Core Java Data Objects by Sameer Tyagi, Michael Vorburger, Keiron McCammon, Heiko

By Sameer Tyagi, Michael Vorburger, Keiron McCammon, Heiko Bobzin

The necessity for patience is a prerequisite for any company software and the case is not any diverse for purposes written within the Java programming language. a regular Java program will encompass code that's accountable for storing and retrieving the appliance particular info to a couple form of garage facility in order that it may be retrieved and used at a later time. Now there's a new alternative-Java info items (JDO) that's good positioned to alter the best way builders have usually perceived endurance of their functions. JDO is a customary built below the auspices of the Java group procedure via a couple of individuals. JDO is a brand new know-how, however it is one who holds nice promise. while you're an architect, a developer or perhaps a supervisor that's concerned with patience in Java and wish to achieve an perception into this expertise then this ebook is for you.

Show description

Read Online or Download Core Java Data Objects PDF

Best object-oriented software design books

Ruby Phrasebook [programming]

Ruby Phrasebook
Jason Clinton
Essential Code and Commands
Ruby Phrasebook provides the code you must fast and successfully paintings with Ruby, one of many fastest-growing languages on this planet because of well known new Ruby applied sciences like Ruby on Rails.
Concise and Accessible
Easy to hold and simple to use–lets you ditch all these cumbersome books for one moveable pocket guide
Flexible and Functional
Packed with greater than a hundred customizable code snippets–so you could simply code sensible Ruby in exactly approximately any situation
Jason Clinton makes use of Ruby day-by-day in procedure management and improvement for complicated Clustering applied sciences, a Linux Beowulf cluster integrator. He has been operating within the laptop for greater than a decade and is actively concerned about the Kansas urban Ruby clients staff (KCRUG), serving as administrator of the group’s website and mailing list.
Register your publication at informit. com/register for handy entry to downloads, updates, and corrections as they develop into available.
Programming / Ruby
$16. ninety nine united states / $18. ninety nine CAN / £10. ninety nine internet united kingdom

Pattern-Oriented Software Architecture Volume 4 A Pattern Language for Distributed Computing

The eagerly awaited Pattern-Oriented software program structure (POSA) quantity four is set a trend language for disbursed computing. The authors will advisor you thru the easiest practices and introduce you to key components of creating allotted software program platforms. POSA four connects many stand-alone styles, trend collections and development languages from the present physique of literature present in the POSA sequence.

Machine Learning Using R

This e-book is electrified by way of the computer studying version construction procedure circulate, which gives the reader the power to appreciate a ML set of rules and follow the complete means of development a ML version from the uncooked information. This new paradigm of training laptop studying will result in an intensive swap in conception for plenty of of these who imagine this topic is hard to benefit.

Extra resources for Core Java Data Objects

Example text

Hayes Getting Started with JDO This chapter explains the basics of how JDO works and how to use JDO to create, read, update and delete persistent objects. It introduces some of the advanced concepts b ehind JDO and aims to provide sufficient understanding to allow a Java programmer to develop an application using JDO. The examples for this chapter are located in directory “examples/chapterX” on the CD accompanying the book. 1 HOW DOES JDO WORK? The goal of JDO is to be able to transparently store instances of any user defined Java class in a datastore and retrieve them again with as few a limitations as possible.

Content subject to change 14 Chapter 3 Object Lifecycle JDO defines a number of states for persistent objects, these states are used by the JDO runtime to manage the in-memory lifecycle of persistent objects. Whilst it is not necessary to really understand the JDO object lifecycle (its really of primary concern to the JDO vendors) an appreciation of what happens under the covers is always a good idea. X on Object Lifecycles for more details. 6 READING AN OBJECT Once an instance has been made persistent and its fields stored in the datastore it can be retrieved again at some later point in time, either within the same application or by a different application.

Buy” discussion. 1. Caching Now that objects can be instantiated on-demand and unique references are returned for unique data in the database, it is a small step to realize further caching. Why should a call to getAuthor in the above example do anything at all, if the author object was previously already retrieved? Just the firstly returned Java reference can be returned again. The following pseudo code illustrates the idea: • Check, if the book instance already contains valid data If yes, return the Author reference • Take the book's BOOKID • Create a JDBC statement like SELECT * FROM BOOKS WHERE BOOKID = id • Copy necessary fields of the result record into the book instance • Create an Author instance • Copy the AUTHORID from the result record into the Author instance • Mark the Author instance, so that it is loaded when a get() method is called • Return the author instance.

Download PDF sample

Rated 4.04 of 5 – based on 26 votes