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Connections pool

Hi! Does ObjectDB keeps and reuses a pool of connections as MySQL JDBC driver does? I mean when it's used in a container like Tomcat, Glassfish, JBoss etc. Thank you. zmirc Mircea Chirac Yes. Every EntityManagerFactory instance manages a pool of connections and reuses them when it creates new

Many connections possible? and will it makes problem in future?

this should be handled by the application server or web server (GlassFish, JBoss, Tomcat) or by dedicated ... , but they are limited by practical factors such as thread numbers (depending on your operating

Web Framework Recommendation for leveraging JPA + ObjectDB

can switch Persistence Engines as I see fit later on ! So that I can easily switch to a true OODBMS ... are: Servlet container (Tomcat / Jetty) with servlets and JSPs. Java EE application server (JBoss

system exception occurred during an invocation on EJB GuestDao

) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) at org.jboss.weld.ejb ... ) at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke ... :582) at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke

UTF Error

.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184) at org.jboss.weld.module.web.el ... .jboss.weld.module.web.el.WeldValueExpression.getValue(WeldValueExpression.java:50) at com.sun ... ) at org.jboss.weld.module.web.el.WeldValueExpression.getValue(WeldValueExpression.java:50) at com.sun

ObjectDB 2.3.1

Added support for using ObjectDB with JBoss AS 7.0. Sample databases (world.odb, points.odb) included in ObjectDB distribution. New default Explorer colors (apply with Tools > Options > Fonts > Reset All). New menu for accessing local databases (in $objectdb/db) in the Explorer. Improved

ObjectDB 2.5.5

that is already running (avoiding further attempts). Fixed a memory issue with using ObjectDB with JBoss ... time zones. Fixed log archiving to affect only "odb*.log" files. Fixed an Explorer bug in displaying Integer embedded ID fields as Long.

ObjectDB 2.2.1

Added support for using ObjectDB with JBoss AS 6.0 / 6.1. Fixed several bugs in handling eager fetch. Fixed a pessimistic locking bug. Fixed a bug in using primary key fields in queries. Fixed a bug in queries on deleted objects before commit / flush.

ObjectDB 2.4.3

Added support for using ObjectDB with JBoss AS 7.1.1. Improved performance of merging managed entities. Fixed a deadlock. Changed license checks.


, this method returns the identity as of the beginning of the transaction. Parameters: pc - the calling ... the current transaction, this method returns the current identity as changed in the transaction ... transient instances made transactional as a result of being the target of a makeTransactional method

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.

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