To add the review date to the search index for web content, what is the recommended action?

The recommended action to add the review date to the search index for web content is to create a hook plugin to implement an indexer post processor. This approach involves extending the existing indexing framework without altering the core codebase, which is a best practice in Liferay development.

By utilizing an indexer post processor, developers can intercept the indexing process after the standard indexer has completed its task. This allows for additional properties, such as the review date, to be added seamlessly to the index. This method is advantageous because it keeps the solution modular and maintainable. It also aligns well with Liferay’s architecture, which favors the use of hooks and post processors to customize behavior rather than direct modifications.

In contrast, creating an Ext plugin to overwrite the Journal indexer directly alters the core functionality, which is generally discouraged as it can lead to maintenance challenges during upgrades. Overriding the Journal service with a hook plugin or modifying the edit article Struts action can introduce unnecessary complexity or may not directly address the need to augment the indexing process efficiently. Thus, the choice to implement an indexer post processor is the most effective and recommended solution.