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Tutorial
14

Step 2: Entity Class and Persistence Unit

: src/main/java > guest). Use copy and paste to replace the new source file content ... guests in the database. We also need to configure JPA by setting a META-INF/persistence.xml file ... the new META-INF folder in the [Project Explorer] window, select New > File, enter persistence.xml as
Manual
14

Obtaining a JPA Database Connection

to get an EntityManager instance. JPA requires the definition of a persistence unit in an XML file in order ... persistence unit in an XML file or you can simply provide the file path of the ObjectDB database ... , but when using ObjectDB, any valid database file path (absolute or relative) is also accepted. Any
Issue
13

Database File Compression

ObjectDB database files are usually smaller than database files of other Database Management ... . Usually smaller files are also faster because less I/O operations are required and memory cache ... . So the effect of using compressed ObjectDB database file on performance is unknown yet.
Forum
13

DB Explorer and Doctor unable to open DB file

Hi, one of my DB files can not be open by neither DB explorer, nor the DB Doctor. Both are writing ... .data.RackModel (error 361)   My application can work with the DB file without difficulties ... recently upgraded from ObjectDB 1 to 2 and converted this DB file to the new format. Any ideas
Forum
13

Failed to write to ObjectDB log file

I get an Error message: Failed to create a new file 'file:C:\Programme\Cytoscape_v2.8.3\plugins\log\odb20130502.log my program is a Cytoscape plugin. ObjectDB has no permission to create a log file at the default path. Possible solutions: Change the location of the log files to another path. Grant
Forum
13

Heap Limit reached although the option 'objectdb.temp.page-file' is activated

? Why the option objectdb.temp.page-file does not perform?   Options: System.setProperty("objectdb.temp.page-file", "true"); Version objectdb-2.6.6_05 Caused by ... , CoverageCodeHarnessInterfaceObjectImpl, etc.). It doesn't seem related to objectdb.temp.page-file, which may work
Forum
13

Invalid file type for enhancement (error 104)

Trying to run enhancement, I get:    [ObjectDB 2.5.5_05] Invalid file type for enhancement: /home ... ) com.objectdb.o.UserException: Invalid file type for enhancement: /home/steve/java/spiffymap-svn ... is? It seems that you are trying to enhance source files rather than class files, as necessary. sjzlondon
Forum
13

Object explorer cannot open odb file. ObjectDB many-to-many relationship

file is created (in attachement) but I cannot open it with ObjectDB Explorer (Message: "Cannot open file 'demo.odb' null").  Note: I'm using Windows 7 64 bits. jdk1.6.0_27. ObjectDB doctor did not find any anormalie in the file I found the following log file: java.lang.NullPointerException
Issue
13

ObjectDB tries to create a File in a localtion without write access

Hello, if we install our Product into the windows Program Files directory which have by default ... : Failed to create a new file 'IndexManager_12.mrg_filter' at com.objectdb.o._PersistenceException ... .g(JPE.java:78) ... 25 more Caused by: com.objectdb.o.UserException: Failed to create a new file
Forum
13

Odb file version

Hi, Do we have any mechanism to knwo whether the odb file belongs to 1.x object db or 2.x object db. Before migrating all the odb files from objectdb 1.x to 2.x, i would like to add a check if it is already migrated. Any API which is exposed to check the odb files version ? There is no such API