4:41 a.m.
Generate hibernate.cfg file from used persisted entities only
-------------------------------------------------------------
Key: HHH-2035
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035
Project: Hibernate3
Type: New Feature
Components: core
Environment: Hibernate 3.x + Hibernate annotations
Reporter: Holger Haag
Priority: Minor
Attachments: TwoPhaseLoad-writeUsedPersisters.patch, hibernate-template.cfg.xml
Original post from Hibernate forum: http://forum.hibernate.org/viewtopic.php?t=963888
The patch allows to call a new method TwoPhaseLoad.writeUsedPersisters which will generate
a complete hibernate.cfg configuration file containing only the entities which have been
persisted so far.
The rationale behind this is that for unit test cases it is often sufficient - and much
faster - to initialize hibernate with only a subset of all persisted classes, but it is
cumbersome to find out which subset is the smallest possible.
Attached is a SVN patch for the latest SVN trunk and a sample template file.
Feel free to modify/put it into the hibernate code in any way you want, I think it can
increase productivity - startup times for my test cases have dropped by 10 seconds.
Please note that this patch will only work if you use Hibernate annotations since the
generated XML file only contains class, not column mappings.
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6:14 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2035) Generate hibernate.cfg file from used persisted entities only
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035?page=c...
]
Max Rydahl Andersen commented on HHH-2035:
------------------------------------------
i like the idea, but:
1) Where are the code that actual add elements to the usedPersisters map ?
2) Does it work with associations ? (e..g if A point to B and only A is used, B is still
needed in your configuration)
3) Couldn't this be done via eventlisteners instead of mutating TwoPhaseLoad class?
Generate hibernate.cfg file from used persisted entities only
-------------------------------------------------------------
Key: HHH-2035
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035
Project: Hibernate3
Type: New Feature
Components: core
Environment: Hibernate 3.x + Hibernate annotations
Reporter: Holger Haag
Priority: Minor
Attachments: TwoPhaseLoad-writeUsedPersisters.patch, hibernate-template.cfg.xml
Original post from Hibernate forum: http://forum.hibernate.org/viewtopic.php?t=963888
The patch allows to call a new method TwoPhaseLoad.writeUsedPersisters which will
generate a complete hibernate.cfg configuration file containing only the entities which
have been persisted so far.
The rationale behind this is that for unit test cases it is often sufficient - and much
faster - to initialize hibernate with only a subset of all persisted classes, but it is
cumbersome to find out which subset is the smallest possible.
Attached is a SVN patch for the latest SVN trunk and a sample template file.
Feel free to modify/put it into the hibernate code in any way you want, I think it can
increase productivity - startup times for my test cases have dropped by 10 seconds.
Please note that this patch will only work if you use Hibernate annotations since the
generated XML file only contains class, not column mappings.
--
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9:14 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2035) Generate hibernate.cfg file from used persisted entities only
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035?page=c...
]
Holger Haag commented on HHH-2035:
----------------------------------
Hi,
thanks for your time.
1) Where are the code that actual add elements to the usedPersisters map ?
sorry, that was a mistake when I created the patch. I'll provide a new patch anyway.
2) Does it work with associations ? (e..g if A point to B and only A is used, B is still
needed in your configuration)
the new patch should... The entities are now collected in AbstractEntityPersister, which
seems to be a better place (the old patch used TwoPhaseLoad).
I've tried the following scenarios
- simple class mapping (1 class = 1 table)
- simple one-to-many (foreign key) relationship
- insert new objects
- search for existing objects
Not sure about other scenarios which I do not use though (e.g. many-to-many or
collections).
3) Couldn't this be done via eventlisteners instead of mutating TwoPhaseLoad class?
I'll leave the answer up to you ;-) Since I'm not that familiar with the hibernate
code, I've used a very simple approach. But I cannot help you on this issue very much.
I also haven't looked very much at performance or thread synchronization issues, since
I assume that calls to java.util.HashMap are pretty fast and even if two threads add the
same entity simultaneously, that shouldn't be a big issue.
Please note that the new patch now has a new class - org.hibernate.stat.PersistedEntities
- which covers most of the required functions. The patch to the AbstractEntityPersister
only contains one call to PersistedEntities. That should make it easier for you if you
want to use a different approach, e.g. the above mentioned listeners.
Generate hibernate.cfg file from used persisted entities only
-------------------------------------------------------------
Key: HHH-2035
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035
Project: Hibernate3
Type: New Feature
Components: core
Environment: Hibernate 3.x + Hibernate annotations
Reporter: Holger Haag
Priority: Minor
Attachments: TwoPhaseLoad-writeUsedPersisters.patch, hibernate-template.cfg.xml
Original post from Hibernate forum: http://forum.hibernate.org/viewtopic.php?t=963888
The patch allows to call a new method TwoPhaseLoad.writeUsedPersisters which will
generate a complete hibernate.cfg configuration file containing only the entities which
have been persisted so far.
The rationale behind this is that for unit test cases it is often sufficient - and much
faster - to initialize hibernate with only a subset of all persisted classes, but it is
cumbersome to find out which subset is the smallest possible.
Attached is a SVN patch for the latest SVN trunk and a sample template file.
Feel free to modify/put it into the hibernate code in any way you want, I think it can
increase productivity - startup times for my test cases have dropped by 10 seconds.
Please note that this patch will only work if you use Hibernate annotations since the
generated XML file only contains class, not column mappings.
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9:16 a.m.
New subject: [Hibernate-JIRA] Updated: (HHH-2035) Generate hibernate.cfg file from used persisted entities only
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035?page=all ]
Holger Haag updated HHH-2035:
-----------------------------
Attachment: AbstractEntityPersister.patch
PersistedEntities.java
New patch; The old TwoPhaseLoad patch should now be ignored.
Generate hibernate.cfg file from used persisted entities only
-------------------------------------------------------------
Key: HHH-2035
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035
Project: Hibernate3
Type: New Feature
Components: core
Environment: Hibernate 3.x + Hibernate annotations
Reporter: Holger Haag
Priority: Minor
Attachments: AbstractEntityPersister.patch, PersistedEntities.java,
TwoPhaseLoad-writeUsedPersisters.patch, hibernate-template.cfg.xml
Original post from Hibernate forum: http://forum.hibernate.org/viewtopic.php?t=963888
The patch allows to call a new method TwoPhaseLoad.writeUsedPersisters which will
generate a complete hibernate.cfg configuration file containing only the entities which
have been persisted so far.
The rationale behind this is that for unit test cases it is often sufficient - and much
faster - to initialize hibernate with only a subset of all persisted classes, but it is
cumbersome to find out which subset is the smallest possible.
Attached is a SVN patch for the latest SVN trunk and a sample template file.
Feel free to modify/put it into the hibernate code in any way you want, I think it can
increase productivity - startup times for my test cases have dropped by 10 seconds.
Please note that this patch will only work if you use Hibernate annotations since the
generated XML file only contains class, not column mappings.
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9:43 a.m.
New subject: [Hibernate-JIRA] Commented: (HHH-2035) Generate hibernate.cfg file from used persisted entities only
[
http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035?page=c...
]
Max Rydahl Andersen commented on HHH-2035:
------------------------------------------
the idea is good, but the impl won't be something we put into hibernate core.
if you want to keep the idea alive enter it into the tools project so we won't forget
it.
but in the end might just end up as something in the sandbox or our wiki.
Generate hibernate.cfg file from used persisted entities only
-------------------------------------------------------------
Key: HHH-2035
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2035
Project: Hibernate3
Type: New Feature
Components: core
Environment: Hibernate 3.x + Hibernate annotations
Reporter: Holger Haag
Priority: Minor
Attachments: AbstractEntityPersister.patch, PersistedEntities.java,
TwoPhaseLoad-writeUsedPersisters.patch, hibernate-template.cfg.xml
Original post from Hibernate forum: http://forum.hibernate.org/viewtopic.php?t=963888
The patch allows to call a new method TwoPhaseLoad.writeUsedPersisters which will
generate a complete hibernate.cfg configuration file containing only the entities which
have been persisted so far.
The rationale behind this is that for unit test cases it is often sufficient - and much
faster - to initialize hibernate with only a subset of all persisted classes, but it is
cumbersome to find out which subset is the smallest possible.
Attached is a SVN patch for the latest SVN trunk and a sample template file.
Feel free to modify/put it into the hibernate code in any way you want, I think it can
increase productivity - startup times for my test cases have dropped by 10 seconds.
Please note that this patch will only work if you use Hibernate annotations since the
generated XML file only contains class, not column mappings.
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