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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Chapter 10, “Wrapping It up” ties up any loose ends. Halter begins by introducing JavaSpaces technology: This chapter shows you how some of the security features of Java can be currently used with JavaSpaces. The application presents a small ordering processing system. This book should provide a solid base with a coherent set of examples to lead people in the right directions for using JavaSpaces technology.

JavaSpaces Example by Example

Unlimited one-month access with your purchase. The Music Store Examplw. This will be used to illustrate the concepts of sharing data in a fair and reliable manner. Register your product to gain access to bonus material or receive a coupon. Useful Places for Information. Chapter 6, “Preventing Deadlock,” discusses mechanisms for allowing processes to avoid deadlock. 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 Chapter 1, “About JavaSpaces” you explore what JavaSpaces are, how this book deals with them, and why anyone would want to use them.

It covers a simple method of locating a single JavaSpace. In Part 2, “Distributed Programming,” you look at how you can apply the basics that you learned in Part 1 into writing distributed applications.

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What Is a JavaSpace? In Chapter 5, “Encouraging Distribution,” you start to explore programming in a distributed environment.

Some common techniques for doing this, such as how to decide what computations javawpaces benefit from being distributed and how to distribute data, are discussed in this chapter. Starting the Supporting Services. Using Leases with JavaSpaces.

Getting and Installing Jini. 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.

Core Servlets and JavaServer Pages: On the “why” side, the chapter presents some high level descriptions of the uses of JavaSpaces that are fleshed out in later chapters. To compile the classes for the synchronization example in Windows, use the following.

The intended audience is for intermediate to advanced programmers wanting to learn about JavaSpaces. On the “what” side, the JavaSpace interface is presented along with some definitions of what the interfaces are.

JavaSpaces provides these capabilities with a very simple interface. 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. Although an experienced Jini developer may skip this chapter, for beginners, this should be extremely valuable.

Effectively making use of the simple interface, however, requires a number of tools, both conceptual and practical. Add To My Wish List. Obtaining and Installing JavaSpaces. Chapter 7, “Sharing Fairly,” presents a more complex application example that makes use of and ties together many of the topics covered in earlier chapters.

In it, you also briefly encounter some jafaspaces the ways JavaSpaces are being used and might be used.

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Distributed programming is different than programming within a single machine process. Book Sorry, this book is no longer in print.

JavaSpaces Example by Example | InformIT

This should not be a surprising statement to anyone who has had to deal with a distributed programming environment in exam;le past. This chapter takes you through the process of installing Jini and JavaSpaces and running a simple application. There is currently no standard Jini security model.

Setting up policy files and using some simple protocols to aid in application level security are discussed. Core Technologies, 2nd Edition.

Other Technologies of Interest. Preface Preface Writing distributed programs is hard. 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.

This chapter covers some of the exampld involved with programming in a distributed environment. A working knowledge of Java is needed, and an acquaintance with Jini concepts is very useful, but not required. Exa,ple 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.

Examples include using JavaSpaces as a mechanism for decoupled communication, application structuring, and parallel computing.

Later chapters make greater use of these. Chapter 9, “Security Issues,” looks into javasspaces of the security issues around JavaSpaces. JavaSpaces Example by Example offers an example-rich introduction to JavaSpaces architecture and its Jini network technology-based interfaces.

A Prime Number Counter Application.