spring ConfigDataLocationRuntimeHints 源码
springboot ConfigDataLocationRuntimeHints 代码
文件路径:/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/config/ConfigDataLocationRuntimeHints.java
/*
* 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.context.config;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.aot.hint.RuntimeHints;
import org.springframework.aot.hint.RuntimeHintsRegistrar;
import org.springframework.aot.hint.support.FilePatternResourceHintsRegistrar;
import org.springframework.boot.env.PropertySourceLoader;
import org.springframework.core.io.support.SpringFactoriesLoader;
import org.springframework.util.ResourceUtils;
/**
* {@link RuntimeHintsRegistrar} implementation for application configuration.
*
* @author Stephane Nicoll
* @see FilePatternResourceHintsRegistrar
*/
class ConfigDataLocationRuntimeHints implements RuntimeHintsRegistrar {
private static final Log logger = LogFactory.getLog(ConfigDataLocationRuntimeHints.class);
@Override
public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
List<String> fileNames = getFileNames(classLoader);
List<String> locations = getLocations(classLoader);
List<String> extensions = getExtensions(classLoader);
if (logger.isDebugEnabled()) {
logger.debug("Registering application configuration hints for " + fileNames + "(" + extensions + ") at "
+ locations);
}
new FilePatternResourceHintsRegistrar(fileNames, locations, extensions).registerHints(hints.resources(),
classLoader);
}
/**
* Get the application file names to consider.
* @param classLoader the classloader to use
* @return the configuration file names
*/
protected List<String> getFileNames(ClassLoader classLoader) {
return Arrays.asList(StandardConfigDataLocationResolver.DEFAULT_CONFIG_NAMES);
}
/**
* Get the locations to consider. A location is a classpath location that may or may
* not use the standard {@code classpath:} prefix.
* @param classLoader the classloader to use
* @return the configuration file locations
*/
protected List<String> getLocations(ClassLoader classLoader) {
List<String> classpathLocations = new ArrayList<>();
for (ConfigDataLocation candidate : ConfigDataEnvironment.DEFAULT_SEARCH_LOCATIONS) {
for (ConfigDataLocation configDataLocation : candidate.split()) {
String location = configDataLocation.getValue();
if (location.startsWith(ResourceUtils.CLASSPATH_URL_PREFIX)) {
classpathLocations.add(location);
}
}
}
return classpathLocations;
}
/**
* Get the application file extensions to consider. A valid extension starts with a
* dot.
* @param classLoader the classloader to use
* @return the configuration file extensions
*/
protected List<String> getExtensions(ClassLoader classLoader) {
List<String> extensions = new ArrayList<>();
List<PropertySourceLoader> propertySourceLoaders = getSpringFactoriesLoader(classLoader)
.load(PropertySourceLoader.class);
for (PropertySourceLoader propertySourceLoader : propertySourceLoaders) {
for (String fileExtension : propertySourceLoader.getFileExtensions()) {
String candidate = "." + fileExtension;
if (!extensions.contains(candidate)) {
extensions.add(candidate);
}
}
}
return extensions;
}
protected SpringFactoriesLoader getSpringFactoriesLoader(ClassLoader classLoader) {
return SpringFactoriesLoader.forDefaultResourceLocation(classLoader);
}
}
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