GWT javascript client side RPC Call

Question

Greetings, I'm currently developing a web application with Google Web
Toolkit. Basically i need to call a RPC from GWT from the client side,
in order to get some kind of data.
I've been currently searching and I've found JSNI which can write
javascript code in the java, but i can't seem to get it work the right
way.
Thank you in advance.

Answer 1

Steve,
Webflow is a server side technology. The only way to affect the invocation of
webflow from the client side is to change the origin and event parameters sent
to the webflow engine. These parameters must be passed via a request. There simply
is no way to interact with the webflow engine without a request/response.
OK, you may be able to hack something together using an Applet, RMI, and by using
internal webflow APIs. But you don't want to do that; that's not really an option.
Is there a way to call javascript methods
from BEA's tag libs? No.
Do I need to write my own tags and make
references to the objects that are used for webflow?I assume you mean that you would create custom JSP tags that would invoke directly
IPs and PCs. This would not accomplish what you want and would defeat the webflow
architecture.
Here is what you can do:
1) you could create your own custom JSP taglib that would insert JavaScript into
the HTML form along with the <input> tag. I don't know how hard this would be.
2) you could forget about using JSP tags, and simply use a JavaScript library.
You would need to code your HTML properly to use this technique. I did a search
on www.google.com and found a good article on exactly how to do this:
http://www.zdnet.com/devhead/stories/articles/0,4413,2326270,00.html
Post back if you have more questions.
PJL
Steve Lewis <[email protected]> wrote:
Okay, webflow is cool and all, but I'd like to be able to do both client-side
and server-side validation. Server-side is taken care of with the InputProcessors,
but there's not a way to do onSubmit or onChange using the proprietary
webflow tags.
Question: How do I do this? Do I need to write my own tags and make
references to the objects that are used for webflow?
I'd really like to be able to encapsulate all this at once.
Maybe I just need to ask this: is there a way to call javascript methods
from BEA's tag libs? Maybe there's a trick I don't know.
Thanks,
Steve Lewis
CTI, Inc.