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8

Performance in large transactions

Hello, we have a performance problem when we use a large transaction. Let's do exactly the same in several transactions the ObjectDB works much faster. In our use case, we create many new entities ... iteration. (In the query, we search for an item of type Entity2. However, there is only one entity
Forum
8

UserException: Invalid configuration in 'internal' - Check permissions

. With such information I have tried to create an entityManager, in each slave, as follows ... .UserException: Invalid configuration in 'internal' - Check permissions.: Is there any way ... ) at com.objectdb.jpa.Provider.createEntityManagerFactory(Provider.java:57) Exception in
Forum
8

Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

ObjectDB support, while the entities in a result set list from a JPQ query are initially managed ... of the container, and then in ObjectDB (but not in EclipseLink) lazy loading fails. The 3 possible solutions in the ObjectDB case seem to be: 1. Use explicit FetchType.EAGER on all desired collections
Issue
8

Schema-Update: Deactivation of automatic entity class removing and introduction of a new class remove in the schema config

Hello, in our application we use ObjectDB in embedded mode as part of the Profile ... design. The product can be installed in different configurations (in other words with more or ... of entites which are not found in the class path. With this background it would be very helpful
Forum
8

in-memory and on-disk support?

looking at replacing a setup of H2 where I have 40GB in-memory backed by 800GB on-disk, the 40GB in ... , the records at the end continuously purge as the new ones come in(duplicate write, one to in-memory and one to on-disk). Does ObjectDB offer a similar in-memory/on-disk option? I noticed the embedded and TCP
JPA Doc
8

Criteria Query From Elements

The interfaces in this group are in use for setting a criteria query FROM clause. Criteria Query Variables The FROM clause in JPA queries (as in SQL) defines the query variables. Query variables are represented in criteria queries by descendant interfaces of the From interface: Range variables
Manual
8

JPA Named Queries

dynamically into the query string and results in more efficient queries. @NamedQuery ... " that retrieves all the Country objects in the database: @NamedQuery(name="Country.findAll", query ... queries to the same entity class requires wrapping them in a @NamedQueries annotation, as follows
Tutorial
8

JPA Tutorials

tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA Tutorial Only basic Java experience is required in order to follow this tutorial. Web Application Tutorials The web application tutorials demonstrate how to use JPA in web applications. Understanding
Manual
8

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 other case. In addition, the Query interface defines a method for running DELETE and UPDATE queries
Manual
8

Server Configuration

is affected also by other elements in the configuration file, particularly the and the in the url connection string when connecting to the database (as explained in the JPA Overview section in chapter 3). The max attribute specifies