Download A Programmer’s Guide to Jini™ Technology by Jan Newmarch PDF

By Jan Newmarch

To comprehend Jini, think which you could circulation to a brand new place of work internationally, or payment into any hoteland may easily plug your pc or Palm at once into the neighborhood community. Your equipment could instantly be famous, and also you could 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 booklet is an accelerated, up-to-date model of the preferred on-line instructional for Jini. writer Jan Newmarch contains finished Jini developments introduced at Java One in June 2000. And he contains different vital themes, like how company Java Beans mixture in with the Jini framework and the way CORBA suits in as well.

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Jar. jar. The other support service needed for reggie is an RMI daemon. This is rmid, and it is a part of the standard Java distribution. Vendors could implement other RMI daemons, but this is unlikely to happen. rmid must be run on the same machine as reggie. The following command is a Unix command that runs rmid as a background process: rmid & This command also has major options: rmid [-port num] [-log dir] 24 Discovering a Lookup Service These options can specify the TCP port used (which defaults ta 4160).

Jar. RMI Daemon As mentioned earlier, a proxy service gets exported to the client, and in most cases it will need to communicate with its host service. There are many ways to do this, which are discussed in full in later chapters. One mechanism is the Java Remote Method Invocation (RMI) system. 2: the original UnicastRemoteObject and the newer Activatable class. Whereas UnicastRemoteObject requires a process to remain alive and running, Activatable objects can be stored in a passive state and the Activation system will create a new JVM if needed when a method call is made on the object.

Value) • Which fields it does not care about (a nul! value) For example, to search for a plain text editor, an entry like this would be used: Entry[] entries = new Entry[] {new FileType("plain/text")}; If any editor would do, the following entry could be used: Entry[] entries = new Entry[] {new FileType(null)}; Attribute Matching Mechanism The attribute matching mechanism is pretty basic. For example, a printer typically has the capacity to print a certain number of pages per minute, but if it specifies this using an Entry, it actually becomes rather hard to find.

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