CODEWITHSUNDEEP
gwt
sof
sof

Reputation: 9649

GWT codeserver parameter

i've encountered an issue on GWT codeserver parameter in a simple scenario below,

Project structure

myapp
+src
++mypkg
---MainWindow.gwt.xml
---NextWindow.gwt.xml
+++client
----MainWindow.java
----NextWindow.java
+war
--MainWindow.html
--NextWindow.html

MainWindow.gwt.xml

<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='mainwindow'>
  <inherits name='com.google.gwt.user.User'/>
  <entry-point class='mypkg.client.Mainwindow'/>
  <source path='client'/>
</module>

MainWindow.java

package mypkg.client;

import com.google.gwt.core.client.*;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.user.client.ui.*;

public class MainWindow implements EntryPoint {
    @Override
    public void onModuleLoad() {
        Button button = new Button("NextWindow!");
        button.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                Window.open("/NextWindow.html", null, null);
            }
        });
        RootPanel.get().add(button);
    }
}

MainWindow.html

<!doctype html>      
<html>
<head>
<title>MainWindow</title>  
<script type="text/javascript" language="javascript"
    src="mainwindow/mainwindow.nocache.js"></script>
</head>  
<body>
    <h1>Hi, MainWindow!</h1>   
</body>
</html>

NextWindow.gwt.xml

<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='nextwindow'>
  <inherits name='com.google.gwt.user.User'/>
  <entry-point class='mypkg.client.NextWindow'/>
  <source path='client'/>
</module>

NextWindow.java

package mypkg.client;

import com.google.gwt.core.client.*;
import com.google.gwt.user.client.ui.*;

public class NextWindow implements EntryPoint {    
    @Override
    public void onModuleLoad() {
        RootPanel.get().add(new Label("Hi, NewLabel!"));
    }
}

NextWindow.html

<!doctype html>      
<html>
<head>
<title>NextWindow</title>  
<script type="text/javascript" language="javascript"
    src="nextwindow/nextwindow.nocache.js"></script>
</head>  
<body>
    <h1>Hi, NextWindow!</h1>   
</body>
</html>

On Devmode launch the compiled myapp from the link,

http://127.0.0.1:8888/MainWindow.html?gwt.codesvr=127.0.0.1:9997

Click on button "NextWindow" then GWT browser plugin pops up a complaint window,

Module NextWindow need be (re)compiled!

Confirm it then a new browser window is open from the link on Prodmode,

http://127.0.0.1:8888/NextWindow.html

instead of the desired link on Devmode,

http://127.0.0.1:8888/NextWindow.html?gwt.codesvr=127.0.0.1:9997

Consequently it displays only,

Hi, NextWindow!

But the very anticipated content below doesn't show up,

Hi, NewLabel!

If we trail GWT codeserver parameter ?gwt.codesvr=127.0.0.1:9997 to the source code, the problem could be solved by sacrificing the consistency on source level between Devmode and Prodmode.

What are the preferable solutions indeed?

Upvotes: 0

Views: 402

Answers (1)

MarioP
MarioP

Reputation: 3832

You can use if(GWT.isProdMode()) to check for Prodmode and Devmode, and trail the parameter if it is devmode.

That doesn't affect production mode - the gwt compiler is smart enough to just ignore devmode-code, so the devmode-block never makes it into the compiled javascript.

Upvotes: 1

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