How to write action class in struts 2 interceptor

How to write action class in struts 2 interceptor

Struts2 Interceptor Example Project configuration Files web. ActionSupport; import com. This is to make sure Sturts2 calls all the default interceptors as well while calling our custom interceptor. Result Pages login. Here, we are defining the custom interceptor by upper. ActionInvocation; import com. Also it will prints the Action class name and execution time of action in milliseconds. Today we will explorer the world of Interceptors in Struts2. SessionAware; import com. In our example application there is a package node in struts.

This is to make sure Sturts2 calls all the default interceptors as well while calling our custom interceptor. Interceptors can alter the workflow of action.

Prepare interceptor in struts2 example

Please feel free to add your application logic in appropriate methods. TestAction Please click below link to download the source code of this project. They are invoked by the controller before and after invoking action, thus they sits between the controller and action. For example, in the above case, exception will be executed first, second would be servlet-config and so on. ActionInvocation; import com. Notice that LoginAction is not implementing UserAware interface. Each interceptors are called before the action gets called. An interceptor is a class whose pre-defined method is called each time, a configured server resource is accessed. After calling action: net. We will use the timer interceptor whose purpose is to measure how long it took to execute an action method. Summary Interceptors provide the Struts 2 framework with both power and flexibility. The invoke method of ActionInvocation returns the information of next resource.

On the Interceptors web page in the Struts 2 documentation are a list of interceptors that come with the Struts 2 framework and what the name value is for each interceptor. Please feel free to add your application logic in appropriate methods.

Post-Processing Stacking Multiple Interceptors As you can imagine, having to configure multiple interceptor for each action would quickly become extremely unmanageable. Once the action is called and result is generated, each interceptors are again called in reverse order to perform post processing work.

Params interceptor in struts2

Result Pages login. Also we may want to apply the custom interceptor stack to only certain actions. The set method of ValueStack sets the name property by the specified value. Framework creates an object of ActionInvocation that encapsulates the action and all the interceptors configured for that action. Interceptors are the power of Struts 2 framework that plays a crucial role in achieving high level of separation of concerns. The Struts Writing Interceptors guide explains how to do this. We can create our own custom Interceptors and plugin into a Struts2 based web application. To do so, we must add interceptor-ref tag in action. You can call same interceptor with the different actions. InterceptorRef; import org. Here bottom line is being generated because of timer interceptor which is telling that action took total ms to be executed. We will use the timer interceptor whose purpose is to measure how long it took to execute an action method. Before calling action: net. In the next part we will see Struts2 File Upload Example.

They are invoked by the controller before and after invoking action, thus they sits between the controller and action. If you are not logged in and you will try to invoke login.

struts2 action class without execute method

ActionInvocation; import com. One by one Intercetors are applied before calling the Action.

interceptor in struts2 for login

This is the method responsible for calling the next interceptor or the action. This is to make sure Sturts2 calls all the default interceptors as well while calling our custom interceptor.

custom interceptor in struts2

The example code for this tutorial, interceptors, is available at struts-examples Introduction So far our tutorials have not delved into the inner workings of the Struts 2 framework.

Interceptor interface.

This file will serve as the initial action URL where a user can click to tell the Struts 2 framework to call the a defined method of the HelloWorldAction class and render the HelloWorld. When we execute above project, we get following response pages. Here, we are defining the custom interceptor by upper. Defining interceptors for a package includes several steps and we need to define them with interceptors, interceptor, interceptor-stack and default-interceptor-ref elements. Interceptors are responsible for most of the request processing. It can help you in applying multiple interceptors in one go. Each interceptors are called before the action gets called.
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Struts 2 Interceptor Example