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Data Replication
There are times when you need to replicate data between datastores. In many cases datastores themselves provide a means of doing this, however if you want to avoid using datastore... -
Source Code
JDO Source Code Source Code Version Control Checking Out Code Web Site Specification JDO Source Code Source Code Version Control The ASF operates a dual hosting system for ... -
Object States
Detecting Object State Persisting an object Updating an object Deleting an object Possible state transitions JDO manages the lifecycle of an object, from creation (Transient ... -
TCK
Running the TCK Demonstrating Compliance In order to demonstrate compliance with the Java Data Objects specification, an implementation must pass all of the tests in the Technol... -
JDO v JPA : ORM
Relationships There are 2 prevalent specification in the Java ORM world. JDO provides the most complete definition, whilst JPA is the most recent. Relationships In this guide w... -
Bytecode Enhancement
JDO defines a byte-code enhancement process that provides for dirty detection of fields. Before a class is used at runtime it is compiled and then “enhanced” to implement the inte... -
MetaData
XML MetaData Annotations All variants of JDO support specification of persistence using XML MetaData. JDO 2.1+ adds on the ability to specify persistence using Java annotations.... -
Exceptions
JDOException Can Retry Exceptions Fatal Exceptions All exceptions raised by a JDO implementation are runtime exceptions which means that you can choose to catch the exceptions ... -
Project Team
Apache JDO Committers Apache JDO Contributors The people listed below have made significant contributions to JDO by working long and hard to make quality software for the rest o... -
Result
Result type Aggregates Example - Use of aggregates As we have seen, a JDOQL query is made up of different parts. In this section we look at the result part of the query. The re...
