ObjectDB Database Search

implementations it is more efficient to use non collection references , to avoid a JOIN table (so a reference from ... ORM-based implementations. By the way, if you define the reference in Order , you can use an inverse ... , however, it is efficient to define the reference in either side. Therefore, the same definition

of B contain the field __odbTracker of type com.objectdb.o.EMT, which then holds a reference ... enhancement. The problem is the direct reference from com.objectdb.o.EMT to A that prevents garbage collecting of A instances (the reference com.objectdb.o.ENT is less important since after making

; Can you please advise on next steps? Thank you, Clinton   [12161] Page #26356937 has invalid reference from key 'AEA6C33' to child page #7 8764514. [12162] Page #27778657 has invalid reference from key ... reference from key 'A4F58B6' to child page #7 8764512. [12164] Page #33415486 has invalid reference

.springframework.orm.jpa.JpaSystemException: Failed to set reference value of field property at.co.pjm.tracker ... ._PersistenceException: Failed to set reference value of field property at.co.pjm.tracker.persistence.Unit ... (Thread.java:745) [na:1.8.0_72] Caused by: com.objectdb.o._PersistenceException: Failed to set reference

for circular references ) c. Binary - Select some objects, serialize the data to a binary file ... and more importantly managing a scrollable window - require at least loading all the references in advance ... is to put a reference 'this' in the symbol table referring to the current object, which would allow

Suppose you have an entity @Entity class A { ... } and other entities with references to A.   e.g. @Entity class B { A a; // explicit reference to A List list; // list of A's Set set ... an instance of A, even if a managed B has some reference to that A. When I then find the B instance

around with toString() and tracing these objects' references around I found an interesting bit of information that I didn't realize before. Apparently the object references stored in each of my EntityManagers ... only Employees with this Paygrade e.setPaygrade(p); //Update the Paygrade reference to an existing one p

: Failed to get reference value of field field db.Point.x using enhanced method (error 613)    ... .PersistenceException: com.objectdb.o.UserException: Failed to get reference value of field field db.Point.x using ... to get reference value of field field db.Point.x using enhanced method     at com.objectdb

are removed/deleted from the databases - it is the application responsibility to clear any references to them from other objects in the database (except references in inverse / mapped by fields ... during development and testing can help in identifying failures. If the Doctor reports broken references

test.Squad.athlets using reflection: Attempt to persist a reference to a non managed 'test.Athlet ... .athlets using reflection: Attempt to persist a reference to a non managed 'test.Athlet' instance at com ... .athlets using reflection: Attempt to persist a reference to a non managed 'test.Athlet' instance at com

references to your objects are always used (in order to detect future changes) and objects ... ).  ObjectDB doesn't hold strong references to hollow objects, so if your application doesn't hold strong references either - they can be garbage collected. support Support evictAll - i

(Finalizer.java:209) Locked ownable synchronizers: - None " Reference Handler" - Thread t@2 java.lang.Thread.State: WAITING at java.lang.Object.wait(Native Method) - waiting on (a java.lang.ref. Reference $Lock) at java.lang.Object.wait(Object.java:502) at java.lang.ref. Reference .tryHandlePending( Reference

a reference to a non managed com.epimss.lab.data.misc.OtherRqst instance (error 637) at com.objectdb.jpa ... default. Therefore, when you persist an object it must reference only objects that are already managed ... .objectdb.jpa.EMImpl.commit(EMImpl.java:277)  refers to JPA. Is this suppose to be there?  

responsibility to prevent broken references . When an OtherEntity object is deleted the application must also remove any references to it, including from the  setOfOtherEntities TreeSet . Broken references are not null values and they are more difficult to handle because accessing them cause exceptions

- one is the primary key (id) and so is different for each object, and the other is an object reference ... at the database log, the way the query is run is that all values of the object reference key ... number of the most recent objects, like this: select from Thing where reference == :objectReference order

not refer to a single project, but refers to the current workspace. To add objectDB lib ... which the objectdb.jar (when used as an OSGi bundle) exports types that enhanced classes reference ... & orm.xml) and has a reference to all bundles with entities. Basically this works. But only as long as

: The ref attribute specifies the reference type for holding non dirty entities in the persistence ... references in the persistence context (until commit or flush), regardless of this setting. Question : What exactly is the difference between "weak", "soft", and "strong" references ? dmoshal

references to such cached result objects ? or do ObjectDB exploits frequency of querying such objects ... (but the difference is not huge). You can either use application managed strong references or you can set the configuration , so strong references will be used automatically until the persistence context is cleared

a thread in the forum (form 2011 - http://www.objectdb.com/database/forum/286) that refers ... .jar file was included in the bundle that is supposed to reference it. I want to deploy objectdb.jar ... a service such that one simply needs to request a reference to the service? Would be nice

the relationship between Employee and Address as a Java reference field in  Employee or if it is bidirectional relationships also add a reference back from Address to Employee with a mappedBy setting. You can use either a to-one reference ( Address ) or to-many reference (e.g. List ). See the manual for more details. support Support

while still being able to cross reference objects on both, i.e. distributed database/graph of objects ? Kind Regards ... execution and multithreading in this previous thread . References from objects in one database to objects in another database are not supported. Applications can simulate such references by holding

API reference unique to ObjectDB, or is it an exact copy of some JDO 2.x API that I could find ... of API spec is the ObjectDB API reference based on? In other words, which one should I use when coding ... the ObjectDB reference . CBE CBE  It looks like JDO is the preferred API for me (because ObjectDB FAQs

is not necessarily a bad thing. If you are referring to the thread switching, it will not cause 10 ... -15%. If you are referring to something else, I'd like to understand better what you mean. Our tomcat ... .   natmaclin Natalia Levine If you are referring to the thread switching, it will not cause 10

references to the same instance of a class? It's hard to tell with the opaque code of ObjectDB. Exception ... : Attempt to persist a reference to a non managed Folder instance - field Folder.children (error 613 ... .persistence.PersistenceException: com.objectdb.o.UserException: Attempt to persist a reference to a non

between calls. When I call the SF directly no problem happens but if I use SL to hold a reference ... : The GuestDao is a SF with an extended persistence context. the GuestServlet holds reference to a SL called ... of the GuestDao. The GuestUpdater holds reference to the GuestDao who can now give guests from the DB

, running the doctor, shows this: Missing Objects (Broken References ... objects while keeping references to them, which creates dangling (broken) references in the database

references , so as soon as you release  your own references to these entity objects ... released, please provide a heap dump. support Support Yes we know about WEAK REFERENCEs in ObjectDb

IDs instead of references , which is not recommended when using JPA. It seems that a Meta instance holds the IDS of an Image and a Page instances instead of direct references . A more JPA conventional ... that it would help for this specific query.  I have no reference to set in the Meta, unless

completely. Although in the result appeared some broken references but only in one particular class ... .................................... 2873MB (total) File has been converted successfully (Time: 301 seconds) Broken references ... broken references More information can be found in the log Relevant part from the log file: [2014-05-06

)。 Is ObjectDB also provided JCA util just like DataNucleus? Reference ：     Spring Framework Reference Documentation       JCA, JTA, and JDO Transactions - Using ... . The solutions that are described in your references have never been tested in ObjectDB

? With a 'em.merge()', you have to take care to assign the reference passed back because it will be different to the one you passed in (it is also attached). This new reference will contain the updated version ... made to the reference are also made to the original instance, hence always in sync? I could likely

.deletePersistent()), I am allowed to do so. Since the person is referred to from the company, I ... , and therefore, it is the application responsibility to avoid broken references (e.g. caused by deleting an object but keeping a reference to it). Regarding cascading operations, even if you use JDO

keys, another advantage of long PK over String UID PK that was not mentioned yet: All references to the objects (in reference fields in other objects) and all the indexes use the PK to reference

_04] javax.persistence.RollbackException Failed to commit transaction: Failed to get reference value ... .PersistenceException: com.objectdb.o.UserException: Failed to get reference value of field field image ... .objectdb.o.UserException: Failed to get reference value of field field image.MetaSogou.iHei using

Category but they are all refering to same limited set of Category entities (via ID). There is not ... to contain some kind of " reference " to the category entities rather than trying to save these entity twice ... How do you initialize the categories of a new product? You should retrieve references to existing Category

and on your EclipseLink to ObjectDB migration) I have to refer to some external EclipseLink/TopLink ... . To find any reference to the matter one has to examine the JPA2 spec Final: 7.6 Container-managed ... is created. This specification refers to such persistence contexts as transaction-scoped

, if you create EntityManagerFacotry instances but do not close all of them, or still have strong references ... using strong references and somehow still reference EntityManager instances. To check

though seems to show that the reference to the object is good and that the object does indeed exist.   Output from Doctor ... showing the reference to the object and the existence of the object. CBE CBE There is indeed a problem ... request consideration. CBE CBE The 64KB limit is due to references to page entries in a page

= "device") because I don't have a back reference from log to device! ----- @Entity public class Device ... an inverse mapped-by relationship . Use a regular reference from Log to Device and mapped-by List field in ... when needed. For that query to be efficient you may want to have an index on the reference field from Log to Device. support Support

(Finalizer.java:209) Locked ownable synchronizers: - None " Reference Handler" - Thread t@2 java.lang.Thread.State: WAITING at java.lang.Object.wait(Native Method) - waiting on (a java.lang.ref. Reference $Lock) at java.lang.Object.wait(Object.java:502) at java.lang.ref. Reference .tryHandlePending( Reference

that reference integrity is not broken and there are no dangling references . Future versions of ObjectDB should support reference integrity. support Support *VERY* important feature for any serious db app ... most. And the only thing that blocked me from transfer to ObjectDB. huyi Ray Hu As indicated above, reference

, following errors occurs: Caused by: com.objectdb.o._PersistenceException: Failed to set reference value ... by: com.objectdb.o.UserException: Failed to set reference value of field field eu.ysoft.safeq.core ... /23 09:25:26.156 | Failed to set reference value of field field eu.ysoft.safeq.core.cache.entity

look as the same exception. At least this one seems to be related to broken references . The Doctor detects many broken references in this database. Notice that currently ObjectDB doesn't enforce reference integrity and it is the application responsibility to avoid deletion from the database

. I am not sure which reference causes the NullPointerException . The only reference in that line ... miss. On the next line other references that are related to the inverse field are used. Maybe that inverse reference field has special type or setting causing this problem.   support Support I've

, except references from  CacheableJobStat instances to deleted  CacheableJobLog instances. This requires fixing the application (making sure that references to deleted objects are removed to avoid broken references ), but it doesn't seem to be related to the reported exception

the following explanation I will refer to the (bi-directional) ownedElements List of the Element class ... and lazy references are not expected to be loaded before detachment. You may ask - why EclipseLink works differently in this case? Good question but you will have to refer it to the EclipseLink guys

. It seems that there is a problem with some heavy objects that ObjectDB manages using  reference counting. Somehow in an unknown situation the reference count drops to -1 and then the objects are pinned ... . It should solve the problem by blocking an attempt to decrease the reference count below 0. In addition

be released.  Below is the reference graph for them. Normally we would expect to see some service or helper class which accidentally holds references to those. But here we have only WeakReference ... BTC EmbeddedSystems It is unclear from these images if there are paths of strong references from

. However, inverse (mapped by) references that have to be loaded eagerly currently do not participate in a bulk load, which means that every reference requires running a separate query and doing ... ) fields in bulk as well. support Support Bulk load of eager mapped by (inverse) singular references is now supported in build 2.4.4_13. support Support

) produced no errors. Running the Doctor on the database at #5 (today) produced some broken references errors ... . There is one application level error: Broken References : [1] com.agile.hummingbird.ObjectNode(2 ... except the expected broken references . The problematic object gets a new Action object linked into