Re: OpenJPA vs EclipseLink
Here we go: http://struberg.wordpress.com/2012/05/10/using-jpa-in-real-projects-part-1/ This just covers the project setup for now. But already contains a few neat tricks. I'll continue to work on the 2nd part collecting and outlining some concept issues and workaround options for the programming model in your apps. LieGrue, strub - Original Message - From: José Luis Cetina maxtorz...@gmail.com To: users@openjpa.apache.org; Mark Struberg strub...@yahoo.de Cc: Sent: Friday, May 4, 2012 4:58 PM Subject: Re: OpenJPA vs EclipseLink T hanks Mark, I'll be pendent for your post012/5/4 Mark Struberg strub...@yahoo.de Another such 'JPA performance test'I've seen was one using an Oracle database. The funny thing was that it did NOT use any additional SQL other than the generated one. Which means that ALL foreign key relations didn't have an Index set up! (Contrary to MySQL, Oracle doesn't automatically create indices for foreign keys by default) I'm not sure what I should think about a guy who is doing a 'serious' performance test without even getting the DB indexes setup correctly ;) I'll currently working on a blog article which describes how to make use of the openjpa-maven-plugin and sql-maven-plugin to efficiently handle databases in big applications. Not sure if I get it done before I travel to confess-2012 on sunday. Will keep you updated. LieGrue, strub - Original Message - From: Matthew Adams matt...@matthewadams.me To: users@openjpa.apache.org Cc: Sent: Friday, May 4, 2012 4:27 PM Subject: Re: OpenJPA vs EclipseLink ...or tests without your data... On Thu, May 3, 2012 at 4:28 PM, Mark Struberg strub...@yahoo.de wrote: or tests without any jdbc pool ;) LieGrue, strub From: afryer apfr...@hotmail.com To: users@openjpa.apache.org Sent: Thursday, May 3, 2012 11:27 PM Subject: Re: OpenJPA vs EclipseLink One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com. -- @matthewadams12 mailto:matt...@matthewadams.me skype:matthewadams12 yahoo:matthewadams aol:matthewadams12 google-talk:matthewadam...@gmail.com msn:matt...@matthewadams.me http://matthewadams.me http://www.linkedin.com/in/matthewadams -- --- *SCJA. José Luis Cetina* ---
Re: OpenJPA vs EclipseLink
...or tests without your data... On Thu, May 3, 2012 at 4:28 PM, Mark Struberg strub...@yahoo.de wrote: or tests without any jdbc pool ;) LieGrue, strub From: afryer apfr...@hotmail.com To: users@openjpa.apache.org Sent: Thursday, May 3, 2012 11:27 PM Subject: Re: OpenJPA vs EclipseLink One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com. -- @matthewadams12 mailto:matt...@matthewadams.me skype:matthewadams12 yahoo:matthewadams aol:matthewadams12 google-talk:matthewadam...@gmail.com msn:matt...@matthewadams.me http://matthewadams.me http://www.linkedin.com/in/matthewadams
Re: OpenJPA vs EclipseLink
Another such 'JPA performance test'I've seen was one using an Oracle database. The funny thing was that it did NOT use any additional SQL other than the generated one. Which means that ALL foreign key relations didn't have an Index set up! (Contrary to MySQL, Oracle doesn't automatically create indices for foreign keys by default) I'm not sure what I should think about a guy who is doing a 'serious' performance test without even getting the DB indexes setup correctly ;) I'll currently working on a blog article which describes how to make use of the openjpa-maven-plugin and sql-maven-plugin to efficiently handle databases in big applications. Not sure if I get it done before I travel to confess-2012 on sunday. Will keep you updated. LieGrue, strub - Original Message - From: Matthew Adams matt...@matthewadams.me To: users@openjpa.apache.org Cc: Sent: Friday, May 4, 2012 4:27 PM Subject: Re: OpenJPA vs EclipseLink ...or tests without your data... On Thu, May 3, 2012 at 4:28 PM, Mark Struberg strub...@yahoo.de wrote: or tests without any jdbc pool ;) LieGrue, strub From: afryer apfr...@hotmail.com To: users@openjpa.apache.org Sent: Thursday, May 3, 2012 11:27 PM Subject: Re: OpenJPA vs EclipseLink One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com. -- @matthewadams12 mailto:matt...@matthewadams.me skype:matthewadams12 yahoo:matthewadams aol:matthewadams12 google-talk:matthewadam...@gmail.com msn:matt...@matthewadams.me http://matthewadams.me http://www.linkedin.com/in/matthewadams
Re: OpenJPA vs EclipseLink
Thanks Mark, I'll be pendent for your post012/5/4 Mark Struberg strub...@yahoo.de Another such 'JPA performance test'I've seen was one using an Oracle database. The funny thing was that it did NOT use any additional SQL other than the generated one. Which means that ALL foreign key relations didn't have an Index set up! (Contrary to MySQL, Oracle doesn't automatically create indices for foreign keys by default) I'm not sure what I should think about a guy who is doing a 'serious' performance test without even getting the DB indexes setup correctly ;) I'll currently working on a blog article which describes how to make use of the openjpa-maven-plugin and sql-maven-plugin to efficiently handle databases in big applications. Not sure if I get it done before I travel to confess-2012 on sunday. Will keep you updated. LieGrue, strub - Original Message - From: Matthew Adams matt...@matthewadams.me To: users@openjpa.apache.org Cc: Sent: Friday, May 4, 2012 4:27 PM Subject: Re: OpenJPA vs EclipseLink ...or tests without your data... On Thu, May 3, 2012 at 4:28 PM, Mark Struberg strub...@yahoo.de wrote: or tests without any jdbc pool ;) LieGrue, strub From: afryer apfr...@hotmail.com To: users@openjpa.apache.org Sent: Thursday, May 3, 2012 11:27 PM Subject: Re: OpenJPA vs EclipseLink One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com. -- @matthewadams12 mailto:matt...@matthewadams.me skype:matthewadams12 yahoo:matthewadams aol:matthewadams12 google-talk:matthewadam...@gmail.com msn:matt...@matthewadams.me http://matthewadams.me http://www.linkedin.com/in/matthewadams -- --- *SCJA. José Luis Cetina* ---
Re: OpenJPA vs EclipseLink
Hi Andrew! When I did my first evaluations for a new project 3 years ago. Back then I was checking out the sources fo EclipseLink, Hibernate and OpenJPA. EclipseLink just didn't cut it at all. From what I've heard, the Eclipse community now rewrote a huge part of the code already, but they are imo still quite a few miles away from being production ready. I have honestly no idea how it could have become the RI for JPA... Hibernate is much better. It basically works pretty well and is also relatively fast. There is only one thing which I don't like that much and this is their subclassing approach for 'enhancement'. This has a few nasty side effects and you need to know them. I finally picked OpenJPA because it was (in my tests) the only JPA provider which was able to reliably serialize/deserialize entities without loosing state or trashing the database afterwards. I really need this because we have a real cluster environment and peak 5 mio page hits/day in our app, so not being able to serialize is a knock out. Of course you need a few magic properties in your persistence.xml: property name=openjpa.DetachState value=loaded(DetachedStateField=true)/ property name=openjpa.Compatibility value=IgnoreDetachedStateFieldForProxySerialization=true/ The problem with the other JPA providers was the following scenario: 1.) load from db 2.) change 3.) serialize (store in JSF @ViewScoped and wait for 2nd request) 4.) deserialize 5.) change in the JSF applyValues phase 6.) merge in a JSF action if you could change 5 and 6 then the other providers work as well. Too bad that doesn't fit the JSF workflow! OpenJPA accomplishes this by _still_ using a StateManager, even if the entity is detached. In EclipseLink this didn't work at all. In Hibernate it will work if you do _not_ use any Lazy Loading. Maybe that's the reason why HIbernate in the default modeeven ignores FetchType.LAZY in the top layer of your entity and always does eager fetching. LieGrue, strub PS: I'm using build-time-enhancement with the openjpa-maven-plugin - Original Message - From: Andrew Hastie and...@ahastie.net To: users@openjpa.apache.org Cc: Sent: Wednesday, May 2, 2012 8:56 PM Subject: Re: OpenJPA vs EclipseLink For information, OpenJPA it is also embedded with IBM WebSphere. On 02/05/12 19:25, José Luis Cetina wrote: Hi im newbie in OpenJPA i know OpenJPA is an implementation as EclipseLink, i always used EclipseLink, now im moving from Glassfish to TomEE and i see openjpa is embeded with TomEE, i read the OpenJPA manual and i like the innovations in openjpa, but i just want to know the advantages/disadvantages of openjpa, or a little comparative with openjpa vs eclipselink or hibernate, and one more thing about how fast is openjpa vs others.
Re: OpenJPA vs EclipseLink
One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: OpenJPA vs EclipseLink
or tests without any jdbc pool ;) LieGrue, strub From: afryer apfr...@hotmail.com To: users@openjpa.apache.org Sent: Thursday, May 3, 2012 11:27 PM Subject: Re: OpenJPA vs EclipseLink One thing to be aware of is if you see performance comparisons on the internet, make sure you know if the OpenJPA results are using openjpa enhanced classes or not. I've seen some very misleading stats comparing OpenJPA to other ORMs using non-enhanced classes. -- View this message in context: http://openjpa.208410.n2.nabble.com/OpenJPA-vs-EclipseLink-tp7521217p7525247.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: OpenJPA vs EclipseLink
For information, OpenJPA it is also embedded with IBM WebSphere. On 02/05/12 19:25, José Luis Cetina wrote: Hi im newbie in OpenJPA i know OpenJPA is an implementation as EclipseLink, i always used EclipseLink, now im moving from Glassfish to TomEE and i see openjpa is embeded with TomEE, i read the OpenJPA manual and i like the innovations in openjpa, but i just want to know the advantages/disadvantages of openjpa, or a little comparative with openjpa vs eclipselink or hibernate, and one more thing about how fast is openjpa vs others.
