Fatal Issue while writing our own custom provider

[Anish Chaube1]

Hello ,

As a part of my project, I am doing some Prototype development which 
requires custom provider for dojo grid.
I could successfully run my custom provider on WAS 7, but when i deployed 
it on Apache tomcat 6.0.20 even though it is not giving any error. In 
response content is null.

This is the code snapshot of my custom provider :- 

in writeTo method 
.
.
.
//Call back param
String callbackParam = null;
                        try {
                                callbackParam = (String)this.uriInfo
.getQueryParameters().getFirst("callback");
                        }
                        catch (Exception e) {
                                logger.trace("Could not get the URI 
callback param", e);
                        }

                        mediaType = MediaTypeUtils.
setDefaultCharsetOnMediaTypeHeader(map, mediaType);
                        Charset charset = Charset.forName(ProviderUtils.
getCharset(mediaType));
 

                        OutputStreamWriter writer = new 
OutputStreamWriter(outputStream,charset);

                        System.out.println("Call back param "
+callbackParam);
                        if (callbackParam != null) {
                                writer.write(callbackParam);
                        }
                        //writing my json string
                        writer.write(finalJsonString);

                        writer.flush();