About delete

issue

Eager Fetch of Map with Entities as Keys

Loading eagerly a map that uses entity objects as keys is currently unsupported, if the equals and hashCode method of the keys are based on the key entity content, since it is unavailable during instantiation of the map. The following test case demonstrates the problem: ... edit delete support ...

 
forum_thread

How to Use a SF with extended Persistence Context?

Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence Context emerges for the need to create queries in advance for fast execution so I need to store the queries and I need an EntityManager that doesn't get closed between calls. When I call the SF directly no problem happens but if I use SL to hold a reference to the SF I get com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active. ... edit delete dreckguy ... edit delete webel ...

 
manual

Database Connection using JPA

Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction.... that affect the content of the database (store, update, delete) must be performed within an active transaction. The ...

 
forum_thread

Database crash

just running objectdb we run into a crash situation as described in the attached log. What can be the reason for such a behaviour ?   ... edit delete hgzwicker ... edit delete support ...

 
manual

Database Management Settings

Explains settings and performance tuning of the ObjectDB Java object database for JPA/JDO. The <database> configuration element specifies back end (database engine) settings which are relevant on the server side and in embedded mode. The default configuration file contains the following <database> element: ...

 
api-jpa

javax.persistence.EntityManager

Interface used to interact with the persistence context.(Interface of JPA)

 
release

2.2.3

Release date: 2011-04-29 Download (5.07 MB) Binary:  objectdb-2.2.3.zip You should start by following a  tutorial or reading the manual ...

 
faq

How to install ObjectDB?

ObjectDB is distributed as a zip file. Just download and extract the ObjectDB distribution zip file. No need to run any install or setup program. You can uninstall ObjectDB by deleting the ObjectDB directory. ObjectDB does not modify the registry or ...

 
manual

ObjectDB 2.6 Developer's Guide

... Shows how to use JPA to store, retrieve, update and delete database objects. Chapter 4 - JPA Queries (JPQL / Criteria) ...

 
api-jpa

javax.persistence.OrderColumn

Specifies a column that is used to maintain the persistent order of a list.(Annotation of JPA)