Pete, I would really suggest using the Hibernate 2nd level cache for caching,
it is a simple solution.
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I'm a bit puzzled as to why my custom resource loader isn't being called for
anything other than page resource bundles. I'm using Seam 2.0.0.GA with Java 6:
components.xml
| ...
| component name=org.jboss.seam.core.resourceLoader
| property name=bundleNames
|
Ok I've solved that problem. Now I have a problem with seam caching resource
bundles.
I'm using Java 6 to do my resource bundle caching, so I want to remove, disable
or override the following method in org.jboss.seam.core.SeamResourceBundle.java:
|private Listjava.util.ResourceBundle
It would be nice if someone would like to post a complete example for this
including caching.
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I blogged about this - see further up the topic. You should cache using the
Hibernate 2nd level cache.
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Yep. Query hints for enabling a 10 minute cache worked out fine.
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I would use the hibernate query cache - this is exactly the kind of scenario
its designed for - and set the query cacheable e.g. for 15 minutes.
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Sorry, I'm so used to you being clairvoyant ;-)
I have a reload method which reloads the cached messages
| @Name(org.jboss.seam.core.resourceLoader)
| @BypassInterceptors
| public class DBMessages extends ResourceLoader {
|
| @Observer(reload_messages)
| private void
Check your startup logs and make sure that your
org.jboss.seam.core.resourceLoader component is definitely using DBMessages.
Otherwise, try breaking around line 60 of org.jboss.seam.crore.Events and see
if you can trace why you get that exception.
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Ah, no, its that the method must be public.
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Ngh. Of course. Thanks.
Did you BTW come to any consensus regarding the caching? For some reason I seem
to get different instances of the resource loader (my cache-map is always empty
even if the scope is application). Would I have to inject the data from
somewhere else?
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Any theories/comments?
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Post code - no idea what you are doing.
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Hi,
I've created a light version of the database-resources and put an
@Observer(reload_messages) in my class but when I raise the event, seam
expects it to be found in the superclass and throws an method not found:
reload for component: org.jboss.seam.core.resourceLoader. Do I have to fiddle
@Scope(APPLICATION)
| @BypassInterceptors
| @Name(org.jboss.seam.core.resourceLoader)
| public class ExtendedResourceLoader extends
| org.jboss.seam.core.ResourceLoader {
|
| /**
| * Method called to load a bundle
| * @param bundleName the name of the bundle to
Nice article, making things way easier than implementing a lot of class to do
the controls.
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Great job! This should go in the wiki page.
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Though it's a nice article and helped me simplify the whole stuff, it doesn't
really speak about my mine problem: the caching issue.
Say, starting with your example, that I want to cache every locale's bundle,
and reload them only if they have changed (tagged as 'dirty').
Then, how to 'stay'
Ok, the only way I managed to do it yet is to check inside the private
ResourceBundle class if the Locale is dirty using a singleton Control class
every time the handleGetObject method is called.
Seems to work at the moment, but I'm really not sure it's either elegant or the
best way to do it.
How are you caching them? I can perhaps extend the tutorial.
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Great job, Pete. Thank you s much.
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This seems like a useful thing to do. I'll try to write up a tutorial based on
this thread over the next few days.
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Ok, then I must do something wrong, that's for sure.
I have overriden 2 classes:
ResourceLoader and MessageFactory
ResourceLoader:
@Scope(SESSION)
| @BypassInterceptors
| @Name(org.jboss.seam.core.resourceLoader)
| public class ExtendedResourceLoader extends
|
No, the resourcebundle should be reloaded due to Messages being reloaded in the
current design of this in CVS.
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Yes, I've noticed it and I manage to reload a resource bundle using that, but
it doesn't change the actual resourceBundle.instance(), which means if I'm
changing my locale again, the resourceBundle will be back to its dirty state.
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I wrote this up:
[url]http://in.relation.to/Bloggers/StoringYourMessagesInADatabase[url]
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Another revival since I still can't find a way to make my 'dirty' thing works.
I don't know where to hook to change the code in order to reload the
resourceBundle from the database.
I tryed some different things using the messageFactory class, but couldn't work
out with it.
Basically, I'd need
Observer org.jboss.seam.localeSelected
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Hey guys!
Sorry about the revival, but with the new ResourceBundle implementation in the
last Seam CVS, I'm kinda lost.
I modified my implementation trying to get it working, but somehow I never
manage to get the 'ResourceBundle.instance()' to change.
I can easily load whatever language I
Actually, I've worked around the problem, since we just need to override
ResourceLoader loadBundle method, but now I have a problem about the caching to
reload the messages when I set a locale as 'Dirty'.
Before the last changes, I was using an implementation or
international.Message, but I
Thanks for your message, I couldn't retrieve my EntityManager.
Finally, I managed to get it working, and I think what I did if pretty much
what you did, except I didn't change that much the component processes, such as
the caching which I'm using.
But your needsReload method seems very useful
For the needsReload method, I implemented a public boolean isDirty(Date
lastLoaded) on the resource bundle entity. It simply compares the lastLoaded
date to the last modified date stored on the entity (which is updated each time
a message in the bundle is updated).
If you do decide to reload
You can also retrieve the entity manager by calling:
| EntityManager em = (EntityManager) Component.getInstance(entityManager,
true);
|
Sorry that this posting is delayed, it sounds like you're pretty much there.
But here is a more expanded version of the steps I outlined earlier.
Ok thanks.
I don't know if I did it the right way though, but it seems to be working, and
I tryed to follow peter's steps (page1) as much as possible.
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Just one question though, I'm trying to retrieve the connection String to the
Database (aswell as user and password) used by Hibernate (and set in the
persistence-xml) dynamically, so that I just have to change it there later on
(since I'll use plain java to access my db with my resource
I up the topic cause I still couldn't implements that DataBase Resource Bundle.
I now have all the needed classes, following the steps described by pbrewer_uk,
but I'm having trouble knowing what code to implements in what class. For
example, I don't know what DBControl class is exactly
Zerg-Spirit wrote : Moreover, I don't know how to set up my Resource Bundle
to be used instead of the default one (using Seam 2.0).
Give it these annotations:
@Scope(ScopeType.SESSION)
| @BypassInterceptors
| @Name(org.jboss.seam.core.resourceBundle)
| public class MyResourceBundle
Thanks, it helped me a lot!
Now, I kinda understood how it's working, but my very last problem is pretty
tough: I can't retrieve the EntityManager in my Session Bean extending
ResourceBundle.
@Stateless
| @Scope(SESSION)
| @Name(dbResourceBundle)
| public class DBResourceBundle extends
1) You will need to use *exactly* the @Name annotation I gave you, otherwise it
won't replace Seam's resource bundle.
2) Use an @PostConstruct/@Create method rather than doing it in the constructor
- injected resources are never available in the constructor.
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The class I pasted isn't the one extending Seam ResourceBundle, but
java.util.ResourceBundle.
I'll try with a @Create annotation then!
Thanks.
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Still can't make it work.
I changed my bean so that it's now a SFSB (in order to use @Create):
@Stateful
| @Name(dbResourceBundle)
| @Scope(SESSION)
| public class DBResourceBundle extends ResourceBundle implements
iDBResourceBundle{
| ...
Here's the @Create method:
@Create
|
Sorry for the triple post, but I just found something strange to me.*
I actually managed to call the @Create method by calling the bean on the jsf
page (I simply put an outputText with a property of my Bean as value).
Since I've done that, the @Create method is now called, apparently the bean is
Ok, sorry again for the multi posts, but I think I finally found out what was
wrong.
I think I simply can't retrieve my EntityManager by injection at all.
Here's what I understood.
First, seam load the overrided Seam.ResourceBundle:
@Scope(SESSION)
| @BypassInterceptors
|
No. If you do it like that, you won't get managed objects.
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Hi,
I'm trying to have my resource bundles stored in a database aswell, and wanted
to follow pete's post, but I don't really understand some part of it.
What do you mean by:
anonymous wrote : 3. Implement a DBContol (to control caching of the resource
bundle)
What's that? Is it supposed to be
I have implemented a database resource bundle using entities in Seam - its too
verbose to post, but here are the steps to implement it:
1. Create the entity beans/ tables. To accurately match the ResourceBundle
concept, I created a Resource Bundle table and a child Resource Message table
(see
Nifty. I might end up using something like that. Thanks.
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How would a subclass of org.jboss.seam.core.ResourceBundle be annotated in this
case - are the annotations below correct?
Also, would some extra configuration in components.xml be required too?
ExtendedResourceBundle.java
| ...
| @Scope(ScopeType.SESSION)
| @Intercept(NEVER)
|
Not quite
ExtendedResourceBundle.java
| ...
| @Name(org.jboss.seam.core.resourceBundle)
| public class ExtendedResourceBundle extends
org.jboss.seam.core.ResourceBundle
| ...
| @Override
| protected ResourceBundle loadBundle(String bundleName) {
| try {
|
But beware, if you are using core:resourceBundle in components.xml, you'll need
to change it to point at your overridden resource bundle
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I find that my users want to frequently change messages and text throughout my
applications.
I would prefer to use an entity to store and update messages and text.
I believe that I would only need 3 fields: key, text, locale
or possibly key, text, en, fr (an extra column of each locale)
My
Easy. Extend the built-in ResourceBundle component, and override some methods.
We are targetting JDK5, not JDK6.
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