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Download e-book for iPad: Java™ P2P Unleashed by Robert Flenner, Michael Abbott, Toufic Boubez, Frank Cohen,

By Robert Flenner, Michael Abbott, Toufic Boubez, Frank Cohen, Navaneeth Krishnan, Alan Moffet, Rajam Ramamurti, Bilal Siddiqui, Frank Sommers

ISBN-10: 0672323990

ISBN-13: 9780672323997

Java P2P Unleashed presents a unmarried resource for Java builders who are looking to boost P2P structures. The e-book explains the advantages of every one expertise and indicates how one can healthy the P2P "pieces" jointly - either in development new structures and integrating with latest ones. starts off with a dialogue of the P2P structure, referencing similarities with latest, wide-spread platforms whereas previewing different types of P2P purposes. It explains tips on how to plan forward for protection, routing, functionality and different concerns whilst constructing a P2P program. every one expertise integrated within the ebook - JXTA, Jini, JavaSpaces, J2EE, net providers - is approached from a P2P viewpoint, targeting implementation matters Java builders will face whereas utilizing them. The final part comprises numerous large-scale examples of alternative P2P purposes - handling content material, development groups, integrating providers, routing messages, and utilizing clever brokers to assemble details. the ultimate bankruptcy appears to be like forward to destiny advancements in Java P2P applied sciences"

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Java P2P Unleashed presents a unmarried resource for Java builders who are looking to improve P2P platforms. The booklet explains the advantages of each one know-how and exhibits tips to healthy the P2P "pieces" jointly - either in construction new structures and integrating with current ones. starts off with a dialogue of the P2P structure, referencing similarities with present, general structures whereas previewing various kinds of P2P functions.

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As you can see, the policy file we've been using in the examples grants all permissions to any code from anywhere. This is clearly not desirable in a production environment. Protection Domains A protection domain is a set of permission entries associated with a code source. The code source includes the URL where the code originated, and optionally the certificates of the entities that have signed the code. Every Java class is uniquely associated with a code source. 2. 2. The protection domain of an untrusted class.

These are the classes that are found in the boot classpath. Untrusted classes are all classes that fall outside the boot classpath. This includes the files that are downloaded over the network. The class file verifier verifies these files. The Class File Verifier To ensure that a file meets certain criteria, the class loader invokes the class file verifier. The class file verifier performs a series of checks: • File integrity check Ensures that a file has the appropriate signature and length. • Class integrity check Ensures that all classes, methods, and fields have legal names and signatures.

This is a common idiom in object-oriented programming. It is one of the techniques used to enable polymorphism. Java also supports interfaces. Interfaces enable you to extend the notion of abstract classes. All the methods defined in an interface are fundamentally abstract. In other words, a concrete class must implement the interface to provide the functionality defined by the methods. Interface definition enables you to define the methods and method signatures of a class without providing the concrete implementation.

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Java™ P2P Unleashed by Robert Flenner, Michael Abbott, Toufic Boubez, Frank Cohen, Navaneeth Krishnan, Alan Moffet, Rajam Ramamurti, Bilal Siddiqui, Frank Sommers


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