I'm currently trying to implement a simple servlet that will
dynamically create the host html page to be able to support dynamic
internationalization of the application similar to the suggested
approach from this thread[1].
The code I have is the following:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class I18nServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse
resp) throws ServletException,
IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
out.println("<!DOCTYPE html><html><head><link type=\"text/css
\" rel=\"stylesheet\" href=\"LeonidsExplorer.css\">"+
"<title>PreferencesExplorer</title>"+
"<script type=\"text/javascript\" language=\"javascript\"
src=\"LeonidsExplorer.nocache.js\"/></head>"+
"<body><script type=\"text/javascript\" language=
\"javascript\">"+
"var ResourceMessages = {"+
"\"login.dialog.username.label\": \"Username\","+
"\"login.dialog.password.label\": \"Password\","+
"\"login.dialog.title\": \"Login\","+
"\"login.dialog.username.example\": \"usern...@authority
\","+
"\"login.dialog.button\": \"Login\","+
"\"preferences.header.view.preferences.button\":
\"Preferences\","+
"\"preferences.header.view.admins.button\":
\"Administrators\","+
"\"preferences.header.view.logout.button\": \"Logout\","+
"\"preferences.header.view.help.link\": \"Help\","+
"\"preferences.header.view.welcome\": \"Welcome\""+
"\"admins.panel.view.big.label\": \"Authorities\","+
"\"authority.select.view.root.admins.text\": \"Root
Administrators\"};"+
"</script></body></html>"
);
}
}
I have the web.xml file configured so this servlet will get called
when the host html file is accessed. When running in hosted mode, the
page doesn't load because of the following exception:
java.util.MissingResourceException: 'ResourceMessages' is not a
JavaScript object and cannot be used as a Dictionary at
com.google.gwt.i18n.client.Dictionary.resourceErrorBadType(Dictionary.java:
100) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25) at java.lang.reflect.Method.invoke(Method.java:597) at
com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:
71) at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:
157) at
com.google.gwt.dev.shell.BrowserChannel.reactToMessagesWhileWaitingForReturn(BrowserChannel.java:
1713) at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:
165) at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:
120) at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:
507) at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:
284) at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:
107) at com.google.gwt.i18n.client.Dictionary.attach(Dictionary.java)
at com.google.gwt.i18n.client.Dictionary.<init>(Dictionary.java:121)
at com.google.gwt.i18n.client.Dictionary.getDictionary(Dictionary.java:
93)
The code in the onModuleLoad() method is simply doing:
Dictionary.getDictionary("ResourceMessages");
Viewing the source of the page I see the page generated by the
servlet. The title of the page loads so the servlet is being
called.
Does anyone have any suggestions on what's preventing it from locating
the dictionary? Is it a race/timing issue because the page hasn't
loaded yet by the time the GWT code starts executing?
Thanks for your help,
Micah
[1] -http://groups.google.com/group/google-web-toolkit/browse_thread/
thread/53c36ddcf511d36/7076c34b8e090d67?lnk=gst&q=Proper+way+to
+dynamically+internationalize+an+already+compiled+application+Options
+#7076c34b8e090d67
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