org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration Maven / Gradle / Ivy
/*
* Copyright 2012-2019 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 java.time.Duration;
import org.springframework.boot.autoconfigure.AutoConfigureOrder;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionMessage;
import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.SearchStrategy;
import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
import org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration.ResourceBundleCondition;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.core.Ordered;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.type.AnnotatedTypeMetadata;
import org.springframework.util.ConcurrentReferenceHashMap;
import org.springframework.util.StringUtils;
/**
* {@link EnableAutoConfiguration Auto-configuration} for {@link MessageSource}.
*
* @author Dave Syer
* @author Phillip Webb
* @author Eddú Meléndez
* @since 1.5.0
*/
@Configuration(proxyBeanMethods = false)
@ConditionalOnMissingBean(name = AbstractApplicationContext.MESSAGE_SOURCE_BEAN_NAME, search = SearchStrategy.CURRENT)
@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
@Conditional(ResourceBundleCondition.class)
@EnableConfigurationProperties
public class MessageSourceAutoConfiguration {
private static final Resource[] NO_RESOURCES = {};
@Bean
@ConfigurationProperties(prefix = "spring.messages")
public MessageSourceProperties messageSourceProperties() {
return new MessageSourceProperties();
}
@Bean
public MessageSource messageSource(MessageSourceProperties properties) {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(properties.getBasename())) {
messageSource.setBasenames(StringUtils
.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename())));
}
if (properties.getEncoding() != null) {
messageSource.setDefaultEncoding(properties.getEncoding().name());
}
messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale());
Duration cacheDuration = properties.getCacheDuration();
if (cacheDuration != null) {
messageSource.setCacheMillis(cacheDuration.toMillis());
}
messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat());
messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage());
return messageSource;
}
protected static class ResourceBundleCondition extends SpringBootCondition {
private static ConcurrentReferenceHashMap cache = new ConcurrentReferenceHashMap<>();
@Override
public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
String basename = context.getEnvironment().getProperty("spring.messages.basename", "messages");
ConditionOutcome outcome = cache.get(basename);
if (outcome == null) {
outcome = getMatchOutcomeForBasename(context, basename);
cache.put(basename, outcome);
}
return outcome;
}
private ConditionOutcome getMatchOutcomeForBasename(ConditionContext context, String basename) {
ConditionMessage.Builder message = ConditionMessage.forCondition("ResourceBundle");
for (String name : StringUtils.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(basename))) {
for (Resource resource : getResources(context.getClassLoader(), name)) {
if (resource.exists()) {
return ConditionOutcome.match(message.found("bundle").items(resource));
}
}
}
return ConditionOutcome.noMatch(message.didNotFind("bundle with basename " + basename).atAll());
}
private Resource[] getResources(ClassLoader classLoader, String name) {
String target = name.replace('.', '/');
try {
return new PathMatchingResourcePatternResolver(classLoader)
.getResources("classpath*:" + target + ".properties");
}
catch (Exception ex) {
return NO_RESOURCES;
}
}
}
}