Re: Loading an object

[Armin Waibel]

Hi,

Florin Pop wrote:

Hi again,

I have tried your suggested approach but curiously the same result.

The tests that I run consist just in loading an Person object from the data
source. Both with Hibernate and with OJB I use no cache and this load
operation is the first and only one opperation that I execute in one
session. So there is no object cached anywhere.
For me is also very surprizing the result.

For me too!

How does your test looks like?

long time = System.currentTimeMillis();
Person person = (Person) broker.getObjectByQuery(query);
time = System.currentTimeMillis() - time;
Can you post source of both test?

regards,
Armin

Regards,
Florin
PS: I have another question: is it possible in OJB to map an object field to
a calculated value. For example I have a birthday column in PERSON table and
I want to have in the Person class a field age containing the age of the
person(
age = currentDate - birthday, or something like this)
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 04, 2003 2:22 PM
To: [EMAIL PROTECTED]
Subject: RE: Loading an object
Hello,


-----Original Message-----
From: Florin Pop [mailto:[EMAIL PROTECTED]


I tried:

       Criteria crit = new Criteria();
       crit.addEqualTo("id", new Long(PERSON_ID));
       Query query = new QueryByCriteria(Person.class, crit);
       Person person = (Person) broker.getObjectByQuery(query);
but it works very slow, 6-8 times slower than in Hibernate:


I do not believe that. 

[..]


Is there another way for doing this in OJB? 


try:

Identity id = new Identity(Person.class, Person.class, 
                  new Long[] {new Long(PERSON_ID)});
PersistenceBroker.getObjectByIdentity(id);

Olli

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