According to my requirement, I need to externalize the message.properties file (Keep outside from war file) and in same time it should be automatically re loadable on update.
So I achieved both by following code and its working fine with Jetty Server. But in when I use Tomcat Server that externalized property file is not picking up by the system, instead its uses only the file inside the war.
public final class Messages
{
public static final String BUNDLE_NAME = "com.sample.project.core.ui.resources.messages";
// private static ResourceBundle resourceBundle = ResourceBundle.getBundle(BUNDLE_NAME);
private static ResourceBundle resourceBundle;
private static final Logger LOGGER = Logger.getLogger(Messages.class);
private static ReloadableResourceBundleMessageSource messageSource;
static
{
try
{
FileInputStream fis =
new FileInputStream(System.getProperty("resources.messages.file.path"));
resourceBundle = new PropertyResourceBundle(fis);
}
catch (FileNotFoundException e)
{
LOGGER.error("messages.properties file not found: " + e);
resourceBundle = ResourceBundle.getBundle(BUNDLE_NAME);
}
catch (Exception e)
{
LOGGER.error("messages.properties file reading failed: " + e);
resourceBundle = ResourceBundle.getBundle(BUNDLE_NAME);
}
}
private Messages()
{
}
/**
* <p>
* setter methos to ReloadableResourceBundleMessageSource object.
* </p>
*
*
* @param inMessageSource
* set reloadable resources bundle
**/
public static void setMessageSource(final ReloadableResourceBundleMessageSource inMessageSource)
{
Messages.messageSource = inMessageSource;
Messages.messageSource.setBasename(System.getProperty("resources.messages.file.path"));
}
/**
* <p>
* Resolve a message by a key and argument replacements.
* </p>
*
* @see MessageFormat#format(String, Object...)
* @param key
* the message to look up
* @param arguments
* optional message arguments
* @return the resolved message
**/
public static String getMessage(final String key, final Object... arguments)
{
try
{
if (messageSource != null)
{
return messageSource.getMessage(key, arguments, Locale.getDefault());
}
else
{
if (arguments != null)
return MessageFormat.format(resourceBundle.getString(key), arguments);
return resourceBundle.getString(key);
}
}
catch (NoSuchMessageException e)
{
LOGGER.error("Message key not found: " + key);
return '!' + key + '!';
}
catch (MissingResourceException e)
{
LOGGER.error("Message key not found: " + key);
return '!' + key + '!';
}
}
}
(Here file path I'm passing as a VM argument using "resources.messages.file.path
" key)
First I thought it was a problem with accessing the file system and tried many ways. Then I heard about catalina.policy file and I added some lines like this..
grant codeBase "file:${catalina.base}/webapps/sample.war/-" {
permission java.security.AllPermission;
permission java.io.FilePermission "file:${catalina.base}${file.separator}webapps${file.separator}messages.properties", "read, write";
permission java.util.PropertyPermission "resources.messages.file.path", "read";
}
But non of them gave me luck. I'm desperate. Any idea what this issue is? Please help me. Thank you in advance. (Tested on Tomcat6)