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JDO/JDBC/SQLJJava Data Objects (JDO), Java Database Connectivity (JDBC) and SQLJ provide important Java-based database objects or connectivity to Enterprise Information Systems (EIS), whether it be Legacy or middleware.Subtopics: Don't Let Hibernate Steal Your Identity By James Brundege Hibernate has one set of ideas about how to make something unique, such as using a database sequence number as an ID. But this clashes with Java's need for implementations of equals() and hashCode() that determine identity for objects, even those that haven't yet made a trip to the database and thus can't have a sequence number. James Brundege has an option that should satisfy both Hibernate and Java. Sep. 13, 2006JDBC 4.0 Enhancements in Java SE 6 By Srini Penchikala Java SE 6 (aka Mustang) brings with it a new set of improvements to the JDBC API for accessing databases. Improvements include support for the RowID interface, better exception handling, annotation-based queries, and (finally!) and end to the clumsy Class.forName() system of loading database drivers. In this article, Srini Penchikala tours the major features of JDBC 4.0. Aug. 2, 2006 Making the Most of JDBC with WebRowSet By Sharad Acharya Database to XML and back again. If everyone's doing some or all of this, then shouldn't we write it once, get it right, and standardize? JDBC 3.0's WebRowSet offers a profound increase in power over the old ResultSet. Sharad Acharya shows you what's possible. Jun. 21, 2006 Using Spring with JDO and Hibernate Everyone knows about Hibernate, but what about Java Data Objects? Both of these object-relational persistence frameworks are well supported by Spring, and in this excerpt from Spring: A Developer's Notebook, Bruce Tate and Justin Gehtland show you the advantages of each and how to integrate them with Spring. Feb. 8, 2006 Spring: Integrating iBATIS iBATIS is one of the object-relational (OR) frameworks embraced by the Spring framework, and it's an ideal choice for those seeking a middle ground between full-blown OR and hand-written JDBC. In this excerpt from Spring: A Developer's Notebook, Bruce Tate and Justin Gehtland show how to integrate iBATIS with Spring. Jan. 18, 2006 Hibernate Class Generation Using hbm2java By John Ferguson Smart Hibernate uses mapping files to express the mapping of Java classes to database tables. In a complex project, keeping mappings in sync with your Java code can be burdensome and error-prone. Fortunately, the hbm2java tool can automate this by generating POJO classes from the mapping files. John Ferguson Smart shows how to use hbm2java with Ant and Maven, and how to customize the behavior of the generated classes. Dec. 14, 2005Lightweight R/O Mapping By Norbert Ehreke O/R frameworks map Java classes to database tables and SQL code. While popular, this approach is unpopular among DBAs, with the database at the mercy of an external tool. Another approach is to go the other direction: write tables and stored procedures and generate Java classes from that. Norbert Ehreke introduces Amber, a framework that embodies this approach. Dec. 7, 2005 Hibernate for Java SE By Jason Lee For many, Hibernate goes hand in hand with Java EE as part of their enterprise development strategy. But what if you need access to your data access objects outside of the EE container? Jason Lee offers some strategy for getting and using a Hibernate session from Java SE code. Nov. 16, 2005 iBatis DAO By Sunil Patil The J2EE Data Access Object pattern calls for encapsulating access to a data source behind an API, giving you the freedom to change implementations or use different persistence strategies for different operations. As Sunil Patil shows, the Apache iBatis DAO framework helps you develop such a strategy. Aug. 10, 2005 Hibernate 3 Formulas By Dai Yifan Hibernate's formula element has been limited in previous versions of the popular object-relational mapping framework, but in Hibernate 3, your formulas can be used in many new ways that will simplify and empower your programming. Dai Yifan shows you what's new. Aug. 3, 2005Prevalence: Transparent, Fault-Tolerant Object Persistence By Jim Paterson Want to persist your objects, with transactional integrity? You probably assume you're going to be using a database, but not so fast--for lighter uses, particularly for prototyping and testing, the idea of "prevalence" may make more sense. Jim Paterson introduces it by way of Prevayler, a popular prevalence framework. Jun. 8, 2005 Simple Object Persistence with the db4o Object Database By Jim Paterson Mapping Java objects to relational databases is a difficult task, fraught with perils and gotchas. db4o dodges the issue entirely by providing an object-oriented persistence mechanism that is small, lightweight and efficient. Jim Paterson shows how it works. Dec. 1, 2004 Using CachedRowSet to Transfer JDBC Query Results Between Classes By Sean Eidemiller JDBC developers have always needed to keep a database connection open while pulling query results. But with the CachedRowSet in J2SE 1.5, it's now possible to disconnect and then get results. Sean Eidmiller shows the advantages of this approach. Jun. 23, 2004 Interruptible Database Queries By Slav Boleslawski Perceived performance isn't just about speed; it's also about responsiveness. And few things frustrate a user like an application that ignores user input because it's off doing something else. Slav Boleslawski introduces threading techniques to keep database queries and result retrieval from locking up an application. Jun. 16, 2004 SQL Database Access with DBTags By Deepak Vohra Jakarta DBTags is a custom tag library that consists of tags to access and modify a database. This tutorial explains the procedure to incorporate Apache Jakarta DBTags custom tag library tags in an example JSP. May. 5, 2004 Lisp and Java By Dan Milstein First-class functions are a powerful feature of the Lisp programming langauge. This article describes some ways they can be used, and explores how to approximate them in Java. Mar. 24, 2004 Configuring JBoss 4.0 JDBC Connectivity By Deepak Vohra JBoss uses the HypersonicDB by default, but with a few configuration changes, it can use any JDBC-equipped database. Deepak Vohra shows how to use Oracle, Sybase, MySQL and other databases with JBoss. Feb. 25, 2004 Effective Unit Testing with DbUnit By Andrew Glover Writing unit tests first can be impractical when your code will depend on access to a database. Enter DbUnit, which allows you to write simple XML files to fill in for the yet-to-be populated database for testing purposes. Jan. 21, 2004 Hibernate Your Data By Davor Cengija Hibernate can persist any kind of Java object, manipulate a hierarchy of objects, handle collections, and work with transactions. Davor Cengija shows you how. Jan. 14, 2004 Stored Procedures for Java Programmers By Nic Ferrier You can build your application on top of a persistence layer such as EJB, but that's not your only option. Another alternative is stored procedures. Nic Ferrier explains how they work and why the common objection -- portability -- doesn't always apply. Aug. 13, 2003 Object-Relational Mapping with Apache Jakarta OJB By Charles Chan Object persistence is important in enterprise applications, but mapping class hierarchies to relational databases can be tricky. Enter OJB, an open source persistence framework. Charles Chan demonstrates nearly-painless techniques for saving your objects. Jan. 8, 2003 "Castor JDO": Simply False Advertising By David Jordan This expert perspective lays it on the line: Exolab's Castor JDO product does not support the JDO standard. The use of the acronym is causing confusion in the marketplace, and flirts with a violation of Sun's Java trademark. Dec. 4, 2002 Using Castor JDO for SQL Mapping By Jeff Lowery An in-depth look at using Castor's marshalling engine to do data binding of Java objects to tables, rows, and columns in an SQL database. Oct. 2, 2002 An Introduction to JDBC, Part 3 By William Crawford, Jim Farley In part three of this four-part excerpt on JDBC from Java Enterprise in a Nutshell, learn about error handling, prepared statements, BLOBs and CLOBs. Jun. 12, 2002 Flawed Understanding of JDO Leads to FUD By David Jordan In this scathing response to Don Bales' recent critique of Java Data Objects, David Jordan offers proof that JDO does not regard SQL as a "bad thing," yields shorter and simpler code, and is vendor-neutral. May. 29, 2002 An Introduction to JDBC, Part 2 By William Crawford, Jim Farley Part Two of this excerpt from Java Enterprise in a Nutshell focuses on database connection, statements and results. May. 29, 2002 An Introduction to JDBC, Part 1 By William Crawford, Jim Farley In this excerpt from Chapter 2 of Java Enterprise in a Nutshell, the authors introduce the JDBC architecture. May. 1, 2002 DDL Statements and Transactions By Jason Price Learn how to add SQLJ statements to Java programs that use the embedded SQL Data Definition Language. Mar. 6, 2002 JDO vs. Entity Beans: A Modest Proposal By Marek Mosiewicz The Java Data Objects (JDO) approach can replace performance-poor Entity Beans in many cases. But JDO is not enough; here's a proposal for improving Entity Beans without sacrificing their server-side power. Feb. 27, 2002 Database Access Using Lightweight Applets By Donald Bales Using lightweight applet technology, you can bring the full weight of Java's GUI capability and the advantages of client-side dynamic database access to your Web applications. Because the technology employs HTTP to communicate with a database via SqlServlet, lightweight applets perform well, yet remain small enough to have acceptable download times. Feb. 20, 2002 Java Programming with Oracle JDBC: Performance By Donald Bales When it comes to JDBC performance issues, there are two major factors to consider: performance of the database structure and the SQL statements used against it and relative efficiency of the different ways you can use the JDBC interfaces to manipulate a database. This excerpt from Java Programming with Oracle JDBC explores these. Feb. 13, 2002 Expiring Data with Hashbelts By William Grosso The final installment in this series on automatic data expiration shows that hashbelts are a new data structure that satisfies all of the requirements for data expiration. Feb. 13, 2002 DML Statements By Jason Price Learn how to add SQLJ statements to your Java programs that use embedded SQL Data Manipulation Language (DML) statements. Feb. 6, 2002 Using Java Data Objects By Dion Almaer The JDO standard frees developers from having to worry about database operations, letting them focus on business logic. This article builds a sample address book app in JDO. Feb. 6, 2002 The Hashbelt Data Structure By William Grosso William Grosso continues his Data Expiration series by focusing on the 'hashbelt' algorithm, which is a generic data structure adaptable to a wide variety of time-sensitive data problems. Jan. 30, 2002 The Debate Over Java Data Objects By Dion Almaer The Java Data Objects spec is intended to free developers from worrying about mapping objects to databases. But not everyone thinks it's a great idea. Vendors like Thought Inc. take issue with JDO and think they have better solutions. Dion Almaer weighs in on the issues. Jan. 23, 2002 Dynamic Database Access from Client-Side JavaScript By Donald Bales Imagine the advantages of being able to dynamically access a database from client-side JavaScript. You could dynamically query a database from JavaScript for client-side field validation, or dynamically populate a drop-down select list, to name just a few possibilities. In fact, you can do this with the help of an applet-servlet pair. This article describes the applet-servlet pair architecture and offers several sample applications. Jan. 23, 2002 Introducing Automatic Data Expiration By William Grosso How you choose to expire data can make the difference between an application that scales to enterprise quality and one that doesn't. In the first of this three-part series, William Grosso covers the fundamentals of data expiration, and presenting solutions of increasing functionality. Jan. 9, 2002 Database Connections and SQLJ Statements By Jason Price Jason Price describes how to connect to a database and embed SQL statements in your Java programs using SQLJ. Jan. 2, 2002 Unlocking the True Power of Entity EJBs By Tyler Jewell Tyler Jewell explains the real power of entity EJBs: developers can write once and deploy many times, with each deployment customized for unique data scenarios. Dec. 19, 2001 Setting Up Your Environment to Develop SQLJ Programs By Jason Price Jason Price describes how to set up your environment to develop SQLJ applications, and he demonstrates a "Hello World" program that uses SQLJ to access a database. Dec. 5, 2001 Tuning JDBC: Measuring JDBC performance By Jack Shirazi Many Java apps are dependent on Java Database Connectivity, but how do you measure JDBC's performance, and which subsystems need optimizing? Dec. 5, 2001 Learning EJB QL By Jeelani B. Shaik Learn how the addition of EJB QL to EJB 2 justifies the distributed component architecture as the standard way of defining queries, which allows database applications to be more portable. Sep. 19, 2001 Java Programming with Oracle SQLJ: Contexts and Multithreading By Jason Price A multithreaded program is one that is able to carry out several tasks in parallel using Java threads. As you will see in this excerpt from Java Programming with Oracle SQLJ, execution contexts are very important when writing a multithreaded SQLJ program. Sep. 13, 2001 Getting Up To Date with JDBC API By Jeff Brown Object Computing's Jeff Brown covers the JDBC 3.0 specification in its proposed final draft form, which promises to add more robust transactions by way of savepoints, a number of resource pooling enhancements, retrieval of auto-generated keys and a lot more. Aug. 21, 2001 Using Tomcat 4 Security Realms By James Goodwill In part 4 of his Using Tomcat series, James Goodwill covers Tomcat 4, focusing on security realms using both memory and JDBC realms (with a MySQL database example). Jul. 24, 2001 |
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