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71

Time Sequence Object Command DB

We (www.s2ssystems.com) have a time-sequential object command database. I would like ... ) are create object, change object (fields), delete object, and object-method execution commands. Method commands are generally used to trigger creation of transient objects. The database can be branched
70

UserException - Object User#2 belongs to another EntityManager

CDI. Problem on method execution, which runs a NamedQuery: com.objectdb.o.UserException - Object 'com ... Chirac This exception is thrown only when mixing entity objects of different entity managers (which is forbidden, since every EntityManager manages its own space of managed objects, and a managed object
70

OutofMemory error with Object DB 2.0

after persisting 200 records and then the same transaction object from the same PersistentManager ... of the application it will show what objects fill the heap. But one possible reason ... , new objects are not released on commit automatically. This could be solved by calling JPA's clear or
70

Searching lists within objects

want to search using cb.isMember passing an object. This however does NOT work. I'm uncertain ... you can only match isMember if you have a database object. This does not help as I'm never going to have the real object at search time. Trying to use join is problematic as for every extra attribute I
70

GWT RPC is throwing serialization exception when I have object db date value

its Class object could not be loaded. For security purposes, this type will not be serialized.: instance ... for all of mine Data Transfer Object. But still I am getting this error. Note: (In gwt RPC you cannot use the Entity objects, You need srializable DTO objects to handle CRUD operations). kpanda ganesh gothai
70

collection of embedded objects

1. In general, are there any restrictions of the use of @Embedded objects in collections, compared to @Entity? 2. If you have a large nested collection of @Embedded objects, and you remove the parent ... of @Embedded objects more expensive (time) than searching through collections of @Entity? Thanks
70

2.7.3_03 Erroneous "Attempt to modify a primary key of a managed object"

key of a managed object", but my application is not trying to change the primary key. (ObjectDB log ... . You can still use StringIdentity to represent object IDs externally when a combination of class ... to save/restore the object into/out of the database. Another user might try to navigate and enter
70

Object comparation never matches

Hi! I'm trying to compare 2 identical objects in SELECT with no success: @Embeddable public ... ; Which is a part of Customer object: @MappedSuperclass @NamedQueries({     @NamedQuery(         name="authentication ... "     ) }) public abstract class Customer implements Serializable {     Object principal; The entity
70

How to access database object to my application.

Hi, I want to access a object which contains some value like id,name,college and address. Here it returns some address but i am not getting object value, i attach 3 java program below, please check. 1: GetterSetter method 2: Creating object for insert data 3: For Access data. Here object created
14

each 1-2 days objects on some objectdb level lock/block each other

queries without any object manipulation in these threads hgzwicker Hans-Georg Zwicker ... [0x000000007d76e000] java.lang.Thread.State: BLOCKED (on object monitor) at com.objectdb.o.PGC.p(PGC.java:256) - waiting to lock <0x0000000081367f88> (a java.lang.Object) at com.objectdb.o.SNP.u(SNP.java

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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