gistfile1.java

@GET
    @Produces({"application/atom+xml"})
    public Response getChannelPermission (@PathParam(ACCOUNT_ELEMENT) String accountId) {
    	final Feed feed = generateChannelAtomFeed(accountId);
    	
    	StreamingOutput s = new StreamingOutput() {
			@Override
			public void write(OutputStream output) throws IOException,
					WebApplicationException {
				XmlWriter writer = new XmlWriter(new OutputStreamWriter(output));
				feed.generateAtom(writer, new ExtensionProfile());
				
			}
		};
    	
		Response.ResponseBuilder builder = Response.ok(s);
		builder.header("ETag", "fjahsjghakjhgkajhdgjkhag");
		Response r = builder.build();
		
        return r;
    }