Using Chatter in Apex
Although Chatter data is accessible in Apex using SOQL queries, Chatter in Apex provides a simpler solution. It consists of a series of Apex classes called ConnectApi that expose Chatter features in a simpler way, as an API rather than a data model. With Chatter in Apex, Chatter data is preformatted for display, and many features can be accessed with a single method call. Using the data model is typically not as easy or concise.
Note
For more information about Chatter in Apex, visit the online documentation at http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_classes_connect_api.htm.
Listing 12.13 and Listing 12.14 are the Visualforce controller and page to display the current user’s feed items and comments. ...
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