What are Interceptors in SAP Hybris? How many types of Intercepter exist in SAP Hybris?

What are Interceptors in SAP Hybris? 

In SAP Hybris, interceptors are an important feature of the platform that enable you to modify the behavior of certain actions or events in the system. Interceptors are essentially Java classes that are configured to intercept and modify certain operations in the system.

Interceptors are used to implement cross-cutting concerns, such as logging, security, and performance monitoring. They allow you to add functionality to the system without modifying the existing codebase. Instead, interceptors are configured to intercept specific operations, and the functionality is added by modifying the interceptor code.

How many types of Intercepter exist in SAP Hybris?

There are several types of interceptors in SAP Hybris, including:

Before interceptor: This type of interceptor is executed before the main operation and can modify the input parameters or cancel the operation altogether.

After interceptor: This type of interceptor is executed after the main operation and can modify the output parameters or handle exceptions that occurred during the operation.

Around interceptor: This type of interceptor wraps around the main operation and can modify both input and output parameters.

Interceptors are an important aspect of SAP Hybris and can be used to customize and extend the platform's functionality to meet specific business requirements.

SAMPLE CODE :-

public class MyBeforeInterceptor implements Interceptor {

    @Override

    public void beforeInterception(final Context ctx, final InterceptorContext interceptorContext) throws InterceptorException {

        // Do something before the main operation

        System.out.println("Before interceptor executed");

    }

}

In this example, we have defined a before interceptor called MyBeforeInterceptor. This interceptor implements the Interceptor interface and overrides the beforeInterception method, which is called before the main operation.

Inside the beforeInterception method, we can add any logic that we want to execute before the main operation. In this case, we simply print a message to the console.

To use this interceptor, we need to configure it in the interceptor.xml file, like this:

<bean id="myBeforeInterceptor" class="com.example.MyBeforeInterceptor"/>

<interceptor name="myInterceptorChain" default="true">

    <before>

        <bean class="com.example.MyBeforeInterceptor"/>

    </before>

    <target>

        <!-- Main operation -->

    </target>

    <after>

        <!-- After interceptors -->

    </after>

</interceptor>

In this configuration, we define a bean for our interceptor and then add it to an interceptor chain called myInterceptorChain. The before element specifies that this interceptor should be executed before the main operation.

When the main operation is executed, the interceptor chain is triggered and the beforeInterception method of our interceptor is called before the main operation. We can then add any logic that we want to execute before the main operation