About transaction

forum_thread

Pessimistic lock

Dear Sir or Madam, In the past we used the default Options in the JDO 1.0. See below for reference: javax.jdo.option.Optimistic=false javax.jdo.option.NontransactionalRead=true javax.jdo.option.NontransactionalWrite=false javax.jdo.option.RetainValues=true javax.jdo.option.RestoreValues=false Now we use the following options in DB2: ... Attempt to lock an entity object by retrieval when no transaction is activ." This is only in DB2. In DB1 this exception was not ...

 
faq

What is ObjectDB?

ObjectDB is an object oriented database management system (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing, etc.), but it uses an object oriented model to store an ...

 
page

About ObjectDB Database

ObjectDB is a powerful object oriented database management system (ODBMS). It is compact, reliable, easy to use and extremely fast. ObjectDB Object Database ObjectDB is a powerful object-oriented database management system (ODBMS). It is compact, reliable, easy to use and extremely fast. ObjectDB provides all the standard database management services (storage and ret ...

 
forum_thread

Unable to store AtomicInteger

In the docs, all serializable types should be persistable. However, when I tried to persist a field of type AtomicInteger, I got the following message: Message: Failed to commit transaction: Attempt to store an instance of a non persistable type java.util.concurrent.atomic.AtomicInteger I am using ObjectDB 2.6. Is this a bug? ... the following message: Message: Failed to commit transaction: Attempt to store an instance of a non persistable type ...

 
forum_thread

Insert time increases as db grows.

Hello, #1 2012-12-18 22:22 Hello, I've just installed ObjectDB and done some tests. I'm inserting 22k of records like 10k it ...

 
forum_thread

Exporting the data out of the ObjectDB

Hi, We are currently looking at ObjectDB for high performance / high volume transaction processing system. However we want to work on one of the aspects that is the data should be able to pulled out of the ObjectDB to some sort of Big Data File system or Relation DB for reporting / analytics purpose. ... looking at ObjectDB for high performance / high volume transaction processing system. However we want to work on one of the ...

 
api-jdo

Constants.RESOURCE_LOCAL

The value for TransactionType to specify that transactions are managed by the javax.jdo.Transaction instance, similar to the usage as documented in JSR-220.(Static Field of javax.jdo.Constants)

 
forum_thread

Saving custom list which implements java.util.List fails

Hi, I'm evaluating ObjectDB for storing Objects modeled with Eclipse Modeling Framework (EMF) and encountered the following problem:   I took the Point-example from the tutorial and added a list-attribute which is declared as java.util.List but the actual Object MyList just extends ArrayList as shown below. ... javax.persistence.RollbackException Failed to commit transaction: Attempt to store an instance of a non persistable type ...

 
api-jdo

getPersistenceManager(pc)

Return the associated PersistenceManager if there is one.(Static Method of javax.jdo.JDOHelper)

 
forum_thread

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

We persisted many entities in a transaction, unfortunately the heap reached its limit at any time although the flush and the GC were invoked regularly. The attachments show the memory heap dump of the biggest consumer. Which objects you would actually expect to remove by the garbage collector? Why the option objectdb.temp.page-file does not perform?   Options: <temp path="$temp" threshold="512mb" /> ... We persisted many entities in a transaction, unfortunately the heap reached its limit at any time although the ...