Guide to J2EE: Enterprise Java by John Hunt, Chris Loftus (auth.)
By John Hunt, Chris Loftus (auth.)
In this e-book, John Hunt and Chris Loftus take you thru the middle applied sciences that make up the company variation of the Java 2 platform (J2EE). They hide the entire features of J2EE that either execs and scholars want to know to construct multi-tier company functions in Java - the applied sciences, the layout method and layout styles. even if you're a specialist or scholar, this publication may also help equip you with the talents you must construct firm huge purposes in Java. Key subject matters contains layout concerns utilizing J2EE styles Covers all components of the firm program J2EE makes use of an built-in instance that spans the chapters to be equipped up by way of the reader extra available and not more daunting than most of the pageant A coherent complete, instead of self reliant separate chapters (as with a few competitors) positive aspects and advantages offers an outline of J2EE applied sciences and their advantages. Discusses architectural layout matters utilizing J2EE styles. seems on the problems with designing and development multi-tier J2EE purposes. comprises totally labored examples, outfitted up during the publication, which permit you to speedy enhance your personal multi-tier functions. in regards to the Authors: Dr. John Hunt is Technical Director at JayDeeTechnology Ltd. He runs business classes, together with server-side Java applied sciences. He additionally leads improvement initiatives for presidency and blue chip corporations utilizing Java, J2EE, XML and C#. Chris Loftus is a educating Fellow on the division of desktop technology on the collage of Wales, Aberystwyth. He has taught Java-based classes, together with J2EE, either in college and industry.
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Extra resources for Guide to J2EE: Enterprise Java
The Web tier contains server-side components that are responsible for receiving, processing and responding to HTTP/S requests. Servlets and JSPs are the two J2EE technologies used in this tier. Servlets and JSPs may respond with HTML, XML, GIFs, applets etc. that are received by the original client. Normally, these Web components need to interact with business data, either directly from a database or via EJBs. Communication with EJBs is achieved using RMI, JMS or JAX-RPC. Communication with databases, and other external information systems, is achieved using JDBC or the Java Connector Architecture OCA).
2 . Introduction to Distributed S stems 17 Object systems pose some problems. First, as a developer you may forget that there is a communication cost associated with using remote objects. Hiding the distribution plumbing may also help you to forget that the proxy will communicate over the network. Second, on their own, object systems are not sufficient. As a developer you need access to many generic distribution services that support your distributed objects in various ways. One such service is a naming and directory service that allows you to find distributed objects prior to using them.
Are we really transferring data to the correct component, or is there an impostor at the other end of the connection? Is the data commercially sensitive or personally confidential? If so, appropriate security mechanisms must be employed to prevent access or tampering and to validate the identity of both ends of the connection. Exposing your enterprise programs to the public network makes the consequences of programming faults or maladministration of confidential information much more serious. 2700 customers who bought some online software from the Association's Web site discovered that their credit card details had been exposed accidentally.