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Attach-Detach
Detach All On Commit Copy On Attach Serialization of Detachable classes JDO provides an interface to the persistence of objects. JDO 1.0 didn’t provide a way of taking an objec... -
Cleaning
Background Cleaning Retention Policies Configs Ways to trigger Cleaning Inline Async Run independently CLI Related Resources Background Cleaning is a table service emplo... -
Fetch Plan/Groups
Default Fetch Group Named Fetch Groups Dynamic Fetch Groups Fetch Depth Fetch Size When an object is retrieved from the datastore by JDO typically not all fields are retrieve... -
Annotations
@PersistenceCapable @PersistenceAware @Cacheable @EmbeddedOnly @Inheritance @Discriminator @DatastoreIdentity @Version @PrimaryKey @FetchPlans @FetchPlan @FetchGroups @... -
JDO v JPA
There are several competing persistence technologies available for Java. Two of these are “standardised” (via the JCP). When developing your application you need to choose the mos... -
SQL
Setting candidate class Unique results Defining a result type Parameters As we have described earlier, JDO allows access to many query languages to give the user full flexibil... -
JDOQL
JDOQL Single-String JDOQL Accessing Fields Data types : literals Operators precedence Concatenation Expressions Example 1 - Use of Explicit Parameters Example 2 - Use of Impl... -
PersistenceManager
Persist Objects Retrieve Objects Update Objects Delete Objects Making an object transient Any JDO-enabled application will require at least one PersistenceManager (PM). This ... -
Types of Fields
Supported Java Types First-Class (FCO) Types Second-Class (SCO) Types Simple Types Temporal Types Collection/Map Types Array Types JDO Attribute Converters Supported Java... -
Why JDO?
The majority of applications need to persist (or store) data during their lifecycle. There are many ways of doing this with an application written in Java. If your datastore is ...
