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this is the result of a lock ) when I try to close the persistence manager, but only if 'retainValues' is set ... ) - locked (a java.io.BufferedInputStream) at java.io.FilterInputStream.read(FilterInputStream.java:83 ... ) Locked ownable synchronizers: - locked (a java.util.concurrent.ThreadPoolExecutor$Worker) "RMI TCP

Hi,   I realise that JPA2 doesn't necessarily define a standard API way for Lock Timeouts. However, there is a standardised query 'hint' that can be setup to make the underlying DB lock a record for a specific time. The hint property is: "javax.persistence. lock .timeout" I have a situation

Detached entity objects are objects in a special state in which they are not managed by any EntityManager but still represent objects in the database. Compared to managed entity objects, detached objects are limited in functionality: Many JPA methods do not accept detached objects (e.g. lock

, including: Avoiding vendor lock in - switching between implementations is easy. Technology

of the ObjectDB engine (not using one server process), thus bypassing ObjectDB internal file lock protection

ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing, etc.), but it uses an object oriented model to store and manage data. You can easily store ordinary

This chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: The next section explains how to use JPA for database CRUD operations: More advanced topics (e.g. locking and events) are discussed in the last section:

The ObjectDB Object Database ObjectDB is a powerful Object-Oriented Database Management System (ODBMS). It is compact, reliable, easy to use and extremely fast. ObjectDB provides all the standard database management services (storage and retrieval, transactions, lock management, query

 lockMode) Find by primary key and lock . Search for an entity of the specified class and primary key and lock it with respect to the specified lock type. If the entity instance is contained in ... if the lock method had been called on the entity. If the entity is found within the persistence context

.LockModeType Lock modes can be specified by means of passing a LockModeType argument to one of the javax.persistence.EntityManager methods that take locks ( lock , find , or refresh ) or to the Query.setLockMode() or TypedQuery.setLockMode() method. Lock modes can be used to specify either optimistic or