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5

find() delay

){         EntityManagerFactory emf = Persistence.createEntityManagerFactory(             "$objectdb/db/test.odb ... final class Test { public static void main(String[] args){   EntityManagerFactory emf
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Database(*.odb) file size on disk

.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.FlushModeType ... (String[] args) {   EntityManagerFactory emf;   emf = Persistence.createEntityManagerFactory
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EntityManager refresh problem

javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; import javax ... (dbFileName);         odbFile.delete();         EntityManagerFactory emf = Persistence
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Memory leak while merging parent with No Cascade annotation with children

.EntityManagerFactory; import javax.persistence.Id; import javax.persistence.ManyToMany; import ... (String[] args)  {         EntityManagerFactory emf = Persistence.createEntityManagerFactory
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Mysterious "Attempt to persist a reference to a non managed instance" error

.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.persistence.Persistence; import ... ) {     Enhancer.enhance("failing.*");       EntityManagerFactory emf = Persistence
5

Cannot sort descending, when ordering by caluculated float in a method

main(String[] args)     {         EntityManagerFactory emf =             Persistence ... ("javaapplication.*"); EntityManagerFactory emf = Persistence
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multiple LEFT JOINs do not work as expected

static void main(String[] args) {         EntityManagerFactory emf =             Persistence ... class T616 { public static void main(String[] args) { EntityManagerFactory emf
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Server connection management

can also be specified in properties map when instantiating the EntityManagerFactory. Currently the default pool ... {     public static void main(String[] args)     {         EntityManagerFactory emf
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Performance and memory usage of queries

; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax ... = 500000; public static void main(String[] args) {   EntityManagerFactory emf = Persistence
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Join performance in Objectdb

) {         EntityManagerFactory emf =             Persistence.createEntityManagerFactory ... ) {         EntityManagerFactory emf =             Persistence.createEntityManagerFactory

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?

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