Using and Understanding Java Data Objects is an application
programmer's guide to the Java Data Objects (JDO) specification
recently accepted by the Java Community Process. JDO provides a
universal and transactional persistence service for objects. JDO
will store and retrieve objects of nearly any application defined
class using any data storage technology for which a JDO
implementation is available. JDO completely encapsulates the
details of the underlying data storage technology that is used. JDO
has its own query language (JDOQL) that allows the programmer to
find objects based on the fields and relationships of the object
model. The syntax of JDOQL is similar to the syntax of Java itself.
JDO increases programming productivity by simplifying and
minimizing the code that must be written to store and retrieve
object state. The use of JDO also allows the application to be
ported across different data storage technologies. Like the servlet
and EJB specification, JDO is a standard that will be implemented
by competing software vendors. Several JDO implementations are
currently available as third party products for relational
databases and object oriented databases. Using and Understanding
Java Data Objects is a guide to the features and uses of JDO. Part
I is a guide to the JDO API, the JDO metadata, and JDO's byte
code enhancement. Part II explains the use of JDO in several
application deployment scenarios, including stand-alone,
client-server, servlet, and EJBs. Part III is a tutorial explaining
the example programs and learning tools supplied with the book.
David Ezzio wrote his first application, which analyzed French elections, for a college professor in the 1960s. After a detour through philosophy and other pursuits, he has worked with software teams building desktop applications, character recognition software, and Internet-related software. He has worked exclusively with Java since 1997 and is a Sun Certified Java Developer. Dave founded his consulting practice, Yankee Software, in 1988 and helped found MaineJUG in 2001. He is a member of the JDO 1.0 maintenance group. Dave holds a bachelor's degree in mathematical logic from Yale University and a master's degree in philosophy from the University of Chicago. In his free time, Dave hikes, rides his bicycle, reads history, and sails his Laser Tippity. An occasional cook, he currently takes pride in his popovers. He lives in Maine, and you can contact him at dezzio@ysoft.com.
1- Overview; 2- Basic Concepts; 3- Queries; 4- Transactions and Caching; 5- Enhanced Classes and Managed Fields; 6- The Persistence Manager and Persistence Manager Factory Interfaces; 7- The Other Interfaces and Exceptions; 8- Passing JDO Objects by Value; 9- Designing the Business Service; 10- Tutorial: Using JDO with a Local Client; 11- Tutorial: Using JDO with EJBs, RMI, or SOAP; Glossary.
