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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

>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

of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException

:241) - locked <13f2027> (a com.spiffymap.naviupdate.model.Repository) - locked ... (Thread.java:748) Locked ownable synchronizers: - locked <ff9a15> (a java.util ... (ServerCommunicatorAdmin.java:168) at java.lang.Thread.run(Thread.java:748) Locked

defines the default behavior for pessimistic locking. The persistence provider must lock ... , this entails locking the row(s) for the entity instance in the additional table(s). Entity relationships for which the locked entity contains the foreign key will also be locked, but not the state

/EntityManager/lock_Object_LockModeType" title="Method of javax.persistence.EntityManager">EntityManager.lock is used with pessimistic locking is used and the entity no longer ... > lock_Object_LockModeType" title="Method of javax.persistence

and relationships owned by the entity that are contained in join tables will be locked if the javax.persistence.lock.scope property is specified with a value of PessimisticLockScope.EXTENDED . The state of entities referenced by such relationships will not be locked

when an optimistic locking conflict occurs. This exception may be thrown as part of an API call, a flush or ... > lock_Object_LockModeType" title="Method of javax.persistence.EntityManager">EntityManager.lock(Object, LockModeType)