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manual

[ODB1] Chapter 3 - Persistent Classes

Explains what a persistence capable class is and which types are supported by JDO.... JDO metadata declaration. Chapter 4 explains how to write the JDO metadata declaration. Aside from the requirements described ...

 
forum_thread

Sorting problem

Hi, I was rewriting our DAO to support pagging in large dataset and I think I have found a problem with sorting. I send you a test case - sorry for using the same project as previous, but it was faster to write this test case. As usual, you can load data with DataLoader and then check problem with QueryData. There is a simple query with "order by" sentence: ... using the same project as previous, but it was faster to write this test case. As usual, you can load data with DataLoader and then ...

 
issue

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 ...

 
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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 ...

 
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Managing software release cycles.

How do you manage software release cycles with objectDB? For example we might have different installation of a given web application, and we might need to introduce new fields with default values or to change something in the database "structure".  How can we apply the update script without downloading the entire DB file? Are there any command line tools like sqlPlus to connect to a DB and execute queries / scripts? ... by configuration. In some cases you may have to write code. You can use the PostLoad event to adjust old objects to new ...

 
forum_thread

java.sql.Time field off by 30 minutes

Hihi, I'm wondering if this is a bug. I have a simple entity with java.sql.Time field. On writing and readback, the field is found to be 30 minutes off. It is observed on objectdb explorer as well. Timestamp works perfectly fine. Ps. dont think its a UTC issue. My system is set at far off UTC+30min time.   #1 2012-03-07 01:28 Hihi, I'm wondering if this is a bug. I have a simple entity with java.sql.Time field. On wri ...

 
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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 ( ) ...

 
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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. ...