ObjectDB ObjectDB

Internal Website Search

71-80 of 200 resultsRefresh

Exceeding max connections and crashing

down and database lost connection with the JBOSS AS, several restarts got it up and running finally ... to implement closing of connection after every commit we make by the user? Q2. Our JBOSS AS frequently ... hype size to 6GB and since that we haven’t have any crashes of JBOSS. Important to note is that JBOSS

GROUP BY and HAVING clauses

to grouping by the GROUP BY clauses before arriving at the SELECT clause. GROUP BY as DISTINCT ... which returns the first letters as result. ObjectDB is very flexible in allowing JPQL expressions anywhere in ... all the JPA implementations. Grouping the Country objects makes them inaccessible to the SELECT clause as

ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection

console app for NetBeans8.1 provided, as explained below). To reproduce download the app and unpack ... as owner project.addOwnedElement(model); Element example = new Element ... .jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke

JPA Entity Fields

are always considered to be transient. Other fields can be declared explicitly as transient using ... store methods or code. Only the persistent state of the entity object, as reflected by its persistent ... type, including a generic java.lang.Object, as long as the type of the actual value at runtime

Eclipse Public License - v 1.0

brought by any other entity based on infringement of intellectual property rights or otherwise. As ... , such as lost profits; iii) states that any provisions which differ from this Agreement are offered ... notices contained within the Program. Each Contributor must identify itself as the originator

WHERE clause (JPQL / Criteria API)

objects to the SELECT clause for collecting as query results, the WHERE clause gets an opportunity to function as a filter. The boolean expression in the WHERE clause, which is also known as ... evaluates to TRUE are passed to the SELECT clause and then collected as query results. WHERE Predicate

JPA / JDO Class Enhancer

tracking of persistent field modifications, avoiding the need for snapshot comparison of entities (as ... (one-to-one relationship) have to be loaded eagerly. Special optimized methods are added to enhanced classes as ... file. You can run it from the command line as follows: > java -cp objectdb.jar com.objectdb

SSL Configuration

") specifies if SSL is used. As shown above, SSL is disabled by default. It could be enabled when accessing remote ObjectDB databases over an insecure network such as the Internet. SSL Keystore and Truststore Files To use SSL you have to generate at least two files: A Keystore file that functions as

Database Connection using JPA

instance obtained from the EntityManager. An EntityManager instance also functions as a factory ... of the createEntityManagerFactory method takes a map of persistence unit properties as a second parameter: Map<String ... the database file. Connection URL The createEntityManagerFactory method takes as an argument a name

JPA Criteria API Queries

JPQL queries are defined as strings, similarly to SQL. JPA criteria queries, on the other hand ... .g. as named queries) may be preferred. For dynamic queries that are built at runtime - the criteria ... An equivalent query can be built using the JPA criteria API as follows: CriteriaBuilder cb = em

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support