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RDBMS-ObjectDB Replication

Replication between ObjectDB and RDBMS will enable managing the same synchronized data in ObjectDB and in an external relational database, using a JPA ORM provider. This could be useful in systems that must use an RDBMS for other purposes, but need better performance for specific tasks. For systems that already use JPA - this feature might enable using ObjectDB as a performance booster, without writing new code.... ObjectDB as a performance booster, with almost no need to write new code. ObjectDB Support ObjectDB - Fast ...

 
forum_thread

JPA query of a Set of terms

Hi, Is it possible to write a JPA query to select objects that contain a collection of elements? For example, suppose I have a table that maps a search terms to pages: @Entity public class SearchIndex { @Index SearchTerm term; @Index Page page; } Now suppose I have an array of SearchTerm objects. ie. ... Hi, Is it possible to write a JPA query to select objects that contain a collection of elements? ...

 
forum_thread

Problem with polish characters

Hello! ... there are polish chars) But in this way I'm unnable to write polisch chars just on the site. When I use ISO-8859-2 or UTF-8 there are ...

 
forum_thread

Replaying recorded requests...

Hi, I get the following when ODB starts in embedded mode: Replaying recorded requests... then I get something like 500 lines of recordset information. Here is the relevant part of the config file: Questions: 1) Why am I seeing this if I've set recording enabled to false? 2) I... sync = "false" path = "." mode = "write" /> <processing cache = "64mb" max-threads = ...

 
forum_thread

zip file or JAR manifest missing

I found the message: Error opening zip file or JAR manifest missing: /E:/projects/ObjectDB/bin/objectdb.jar Some of projects can read the DB, but others can not read or write the DB. ... of projects can read the DB, but others can not read or write the DB. Exception in thread "main" [ ObjectDB 2.2.5 ...

 
forum_thread

Can't get arraylist/vector type attributes

I have a class that contains some attributes of type Vector (also tried with ArrayList and same happens). When I try to get an object from that class doing using the find method it works fine, I get the object. But when I call the close method to close the EntityManager the information from the Vector dissapears and I get an empty vector. ... weird happens, if BEFORE closing the entitymanager I write something like vector.size() or I print it's size or I do anything ...

 
api-jdo

PersistenceCapable.LOAD_REQUIRED

If jdoFlags is set to LOAD_REQUIRED, then the fields in the default fetch group cannot be accessed for read or write without notifying the StateManager.(Static Field of javax.jdo.spi.PersistenceCapable)

 
forum_thread

Order in WHERE Clause affects behaviour on DATE/DATETIME columns

Quick example:  public class MyClass { @Column(name = "myText") String myText; @Temporal(TemporalType.TIMESTAMP) @Column(name = "myDate") Date myDate; } Now, when querying the db with: ... as TemporalType.TIMESTAMP . But when I write following query: Query q = JPA. em ( ) ...

 
forum_thread

Memory Leaks after COMMIT operation (checked on versions 2.6.5 & 2.6.6.b01)

During import big logs we are observed some memory leaks inside of ObjectDb, so, could you explain what we did incorrectly or investigate how to fix it ASAP. Source code which causing memory leaks: ... ; } After executing code above (write a 10-15 Mbytes) need to check remaining memory in any available profiler. ...

 
forum_thread

How Should I Configure objectdb.conf to Obtain 256KB Disk IO Requests and Maximize Shared PersistenceManager Entity Cache?

These are questions asked in the context of the proposed architecture described in the forum thread titled, "Sample JDO Architecture for Follow Up Questions".   I tried to configure my objectdb.conf to give 256KB disk accesses and use PersistenceManager L1 ref=soft caching and datastore pagefile caching 1 MB (4 256KB sized pages).  The goal is to have frequent PersistenceManager L1 cache hit, then less frequent datastore pagefile cache hit, then when absolutely necessary, read/write from/to the disk, but in a 256 KB sized IO packets. ... pagefile cache hit, then when absolutely necessary, read/write from/to the disk, but in a 256 KB sized IO packets. Is ...