Explore gRPC fundamentals and its integration with Spring in this conference talk from Spring I/O 2016. Dive into the high-performance, open-source RPC framework designed for mobile and HTTP/2, learning about its efficiency, low latency, and ability to create massively distributed systems. Discover gRPC's streaming API capabilities, including server-side, client-side, and bidirectional streaming, enabling the development of sophisticated real-time applications. Gain insights into integrating gRPC with Maven, Gradle, Spring Boot, and RxJava through code demonstrations and practical examples. Learn to write a Spring Boot starter for running a gRPC server, configure projects to generate gRPC stub code, and integrate with RxJava's observable sequences. The talk covers key topics such as Kubernetes, microservices, Stubby RPC, gRPC technology, gRPC vs REST, creating and implementing gRPC servers, error handling, and bidirectional streaming for chat applications.