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Forum
16

Soft Reference Object Cache Recommendation

size limit being exceeded before the post attempt.  =(  ) I desire to have my persistent objects ... objects before more recently accessed ones.  I attempted to use Java SoftReference to my large byte[] and instruct ObjectDB to use soft reference for its Level One (L1) object data cache.  I disable the L2
Manual
15

Paths and Types in JPQL and Criteria API

as arguments. Path expressions that navigate from one object to another. Instances of user defined ... ) and uses the dot (.) operator to navigate through persistent fields to other objects and values. For example - c.capital, where c represents a Country entity object uses the capital persistent field
Manual
15

Running JPA Queries [2011-09-21]

when exactly one result object is expected. Query.getResultList - for general use in any other case ... - for use when exactly one result object is expected. TypedQuery.getResultList - for general use in any ... (with getResultList) The following query retrieves all the Country objects in the database. Because multiple
Manual
15

Running JPA Queries

when exactly one result object is expected. Query.getResultList - for general use in any other case ... - for use when exactly one result object is expected. TypedQuery.getResultList - for general use in any ... (with getResultList) The following query retrieves all the Country objects in the database. Because multiple
Issue
15

new objects not available in mappedBy associations

> employees;   creating a new mapped class, e.g. new Employee, won't result in this object being available in the same transaction: ie: for (Employee e : department.employee) won't include the new object ... when the object is retrieved from the database again. Try to refresh the department object
Forum
15

Speed of queries that return many objects

and tuning it could be in the range of 1-2 seconds. The overhead of preparing entity objects is more than you may expect and much slower than just reading the data from the disk. Using embedded objects or report queries (which return fields rather than entity objects) may help. If you can load the data
Forum
15

Entity listener - event instead of object

in updated entity. There is a problem however with accessing "old" version of object stored in ... @ElementCollection private Set activities; This way I can add events to given object without using EM to persist new object. What I want to accomplish is to log difference between new and old values
Forum
15

ClassCastException of same object type

I have ObjectDB partially working with my project. At the moment it seems to be saving objects and retrieving objects ok in the main project. However, when I make a plugin for the project, the new objects are persisted but not retrieved. I get the following error: java.lang.ClassCastException: org
Forum
15

Time Sequence Object Command DB

We (www.s2ssystems.com) have a time-sequential object command database.  I would like ... ) are create object, change object (fields), delete object, and object-method execution commands.   Method commands are generally used to trigger creation of transient objects.  The database can be branched
JDO Doc
15

javax.jdo.PersistenceManager

. This exception contains a nested JDOOptimisticVerificationException for each object that failed ... 1.0 void deletePersistent(Object pc) Delete the persistent instance from the data store. Delete ... . The data store object will be removed at commit. Unlike makePersistent, which makes the closure