Liferay 6.1: Documents And Media CMIS: Integrating External Repository

Adding repositories in Documents and Media portlet is a new. Documents and Media allows to connect to multiple third-party repositories that support CMIS 1.0 via AtomPUB or Web Services protocols.
To add new repositories from the web click the Add button from the Home folder. Repositories can only be mounted in the Home folder.
Need to make sure that same credentials are being used  in liferay and external repository for authentications. In order to authenticate and make it working you need to enable the following in portal.properties.
session.store.password=false

company.security.auth.type=screenName

Example 

1. External Repository is Alfresco 4.
2. Once the  Liferay and Alfresco are up and working either both on same tomcat or separate (i have deployed on same tomcat).
3. Goto Document and Media portlet >> Click on Add >> select "Repository"
4. Enter Name, Description.
5. Select type as Atompub.
6. For AtomPub URL enter "http://localhost:8080/alfresco/service/cmis" and click Save.
7. You will see a new entry on left side and now you will be able to browse and search the Alfresco repository.

Environment:

References:

• • User guide of http://www.liferay.com
  • http://www.liferay.com/es/community/wiki/-/wiki/Main/CMIS+Repository#section-CMIS+Repository-Mounting+a+Repository
  
  

Organizations or Communities, which one should I use?

The concept of Organization, Community, groups have been extended in Liferay 6.1, providing a greater flexibility and customization. Below is the link from Liferay official site which explains this in a simple yet practical manner.
Organizations or Communities, which one should I use? The final answer

Liferay: Disable portlet border

Aim: Disable border for all portlets

Solution:

The easiest way to do this is using theme. Open liferay-look-and-feel.xml  add to it below line to achieve the purpose by default for all portlets.

<theme id="myTheme" name="myTheme">
       <settings>
            <setting key="portlet-setup-show-borders-default" value="false" />
        </settings>
</theme>

Liferay: Inter portlet service access

Liferay: Invoke a servlet from portlet

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.