Use configuration resolver to replace standard resolver

Closes spring-projectsgh-28687

Author: terminux

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/context/ConfigurationPropertySourcesPlaceholderConfigurer.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2012-2023 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.context;
+
+import org.springframework.boot.context.properties.source.ConfigurationPropertySources;
+import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+import org.springframework.core.env.ConfigurablePropertyResolver;
+import org.springframework.core.env.MutablePropertySources;
+
+/**
+ * Placeholder configurer that resolves using the optimized
+ * {@link ConfigurablePropertyResolver}.
+ *
+ * @author Guirong Hu
+ */
+class ConfigurationPropertySourcesPlaceholderConfigurer extends PropertySourcesPlaceholderConfigurer {
+
+	// @Override
+	protected ConfigurablePropertyResolver createPropertyResolver(MutablePropertySources propertySources) {
+		return ConfigurationPropertySources.createPropertyResolver(propertySources);
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/context/PropertyPlaceholderAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -40,7 +40,7 @@ public class PropertyPlaceholderAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean(search = SearchStrategy.CURRENT)
 	public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
-		return new PropertySourcesPlaceholderConfigurer();
+		return new ConfigurationPropertySourcesPlaceholderConfigurer();
 	}
 
 }

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/ConfigurationPropertySourcesPlaceholderConfigurerTests.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2012-2023 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.context;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.boot.context.properties.source.ConfigurationPropertySources;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.ConfigurablePropertyResolver;
+import org.springframework.core.env.MutablePropertySources;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link ConfigurationPropertySourcesPlaceholderConfigurer}.
+ *
+ * @author Guirong Hu
+ */
+class ConfigurationPropertySourcesPlaceholderConfigurerTests {
+
+	@Test
+	void propertyResolverIsOptimizedForPropertyPlaceholder() {
+		ConfigurablePropertyResolver expected = ConfigurationPropertySources
+				.createPropertyResolver(new MutablePropertySources());
+
+		new ApplicationContextRunner().withUserConfiguration(GetPropertyResolverPlaceholderConfigurerConfig.class)
+				.run((context) -> assertThat(
+						context.getBean(GetPropertyResolverPlaceholderConfigurer.class).getPropertyResolver())
+								.hasSameClassAs(expected));
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	static class GetPropertyResolverPlaceholderConfigurerConfig {
+
+		@Bean
+		static GetPropertyResolverPlaceholderConfigurer getPropertyResolverPlaceholderConfigurer() {
+			return new GetPropertyResolverPlaceholderConfigurer();
+		}
+
+	}
+
+	static class GetPropertyResolverPlaceholderConfigurer extends ConfigurationPropertySourcesPlaceholderConfigurer {
+
+		private ConfigurablePropertyResolver propertyResolver;
+
+		@Override
+		protected void processProperties(ConfigurableListableBeanFactory beanFactoryToProcess,
+				ConfigurablePropertyResolver propertyResolver) throws BeansException {
+			this.propertyResolver = propertyResolver;
+			super.processProperties(beanFactoryToProcess, propertyResolver);
+		}
+
+		public ConfigurablePropertyResolver getPropertyResolver() {
+			return this.propertyResolver;
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/PropertyPlaceholderAutoConfigurationTests.java

@@ -113,7 +113,7 @@ static class PlaceholdersOverride {
 
 		@Bean
 		static PropertySourcesPlaceholderConfigurer morePlaceholders() {
-			PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
+			PropertySourcesPlaceholderConfigurer configurer = new ConfigurationPropertySourcesPlaceholderConfigurer();
 			configurer
 					.setProperties(StringUtils.splitArrayElementsIntoProperties(new String[] { "fruit=orange" }, "="));
 			configurer.setLocalOverride(true);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2023 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.
@@ -20,11 +20,12 @@
 import java.nio.charset.StandardCharsets;
 import java.util.function.BiConsumer;
 
+import org.springframework.boot.context.properties.source.ConfigurationPropertySources;
 import org.springframework.boot.system.ApplicationPid;
 import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.ConfigurablePropertyResolver;
 import org.springframework.core.env.Environment;
 import org.springframework.core.env.PropertyResolver;
-import org.springframework.core.env.PropertySourcesPropertyResolver;
 import org.springframework.util.Assert;
 
 /**
@@ -162,8 +163,8 @@ protected void apply(LogFile logFile, PropertyResolver resolver) {
 
 	private PropertyResolver getPropertyResolver() {
 		if (this.environment instanceof ConfigurableEnvironment configurableEnvironment) {
-			PropertySourcesPropertyResolver resolver = new PropertySourcesPropertyResolver(
-					configurableEnvironment.getPropertySources());
+			ConfigurablePropertyResolver resolver = ConfigurationPropertySources
+					.createPropertyResolver(configurableEnvironment.getPropertySources());
 			resolver.setConversionService(((ConfigurableEnvironment) this.environment).getConversionService());
 			resolver.setIgnoreUnresolvableNestedPlaceholders(true);
 			return resolver;