Re: [OJB-developers] Concurrent access not posible with 0.7.325 in C/S mode

[<ri...@ya...>]

Thomas,

Thanks, it worked!!!

In single VM mode I get this message:

[BOOT] INFO: OJB.properties: =
file:/C:/Java/Tomcat401/webapps/charlie-dev/WEB-INF
/classes/OJB.properties
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default


But It works. I can make two threads read data from the same table =
concurrently.


When I tried to run OJB in C/S mode, I got this exception:

[ODMG] ERROR: null
org.odmg.TransactionNotInProgressException
        at =
ojb.broker.server.PersistenceBrokerClient.commitTransaction(Persisten
ceBrokerClient.java:192)
        at ojb.odmg.oql.OQLQueryImpl.execute(OQLQueryImpl.java:230)
        at =
charlie.ojb.ProyectoManagerOJB.getEmpleado(ProyectoManagerOJB.java:39
0)
        at charlie.web.LogonAction.perform(LogonAction.java:49)
        at =
org.apache.struts.action.ActionServlet.processActionPerform(ActionSer
vlet.java:1786)
 <snip>


And in the C/S Console:
------------------------------

C:\charlie>java -cp =
c:\Charlie\build\WEB-INF\classes;lib/mm.mysql-2.0.8-bin.jar;
lib/jta-spec1_0_1.jar;lib/xerces-J_1.4.0.jar;lib/ojb-0.7.327.jar =
ojb.broker.serv
er.PersistenceBrokerServer repository.xml
[BOOT] WARN: no port specified, will use default: 2001
[BOOT] INFO: OJB.properties: =
file:/C:/charlie/build/WEB-INF/classes/OJB.properti
es
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[ojb.broker.metadata.RepositoryXmlHandler] WARN: unknown =
isolation-level: read-u
ncomitted using RW_UNCOMMITTED as default
[BOOT] INFO: PersistenceBrokerServer is accepting connections on port =
2001
[ojb.broker.server.RequestProcessor] ERROR: =
ojb.broker.server.Request@7725c4
[ojb.broker.server.RequestProcessor] ERROR: null



I suppose I would not need to use the Client/Server mode anymore, since =
now OJB is working in single JVM mode, concurrently... I do not need the =
load balancing stuff yet... What do you think?

I'll try to get some sleep (it's 3am here, I downloaded your patch =
almost inmediatly), and tomorrow I'll finish testing with more cases of =
concurrency of web clients.


THANKS for your great work!

Greetings,


Ricardo Arguello

----- Original Message -----=20
From: "Thomas Mahler" <tho...@ho...>
To: "Ricardo Arg=FCello" <ri...@ya...>
Cc: <obj...@li...>
Sent: Wednesday, February 06, 2002 1:20 AM
Subject: Re: [OJB-developers] Concurrent access not posible with 0.7.325 =
in C/S mode


> Hi Ricardo,
>=20
> I just placed a new release (0.7.327) on the OJB download page.
> I modified the PersistenceBrokerFactory and the ODMG implementation.
> Now in singlevm mode each transaction will obtain its own broker =
instance.
> During comit() or abort() the broker instances are released to a pool.
>=20
> I hope this will solve at least some of your problems.
>=20
> This is no release build. thus there are no TestCases yet that check =
the=20
>   implemented features. There may be bugs!
>=20
> HTH,
>=20
> Thomas
>=20
>=20
> _______________________________________________
> Objectbridge-developers mailing list
> Obj...@li...
> https://lists.sourceforge.net/lists/listinfo/objectbridge-developers
>=20