About ObjectDB

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Tutorial
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Step 1: Create a Maven Web Project

Name (e.g. Guestbook) and select Java EE 5. Enter Maven Group Id (e.g. com.objectdb.tutorial.spring ... under Project Files in the [Project] window: To add dependency on the Spring MVC Framework and ObjectDB ... "> 4.0.0 com.objectdb.tutorial.spring Guestbook
Result
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Company

ObjectDB Software develops, markets and supports the ObjectDB Object-Oriented Database Management System (ODBMS). ObjectDB Software is the market leader in providing a very high performance ... ) standards, since ObjectDB is the first object oriented database with built in support of JPA and JDO
Forum
12

com.objectdb.o.NLV cannot be cast to com.objectdb.o.CMV

We are using ObjectDB 2.5.1_04. The following JPQL query causes an internal exception: SELECT ... '\')) The exception: Caused by: java.lang.IllegalStateException: com.objectdb.o.InternalException: Unexpected ... more                                                                                           Caused by: com.objectdb.o.InternalException
Manual
12

Database Explorer

ObjectDB Database Explorer is a visual GUI tool for managing ObjectDB databases. It can be used to view data in ObjectDB databases, execute JPQL and JDOQL queries and edit the content of databases. Running the Explorer The ObjectDB Explorer is contained in the explorer.jar executable jar file
Manual
12

JPA Persistence Unit

is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in ... ="my-pu"> My Persistence Unit com.objectdb.jpa.Provider ... >
Tutorial
12

Step 1: Create a Maven Web Project

project. To add dependency on the Spring MVC Framework and ObjectDB and to automatically download ... .0.0 com.objectdb.tutorial.spring Guestbook ... >      objectdb    ObjectDB Repository
Issue
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java.lang.ClassCastException: com.objectdb.o.SCU cannot be cast to com.objectdb.o.PRU

.objectdb.o.SCU cannot be cast to com.objectdb.o.PRU at com.objectdb.o.PPW.an(PPW.java:74) at com.objectdb.o.PGW.aj(PGW.java:220) at com.objectdb.o.UPT.C(UPT.java:134) at com.objectdb.o.URT.l(URT.java:171) at com.objectdb.o.TSK.i(TSK.java:145) at com.objectdb.o.TSK.f(TSK.java:95) at com.objectdb.o.TSM.e
Forum
11

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

in objectdb explorer ObjectDB 2.x is usually faster than ObjectDB 1.x, so it should be possible to get at least similar performance for this query with ObjectDB 2.x. Maybe an index is missing ... String commandLine = java -cp objectdb.jar com.objectdb.Doctor old.odb new.odb As i am doing
Manual
11

Locking in JPA

in ObjectDB (and in JPA) is always at the database object level, i.e. each database object is locked ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... , are detected earlier. Optimistic Locking ObjectDB maintains a version number for every entity
Manual
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Setting and Tuning of JPA Queries

ObjectDB the default is COMMIT (which is more efficient). The default mode can be changed by ... . Therefore, when performance is important, this issue has to be considered. Lock Mode (setLockMode) ObjectDB ... Hints ObjectDB supports the following query hints: "javax.persistence.query.timeout" - sets maximum