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32

Suspected memleak caused by bad state of EntityManager

and using. We find a slow memleak in our application recently, and by trace of Entity construct and finalize, we found the problem is caused by bad state of EntityManager. After first throwing ... and retrieved by EntityManagerFactory, and the instances of Entity constructed by ObjectDB
32

Merge of entity classes with "mapped by" very slow

Hi, I have found a strange behavior when merging entities with "mapped by" set on @OneToMany ... - one with mapped by, second with adding entities list without "mapped by". The difference is huge event for such small objects - 2ms (without mapped by) vs ~50ms (with mapped by) Is there any chance
32

persistence.xml classes not respected by ObjectDB

of times. The lucky part is that I have the old DB on my development machine. By adding class by class ... class by class, as development went by. Providing an example is a little bit more problematic ... loading unspecified classes. If there is a bug and it could be demonstrated by a sample application
32

find repeated records by JPQL

.getResultList(JpaQuery.java:636) at image.cleanDB.main(cleanDB.java:19) Caused by: com.objectdb.o ... (QRR.java:197) at com.objectdb.jpa.JpaQuery.getResultList(JpaQuery.java:627) ... 1 more Caused by ... MySQL? TIA gzdillon Lai Yang Subqueries are not support by ObjectDB yet - see this feature request
32

Multi threading on DMOs by lazy loading

It is possible to use lazy loading on fields of attached entities by several threads? Example ... the identical instance of EntityZ. Thread1 access fieldX by lazy loading. Thread2 access fieldY by lazy loading. Thread3 access list by lazy loading. Does the multi threading access on different fields work
32

Connection is closed Caused by: java.io.EOFException

test case I use will pass most of the time but will fail after an undetermined period. Caused by ... ) ... 39 more Caused by: java.io.EOFException at com.objectdb.o.NTS.z(NTS.java:317 ... ();         }     } } Please check if your application might create EntityManager instances without closing them. By the way
32

How to disable use of graphic windows by objectDB

.main(Server.java:66) Caused by: java.net.UnknownHostException: GhostRider: Name or service not known ... .run(Server.java:107) at com.objectdb.Server.main(Server.java:66) Caused by: java.net ... (Server.java:66) Caused by: java.net.UnknownHostException: GhostRider: Name or service not known at java
32

how to query by properties of onetomany relations? (Error 990)

)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_23 (on Windows 7 6.1). Please report this error ... Ernst Sorry about the error message - it should be replaced by a more descriptive error message in ... using standard JPQL by setting the following query hint: em.setProperty("objectdb.query-language
6

Blocked by find

, Object obj)" method which is synchronized and attempts to load an object by id using the EntityManager ... .ObjectDbInstanceContainer@9c71a4 owned by: DEV1-WSAgent-1-Existing/3 Total blocked: 190 Total waited: 69 ... : Name: uatsrtlonw342-WSAgent-1-New/4 State: BLOCKED on com.objectdb.o.LKM@254e85f4 owned by: ODB
6

Bulk load of eager mapped by (inverse) relationships

When a collection of objects is retrieved by ObjectDB (e.g. by a query) ordinary referenced objects ... . However, inverse (mapped by) references that have to be loaded eagerly currently do not participate ... a separate client-server round trip. Future versions of ObjectDB should load eager mapped by (inverse

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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