By Jan Newmarch
To comprehend Jini, think you can stream to a brand new workplace internationally, or payment into any hoteland may possibly easily plug your pc or Palm at once into the neighborhood community. Your gadget might instantly be well-known, and also you might have entry to the providers at that location—transparently.
Jini is Sun's Java-based know-how, with power to make transparant, "universal plug and play" a fact. This publication is an increased, up to date model of the preferred on-line educational for Jini. writer Jan Newmarch comprises entire Jini developments introduced at Java One in June 2000. And he contains different very important subject matters, like how firm Java Beans mixture in with the Jini framework and the way CORBA matches in as well.
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The chapter also discusses issues particular to the Sun lookup service, reggie. Running a Lookup Service A client locates a service by querying a lookup service (service locator). In order to do this, it must tirst locate a lookup service. Similarly, a service must register itself with a lookup service, and in order to do so it must also tirst locate a lookup service. The initial task for both a client and a service is thus discovering a lookup service. Such a service (or set of services) will usually have been started by some independent mechanism.
About 50 percent of the messages in the Jini mailing list are about these configuration problems. " This chapter looks at some ofthe problems that can arise in a Jini system. Most of them are configuration problems of some kind. This is the second chapter in the book, so right now you shouldn't have managed to fail at anything! In the following chapters, the sections contains instructions on what to do to get the example programs working, and include step-by-step instructions, şo skip on to the next chapters, but come back here when things go wrong.
Codebase property. The object's serialized data contains this codebase, which is used by the client to access the class files. If the codebase specifies an HTTP URL, then there must be an HTTP server running at that URL and the class files must be on this server. This often means that there is one HTTP server per service, but this isn't required-a set of services could make their class files available from a singIe HTTP server, and this server could be running on a different machine than the services.