Hi!
My application stores localized messages in the database. It's a big
application, and each customer wants a lot of customization. So for every
framework we use, we need to plug into the message system to get what we
want. Every call to messages.get('validation-error-required') needs a
parameter for languageId/locale and customerId. And it must be retrieved
from the database, not from a resources file.
For Struts, I replaced the entire Struts message system with my own custom
tag.
For T4, I contributed my own service in hivemodule.xml. The entire
implementation is listed below if someone should find this
interesting/useful. I injected the servlet request, where user/customer info
is stored in the session, into my service, and did the DB-calls from there.
In T5, I'm looking for a similar solution. So far I have found the following
interesting places in TapestryModule, does anyone feel like pointing me in
the right direction?
public ComponentMessagesSource buildComponentMessagesSource
public void contributeValidationMessagesSource(Configuration<String>
configuration)
public ValidationMessagesSource buildValidationMessagesSource
T4 custom messages implemtation:
<service-point id="ComponentMessagesSource"
interface="org.apache.tapestry.services.ComponentMessagesSource">
Used to provide components (including pages) with access to
their own localized messages.
<invoke-factory>
<construct
class="common.tapestry.ComponentMessagesSourceImpl">
<set-object property="request"
value="service:tapestry.globals.HttpServletRequest" />
</construct>
</invoke-factory>
</service-point>
public class ComponentMessagesSourceImpl implements ComponentMessagesSource
{
static Log log = LogFactory.getLog(ComponentMessagesSourceImpl.class);
private HttpServletRequest request;
public void setRequest(HttpServletRequest request) {
this.request = request;
}
public Messages getMessages(IComponent component) {
return new MessagesTapestryWrapper(request);
}
}
public class MessagesTapestryWrapper implements org.apache.hivemind.Messages
{
static Log log = LogFactory.getLog(MessagesTapestryWrapper.class);
private HttpServletRequest request;
public MessagesTapestryWrapper(HttpServletRequest request) {
this.request = request;
}
public String format(String key, Object arg0) {
Object[] args = { arg0 };
return format(key, args);
}
public String format(String key, Object arg0, Object arg1) {
Object[] args = { arg0, arg1 };
return format(key, args);
}
public String format(String key, Object[] args) {
return Lang.get(request, key, args);
}
public String format(String key, Object arg0, Object arg1, Object arg2) {
Object[] args = { arg0, arg1, arg2 };
return format(key, args);
}
public String getMessage(String key) {
String message = Lang.get(request, key);
return message;
}
}
