Lease write(Entry entry, Transaction txn, long lease) throws TransactionException, RemoteException; long NO_WAIT = 0;. JavaSpaces Example by Example. 4. This interface is implemented by servers that export a * JavaSpaces technology service. The operations in this interface * are the public methods that all such. JavaSpaces is a powerful Jini service that provides a high-level tool for creating . For example, a distribute algorithm might require processes to work in lock.
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Halter Published Nov 9, by Prentice Hall. This allows for the simple exchange of tasks, requests, and information in the form of Java objects. In particular, the introduction of JavaSpaces technology simplifies the distributed computing environment in several ways. Preface Preface Writing distributed programs is hard. Setting up policy files and using some simple protocols to aid in application level security are discussed.
Examples include using JavaSpaces as a mechanism for decoupled communication, application structuring, and parallel computing. Starting with the GUI. This chapter covers some of the concepts involved with programming in a distributed environment. Other Technologies of Interest.
Running the Ray-Tracing Example. Some common techniques for doing this, such as jafaspaces to decide what computations could benefit from being distributed and how to distribute data, are discussed in this chapter.
This book should provide a solid base with a coherent set of examples to lead people in the right directions for using JavaSpaces technology. Getting and Installing Jini. You then look at what an Entry is and how it can be used.
The good news is that every year it is getting a little bit easier as programming technologies and tools gradually catch up to the needs of a distributed environment.
Although an experienced Jini developer may skip this jaavaspaces, for beginners, this should be extremely valuable. Halter provides in-depth coverage of scalability and availability, concluding with detailed guidance on using security features based on Java 2 technology to protect distributed JavaSpaces applications.
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This chapter shows you how some of the security features of Java can be currently used with JavaSpaces. Parallel Computing in General. This chapter takes you through the process of installing Jini and JavaSpaces and running a simple application. Table of Contents Preface.
JavaSpaces Example by Example
On the “what” side, the JavaSpace interface is presented along with some definitions of what the interfaces are. Each concept uavaspaces presented in the context of simple examples at this point. Effectively making use of the simple interface, however, requires a number of tools, both conceptual and practical.
Core Servlets and JavaServer Pages: Book Sorry, this book is no longer in print. Distributed Events and JavaSpaces. He walks you through obtaining, installing, and configuring JavaSpaces architecture, addressing common problems such as authorization configuration and improper codebase settings.
Getting a JavaSpace Running. In Chapter 5, “Encouraging Distribution,” you start to explore programming in a distributed environment. Starting from the Command Line. This chapter is intended to establish familiarity and building blocks for these topics. You’ll learn powerful distributed programming techniques, including the effective use of data structures and collections; and better ways to improve performance, prevent deadlock, and take full advantage of parallelism.
In particular, it uses the concept of a linked list to explore some of the differences between distributed and nondistributed data structures. In it, you also briefly encounter some of the ways JavaSpaces are being used and might be used. Using Leases with JavaSpaces. In particular, some of the common problems, such as authorization configuration problems and improper codebase settings, are covered.
The hands-on, example-rich guide to JavaSpaces technology Building robust, scalable, high-performance distributed applications Up-to-the-minute coverage based on Jini 1. The intended audience is for examlpe to advanced programmers wanting to learn about JavaSpaces. Useful Places for Information. What Is a JavaSpace? JavaSpaces technology simplifies distributed computing, by providing a shared virtual space where tasks, requests, and information can easily be exchanged in the form of objects based on Javatm technology.
JavaSpaces Example by Example | InformIT
In Part 2, “Distributed Programming,” you look at how exakple can apply the basics that you learned in Part 1 into writing distributed applications. There is currently no standard Jini security model. Add To My Wish List. That does not mean, however, that your application can have no security itself. Chapter 9, “Security Issues,” looks into some of the security issues around JavaSpaces. Piecing Together the Results.
The application presents a small ordering processing system. Halter begins by introducing JavaSpaces technology: A Parallel Computing Framework. In Chapter 1, “About JavaSpaces” you explore what JavaSpaces are, how this book deals with them, and why anyone would want to use them.