Portlet Lifecycle

• Portlets are different from servlets in that they have a 2 phase commit. 
• With servlets, the service() method processes all requests. 
• With portlets, the processAction() method processes the requests and the render() method draws the contents of the portlet on the page.

init() 

• Initializes the Portlet 

processAction() 

• process input from a user action. 

render() 

• Renders the content output. 

destroy() 

• Cleans up the portlet 

serveResource() 

• Allows a portlet to serve a resource 
• The serveResource() method can be used to implement AJAX use cases. 

processEvent() 

• Perform events triggered by other portlets. (IPC)