[Hibernate] Caching of densly related data

2003-08-27 Thread Micha Mosiewicz
I've been trying to estimate how caching would influence the performance of my app. This app has a lot of parent-child relationships in different configurations, i.e. each object have childs in a bag, and mapped (two one-many relations). During the test I've added about 1000 objects randomly

[Hibernate] build structure

2003-08-27 Thread Les Hazlewood
Gents (and Ladies?), I had my first experience with the full Hibernate build this morning, including the build of the HibernateExt and Tools modules. I thought things werewellyucky ;) I have a firm belief in leaving out jar files in a cvs repository, as that is not source code, and

[Hibernate] Connection Pooling / Connection Validation - best practices?

2003-08-27 Thread Dave Tilley
Howdy, I've been having trouble getting Connection Pooling working with either C3P0 or DBCP and using MySQL... the connection dies after some number of hours and the next time the webapp is used, it hangs, and an ioException is logged with a connection failure. I have been told there is some

Re: [Hibernate] Connection Pooling / Connection Validation - bestpractices?

2003-08-27 Thread Mark Woon
Dave Tilley wrote: I've been having trouble getting Connection Pooling working with either C3P0 or DBCP and using MySQL... the connection dies after some number of hours and the next time the webapp is used, it hangs, and an ioException is logged with a connection failure. I have been

Re: [Hibernate] Cascading inserts

2003-08-27 Thread Prasad Iyer
Thanks For the help really appreciate that. Wanted to ask one more thing is nested transaction possible in Hibernate. That is can I write code something like this. public void addCat()throws Exception{ Session session=null; Transaction tx=null; Cat cat=new Cat(Scarlet); cat.addKitten(new

Re: [Hibernate] Cascading inserts

2003-08-27 Thread Gavin King
No. Transaction.rollback() does NOT restore the state of the session to the state prior to Transaction.begin(). You should close the Session after rolling back a transaction. Thanks For the help really appreciate that. Wanted to ask one more thing is nested transaction possible in Hibernate.

Re: [Hibernate] build structure

2003-08-27 Thread Christian Bauer
On 27 Aug (10:13), Eric Pugh wrote: The avalon wrapper is built using Maven, and maven is called from the parent ant script that builds the rest of the extensions if you want to see an example. Please stop this discussion. The Hibernate core build process is fine. We don't need Maven, use it

Re: [Hibernate] CGLib problem

2003-08-27 Thread Konstantin Priblouda
--- Jim Downing [EMAIL PROTECTED] wrote: Hi, quick question - which version of cglib does hibernate-2.0-final.jar depend on? If anyone else is using maven for their builds, does either of the jars in http://www.ibiblio.org/maven/cglib/jars/ work with hibernate 2.0 final? cheers,

RE: [Hibernate] build structure

2003-08-27 Thread Gavin King
In my opinion: * splitting the tools out of the Hibernate core was the one of the best things we ever did - it keeps the download small enough and external dependencies under control (Hibernate was starting to look very bloated) * Maven looked great until I actually tried to use it and realized

Re: [Hibernate] Connection Pooling / Connection Validation - best practices?

2003-08-27 Thread Ludvig Omholt
On Wed, Aug 27, 2003 at 02:19:09AM -0400, Dave Tilley wrote: Howdy, I've been having trouble getting Connection Pooling working with either C3P0 or DBCP and using MySQL... the connection dies after some number of hours and the next time the webapp is used, it hangs, and an

Re: [Hibernate] build structure

2003-08-27 Thread Max Rydahl Andersen
The day maven can easily handle projects with multiple source directories (not just src, i mean modules/hibern8ide, modules/tools, modules/core) etc. Then I would consider to try using Maven...Maven is VERY monotlithic in it's structure - and that is exactly the opposite of what you are asking

Re: [Hibernate] Connection Pooling / Connection Validation - best practices?

2003-08-27 Thread Ludvig Omholt
FWIW: At our site we use this parameter in a Tomcat DBCP-resource with autocommit false if i recall correctly. We have not seen any losses of database connections. On Wed, Aug 27, 2003 at 07:37:46PM +1000, Gavin King wrote: Someone has claimed that this parameter doesn't work if autocommit is

Re: [Hibernate] build structure

2003-08-27 Thread Max Rydahl Andersen
i'll try looking into it again - but if they have seperate source directories without a common root, i'll be sad ;) Currently every plugin is self contained and has own source tree. But nothing prevents you to specify source directory somewhere else ( say, under hibernate source roor like:

RE: [Hibernate] build structure

2003-08-27 Thread Sandeep Dath
Les, Sounds interesting, but Java lib directories are getting ever more complex. Between the Jakarta set of tools and other little pieces that go into making a large framework tick - you can easily end up with version mismatches. $APP_HOMEs need consistent usage for them to work. My opinion is

RE: [Hibernate] build structure

2003-08-27 Thread Les Hazlewood
Title: RE: [Hibernate] build structure The über layout i'm looking for is: hibernate/modules/core hibernate/modules/core/etc hibernate/modules/core/src/java hibernate/modules/hbm2java hibernate/modules/hbm2java/etc hibernate/modules/hbm2java/src/java That is _exactly_ what I was

Re: [Hibernate] Connection Pooling / Connection Validation - best practices?

2003-08-27 Thread Dave Tilley
Ok, So it seems to me that to use C3P0, you must set the following four paramaters. hibernate.c3p0.max_size =maximum connection pool size hibernate.c3p0.min_size = minimum connection pool size hibernate.c3p0.timeout = maximum idle time hibernate.c3p0.max_statements =size of statement cache

Re: [Hibernate] build structure

2003-08-27 Thread Christian Bauer
On 27 Aug (10:00), Les Hazlewood wrote: Unfortunately, this approach does not solve the versioning dependencies, but at least it is a manageable approach to getting jar files out of cvs. Why do we want the dependent JARs out of CVS? -- Christian Bauer [EMAIL PROTECTED]

Re: [Hibernate] build structure

2003-08-27 Thread Max Rydahl Andersen
I like your ideas, but plesae do not mix hibernate and hibernateext again. If you want to improve something - then improve hibernateext build system. I already has the proposed structure (except avalon plugin which is partially maven (not good!)) And another point - please do NOT use

RE: [Hibernate] build structure

2003-08-27 Thread Les Hazlewood
Title: RE: [Hibernate] build structure -Original Message- From: Max Rydahl Andersen [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 27, 2003 10:34 AM To: Les Hazlewood Cc: hibernate list Subject: Re: [Hibernate] build structure I like your ideas, but plesae do not mix

Re: [Hibernate] Connection Pooling / Connection Validation - best practices?

2003-08-27 Thread Travis Reeder
The latest c3p0 has a new property, this is fromt he c3p0 developer a while back: I've added a new configuration property, idleConnectionTestPeriod, which if set to a number of seconds greater than zero, causes idle connections in the pool to be periodically checked, and discarded if they are

RE: [Hibernate] build structure

2003-08-27 Thread Schnitzer, Jeff
Les, you come from a heavy C/C++/make background eh? Env variables are pretty common in make-land but almost unheard of in java-land. To restate what Gavin just said as a hard requirement: Anyone with Java and Ant installed on their system must be able to check out the CVS tree and

RE: [Hibernate] build structure

2003-08-27 Thread Les Hazlewood
Title: RE: [Hibernate] build structure IMO, environment variables ensure that users can't build the project by simply checking out and typing ant. Please no environment variables! I will gladly adhere to the team's preferences, since I'm not a committer. :) But I'd like to explain

[Hibernate] Tables without primary key.

2003-08-27 Thread Fredrik Larsson
Hello. I would like to use hibernate and especially the criteria interface for an application that my company will be building. The problem is that the application will work against a legacy database (udb on mainframe) and that the tables contains no column marked as a primary key. Essentially

[Hibernate] feature request (?)

2003-08-27 Thread Serge Knystautas
I'm using Hibernate is a servlet container, and I have a servlet context listener that configures Hibernate. What I noticed was that I had to put the JNDI datasource location in both the web.xml (for JSTL and servlets to use) and in the hibernate.cfg.xml. What I did was a bit of a hack... I

[Hibernate] Tables without primary key.

2003-08-27 Thread Fredrik Larsson
Hello. I would like to use hibernate and especially the criteria interface for an application that my company will be building. The problem is that the application will work against a legacy database (udb on mainframe) and that the tables contains no column marked as a primary key. Essentially

RE: [Hibernate] build structure

2003-08-27 Thread Les Hazlewood
Title: RE: [Hibernate] build structure Les, you come from a heavy C/C++/make background eh? Env variables are pretty common in make-land but almost unheard of in java-land. Actually, I have a _deep_ foundation in Java with little C++ background. In fact, I have 3 times more java time