A Practical Theory Of Reactive Systems

A man may imagine he understands something, but still not understand anything in the way that he ought to. (Paul of Tarsus, 1 Corinthians 8:2) Calling this a ‘practical theory’ may require some explanation. Theory and practice are often thought of as two di?erent worlds, governed bydi?erentideals,principles, andlaws.DavidLorgeParnas, forinstance,who hascontributedmuchtoourtheoreticalunderstandingofsoftwareengineering and also to sound use of theory in the practice of it, likes to point out that ‘theoretically’ is synonymous to ‘not really’. In applied mathematics the goal is to discover useful connections between these two worlds. My thesis is that in software engineering this two-world view is inadequate, and a more intimate interplay is required between theory and practice. That is, both theoretical and practical components should be integrated into a practical theory. It should beclearfrom theabovethattheintended readership of this book is not theoreticians. They would probably have di?culties in appreciating a book on theory where the presentation does not proceed in a logical sequence from basic de?nitions to theorems and mathematical proofs, followed by - plication examples. In fact, all this would not constitute what I understand by a practical theory in this context.

A man may imagine he understands something, but still not understand anything in the way that he ought to. (Paul of Tarsus, 1 Corinthians 8:2) Calling this a ‘practical theory’ may require some explanation. Theory and practice are often thought of as two di?erent worlds, governed bydi?erentideals,principles, andlaws.DavidLorgeParnas, forinstance,who hascontributedmuchtoourtheoreticalunderstandingofsoftwareengineering and also to sound use of theory in the practice of it, likes to point out that ‘theoretically’ is synonymous to ‘not really’. In applied mathematics the goal is to discover useful connections between these two worlds. My thesis is that in software engineering this two-world view is inadequate, and a more intimate interplay is required between theory and practice. That is, both theoretical and practical components should be integrated into a practical theory. It should beclearfrom theabovethattheintended readership of this book is not theoreticians. They would probably have di?culties in appreciating a book on theory where the presentation does not proceed in a logical sequence from basic de?nitions to theorems and mathematical proofs, followed by - plication examples. In fact, all this would not constitute what I understand by a practical theory in this context.

This volume contains the papers presented at the 8th Workshop on Computing: Theory and Practice, WCTP 2018 and is devoted to theoretical and practical approaches to computation. The conference was organized by four top universities in Japan and the Philippines: the Tokyo Institute of Technology, Osaka University, the University of the Philippines Diliman, and De La Salle University. The proceedings provide a broad view of the recent developments in computer science research in Asia, with an emphasis on Japan and the Philippines. The papers focus on both theoretical and practical aspects of computations, such as programming language theory, modeling of software systems, empathic computing, and various applications of information technology. The book will be of interest to academic and industrial researchers interested in recent developments in computer science research.

Reactive systems and event-driven architecture are becoming indispensable to application design, and companies are taking note. Reactive systems ensure that applications are responsive, resilient, and elastic no matter what failures or errors may be occurring, while event-driven architecture offers a flexible and composable option for distributed systems. This practical book helps Java developers bring these approaches together using Quarkus 2.x, the Kubernetes-native Java framework. Clement Escoffier and Ken Finnigan show you how to take advantage of event-driven and reactive principles to build robust distributed systems, reducing latency and increasing throughput, particularly in microservices and serverless applications. You'll also get a foundation in Quarkus to help you create true Kubernetes-native applications for the cloud. Understand the fundamentals of reactive systems and event-driven architecture Learn how to use Quarkus to build reactive applications Combine Quarkus with Apache Kafka or AMQP to build reactive systems Develop microservices that utilize messages with Quarkus for use in event-driven architectures Learn how to integrate external messaging systems, such as Apache Kafka, with Quarkus Build applications with Quarkus using reactive systems and reactive programming concepts

This is the proceedings of the Third Workshop on Computing: Theory and Practice, WCTP 2013 devoted to theoretical and practical approaches to computation. This workshop was organized by four top universities in Japan and the Philippines: Tokyo Institute of Technology, Osaka University, University of the Philippines — Diliman, and De La Salle University. The proceedings provides a comprehensive view of the current development of fundamental research in formal method, programming language and programming development environment, bioinformatics, empathic and intelligent systems, and computing gaming in Japan and the Philippines.

This is the proceedings of the Sixth Workshop on Computing: Theory and Practice, WCTP 2016 devoted to theoretical and practical approaches to computation. This workshop was organized by four top universities in Japan and the Philippines: Tokyo Institute of Technology, Osaka University, University of the Philippines - Diliman, and De La Salle University. The proceedings provides a view of the current movement in research in these two countries. The papers included in the proceedings focus on the two research areas: theoretical and practical aspects of computation.

This is the proceedings of the Seventh Workshop on Computing: Theory and Practice, WCTP 2017 devoted to theoretical and practical approaches to computation. This workshop was organized by four top universities in Japan and the Philippines: Tokyo Institute of Technology, Osaka University, University of the Philippines Diliman, and De La Salle University. The proceedings provides a view of the current movement in computational research in these two countries. The papers included in the proceedings focus on both: theoretical and practical aspects of computation.

Forthe29thtime,SOFSEM(SOFtwareSEMinar)washeld.Havingtransformed over the years from a local event to a fully international conference, the c- temporary SOFSEM is a mix of a winter school and a conference striving for multidisciplinarity in computer science, accompaniedby workshops dedicated to a narrow ?eld (this year multimedia and softcomputing) and a student forum. This volume constitutes the proceedings of SOFSEM 2002 held in Milovy, Czech Republic, November 22–29, 2002. This year, 23 papers were submitted from 11 countries. The selection of the 11 best papers accepted by the Program Committee was based on their contribution to the state of the art, technical soundness, clarity of presentation, and relevance of bibliography. The Steering Committee supported by the Advisory Board recommended 12 invited talks focusedonthefollowingkeytopicareas:distributedandparallelsystems,system design and testing, databases and information systems, and fundamentals. SOFSEM is the result of considerable e?ort by a number of people. It is our pleasure to record our thanks to the Advisory Board for its support, to the Steering Committee for its general guidance, and to the Organizing Committee for making SOFSEM 2002 happen. It has been an honor for us to work with the members of the Program Committee and other referees who devoted a lot of e?ort to reviewing the submitted papers.