package ru.xpoft.vaadin;
import com.vaadin.server.SystemMessages;
import com.vaadin.server.SystemMessagesInfo;
import com.vaadin.server.SystemMessagesProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.MessageSource;
import java.util.Locale;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* @author xpoft
*/
public class SpringVaadinSystemMessagesProvider implements SystemMessagesProvider
{
public static final String DEFAULT_IMPLEMENTATION = "DEFAULT";
private static Logger logger = LoggerFactory.getLogger(SpringVaadinSystemMessagesProvider.class);
private final ConcurrentMap<Locale, SystemMessages> systemMessagesCache = new ConcurrentHashMap<Locale, SystemMessages>();
private SpringSystemMessagesProvider systemMessagesBean;
public SpringVaadinSystemMessagesProvider(ApplicationContext applicationContext, String systemMessagesBeanName)
{
if (systemMessagesBeanName.equals(DEFAULT_IMPLEMENTATION))
{
MessageSource messageSource = applicationContext.getBean(MessageSource.class);
systemMessagesBean = new DefaultSpringSystemMessagesProvider();
((DefaultSpringSystemMessagesProvider)systemMessagesBean).setMessageSource(messageSource);
logger.debug("use default systemMessagesBean");
}
else
{
systemMessagesBean = applicationContext.getBean(systemMessagesBeanName, SpringSystemMessagesProvider.class);
}
logger.debug("get systemMessagesBean: {}", systemMessagesBean);
}
@Override
public SystemMessages getSystemMessages(SystemMessagesInfo systemMessagesInfo)
{
Locale locale = systemMessagesInfo.getLocale();
if (systemMessagesCache.containsKey(locale))
{
return systemMessagesCache.get(locale);
}
SystemMessages systemMessages = systemMessagesBean.getSystemMessages(locale);
systemMessagesCache.put(locale, systemMessages);
return systemMessages;
}
}