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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On the “why” side, the chapter presents some high level descriptions of the uses of JavaSpaces that are fleshed out in later chapters. Other Technologies of Interest. The application presents a small ordering processing system. This will be used to illustrate the concepts of sharing data in a fair and reliable manner. Distributed Events and JavaSpaces. This means that developers working with JavaSpaces can also make use of the various Jini services, such as transactions and notification.

Piecing Together the Results. Later chapters make greater use of these. There is currently no standard Jini security model. Chapter 8, “Parallel Computing,” looks into some of the areas where you can get into performance trouble and also some of the ways in which JavaSpaces can be an aid to performance. Preface Writing distributed programs is hard. Using Leases with JavaSpaces. That does not mean, however, that your application can have no security itself.

A Parallel Computing Framework. Each concept is presented in the context of simple examples at this point. Parallel Computing in General. Using Transactions with JavaSpaces. Running the Ray-Tracing Example. Description Copyright Dimensions: Useful Places for Information. Extensive code examples illustrate: Book Sorry, this book is no longer in print. Examples include using JavaSpaces as a mechanism for decoupled communication, application structuring, and parallel computing.


Register your product to gain access to bonus material or receive a coupon. Some common techniques for doing this, such as how to decide what computations could benefit from being distributed and how to distribute data, are discussed in this chapter. Doing this the first time can be a challenging experience.

JavaSpaces Example by Example | InformIT

Getting a JavaSpace Running. Although an experienced Jini developer may skip this chapter, for beginners, this should be extremely valuable. Starting with the GUI. Distributed programming is different than programming within a single machine process. 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.

This chapter is intended to establish familiarity and building blocks for these topics. In Part 2, “Distributed Programming,” you look at how you can apply the basics that you learned in Part 1 into writing distributed applications. Core Technologies, 2nd Edition.

JavaSpaces technology is a simple mechanism for performing distributed computing. This chapter covers locking and sharing issues and presents mechanisms, such as semaphores, for dealing with resource synchronization.

It covers a simple method of locating a single JavaSpace. 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.

To compile the classes for the synchronization example in Windows, use the following. Halter Published Nov 9, by Prentice Hall.


JavaSpaces Example by Example

In Chapter 1, “About JavaSpaces” you explore what JavaSpaces are, how this book deals with them, and why anyone would want to use them. Core Servlets and JavaServer Pages: Obtaining and Installing JavaSpaces. Next, he introduces the fundamental concepts of development, including entries, leasing, events, transactions, and persistence.

Types of Eaxmple Problems.

In Part 3, “Going to the Next Level,” you look at how you can use the mechanisms you learned in Parts 1 and 2 and use these mechanisms to help meet demands that are needed to move into real world applications. In it, you also briefly encounter some of the ways JavaSpaces are being used and might be used. Get unlimited day access to javaspacfs 30, books about UX design, leadership, project management, teams, agile development, analytics, core programming, and so much more.

The intended audience is jvaspaces intermediate to advanced programmers wanting to learn about JavaSpaces. Again, each of the topics is covered in a simple example format.

A Prime Number Counter Application. Add To My Wish List. Chapter 10, “Wrapping It up” ties up any loose ends. In particular, it uses the concept of a linked list to explore some of the differences between distributed and nondistributed data structures. In particular, the javaspaaces of JavaSpaces technology simplifies the distributed computing environment in several ways.

This chapter takes you through the process of installing Jini and JavaSpaces and running a simple application.