I have a few questions on the creation of a custom MessageResourcesFactory which I am hoping someone can help answer. We have a database which contains most of the translation string for our application, so I would like to create the MessageResources from here in addition to the standard ApplicationResource.properties file. I have written my own PropertyMessageResourcesFactory, modified my web.xml so that Struts would use this factory, and extended the ActionServlet to call a method to load the data from the database. I thought this would provide a simple yet elegant solution because nothing else would need to change for it to work.
My questions:
1. While it appears that my code is adding the content of the tables to the messages HashMap, when I go to reference them with a <bean:message key="MLSBuyer.title"> I get the following exception:
Missing message for key
MLSBuyer.title' javax.servlet.jsp.JspException: Missing message for key
MLSBuyer.title at
org.apache.struts.taglib.bean.MessageTag.doStartTag(MessageTag.java:298) at
org.apache.jsp.CompanyZoomBody$jsp._jspService(CompanyZoomBody$jsp.java:84) at ...
I have not implemented the getMessage(Locale locale, String key) method in my custom PropertyMessageResources class, I was hoping that the messages that I created would become part of the default bundle/messages hashmap and therefore would be available to the Struts frame work. This does no appear to be what is happening. Is there a specific Servlet context attribute or some other value which needs to be set for these messages to be included in the standard bundle? What is the difference between Action.MESSAGE_KEY and Action.MESSAGES_KEY?
2. What else needs to be done to make these available in the default bundle so that the Struts frame work can use them without us having to implement the getMessages() methods? Or can this be done?
3. Are there any major issues/drawbacks with using the database like this for building the messages HashMap? We will still use the ApplicationResources.properties file where appropriate, but since the database already has the other translation information in it, it seems logical to use it, but I am open for other views on this.
I have attached the MessageResourcesFactory, DBMessageResourcesFactory and the actual class which is created from within the factory, BasePropertyMessageResources. Below is the initApplication() method which we have added to the extended ActionServlet to invoke the method "dbLoad()" in the BasePropertyMessageResources class.
Thanks in advance.
Todd G. Nist
Email: [EMAIL PROTECTED]
// initApplicationn method of the extended ActionServlet
public void initApplication() throws ServletException {
super.initApplication();
String dataSource = getServletConfig().getInitParameter("datasource");
MessageResources mr =
(MessageResources)getServletContext().getAttribute(Action.MESSAGES_KEY);
if (mr == null) {
System.out.println("Message Resource is invalid....");
return;
}
// load resources from the dataSource
((BasePropertyMessageResources)mr).dbLoad(dataSource);
}
DBMessageResourcesFactory.java
Description: Binary data
BasePropertyMessageResources.java
Description: Binary data
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