Modern Java: Stream Gatherers & Scalable Concurrency

Modern Java Stream Gatherers, Virtual Threads, Advanced Concurrency and High-Throughput Scalable I/O Processing

What you’ll learn
Build advanced data pipelines using the new Stream Gatherers API in Java
Write stateless and stateful gatherers to control stream flow with custom logic
Integrate Virtual Threads for highly scalable I/O-bound processing
Design non-blocking concurrent gatherers that emit results as they complete
Control concurrency levels to avoid overload using concurrency-limiting gatherers
Handle errors gracefully without disrupting the stream using delay error patterns
Implement nested concurrency in a structured and maintainable way
Improve performance and memory usage with stream-first design and no intermediate collections

Requirements
Familiarity with Java Virtual Threads is recommended. If you are new to Virtual Threads, consider checking out my companion course on the topic for a solid foundation.

Description
Prerequisite: Familiarity with Java Virtual Threads is recommended. If you are new to Virtual Threads, consider checking out my companion course on the topic for a solid foundation.This in-depth course is designed for experienced Java developers looking to master the cutting-edge Stream Gatherers API and unlock the full potential of Virtual Threads for building high-performance, scalable applications.Java has evolved, and so have its concurrency tools. With the introduction of Stream Gatherers and Virtual Threads, you can now write efficient, readable, and scalable I/O pipelines using familiar Stream constructs. This course is practical, modern, and tailored to help you build real-world, concurrent Java applications without the traditional complexity of thread management.What You Will LearnUnderstand how Stream Gatherers enhance the Java Stream APIMaster Stateless Gatherers using integrators for simple yet powerful stream transformationsBuild Stateful Gatherers using initializers for scenarios that require shared or evolving contextImplement Finisher logic for end-of-stream aggregation, cleanup, or final state transformationExplore Combiners and their role in parallel stream executionDeep-dive into built-in gatherers and learn when and how to use them effectivelyWrite your own custom gatherers to unlock advanced stream patternsUse Virtual Threads to handle high-volume I/O-bound tasks with minimal overheadDesign Concurrent Gatherers that:Execute and emit resultsSupport Concurrency Limits to avoid resource exhaustionHandle errors without blocking other operations (e.g. Delay Error pattern)Allow Nested Concurrent Processing for multi-stage, multi-level pipelinesBuild a Massive I/O Stream Pipeline project using Stream Gatherers + Virtual ThreadsIngest 150K+ API calls efficiently with lightweight concurrencyAvoid intermediate collection for better throughput and memory efficiencySave data with batched writes and stream-friendly persistenceWhy Take This Course?Many developers avoid writing high-concurrency code because of complexity and fear of resource management. This course changes that by using Stream Gatherers and Virtual Threads to simplify the process.You will learn how to think in terms of composable data pipelines rather than low-level threads or futures. The examples and patterns you build will help you tackle real I/O-heavy use cases with confidence and performance.

Who this course is for
Experienced Java Developers: Those already comfortable with Java fundamentals, including Streams, Lambdas, and core concurrency concepts.
Modern Java Adopters: Developers keen on leveraging the latest features of Java
Architects & Team Leads: Individuals responsible for designing resilient, performant, and scalable Java architectures.

https://www.udemy.com/course/java-stream-gatherers/