HtmlUnit Session Management

Question

I'm trying to login to Facebook page using HtmlUnit and view its HTML content. I'm trying to fill up the login credentials through HtmlUnit but I don't see the session being carried when the submit button is clicked.

Couldnt find much content on htmlunit session management classes. I have also attached the code that I'm currently using to attempt this problem. Any help appreciated!

WebClient webClient = new WebClient();
HtmlPage page1 = webClient.getPage("https://www.facebook.com");
List<HtmlForm> listF = page1.getForms();
HtmlForm form = null;
for(int i=0; i<listF.size(); i++)
{
    if(listF.get(i).getId().equals("login_form"))
    {
        form = listF.get(i);
        }
}
HtmlTextInput uName = form.getInputByName("email");
HtmlPasswordInput passWord = form.getInputByName("pass");
HtmlSubmitInput button = form.getInputByValue("Log In");
uName.setValueAttribute(FACEBOOK_UNAME);
passWord.setValueAttribute(FACEBOOK_PASS);
HtmlPage page2 = button.click();

Answer 1

Found the answer. Just enabled cookies before starting to get webpages. It works. Added the below piece of code

WebClient webClient = new WebClient();
CookieManager cookieMan = new CookieManager();
cookieMan = webClient.getCookieManager();
cookieMan.setCookiesEnabled(true);