Which component is primarily responsible for resource routing and handling in AEM?

The component primarily responsible for resource routing and handling in AEM is Apache Sling. Sling acts as a web framework that facilitates the mapping of HTTP requests to content resources based on the resource's URL. It simplifies the way developers interact with content stored in the Java Content Repository (JCR) by allowing them to define how URLs should be handled and which resources they correspond to.

Apache Sling uses a resource-oriented architecture that treats everything as a resource, which plays a crucial role in delivering content dynamically based on the requests that come in. This flexibility enables developers to build applications that are responsive to changes in the underlying content structure without requiring extensive reconfiguration or changes in the application architecture.

Other components like OSGi, JCR, and Dispatcher serve different functions within the Adobe Experience Manager ecosystem. OSGi is primarily concerned with modular application development and managing the lifecycle of bundles in AEM. The JCR (Java Content Repository) is focused on content storage and retrieval, while the Dispatcher is mainly used as a caching and load balancing tool to optimize web delivery and improve performance. Each of these components contributes to AEM's functionality but does not specifically handle the resource routing and request mapping as Apache Sling does.