org.springframework.boot.autoconfigure.context.MessageSourceAutoConfiguration Maven / Gradle / Ivy
/*
* Copyright 2012-2018 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
*
* http://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.nio.charset.Charset;
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.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
*/
@Configuration
@ConditionalOnMissingBean(value = MessageSource.class, search = SearchStrategy.CURRENT)
@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
@Conditional(ResourceBundleCondition.class)
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "spring.messages")
public class MessageSourceAutoConfiguration {
private static final Resource[] NO_RESOURCES = {};
/**
* Comma-separated list of basenames (essentially a fully-qualified classpath
* location), each following the ResourceBundle convention with relaxed support for
* slash based locations. If it doesn't contain a package qualifier (such as
* "org.mypackage"), it will be resolved from the classpath root.
*/
private String basename = "messages";
/**
* Message bundles encoding.
*/
private Charset encoding = Charset.forName("UTF-8");
/**
* Loaded resource bundle files cache expiration, in seconds. When set to -1, bundles
* are cached forever.
*/
private int cacheSeconds = -1;
/**
* Set whether to fall back to the system Locale if no files for a specific Locale
* have been found. if this is turned off, the only fallback will be the default file
* (e.g. "messages.properties" for basename "messages").
*/
private boolean fallbackToSystemLocale = true;
/**
* Set whether to always apply the MessageFormat rules, parsing even messages without
* arguments.
*/
private boolean alwaysUseMessageFormat = false;
@Bean
public MessageSource messageSource() {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(this.basename)) {
messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(
StringUtils.trimAllWhitespace(this.basename)));
}
if (this.encoding != null) {
messageSource.setDefaultEncoding(this.encoding.name());
}
messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale);
messageSource.setCacheSeconds(this.cacheSeconds);
messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat);
return messageSource;
}
public String getBasename() {
return this.basename;
}
public void setBasename(String basename) {
this.basename = basename;
}
public Charset getEncoding() {
return this.encoding;
}
public void setEncoding(Charset encoding) {
this.encoding = encoding;
}
public int getCacheSeconds() {
return this.cacheSeconds;
}
public void setCacheSeconds(int cacheSeconds) {
this.cacheSeconds = cacheSeconds;
}
public boolean isFallbackToSystemLocale() {
return this.fallbackToSystemLocale;
}
public void setFallbackToSystemLocale(boolean fallbackToSystemLocale) {
this.fallbackToSystemLocale = fallbackToSystemLocale;
}
public boolean isAlwaysUseMessageFormat() {
return this.alwaysUseMessageFormat;
}
public void setAlwaysUseMessageFormat(boolean alwaysUseMessageFormat) {
this.alwaysUseMessageFormat = alwaysUseMessageFormat;
}
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;
}
}
}
}