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Exposing GreetingServiceImpl as web service

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posted 12 years ago

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Hi all,

Problem scenario is: I am writing a Google Gadget. Data presented in the gadget will come from my deployed gwt app. I am planing to call the web service from JS to show the required data.

I need to know how I can expose the Service implementation class like GreetingServiceImpl(generated by default as sample in Eclipse GWT project) as web service.

Regards,
Vikram

Vikram PracLabs

Maneesh Godbole

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posted 12 years ago

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You can use something like this

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Vikram Kohli

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posted 12 years ago

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Thanks Maneesh. Will explore on that.

Regards,
Vikram

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Vikram Kohli

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posted 12 years ago

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Approach suggested http://code.google.com/p/gwtrpccommlayer/ will not work as, it is meant for the the consumption from java based client. Where as I am trying to invoke the web service through Java Script.

I either need to expose GreetingServiceImpl as a SOAP web service or as a REST full web service. I followed the tutorial given here. But instead of creating the Dynamic Web Project, I am trying this in the GWT project it self. But its giving the 404 error.

here is the code.

Servlet declaration in web.xml

And finally I HTML, having java script code to call the above service

<head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <script language="javascript">
    var xmlhttp;
    function init() {
       // put more code here in case you are concerned about browsers that do not provide XMLHttpRequest object directly
       xmlhttp = new XMLHttpRequest();
    }
    function getdetails() {
        var empno = document.getElementById("empno");
        var url = "http://127.0.0.1:8888/Test/resources/employee?empno=1";
        xmlhttp.open('GET',url,true);
        xmlhttp.send(null);
        xmlhttp.onreadystatechange = function() {

Can anyone please give pointer on how can I solve this problem

Vikram PracLabs

Vikram Kohli

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posted 12 years ago

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Guys need help...

Please provide input, or there is any other way around to expose the logic written in the Service implementation class . I need to develope a Google Gadget/Wordpress Widget, and it needs data from my GWT app, how I can achieve this?

Thanks & Regards,
Vikram

Vikram PracLabs

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