ResolvableType-based resolution uses BeanNamesByType cache if possible

Issue: SPR-17282

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -453,7 +453,13 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 
 	@Override
 	public String[] getBeanNamesForType(ResolvableType type) {
-		return doGetBeanNamesForType(type, true, true);
+		Class<?> resolved = type.resolve();
+		if (resolved != null && !type.hasGenerics()) {
+			return getBeanNamesForType(resolved, true, true);
+		}
+		else {
+			return doGetBeanNamesForType(type, true, true);
+		}
 	}
 
 	@Override

spring-beans/src/test/java/org/springframework/beans/factory/DefaultListableBeanFactoryTests.java

@@ -2440,6 +2440,7 @@ public class DefaultListableBeanFactoryTests {
 		RootBeanDefinition rbd = new RootBeanDefinition(TestBean.class);
 		rbd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
 		lbf.registerBeanDefinition("test", rbd);
+		lbf.freezeConfiguration();
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
 		for (int i = 0; i < 100000; i++) {
@@ -2460,6 +2461,7 @@ public class DefaultListableBeanFactoryTests {
 		rbd.setDependencyCheck(RootBeanDefinition.DEPENDENCY_CHECK_OBJECTS);
 		lbf.registerBeanDefinition("test", rbd);
 		lbf.addBeanPostProcessor(new LifecycleBean.PostProcessor());
+		lbf.freezeConfiguration();
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
 		for (int i = 0; i < 100000; i++) {
@@ -2470,29 +2472,6 @@ public class DefaultListableBeanFactoryTests {
 		assertTrue("Prototype creation took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 3000);
 	}
 
-	/**
-	 * @Test
-	 * public void testPrototypeCreationIsFastEnough2() {
-	 * if (factoryLog.isTraceEnabled() || factoryLog.isDebugEnabled()) {
-	 * // Skip this test: Trace logging blows the time limit.
-	 * return;
-	 * }
-	 * DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
-	 * Method setBeanNameMethod = TestBean.class.getMethod("setBeanName", String.class);
-	 * Method setBeanFactoryMethod = TestBean.class.getMethod("setBeanFactory", BeanFactory.class);
-	 * StopWatch sw = new StopWatch();
-	 * sw.start("prototype");
-	 * for (int i = 0; i < 100000; i++) {
-	 * TestBean tb = TestBean.class.newInstance();
-	 * setBeanNameMethod.invoke(tb, "test");
-	 * setBeanFactoryMethod.invoke(tb, lbf);
-	 * }
-	 * sw.stop();
-	 * // System.out.println(sw.getTotalTimeMillis());
-	 * assertTrue("Prototype creation took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 500);
-	 * }
-	 */
-
 	@Test
 	@Ignore  // TODO re-enable when ConstructorResolver TODO sorted out
 	public void testPrototypeCreationWithConstructorArgumentsIsFastEnough() {
@@ -2504,6 +2483,7 @@ public class DefaultListableBeanFactoryTests {
 		rbd.getConstructorArgumentValues().addGenericArgumentValue("juergen");
 		rbd.getConstructorArgumentValues().addGenericArgumentValue("99");
 		lbf.registerBeanDefinition("test", rbd);
+		lbf.freezeConfiguration();
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
 		for (int i = 0; i < 100000; i++) {
@@ -2526,6 +2506,7 @@ public class DefaultListableBeanFactoryTests {
 		rbd.getConstructorArgumentValues().addGenericArgumentValue(new RuntimeBeanReference("spouse"));
 		lbf.registerBeanDefinition("test", rbd);
 		lbf.registerBeanDefinition("spouse", new RootBeanDefinition(TestBean.class));
+		lbf.freezeConfiguration();
 		TestBean spouse = (TestBean) lbf.getBean("spouse");
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
@@ -2548,6 +2529,7 @@ public class DefaultListableBeanFactoryTests {
 		rbd.getPropertyValues().add("name", "juergen");
 		rbd.getPropertyValues().add("age", "99");
 		lbf.registerBeanDefinition("test", rbd);
+		lbf.freezeConfiguration();
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
 		for (int i = 0; i < 100000; i++) {
@@ -2570,6 +2552,7 @@ public class DefaultListableBeanFactoryTests {
 		rbd.getPropertyValues().add("spouse", new RuntimeBeanReference("spouse"));
 		lbf.registerBeanDefinition("test", rbd);
 		lbf.registerBeanDefinition("spouse", new RootBeanDefinition(TestBean.class));
+		lbf.freezeConfiguration();
 		TestBean spouse = (TestBean) lbf.getBean("spouse");
 		StopWatch sw = new StopWatch();
 		sw.start("prototype");
@@ -2582,6 +2565,40 @@ public class DefaultListableBeanFactoryTests {
 		assertTrue("Prototype creation took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 4000);
 	}
 
+	@Test
+	public void testSingletonLookupByNameIsFastEnough() {
+		// Assume.group(TestGroup.PERFORMANCE);
+		Assume.notLogging(factoryLog);
+		DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
+		lbf.registerBeanDefinition("test", new RootBeanDefinition(TestBean.class));
+		lbf.freezeConfiguration();
+		StopWatch sw = new StopWatch();
+		sw.start("singleton");
+		for (int i = 0; i < 1000000; i++) {
+			lbf.getBean("test");
+		}
+		sw.stop();
+		// System.out.println(sw.getTotalTimeMillis());
+		assertTrue("Singleton lookup took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 1000);
+	}
+
+	@Test
+	public void testSingletonLookupByTypeIsFastEnough() {
+		// Assume.group(TestGroup.PERFORMANCE);
+		Assume.notLogging(factoryLog);
+		DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
+		lbf.registerBeanDefinition("test", new RootBeanDefinition(TestBean.class));
+		lbf.freezeConfiguration();
+		StopWatch sw = new StopWatch();
+		sw.start("singleton");
+		for (int i = 0; i < 1000000; i++) {
+			lbf.getBean(TestBean.class);
+		}
+		sw.stop();
+		// System.out.println(sw.getTotalTimeMillis());
+		assertTrue("Singleton lookup took too long: " + sw.getTotalTimeMillis(), sw.getTotalTimeMillis() < 1000);
+	}
+
 	@Test
 	public void testBeanPostProcessorWithWrappedObjectAndDisposableBean() {
 		DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();

spring-core/src/main/java/org/springframework/core/ResolvableType.java

@@ -765,8 +765,11 @@ public class ResolvableType implements Serializable {
 	/**
 	 * Resolve this type to a {@link java.lang.Class}, returning {@code null}
 	 * if the type cannot be resolved. This method will consider bounds of
-	 * {@link TypeVariable TypeVariables} and {@link WildcardType WildcardTypes} if direct resolution fails;
-	 * however, bounds of {@code Object.class} will be ignored.
+	 * {@link TypeVariable TypeVariables} and {@link WildcardType WildcardTypes} if
+	 * direct resolution fails; however, bounds of {@code Object.class} will be ignored.
+	 * <p>If this method returns a non-null {@code Class} and {@link #hasGenerics()}
+	 * returns {@code false}, the given type effectively wraps a plain {@code Class},
+	 * allowing for plain {@code Class} processing if desirable.
 	 * @return the resolved {@link Class}, or {@code null} if not resolvable
 	 * @see #resolve(Class)
 	 * @see #resolveGeneric(int...)
@@ -780,8 +783,8 @@ public class ResolvableType implements Serializable {
 	/**
 	 * Resolve this type to a {@link java.lang.Class}, returning the specified
 	 * {@code fallback} if the type cannot be resolved. This method will consider bounds
-	 * of {@link TypeVariable TypeVariables} and {@link WildcardType WildcardTypes} if direct resolution fails;
-	 * however, bounds of {@code Object.class} will be ignored.
+	 * of {@link TypeVariable TypeVariables} and {@link WildcardType WildcardTypes} if
+	 * direct resolution fails; however, bounds of {@code Object.class} will be ignored.
 	 * @param fallback the fallback class to use if resolution fails
 	 * @return the resolved {@link Class} or the {@code fallback}
 	 * @see #resolve()