Download A Programmer’s Guide to Jini™ Technology by Jan Newmarch PDF
By Jan Newmarch
To comprehend Jini, think which you could stream to a brand new place of work the world over, or cost into any hoteland may easily plug your laptop or Palm without delay into the neighborhood community. Your machine may instantly be well-known, and also you may have entry to the prone at that location—transparently.
Jini is Sun's Java-based know-how, with power to make transparant, "universal plug and play" a fact. This e-book is an multiplied, up to date model of the most well-liked on-line instructional for Jini. writer Jan Newmarch contains finished Jini developments introduced at Java One in June 2000. And he contains different vital issues, like how firm Java Beans mixture in with the Jini framework and the way CORBA suits in as well.
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Extra resources for A Programmer’s Guide to Jini™ Technology
It is a pity from the programmer's view that a more flexible mechanism was not used. One suggestion often made in the Iini mailing list is that there should be a boolean matches () method on the service object. However, that would involve unmarshalling the service on the locator in order to run the matches () method, and this would slow the lookup service down and generate a couple of awkward questions: • What security permissions should the filter run with?
5erviceRegistrar The 5erviceRegistrar is an abstract class that is implemented by each lookup service. The actual details of this implementation are not relevant here. The role of a 5erviceRegistrar is to act as a proxy for the lookup service. This proxy runs in the application, which may be a service or a client. This is the first object that is moved from one NM to another by Iini. It is shipped from the lookup service to the application looking for the lookup service, using a socket connection.
This syntactic check is not even done for the second constructor, which takes a host name and port separately. InvalidLookupLocator The following program creates some objects with valid and invalid host/URLs. Theyare only checked for syntactic validity rather than existence as URLs. That is, no network lookups are performed. This should be treated as a basic example to get you started building and running a simple Jini program. err. println(UFirst lookup failed: U+ e. 2 compiler. Jini programs will not compile or run under JDK LI (anyversions).