What is session in Struts 2?
What is session in Struts 2?
Introduction. Your Struts 2 application may need to access the HTTP session object. Struts 2 provides an interface, SessionAware, that your Action class should implement to obtain a reference to the HTTP session object.
What is the action class in Struts 2?
Plain Old Java Object
In struts 2, action class is POJO (Plain Old Java Object). POJO means you are not forced to implement any interface or extend any class.
What are the aware interfaces in Struts 2?
The four aware interfaces are:
- apache. struts2. interceptor. SessionAware.
- apache. struts2. util. ServletContextAware.
- apache. struts2. interceptor. ServletRequestAware.
- apache. struts2. interceptor. ServletResponseAware.
What is Session map in Java?
The SessionMap is specifically designed for the purposes if you want to have access to the servlet session attributes. So, the user is able to keep a synchronized collection of objects in session and use it instead of HttpSession directly.
Which servlet does the Struts framework use?
Overview of the Application When you use Struts, the framework provides you with a controller servlet, ActionServlet , which is defined in the Struts libraries that are included in the IDE, and which is automatically registered in the web.
How does Struts 2 validation work?
Struts Action 2 relies on a validation framework provided by XWork to enable the application of input validation rules to your Actions before they are executed. Struts2 Validation Framework allows us to separate the validation logic from actual Java/JSP code, where it can be reviewed and easily modified later.
What is execute method in Struts 2?
If you examine class HelloWorldAction from tutorial Using Struts 2 Tags you’ll see that it extends the class ActionSupport and then overrides method execute . The method execute is where we placed what we want this controller to do in response to the hello. action . Method execute of HelloWorldAction.
Is Struts2 thread safe?
yes it is thread safe.
How does session work java?
Sessions are server-side entities that store information (in memory or persisted) that spans multiple requests/responses between the server and the client. The Servlet HTTP session uses a cookie with the name JSESSIONID and a value that identifies the session.
How does struts2 integrate with Spring?
You need to follow following steps:
- Create struts2 application and add spring jar files.
- In web. xml file, define ContextLoaderListener class.
- In struts. xml file, define bean name for the action class.
- In applicationContext. xml file, create the bean.
- In the action class, define extra property e.g. message.
What is sessionmap in Struts2?
The struts 2 framework passes the instance of org.apache.struts2.dispatcher.SessionMap. It extends the java.util.AbstractMap class which implements the java.util.Map.SessionMap.
What is action in Struts 2?
Struts 2 – Actions. Actions are the core of the Struts2 framework, as they are for any MVC (Model View Controller) framework. Each URL is mapped to a specific action, which provides the processing logic which is necessary to service the request from the user. But the action also serves in two other important capacities.
How many methods does setsession have in Struts2?
It contains only one method setSession. struts framework calls this method by passing the instance of SessionMap class. The struts 2 framework passes the instance of org.apache.struts2.dispatcher.SessionMap.