Log condition evaluation report during AOT processing

Closes gh-32109

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/logging/ConditionEvaluationReportLoggingProcessor.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2012-2022 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.autoconfigure.logging;
+
+import org.springframework.beans.factory.aot.BeanFactoryInitializationAotContribution;
+import org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport;
+import org.springframework.boot.logging.LogLevel;
+
+/**
+ * {@link BeanFactoryInitializationAotProcessor} that logs the
+ * {@link ConditionEvaluationReport} during ahead-of-time processing.
+ *
+ * @author Andy Wilkinson
+ */
+class ConditionEvaluationReportLoggingProcessor implements BeanFactoryInitializationAotProcessor {
+
+	@Override
+	public BeanFactoryInitializationAotContribution processAheadOfTime(ConfigurableListableBeanFactory beanFactory) {
+		logConditionEvaluationReport(beanFactory);
+		return null;
+	}
+
+	private void logConditionEvaluationReport(ConfigurableListableBeanFactory beanFactory) {
+		new ConditionEvaluationReportLogger(LogLevel.DEBUG, () -> ConditionEvaluationReport.get(beanFactory))
+				.logReport(false);
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/spring/aot.factories

@@ -1,2 +1,5 @@
 org.springframework.aot.hint.RuntimeHintsRegistrar=\
 org.springframework.boot.autoconfigure.template.TemplateRuntimeHints
+
+org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor=\
+org.springframework.boot.autoconfigure.logging.ConditionEvaluationReportLoggingProcessor

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/logging/ConditionEvaluationReportLoggingProcessorTests.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2012-2022 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.autoconfigure.logging;
+
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.classic.LoggerContext;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport;
+import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
+import org.springframework.boot.test.system.CapturedOutput;
+import org.springframework.boot.test.system.OutputCaptureExtension;
+import org.springframework.context.annotation.Condition;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link ConditionEvaluationReportLoggingProcessor}.
+ *
+ * @author Andy Wilkinson
+ */
+@ExtendWith(OutputCaptureExtension.class)
+class ConditionEvaluationReportLoggingProcessorTests {
+
+	@Test
+	void logsDebugOnProcessAheadOfTime(CapturedOutput output) {
+		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
+		ConditionEvaluationReport.get(beanFactory).recordConditionEvaluation("test", mock(Condition.class),
+				ConditionOutcome.match());
+		ConditionEvaluationReportLoggingProcessor processor = new ConditionEvaluationReportLoggingProcessor();
+		processor.processAheadOfTime(beanFactory);
+		assertThat(output).doesNotContain("CONDITIONS EVALUATION REPORT");
+		withDebugLogging(() -> processor.processAheadOfTime(beanFactory));
+		assertThat(output).contains("CONDITIONS EVALUATION REPORT");
+	}
+
+	private void withDebugLogging(Runnable runnable) {
+		Logger logger = ((LoggerContext) LoggerFactory.getILoggerFactory())
+				.getLogger(ConditionEvaluationReportLogger.class);
+		Level currentLevel = logger.getLevel();
+		logger.setLevel(Level.DEBUG);
+		try {
+			runnable.run();
+		}
+		finally {
+			logger.setLevel(currentLevel);
+		}
+	}
+
+}

src/checkstyle/checkstyle-suppressions.xml

@@ -5,6 +5,7 @@
 <suppressions>
 	<suppress files="ConditionEvaluationReportLoggerTests\.java" checks="IllegalImport" />
 	<suppress files="ConditionEvaluationReportLoggingListenerTests\.java" checks="IllegalImport" />
+	<suppress files="ConditionEvaluationReportLoggingProcessorTests\.java" checks="IllegalImport" />
 	<suppress files="LoggingApplicationListenerTests\.java" checks="IllegalImport" />
 	<suppress files="LogbackInitializer\.java" checks="IllegalImport" />
 	<suppress files="LogbackLoggingSystem\.java" checks="IllegalImport" />