Develop Reference

GWT/GXT adding nocache.js file, in the header or after the body?

I notice that most GXT/GWT applications put the nocache.js file after the body tag. And few seem to put in the include in the header tag. Why is that?

Given the fact that the GWT script tag will be evaluated synchronously (the tag), but fetched asynchronously (the code, into an iframe), I don't see why not put it as the very first thing. Time saved!
Unless, you have some kind of complex logic that cannot have the chance to be properly displayed before the onModuleLoad() call (e.g., images evaluated but still not fetched), much like Steffen Schäfer pointed out. But you can defer you app startup for them though.
For more info, have a look here.

From my point of view there are 2 cases:
If you use GWT to only enhance your page that is generated on the server side then put the <script> at the end. That allows your browser to render the initial content of the page before parsing the JS code.
If you built a single page application that is completely generated by GWT on the client side, there's no content to be initially shown. In that case you can put the <script> to the head.
Be aware that 1. also applies if you implemented a loading animation or placeholder content to be initially shown.

How to render HTML form fields and run Java code in background simultaneously in JSP

I have made a JSP page that has form fields and java code in scriplets .I have imported the java code in JSP page and made object to call the function of that java class.
When i execute the JSP, the JSP page remains blank and only when all the Java code has been executed then the html form fields are rendered on the view.
I have two questions:
1.)How can i quick this process and how can i show something like "Loading..." until that html is rendered
OR
2) How can I make HTML fields to appear as soon as JSP page is invoked while letting all the java code simultaneously running in background.(The java class whose object is made in JSP calls webservices and this may take time, meanwhile i want user should start inputing in the form fields).But user cannot see any form fields until the whole Java code has executed.
KINDLY HELP!

You can display a page first and then to load other content through Ajax.

Parse javascript generated content using Java

http://support.xbox.com/en-us/contact-us uses javascript to create some lists. I want to be able to parse these lists for their text. So for the above page I want to return the following:
Billing and Subscriptions
Xbox 360
Xbox LIVE
Kinect
Apps
Games
I was trying to use JSoup for a while before noticing it was generated using javascript. I have no idea how to go about parsing a page for its javascript generated content.
Where do I begin?

You'll want to use an HTML+JavaScript library like Cobra. It'll parse the DOM elements in the HTML as well as apply any DOM changes caused by JavaScript.

you could always import the whole page and then perform a string separator on the page (using return, etc) and look for the string containing the information, then return the string you want and pull pieces out of that string. That is the dirty way of doing it, not sure if there is a clean way to do it.

I don't think that text is generated by javascript... If I disable javascript those options can be found inside the html at this location (a jquery selector just because it was easier to hand-write than figuring out the xpath without javascript enabled :))
'div#ShellNavigationBar ul.NavigationElements li ul li a'
Regardless in direct answer to your query, you'd have to evaluate the javascript within the scope of the document, which I expect would be rather complex in Java. You'd have more luck identifying the javascript file generating the relevant content and just parsing that directly.

How can I send a newsletter with xPages content?

I have some content displayed using computed fields inside a repeat in my xpage.
I now need to be able to send out a newsletter (by email) every week with the content of this repeat. The content can be both plain text and html
My site is also translated into different languages so I need the code to be able to specify the language and return the content in that language.
I am thinking about creating a scheduled lotusscript or java agent that somehow read the content of the repeat. is this possible? if so, some sample code to get me started would be great
edit: the content is only available to logged in users
thanks
Thomas

Use a java agent, and instead of going to the content natively, do a web page open and open the page as if in a browser, then process the result. (you could make a special version of the web page that hides all extraneous content as well if you wanted)

How is the data for the repeat evaluated? Can it be translated in to a lotusscript database.search?
If so then it would be best to forget about the actual xPage and concentrate on working out how to get the same data via LotusScript and then write your scheduled agent to loop through the document collection and generate the email that way.
Looking to the Xpage would generate a lot of extra work, you need to be authenticated as the user ( if the data in the repeat is different from one user to the next ) to get the exact same data that this particular user would see and then you have to parse the page to extract the data.

If you have a complicated enough newsletter that you want to do an Xpage and not build the html yourself in the agent, what you could do is build a single xpage that changes what's rendered based on a special query string, then in your agent get the html from a URLConnection and pass the html into the body of your email.
You could build the URL based on a view that shows documents with today's date.

I would solve this by giving the user a teaser on what to read and give them a link to the full content.

You should check out Weihang Chens (my colleague) article about rendering an xPage as Mime and sending it as a mail.
http://www.bleedyellow.com/blogs/weihang/entry/render_a_xpages_programmtically_and_send_it_as_a_mail?lang=en_us
We got this working in house and it is very convenient.
He describes 3 different approaches to the problem.

How do you access URL text following the # sign through Java?

Using Java (.jsp or whatever) is there a way where I can send a request for this page:
http://www.mystore.com/store/shelf.jsp?category=mens#page=2
and have the Java code parse the URL and see the #page=2 and respond accordingly?
Basically, I'm looking for the Java code that allows me to access the characters following the hash tag.
The reason I'm doing this is that I want to load subsequent pages via AJAX (on my shelf) and then allow the user to copy and paste the URL and send it to a friend. Without the ability of Java being able to read the characters following the hash tag I'm uncertain as to how I would manipulate the URL with Javascript in a way that the server would be able to also read without causing the page to re-load.
I'm having trouble even figuring out how to access/see the entire URL (http://www.mystore.com/store/shelf.jsp?category=mens#page=2) from within my Java code...

You can't.
The fragment identifier is only used client side, so it isn't sent to the server.
You have to parse it out with JavaScript, and then run your Ajax routines.
If you are loading entire pages (and just leaving some navigation and branding behind) then it almost certainly isn't worth using Ajax for this in the first place. Regular links work better.

Why can't you use a URL like this:
http://www.mystore.com/store/shelf.jsp?category=mens&page=2
If you want the data to be stored in the url, it's gotta be in the query string.