ObjectDB Database Search

. This could be caused, for example, if the database is stopped (abnormally) during a writing action, and recovery

annotated with @Startup can access the database OK for both read and write , suggesting that the orm.xml

this architecture, write operations have to be directed to the master, where read operations

. If it is "all" you can save a lot of space (and improve performance) by switching to the " write " mode

updated. This should be fixed in future versions. The workaround is to write some code (even in

the vacuum. If there is no way to do this other than manually implementing code to read, delete, and write

I'm a newbie, so this is a pretty fundamental question. I'm not sure if there is a bi-directional relationship between the objects in memory and ObjectDB.  I know I can modify the objects and use persist() to write them to the database.  But does running a JPQL update or delete alter

Bhaskar There is no such API, but you can use a try-catch block. i.e. you can write code that tries

with embedded objects ? No such utility. After upgrading the schema you will have to write a small

to don't work properly. That's why I spent a lot of time to prepare the app and write

and a productive suggestion. I created a new feature request . You may subscribe to it and write additional

is started, and there are done some write operations before the slave database is started

Customer asked during opened ObjectDb connection (ODB location A) to stop writing and continue to another ODB file (Location B). Does exist some API to achieve that? What is a possible solution? Harman Alexander Golyshkin You have to close the database in location A, copy it from location

system? Thanks in advance! josevilla Jose Lora To populate the database you will have to write Java code

is also a Date member like r.startDateTime.   prolancer Emil Andonov As I was writing the previous

Hi, could someone recommend a good tool to use for data migration from SQLServer to ObjectDB. irene05 irene lan Unfortunately there is currently no such automatic tool. Using a JPA ORM library (e.g. Hibernate or EclipseLink) you can write your own conversion program that retrieves data from

Hello, I have a problem that I have not been able to solve, perhaps it is mild, but for me it has lasted for a long time. I am creating a test Maven project, with its dependencies, I am trying to write the log to the corresponding entity, and this error occurs. He sent them the project, the bug

-28 11:41:21,321 ERROR [http-nio-8080-exec-287 ConsumerHistoryDAO:183] - Failed to write consumer

.getTransaction().isActive()) {    em.getTransaction().begin();   }   // Write 100 000 entities with 1 child for each   for (int i=0;i

EmbeddedSystems The stack traces are related to issues with writing and reading from that database file

something (cos i have no other option than to write some shitcode) vachagan Vachagan

, pessimistic write locking). Your documentation seems unclear about that.   dmoshal David Moshal

on package.jdo file, this approach has advantage to writing constructors by hand, we skiped fields

, the system is attempting to write a page to the file even when that page is unavailable ( null ). To help

to prevent writing into disk for objectdb. So i can query from guava cachebuilder then objectdb. Do i

.util.*; public class Main { private static boolean WRITE _DATA_TO_DATABASE = false; public static

? Yes, if it has not been locked with pessimistic WRITE . , and will it see the old attribute? Yes

seem obvious to you? Thanks Brian (There is a complete re- write in the works but not ready for release

Hi, Doctor from latest build has some kind of deadlock when writing new version of database file: [378554] pl.hplxtool.model.Product(6):8936610 Referenced by:   - pl.hplxtool.model.Offer(46):8936608 [378555] pl.hplxtool.model.Product(6):8936616 Referenced by:   - pl.hplxtool.model.Offer

Hello, I raised this question earlier as well, we want to explore if I can run the ObjectDB completely in Memory ? (without any writes to Disk, it's okay to loose the data if the node is down ). I think that will give the best performance. The reason we are exploring is restoring state is possible

, and write code to convert from List to List , possibly in a PostLoad callback method . The second

-server connections. support Support What about database access performance (read/ write speed

I'm writing a multi-user drawing tool, using objectdb as the central store.  When a user press F5, I want to pick up all the changes from the database.  So, I call evictAll() in the following ways: pmf.getDataStoreCache().evictAll(); // the factory pm.evictAll(); // the persistence

cache hit, then less frequent datastore pagefile cache hit, then when absolutely necessary, read/ write

the entitymanager I write something like vector.size() or I print it's size or I do anything with the vector

How write a query in JPA2 with LEFT JOIN on INNER JOIN? select a.description, a.id, p1.description, p2.description,p3.description from action a left join action_profile ap1 on ap1.id_action=a.id inner join profile p1 on ap1.id_profile=p1.id and p1.name='?' left join action_profile ap2 on ap2.id

Hi all,   Honestly, I'm fairly new with JPA2 Criteria queries - but as far as code effort goes, it has saved me a bit of pain. I'm writing a dynamic query builder (only 1 level deep for basic entities) - but  even though I get most queries to work, I am getting the following error

after retrieving the BeitragVertragArt class, changing some fields and writing it back? The fix in _14

had operations resize.  It didn't have write permissions; permission added and ODB Doctor is working

is only in the Explorer. In the code you can write :     query.setHint("objectdb

show queries that scan data pages intensively can you write us the thread # that you mean. We did

could be a problem) hgzwicker Hans-Georg Zwicker " write " mode should be sufficient to reproduce

info. It is possible that the same exception is related to the performance issues and to the writing

for loops as sketched in post #6. For the next half I would to write something like MyValue v : s

more often to spread massive write operations.   support Support we do not see a link to the open

and LockMode set to PESSIMISTIC_ WRITE . This results in the exceptions below. Could you advise on the errors

will require writing a program that read all the objects from one database and store them in 

I have an entity object composed of an id, large data in the form of a string and the hashcode of the string as an index. The attached test saves 2000 of these objects, writing the data to a txt file as it goes. It then loops through the data from the file and queries for the entity id based

significantly, right ? If you write the recording to a different fast disk then the effect may not

that instead of throwing the exception will write information to the log and proceed (ignoring