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Glassfish 4 AbstractMethodError: com.objectdb.jpa.EMF.createEntityManager

/EntityManager; at com.sun.ejb.containers.EJBContainerTransactionManager.checkExceptionClientTx(EJBContainerTransactionManager.java:665) at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:507) at com.sun.ejb.containers.BaseContainer.postInvokeTx

Trouble bug on explorer

.java:6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java ... .retargetMouseEvent(Container.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492

ORDER BY clause (JPQL / Criteria API)

is always the last in the query processing chain. If a query contains both an ORDER BY clause

Chapter 1 - Quick Tour

that contains points in the plane. Each point is represented by an object with two int fields, x and y


situation so as to include relevant information (such as stack trace data). A throwable contains a snapshot of the execution stack of its thread at the time it was created. It can also contain a message string that gives more information about the error. Finally, it can contain a cause


that are contained in join tables will be locked if the javax.persistence.lock.scope property is specified ... , element collections and relationships owned by the entity that are contained in join tables ... the additional table(s). Entity relationships for which the locked entity contains the foreign key

Getting Started with JPA and NetBeans

. The distribution zip contains everything necessary (no external dependencies). The tutorial was written

Step 4: Create an ObjectDB Data Set

contains Point entity objects. We will use a simple JPQL query that retrieves points with x value in


should be a String containing a SQL SELECT statement. Since: JDO 2.0 void addExtension(String key ... space. The variableDeclaration parameter is the name of the variable containing the results ... containing one or more query parameter declarations separated with commas. Each parameter named in


- the file containing the Properties Returns: the PersistenceManagerFactory Since: JDO 2.0 ... . Parameters: stream - the stream containing the Properties Returns: the PersistenceManagerFactory ... containing the PersistenceManagerFactory context - the context in which to find the named

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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