache.geode.cache.Cache;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.support.AbstractRefreshableApplicationContext;
+import org.springframework.data.gemfire.tests.mock.annotation.EnableGemFireMockObjects;
+import org.springframework.geode.distributed.event.ApplicationContextMembershipListener;
+import org.springframework.geode.distributed.event.MembershipListenerAdapter;
+import org.springframework.geode.distributed.event.support.MemberDepartedEvent;
+import org.springframework.geode.distributed.event.support.MemberJoinedEvent;
+import org.springframework.geode.test.context.TestRefreshableApplicationContextLoader;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+/**
+ * Unit Tests for {@link SpringBootApacheGeodePeerCacheApplication}.
+ *
+ * @author John Blum
+ * @see org.junit.Test
+ * @see org.apache.geode.cache.Cache
+ * @see org.springframework.context.ConfigurableApplicationContext
+ * @see org.springframework.context.support.AbstractRefreshableApplicationContext
+ * @see org.springframework.data.gemfire.tests.mock.annotation.EnableGemFireMockObjects
+ * @see org.springframework.geode.test.context.TestRefreshableApplicationContextLoader
+ * @see org.springframework.test.context.ContextConfiguration
+ * @see org.springframework.test.context.junit4.SpringRunner
+ * @since 1.3.0
+ */
+@RunWith(SpringRunner.class)
+@EnableGemFireMockObjects
+@ContextConfiguration(
+	classes = SpringBootApacheGeodePeerCacheApplication.class,
+	loader = TestRefreshableApplicationContextLoader.class
+)
+@SuppressWarnings({ "unused" })
+public class SpringBootApacheGeodePeerCacheApplicationUnitTests {
+
+	@Autowired
+	private ConfigurableApplicationContext applicationContext;
+
+	@Autowired
+	@Qualifier("applicationContextMembershipListener")
+	private MembershipListenerAdapter<ApplicationContextMembershipListener> membershipListener;
+
+	@Before
+	public void setup() {
+
+		//System.err.printf("ApplicationContext Type [%s]%n", ObjectUtils.nullSafeClassName(this.applicationContext));
+
+		assertThat(this.applicationContext).isInstanceOf(AbstractRefreshableApplicationContext.class);
+	}
+
+	@Test
+	public void memberFartedAndDepartedThenJoinedAndWasPurloined() {
+
+		MemberDepartedEvent mockMemberDepartedEvent = mock(MemberDepartedEvent.class);
+		MemberJoinedEvent mockMemberJoinedEvent = mock(MemberJoinedEvent.class);
+
+		Cache peerCache = this.applicationContext.getBean(Cache.class);
+
+		assertThat(peerCache).isNotNull();
+
+		this.membershipListener.handleMemberDeparted(mockMemberDepartedEvent);
+
+		assertThat(this.applicationContext.isActive()).isFalse();
+		assertThat(this.applicationContext.isRunning()).isFalse();
+
+		this.membershipListener.handleMemberJoined(mockMemberJoinedEvent);
+
+		assertThat(this.applicationContext.isActive()).isTrue();
+		assertThat(this.applicationContext.isRunning()).isTrue();
+
+		Cache reconnectedPeerCache = this.applicationContext.getBean(Cache.class);
+
+		assertThat(reconnectedPeerCache).isNotNull();
+		assertThat(reconnectedPeerCache).isNotSameAs(peerCache);
+	}
+}