About Object Database

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Issue
13

Database access error , Doctor hanging on trying to repair, production shutdown at our biggest customer

, which is part of one large ObjectProperty object of 2699 bytes that was divided to two database ... we have a database shutdown, logs are showing: [2017-07-10 21:07:23 #1 store] Database 'F ... : SectionClassifier{2->merger[2699]-missing:1}     on running Doctor it hangs after reading in the database, just
Forum
13

em.flush(); em.clear(); loosing data and not persisting managed objects

objects to database. Sometimes it does other times it doesn't. Here is my Entity. import javax ... .objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o ... tracking management system called CMVC, since I don't have direct access to that database
Forum
13

OutofMemory error with Object DB 2.0

after persisting 200 records and then the same transaction object from the same PersistentManager ... .commit(EMImpl.java:279) at com.anritsu.eu.database.DatabaseImplementation.storeItem(Unknown Source) at com.anritsu.eu.database.DatabaseMessageStorer.newItemParsed(Unknown Source) at com.anritsu.eu
Forum
13

Speed of queries that return many objects

a standard database (or object database) activity. The main idea of a database is that large amount of data ... if this is something I should investigate. So I created a database with 1_000_000 dummy entities (example ... and tuning it could be in the range of 1-2 seconds. The overhead of preparing entity objects
Tutorial
13

Step 2: Define a JPA Entity Class

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New ... name + " (signed on " + signingDate + ")"; } } The new class should represent Guest objects in the database. Besides the @Entity annotation and the id field (and its annotations) - the Guest
Tutorial
13

Step 4: Add a Servlet Class

Guest entity object is constructed and stored in the database. All the Guest entity objects are retrieved from the database and stored in the request's "guest" attribute. Then the processing ... " attribute to generate the page output. Notice that operations on the database are carried on by the GuestDao
Tutorial
13

Step 4: Add a Servlet Class

that will be added in the next tutorial step) - a new Guest entity object is constructed and stored in the database. All the Guest entity objects are retrieved from the database and stored in the request's "guest ... on the database are carried on by the GuestDao session bean, which is instantiated and injected by
Issue
13

new objects not available in mappedBy associations

when the object is retrieved from the database again. Try to refresh the department object ... already contains a value - it will not be run again unless the object is retrieved again from the database ... > employees;   creating a new mapped class, e.g. new Employee, won't result in this object being available in
Forum
13

Entity listener - event instead of object

entity from database to check for difference in object fields? It should be something like creating ... in updated entity. There is a problem however with accessing "old" version of object stored in database. I can't find the nice way to use EntityManager in EntityListener. Because of that, I can't
Manual
13

JPA Named Queries

" that retrieves all the Country objects in the database: @NamedQuery(name="Country.findAll", query ... all the entity classes that have objects in the database. However, an attempt to use a named query ... mainly for Object Relational Mapping (ORM) JPA providers and less so when using ObjectDB