To make everything easy and simple we use <a href="http://restfb.com/" target="_blank" class="news_link">restfb (get it 

here)</a>. It is an encapsulation of most of Facebook API. Aside from just posting to walls we also make sure that we 

include an action link. An additional link back to your site. The action link is located beside the standard "like" 

and "comment" links of a post similar to the "Get Bonus" from the graphic below.


<img loading="lazy" src="https://cdn.kahimyang.com/resources/actions.png" border="0" alt="List Facebook friends and groups post to their 

walls with graph API in JSF/PrimeFaces the simple way" />



Here is the important part of a method in our backing bean. It should work with PrimeFaces p:dataGrid. Please note 

that we are using Facebook Graph. We post direct without the Facebook dialog prompt. Let us assume the containing method of the snippet below is called getFacebook() returning List.



<pre class="brush: java">

 .
 .
 .
 
 List list = new ArrayList ();

 try {

 // Link back to your site from a Facebook wall post. 
 // Must be from domain of Facebook app.

 String actionLink = 
 "http://your-domain.com/your-app/Promo.xhtml";

 // scope should be in the permission 
 // of your access_token. 

 actionLink = 
 "http://www.facebook.com/dialog/oauth/?
 client_id=YOUR-APP-ID&"
 + "redirect_uri=" + actionLink + "&"
 + "scope=publish_stream,user_groups,status_update&"
 + "response_type=token";

 // actions in Facebook is a JSON string and should 
 // URL encoded. 

 Map map = new HashMap();
 map.put("name", "Buy Now");
 map.put("link", actionLink);

 DefaultJsonMapper obj = new DefaultJsonMapper();
 String actions = obj.toJson(map);
 actions = java.net.URLEncoder.encode(actions, "UTF-8");


 // We use restfb in communicating with Facebook

 FacebookClient facebookClient = 
 new DefaultFacebookClient(token);

 // Groups

 com.restfb.Connection&lt;Group&gt; gr = 
 facebookClient.fetchConnection
 ("me/groups", Group.class);

 List&lt;Group&gt; g = gr.getData();
 int len = g.size();

 for (int i = 0; i < len; i++) {

 Group G = g.get(i);
 String groupName = G.getName();
 String groupId = G.getId();
 String groupPicture = 
 "http://graph.facebook.com/" + groupId+ "/picture";
 
	 Info info = new Info();

 info.setGroupName (groupName);
	 info.setGroupId (groupId);
 info.setGroupPicture (groupPicture); 
 
 info.setToken(access_token);
 info.setLink("LINK-YOU-ARE-POSING");
 info.setPicture("PICTURE-THAT-GOES-WITH-POST");
 info.setDescription("DESC-OF-POST");
 info.setName("NAME-OF-POST");
 info.setActions(actions);
 info.setId(id);

 list.add(info);

 /*
 Scroll down below on how to use the Facebook
 Feed dialog instead of graph.
 */

 }

 // Access your friends

 com.restfb.Connection&lt;User&gt; my = 
 facebookClient.fetchConnection
 ("me/friends", User.class);
 List&lt;User&gt; u = my.getData();

 // Do same as with groups above, 
 // loop through to update list wit Info objects

 } catch (Exception e) {
 
 // 

 } 

 return list;

 .
 .
 .
 
</pre>




Below is how the p:dataGrid should look like


<pre class="brush: xml">

&lt;p:dataGrid paginator="false" style="width:850px;"
 var="bff" value="#{yourBean.facebook}" 
 columns="6"&gt;

 &lt;p:column&gt;

 &lt;h:commandLink 
 actionListener="#{yourBean.publish}"&gt;
 &lt;h:panelGrid &gt;
 &lt;h:graphicImage value ="#{bff.groupPicture}" /&gt;
 &lt;h:outputText value="#{bff.groupName}" 
 style="font-size:10px;font-weight: bold" /&gt;
 &lt;/h:panelGrid&gt; 

 &lt;f:param name="profileid" value="#{bff.groupId}" /&gt;
 &lt;f:param name="token" value="#{bff.token}" /&gt;
 &lt;f:param name="url" value="#{bff.link}" /&gt;
 &lt;f:param name="picture" value="#{bff.picture}" /&gt;
 &lt;f:param name="desc" value="#{bff.description}" /&gt;
 &lt;f:param name="name" value="#{bff.name}" /&gt;
 &lt;f:param name="actions" value="#{bff.actions}" /&gt;

 &lt;/h:commandLink&gt;
 
 &lt;/p:column&gt;

&lt;/p:dataGrid&gt;


</pre>



Below is the Info class and the publish method. Please note that the publish method is part of our bean not of the Info 

class.

<pre class="brush: java">

 public class Info {
 private String groupName;
 private String groupId;

 public String getGroupName () {
 return groupName;
 }

 public void setGroupName (String s) {
 groupName = s;
 }

 .
 .
 .

 }

</pre>


<pre class="brush: java">

 public void publish (Action event) {

 FacesContext context = FacesContext.getCurrentInstance();
 Map rmap = 
 context.getExternalContext().getRequestParameterMap();
 String token = (String) rmap.get("token");
 String id = (String) rmap.get("profileid");
 String name = (String) rmap.get("name");
 String desc = (String) rmap.get("desc");
 String link = (String) rmap.get("url");
 String picture = (String) rmap.get("picture");
 String actions = (String) rmap.get("actions");

 FacebookClient fbc = new DefaultFacebookClient(token_);

 FacebookType response =
 fbc.publish(id_ + "/feed", FacebookType.class,
 Parameter.with("app_id", "YOUR-APP-ID"),
 Parameter.with("access_token", token),
 Parameter.with("link", link),
 Parameter.with("picture", picture),
 Parameter.with("description", desc),
 Parameter.with("name", name),
 Parameter.with("actions", actions),
 Parameter.with("message", " ")); 

 String mess = response.toString();

 context.addMessage(null, new FacesMessage(mess, ""));

 } 
 

</pre>



<h3>For some reasons that you wanted to post to Facebook through Facebook Feed dialog. Below is how. </h3>



<pre class="brush: java">

 String F = "http://www.facebook.com/dialog/
 feed?app_id=YOUR-APP-ID&" 
 + "redirect_uri=" + YOUR-REDIRECT-URL + "&"
 + "access_token=" + token + "&" 
 + "link=" + url + "&"
 + "picture=" + picture + "&"
 + "description=" + desc + "&"
 + "to=" + id + "&"
 + "name=" + name + "&"
 + "actions=" + actions;
 

</pre>


Set the string above as return value in a method of our Info class, we call that method set/getClick for the sake of this blog. Below is the p:dataGrid 

corresponding to the above change.




<pre class="brush: xml">

 &lt;p:dataGrid paginator="false" style="width:850px;"
 var="bff" value="#{yourBean.facebook}" 
 columns="6"&gt;

 &lt;p:column&gt;

 &lt;h:outputLink value = "#{bff.click}" &gt; 
 &lt;h:panelGrid &gt;
 &lt;h:graphicImage value ="#{bff.groupPicture}" /&gt;
 &lt;h:outputText value="#{bff.groupName}" 
 style="font-size:10px;font-weight: bold" /&gt;
 &lt;/h:panelGrid&gt; 

 &lt;/h:outputLink&gt;
 
 &lt;/p:column&gt;

 &lt;/p:dataGrid&gt;


</pre>





Good luck.

List Facebook friends and groups post to their walls with graph API in JSF/PrimeFaces the simple way