Rahul Sharma - Cloud-Native Microservices with Apache Pulsar: Build Distributed Messaging Microservices

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Enterprises are adopting containers to replace their legacy applications as part of their digital transformation programs. This strategy results in distributed systems with exceptional flexibility in responding to changing business demands. But building distributed systems requires integrated solutions that can deliver at scale. It has been found that application integration is one of the most critical yet largely concealed requirements of distributed architecture.

According to one Gartner study, integration accounts for about 50% of the time and cost in building modern cloud solutions. Thus, enterprises need next-generation cloud-native integration solutions that are lean, lightweight, secure, fault-tolerant, and can support various integration protocols.

Apache Pulsar is a multitenant, high-performance cloud-native messaging and streaming platform. It offers a large set of out-of-the-box integration options. This book begins by introducing Pulsars architecture. The first few chapters build a foundation of message-driven architecture and explain the setup of all the required Pulsar components. You explore the transform, filter, and resiliency capabilities available in Pulsar. Security is an important aspect of any application, and this book goes over authentication and authorization. The final chapters cover Pulsar deployment in Kubernetes and deploying microservices.

This book is a comprehensive hands-on guide for those who are new to Apache Pulsar. It is intended for experienced software developers who want to build systems using cloud-native technologies. We do not assume any prior knowledge of Apache Pulsar or any other messaging system. The book is not specific to any programming language, even though all examples are covered using the Pulsar Java client library.

Many people contributed to the publication of this book. I would like to take this opportunity and express my gratitude to each of them.

My sincerest thanks go to Celestin Suresh John for providing us with this exciting opportunity. Your confidence in the project provided the necessary groundwork.

I would like to thank Shrikant Vishwakarma for getting the project delivered. Since the projects inception, you have been vital to its success. Your editorial support made the project go from strength to strength.

I would like to thank Pramiti Guha and James Markham for their valuable feedback. Your suggestions helped me to deliver our ideas in a better way.

I would like to thank my co-author, Mohammad Atyab, for being incredibly knowledgeable and helpful. Your experience and willingness made the project a success. Thanks to the brainstorming sessions, the ideas were expressed clearly.

Moreover, I wish to express my appreciation to my parents, my loving and supportive wife, Swati, and my children, Rudra and Pranshi. You inspire me and encourage me constantly. Thanks for your patience and listening to my gibberish when not everything went according to plan.

Last but not least, I would like to thank my friends who have provided me with knowledge. I appreciated our discussions on various subjects. They often served as a benchmark for evaluating our knowledge.

Rahul Sharma