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What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in
FAQ
7

Which API should I use - JPA or JDO?

the availability of experienced developers, forums, IDEs support, tools, books, tutorials and sample
Manual
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JPA / JDO Class Enhancer

. Setting a Java Agent Enhancer in the IDE In Eclipse JVM arguments can be set globally at: Window
Result
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How to upgrade from ObjectDB 1.0?

). Refresh your IDE cache. Rebuild your project using the new jar file and enhance your classes using
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7

Posting to ObjectDB Website - Important Instructions

its strict JPA warnings (There is no ID defined for this entity hierarchy, The class
Forum
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Query in JPA2 with LEFT JOIN on INNER JOIN

How write a query in JPA2 with LEFT JOIN on INNER JOIN? select a.description, a.id, p1.description, p2.description,p3.description from action a left join action_profile ap1 on ap1.id_action=a.id inner join profile p1 on ap1.id_profile=p1.id and p1.name='?' left join action_profile ap2 on ap2
JDO Doc
6

javax.jdo.datastore.DataStoreCache

instance from the second-level cache. Parameters: oid - the object id of the instance to evict ... . Parameters: oids - the object ids of the instance to evict. Since: JDO 2.0 void evictAll(Collection oids ... the second-level cache. Parameters: oids - the object ids of the instance to evict. Since: JDO 2.0 void
JDO Doc
6

javax.jdo.datastore.DataStoreCache.EmptyDataStoreCache

the parameter instance from the second-level cache. Parameters: oid - the object id of the instance ... . Parameters: oids - the object ids of the instance to evict. Since: JDO 2.0 void evictAll(Collection ... the second-level cache. Parameters: oids - the object ids of the instance to evict. Since: JDO 2.0 void
JDO Doc
6

javax.jdo.PersistenceManagerFactory

setting. Since: JDO 1.0 String getServerTimeZoneID() Gets the TimeZone ID of the server associated with this PersistenceManagerFactory. Gets the TimeZone ID of the server associated with this PersistenceManagerFactory. If not set, assume that the server has the same TimeZone ID as the client. Returns
JPA Doc
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javax.persistence.GeneratedValue

conjunction with the Id annotation. The use of the GeneratedValue annotation is only required ... primary keys. Example 1: @Id @GeneratedValue(strategy=SEQUENCE, generator="CUST_SEQ") @Column(name="CUST_ID") public Long getId() { return id; } Example 2: @Id