Extending Functional Pipelines with Gatherers

Java’s Stream API has long let you customize the final step of a pipeline via the Collectors interface, but until now there was no way to hook into the intermediate stages. Venkat Subramaniam dives into why you might actually want to do that—adding custom behavior, better metrics, or alternative data flows mid-pipeline.

Enter the new gatherer method and Gatherers interface: a flexible way to plug in your own logic at any point. You’ll learn about the different flavors of gatherers, when each is most useful, and get practical recommendations on which option to choose for your next functional-style project.

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