Using Queues to Apply the Asynchronous Approach in Your Application

In the previous chapter, we saw how delegating some tasks to external functions in the controller while creating the HTTP request can have a positive impact from a performance perspective. However, the case analyzed in the previous chapter was limited to a scoped topic: querying the database and populating the cache. This strategy is also known as the cache-only strategy. The process only needs the data to be retrieved from the cache.

This type of approach works in a case where information needs to be retrieved from a data source. Typically, applications are more complex than this, such as when executing specific tasks that need to modify and process data.

Think about a scenario where there is a request that starts a backup process. Typically, a backup process takes time to be completed. Implementing a synchronous approach means that the controller (who serves the request) keeps the client (the web page) on hold...