Today we will discuss about Struts Action hook.By using Struts Action hook we can achieve two things:-
1)Overriding existing struts Action
2)Add new Struts Action
Today we will discuss about Overriding existing struts Action. Every time you login a Struts Action is called.Struts use a file called struts-config.xml you can find this file inside WEB-INF .
For overriding Struts Action your custom class must extend BaseStrutsPortletAction which implements StrutsPortletAction which contain processAction().
So Lets start step by step:-
Step 1:-Create Liferay hook project
File-->New-->Liferay Plugin Project-->Provide name-->Select hook in plugin type-->Finish.
You can see snapshot in my previous article (Step 1) Portal Properties Hook in Liferay.
Step 2:-Create Action Path
Open Struts-config.xml (\webapps\ROOT\WEB-INF) and search for login action you will find entries as:-
struts-config.xml
As you can see path "/login/login" goes to "LoginAction" Class. We change this class to our Custom class.So just provide those entries in liferay-hook.xml as:-
liferay-hook.xml
Step 3:-Create Action Class
Inside "docroot/WEB-INF/src" create package com.test and create a class with name MyCustomAction as:
MyCustomAction.java
Explanation:-
Here we create our processAction() and inside this method we call the original processAction() so that flow of liferay not break.In place of SOP you can write your own logic.Similarly for render().
Step 4:-Check Output
Deploy your hook and hit localhost:8080 and then press SignIn button on the top right.Your eclipse console shows:-
My Custom Render Method is Called
Then fill the values in login form and press Sign In
Your eclipse console shows:-
My Custom Process Action Method is Called
Project Structure
You can Download Source code from Override Struts Action Hook in Liferay
Hope this will Help....
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