Add SpringBootExtensions class to customize and affect configuration and components created by Spring Boot.

spring-geode/src/main/java/org/springframework/geode/core/util/SpringBootExtensions.java

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+/*
+ * 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 org.springframework.geode.core.util;
+
+import java.util.Optional;
+
+import org.springframework.boot.logging.LoggingSystem;
+import org.springframework.boot.logging.LoggingSystemFactory;
+import org.springframework.lang.NonNull;
+import org.springframework.util.ClassUtils;
+
+/**
+ * Abstract base class used to perform actions on Spring Boot configuration and components.
+ *
+ * @author John Blum
+ * @see org.springframework.geode.core.util.SpringExtensions
+ * @since 2.0.0
+ */
+@SuppressWarnings("unused")
+public abstract class SpringBootExtensions extends SpringExtensions {
+
+	/**
+	 * Cleans up all resources allocated by the {@link LoggingSystem} loaded, configured and initialized by Spring Boot.
+	 *
+	 * @see #cleanUpLoggingSystem(ClassLoader)
+	 * @see java.lang.ClassLoader
+	 */
+	public static void cleanUpLoggingSystem() {
+		cleanUpLoggingSystem(ClassUtils.getDefaultClassLoader());
+	}
+
+	/**
+	 * Cleans up all resources allocated by the {@link LoggingSystem} loaded, configured and initialized by Spring Boot.
+	 *
+	 * @param classLoader Java {@link ClassLoader} used to resolve the Spring Boot {@link LoggingSystem}
+	 * representing the logging provider (e.g. Logback).
+	 * @see java.lang.ClassLoader
+	 */
+	public static void cleanUpLoggingSystem(@NonNull ClassLoader classLoader) {
+
+		Optional.ofNullable(LoggingSystemFactory.fromSpringFactories())
+			.map(loggingSystemFactory -> loggingSystemFactory.getLoggingSystem(classLoader))
+			.ifPresent(LoggingSystem::cleanUp);
+	}
+}