Get A Programmer’s Guide to Jini™ Technology PDF

By Jan Newmarch

ISBN-10: 1430208600

ISBN-13: 9781430208600

ISBN-10: 1893115801

ISBN-13: 9781893115804

To comprehend Jini, think which you can stream to a brand new workplace the world over, or money into any hoteland may possibly easily plug your workstation or Palm at once into the neighborhood community. Your equipment could instantly be famous, and also you might have entry to the providers at that location—transparently.

Jini is Sun's Java-based expertise, with capability to make transparant, "universal plug and play" a truth. This e-book is an multiplied, 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 company Java Beans mix in with the Jini framework and the way CORBA suits in as well.

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Additional info for A Programmer’s Guide to Jini™ Technology

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The UnicastRegister program will receive a ServiceRegistrar from the service locator. However, it does so with a simple readObject() on a socket connected to the service locator, so it does not need any additional support services, such as rmiregistry or rmid. UnicastRegister The CLASSPATH for the UnicastRegister program should contain the Jini jar files as well as the path to basic/UnicastRegister. class. Broadcast Discovery If the location of a lookup service is unknown, it is necessary to make a broadcast search for one.

The main () method, having called this constructor, promptly goes to sIeep. What is going on here? The constructor for LookupDiscovery actually starts up a number ofthreads to broadcast the service and to listen for replies (see Chapter 21). When replies come in, the listener thread will call the discovered () method of the Mul ticastRegister. However, these threads are daemon threads. Java has two types of threads-daemon and user threads-and at Ieast one user thread must be running or the application will terminate.

It could do so by exporting a service object implementing Editor along with an Entry object saying that it can handle plain text and another Entry object saying that it can handle RTF files. The service implementation can just add more and more information about its capabilities without altering the basic intedace. type = typej } } For a text editor, the attribute setwould be FileType("plain/text"). For an RTF editor, the attribute set would be FileType("application/rtf"). For an editor capable of handling both plain text and RTF files, its capabilities would be given by using an array of entries: Entry[] entries = new Entry[] {new FileType("plain/text"), new FileType(" application/rtf") }j 44 Entry Objects On the other side, suppose a client wishes to find services that can handle the attributes that it requires.

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


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