Liferay

Liferay Hook development
http://learntolead-liferay.blogspot.co.uk/2012/07/liferay-hook-4-custom-action-prelogin.html

IBM TAM SSO with Liferay
http://www.khau-tech.com/2012/11/19/ibm-tivoli-access-manager-sso-with-liferay/


Which Action class to use to extend the action behaviour
*************************************************
https://www.liferay.com/community/wiki/-/wiki/Main/Struts+Action+Hook+Tips?_36_pageResourcePrimKey=21386817

SPRING MVC Liferay Portlet
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http://www.opensource-techblog.com/2012/09/spring-mvc-portlet-in-liferay.html

Some handy Unix/Linux commands

To find a process with specific string and then kill a series of such processes.
-------------------------------------
kill -9 `ps -ef | grep <string> | grep -v grep | awk '{print $2}'`


Make a file void / empty
------------------------------------
cat /dev/null > abc.txt


Super duper command to remove cache/page cache from Linux
---------------------------------------------------------------------------------------
free && sync && echo 3 > /proc/sys/vm/drop_caches && free

More on this refer...
http://unix.stackexchange.com/questions/87908/how-do-you-empty-the-buffers-and-cache-on-a-linux-system


 

Liferay 6.2 - Installations - LDAP integration

Liferay 6.2 - LDAP Integration
*****************************

Liferay 6.2 has no properties files ! Which were there until previous version. I guess now these are part of database tables.

So, while I was trying to integrate my server with LDAP server (TDS) I could configure the LDAP using the Control panel of liferay. And server was able to connect to LDAP.

But due to some issue I was not able to login using any of my ldap users or the default portal user. I was not able to login to the portal.

In earlier version there was a property file named, portal-ext.properties which used to hold those ldap specific values. But this doesnt exist in Liferay 6.2.

While looking at database ( portal database ), I found a table named portalpreferences, which has those ldap properties.

SELECT preferences FROM lportal.portalpreferences where portalPreferencesId = 10160


So, I changed the values of the parameters,
ldap.auth.enabled and ldap.auth.enabled ( which are two check boxes on the LDAP configuration page needs to be checked to enable LDAP login ) to false.

And that's it.

It worked for me, hope it helps you. This is still work under progress and I am looking to complete this LDAP connectivity with Liferay 6.2. So will keep updating this post.

https://www.liferay.com/documentation/liferay-portal/6.2/user-guide/-/ai/integrating-existing-users-into-liferay-liferay-portal-6-2-user-guide-17-en

WebSphere Portal - Authoring Template - Ephox error IWKAP0009E: Servlet not enabled.

We upgraded our portal server to use the latest Ephox editor because the old version was giving logs of Java Security errors.

We applied the fix pack (? - will add exact number later ! ).

And restarted the server but was getting strange error while clicking on "New" button in WCM. On click it will show "IWKAP0009E: Servlet not enabled."

After googling came across this article which is exactly the problem we had and it we resolved following it...

http://www-01.ibm.com/support/docview.wss?uid=swg21445801

Another tech note which also suggests to do the same thing...

https://www.ibm.com/developerworks/mydeveloperworks/blogs/WCML2Thoughts/?lang=en

What is difference between SSL & SSH - SSL & TSL

Good explanation 
http://yet.another.linux-nerd.com/blog/difference-between-ssh-and-ssl

A bit of discussion
http://stackoverflow.com/questions/723152/difference-between-ssh-and-ssl

Some more such acronyms...
http://www.rebex.net/kb/secure-ftp/default.aspx


Good information on SSL Vs TSL ( Very interesting to understand Poodle vulnerability ! )
https://luxsci.com/blog/ssl-versus-tls-whats-the-difference.html


http://www.sans.org/reading-room/whitepapers/protocols/ssl-tls-beginners-guide-1029

SSL - Mutual Authentication
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http://www.codeproject.com/Articles/326574/An-Introduction-to-Mutual-SSL-Authentication

Aggregation Vs Composition - OOD Concept

I have a very basic example to understand aggregation / composition.

And over a time, thinking about from somewhere I have found a very profound example to explain both concept.

Composition - A composition in which objects forms an entity and that entity cant remain complete if one of the object is removed.

Example : To understand composition, think of a medicinal tablet, which might be made of many elements in various proposition but you cant remove one easily and if you remove one it's wont be same tablet / medicine anymore.

Aggregation - A collection of objects which are loosely connected and can be easily replaces / removed and can be used separately and can be modified easily.

Example : There can be many but I think a car is best one ! One can modify anything in car / replace objects. One can change tire / change color, change wipers / even change engines. And still car will work ! And everything is so loosely coupled that it can be changed easily.

Websphere Virtual Portal - Modify for Virtual Host Name

http://www-10.lotus.com/ldd/portalwiki.nsf/xpDocViewer.xsp?lookupName=IBM+WebSphere+Portal+7+Product+Documentation#action=openDocument&res_title=Virtual_portals_reference_wp7&content=pdcontent

Using a new host name for an existing virtual portal.

If you want to use a new host name for an existing virtual portal, proceed by the following steps:

Export the contents of the virtual portal by using the XML configuration interface.                                 

/opt/IBM/PortalServer/bin/xmlaccess.sh -in Export.xml -user wpadmin -pwd xxxxx -url http://localhost:<portalPortalNumber>/<yourportalContext>/config/<yourVPContext> -out ExportVP_out.xml

 

Delete the virtual portal.

Clean up references to the deleted virtual portal by using the Task.xml script of the XML configuration interface.

Create a new empty virtual portal by using the configuration task create-virtual-portal. Use the context of the deleted virtual portal, and specify the new host name as required.

Import the contents to the new virtual portal by using the XML configuration interface.

 ----------------------------
  [wsadmin] VirtualPortal:
  [wsadmin] Title:       Institutions
  [wsadmin] Description:
  [wsadmin] Realm:       defaultWIMFileBasedRealm
  [wsadmin] Object ID:   Z18_K99SEH6510KN80IF6GO7973481
  [wsadmin] Hostname:    <cannot be retrieved>
  [wsadmin] Context:     institutions
  [wsadmin] Short ID:    -14001
  [wsadmin] _____________________________________________________