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Executing JUnit "all tests" throws "Object ... belongs to another EntityManager" Exception

#7' belongs to another EntityManager [Symbol:7] When I change the order in which the test runs (by

EntityManager.merge gives EntityNotFoundException

Just started using objectdb (2.3.4). Calling EntityManager.merge for a new (non-managed) object gives EntityNotFoundException. I am perplexed by this. See attached test case. Thanks for your assistance. Full error output is: Exception in thread "main" [ObjectDB 2.3.4] javax.persistence

javax.persistence.PersistenceException: No Persistence provider for EntityManager named in Karaf 4.0.7 and OSGi DS test

.persistence.PersistenceException: No Persistence provider for EntityManager named objectdb://localhost:6136

"No Persistence provider for EntityManager" in OSGI bundle.

provider for EntityManager named $objectdb/myDB.odb at javax.persistence.Persistence

multi EntityManager with Spring Boot, but 'Too many persistable types (>10)

I'm trying to use two EntityManager with Spring Boot, but no luck with 'Too many persistable types (>10) - exceeds evaluation limit' at second database. My purpose is converting database (converting model entity. same class name but different package). Single application with Spring-Boot 2.1.8

Creation of several EntityManager is slower

Creation of several EntityManager is slower

Locking in JPA

another EntityManager) since it was retrieved by the current updater. Optimistic locking ... another EntityManager instance) currently holds a PESSIMISTIC_WRITE lock on that database object. A PESSIMISTIC ... .lock(e1, lockMode1); em2.lock(e2, lockMode2); em1 and em2 are two EntityManager instances


objects into an EntityManager. Updating the relevant entity object fields within an active transaction ... them, but it should be used cautiously because bypassing the EntityManager may break its synchronization with the database. For example, the EntityManager may not be aware that a cached entity object in

InternalException during EntityManager.find()

InternalException during EntityManager.find()

JPA Lifecycle Events

(added to the EntityManager). @PostPersist - after storing a new entity in the database (during commit or ... - when an entity is identified as modified by the EntityManager. @PostUpdate - after updating an entity in ... the EntityManager. @PostRemove - after deleting an entity from the database (during commit or flush). An entity

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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