Goal:
To call a servlet from portlet deployed in liferay 6.
Solution:
Step 1: Create a servlet
public class myServlet extends HttpServlet {
public void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println ("inside servlet");
response.sendRedirect(portal_url); //url of portal page
}
}
myServlet.java is a simple servlet class in which service() method serves the purpose of redirecting the control back to portal page. portal_url is the actual absolute URL where the servlet should redirect after processing.
Step 2: Configuring web descriptor
Go to portlet web.xml and make an entry like below:
<servlet>
<servlet-name>myAction</servlet-name>
<servlet-class>com.liferay.portal.kernel.servlet.PortalDelegateServlet</servlet-class>
<init-param>
<param-name>servlet-class</param-name>
<param-value>com.rdg.portlet.myServlet</param-value>
</init-param>
<init-param>
<param-name>sub-context</param-name>
<param-value>myAction</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
In the above web descriptor com.liferay.portal.kernel.servlet.PortalDelegateServlet serves to redirect any request coming to "http://localhost:8080/myAction" to service() method of com.rdg.portlet.myServlet and will redirect back to the liferay portal url.
Step 3: Creating portlet action class to redirect to the servlet
public class myPortletAction extends MVCPortlet {
public void redirectMe(ActionRequest actionRequest,
ActionResponse actionResponse) throws IOException, PortletException {
actionResponse.sendRedirect("http://localhost:8080/myAction");
}
}
So when a form is submitted to the action and control is sent to redirectMe() method, it redirects the request to "http://localhost:8080/myAction" for further processing.
