What is Action bird inwards Struts
Struts inwards coffee is a framework, used to brand spider web application its is based on Model View Controller or MVC design Pattern where Model stand upwards for the internal solid soil in addition to activity used to modify the solid soil persuasion stand upwards for presentation cistron in addition to a controller is responsible for receiving the asking from the customer in addition to orbit upwards one's hear which describe organisation logic should move called. Basically, Struts bring dissimilar classes to stand upwards for this Model, View, in addition to Controller nosotros telephone telephone them every bit Action, Action Form, in addition to Action Servlet. So
Model – Action classes
View - Action shape classes
Controller – Action Servlet classes
In this article, nosotros are focusing on the Model layer of struts framework. Action bird is used to furnish an interface to application model layer. What is Action bird in addition to how to role Action bird is too a pop Struts interview Question asked inwards diverse J2EE interviews.
What is Action Class inwards Struts ?
Action Class inwards Struts framework is used to define the describe organisation logic it handles the customer asking gear upwards the response or say where the response should move forward, basically its have the information from the persuasion layer in addition to forrard that information to specific describe organisation layer or procedure the information in addition to i time again forrard the processed information to persuasion layer. For example, Action bird tin flame orbit a library object add together books to that library object, it tin flame shop selected books yesteryear a specific reader to the session.
In brief, nosotros tin flame depict Action as:
Ø Our Action bird is extended yesteryear “org.apache.struts.action.Action class”.
Ø We demand to override execute() method of Action class.
Ø Action servlet pick out Action bird for incoming HTTP Request defined nether the activity mapping tag inwards struts-config.xml file
Ø Action bird is used to invoke describe organisation or information access logic larn information from edible bean in addition to shop processed information to edible bean in addition to render number or errors depending on the situation,
Ø Action classes are multi-threaded in addition to then nosotros demand to carefully grip the activity variable every bit they are non thread-safe when working alongside the multi-threaded environment.
How to Use Action Class
In unproblematic steps, nosotros volition run across how to role Action class.
1. First extend the org.apache.struts.action.Action class.
2. Override the next method
world ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws IOException, ServletException
Here nosotros educate our describe organisation logic in addition to gear upwards the response to render the client.
3.Then nosotros configure this activity to struts config file of our application within activity mapping :
<action-mappings>
<action
path="/TestAction"
type="Example.TestAction">
<forward name="success" path="/ExamplePages/TestAction.jsp"/>
</action>
</action-mappings>
This is all close the activity bird inwards side yesteryear side article volition bargain alongside dissimilar type of activity bird provided by struts framework.
Further Learning
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