Skip BeanInfo class search by default

Set `CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME` by
default to improve startup performance. The `spring.beaninfo.ignore`
property can be set in `application.properties` if BeanInfo classes
should be searched.

Fixes gh-4390

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -58,6 +58,9 @@ content into your application; rather pick only the properties that you need.
 	# AUTO-CONFIGURATION
 	spring.autoconfigure.exclude= # Auto-configuration classes to exclude.
 
+	# SPRING CORE
+	spring.beaninfo.ignore=true # Skip search of BeanInfo classes.
+
 	# SPRING CACHE ({sc-spring-boot-autoconfigure}/cache/CacheProperties.{sc-ext}[CacheProperties])
 	spring.cache.cache-names= # Comma-separated list of cache names to create if supported by the underlying cache manager.
 	spring.cache.ehcache.config= # The location of the configuration file to use to initialize EhCache.

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -30,10 +30,12 @@ import java.util.Set;
 import org.apache.commons.logging.Log;
 
 import org.springframework.beans.BeansException;
+import org.springframework.beans.CachedIntrospectionResults;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.bind.PropertiesConfigurationFactory;
+import org.springframework.boot.bind.RelaxedPropertyResolver;
 import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
 import org.springframework.boot.context.event.ApplicationPreparedEvent;
 import org.springframework.boot.env.EnumerableCompositePropertySource;
@@ -165,9 +167,21 @@ public class ConfigFileApplicationListener implements EnvironmentPostProcessor,
 	public void postProcessEnvironment(ConfigurableEnvironment environment,
 			SpringApplication application) {
 		addPropertySources(environment, application.getResourceLoader());
+		configureIgnoreBeanInfo(environment);
 		bindToSpringApplication(environment, application);
 	}
 
+	private void configureIgnoreBeanInfo(ConfigurableEnvironment environment) {
+		if (System.getProperty(
+				CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME) == null) {
+			RelaxedPropertyResolver resolver = new RelaxedPropertyResolver(environment,
+					"spring.beaninfo.");
+			Boolean ignore = resolver.getProperty("ignore", Boolean.class, Boolean.TRUE);
+			System.setProperty(CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME,
+					ignore.toString());
+		}
+	}
+
 	private void onApplicationPreparedEvent(ApplicationEvent event) {
 		this.logger.replayTo(ConfigFileApplicationListener.class);
 		addPostProcessors(((ApplicationPreparedEvent) event).getApplicationContext());

spring-boot/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -96,6 +96,13 @@
     "sourceType": "org.springframework.boot.context.ContextIdApplicationContextInitializer",
     "description": "Application index."
   },
+  {
+    "name": "spring.beaninfo.ignore",
+    "type": "java.lang.Boolean",
+    "sourceType": "org.springframework.boot.context.config.ConfigFileApplicationListener",
+    "description": "Skip search of BeanInfo classes.",
+    "defaultValue": true
+  },
   {
     "name": "spring.config.name",
     "type": "java.lang.String",

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -40,6 +40,7 @@ import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.slf4j.LoggerFactory;
 
+import org.springframework.beans.CachedIntrospectionResults;
 import org.springframework.boot.Banner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.context.config.ConfigFileApplicationListener.ConfigurationPropertySources;
@@ -111,6 +112,7 @@ public class ConfigFileApplicationListenerTests {
 		System.clearProperty("the.property");
 		System.clearProperty("spring.config.location");
 		System.clearProperty("spring.main.banner-mode");
+		System.clearProperty(CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME);
 	}
 
 	@Test
@@ -743,6 +745,26 @@ public class ConfigFileApplicationListenerTests {
 		assertThat(property, equalTo("baz"));
 	}
 
+	@Test
+	public void setIgnoreBeanInfoPropertyByDefault() throws Exception {
+		this.initializer.setSearchNames("testproperties");
+		this.initializer.postProcessEnvironment(this.environment, this.application);
+		String property = System
+				.getProperty(CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME);
+		assertThat(property, equalTo("true"));
+	}
+
+	@Test
+	public void disableIgnoreBeanInfoProperty() throws Exception {
+		this.initializer.setSearchNames("testproperties");
+		EnvironmentTestUtils.addEnvironment(this.environment,
+				"spring.beaninfo.ignore=false");
+		this.initializer.postProcessEnvironment(this.environment, this.application);
+		String property = System
+				.getProperty(CachedIntrospectionResults.IGNORE_BEANINFO_PROPERTY_NAME);
+		assertThat(property, equalTo("false"));
+	}
+
 	private static Matcher<? super ConfigurableEnvironment> containsPropertySource(
 			final String sourceName) {
 		return new TypeSafeDiagnosingMatcher<ConfigurableEnvironment>() {