[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Works great ! Thanks for the reference to the example ! supernovasoftware.com wrote : Have a look at my post on a different matter. | | http://www.jboss.com/index.html?module=bbop=viewtopict=85986 | | I was using an inner class like in the DVD Store example and passing the entitymanager to the constructor. | | I used @PersistenceContext to inject the EntityManager into the SLSB. View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3955068#3955068 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3955068 Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Hello,
Got same problem, tried same approach,
but I still get a null instance of EntityManager after adding getInstance to
the getAsObject method in the custom converter:
Component.getInstance(em, true);
Questions:
1. Is it that I need to declare the Seam Managed bean em somewhere else for
this to be referenced ?
2. Do I need to declare this class as SLSB to be able to use the EntityManager
instance?
This is the custom converter class : (same as original posting)
|
| @Name(MyCustomConverter)
| @Scope(ScopeType.EVENT)
| @Intercept(InterceptionType.ALWAYS)
| public class MyCustomConverted implements Converter
| @In(create=true)
| EntityManager em;
|
|
Could you please provide any directions, hints or ideas ?
Thanks !
js8523 wrote : Hi
|
| Worked like a treat.
|
|
| | /**
| | * Fetches the contract object direct from the database each
time it is selected
| | */
| | public Object getAsObject (FacesContext context, UIComponent
component, String value){
| | log.debug(getAsObject: Called with value = + value);
| |
| | // Fetch the entity manager from the one managed in
seam.
| | EntityManager em =
(EntityManager)Component.getInstance(em, true);
| | return (Object)(Contract)em.find(Contract.class,
Long.valueOf(value).longValue());
| | }
| |
|
| Thanks for the help.
|
| Thinking about the reverse engineering tool, it would be possible to
automatically generate the different converters as long as each entity had a
@Id and a field that could be used as the name element (the tricky part).
|
| As far as extending seam with further annotations, I will have to think
about this further (i.e. how the converter could be generalised further, to
lookup any type of entity, rather than converter per entity type). Allow
possibly the converters could be created and cached at seam scanner time for
each entity component that had @Selectable annotation?, this scanner task would
also need to dynamically register the converters with jsf/myfaces which I
believe is possible using the myfaces Application class (don't know about the
RI implementation).
|
| The entity class annotated with @Selectable would have to have an @Id
attribute and a attribute annotated with something like @SelectionName for the
displayed name of the object in the selectItems. I don't know if it possible
to pass in the function that you want to use dynamically to a function, but if
it is then its a possibility?
|
| Just thoughts currently.
|
| James
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Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642
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[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Have a look at my post on a different matter. http://www.jboss.com/index.html?module=bbop=viewtopict=85986 I was using an inner class like in the DVD Store example and passing the entitymanager to the constructor. I used @PersistenceContext to inject the EntityManager into the SLSB. View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3954906#3954906 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3954906 Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnkkid=120709bid=263057dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Thanks for help! Figured out a solution thats perfect for my app, you can find the Code here: http://www.jboss.org/index.html?module=bbop=viewtopicp=3925444#3925444 Dennis View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3925447#3925447 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3925447 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Just a Question relatetd to using a Seam component as converter: If I'm doin so, do I also have to put the following part to my config? Greetings Dennis converter | converter-idStateConverter/converter-id | converter-class | org.termtimer.controller.StateConverter | /converter-class | /converter View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3924679#3924679 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3924679 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
You can use your converter like this:
h:selectOneMenu id=s value=#{usuarioSesion.sexo}
| converter=#{enumTypeConverter}
| f:selectItems value=#{items.itemsSexo} /
| /h:selectOneMenu
Where enumTypeConverter is the seam component name.
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[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Hi All added note with performing conversion in this manner. Myfaces uses the equals comparator of the converted object to validate that it is the same as the original field value, as the converted value is a new object fetched from the database, this allways fails, and produces a validation error. So make sure that any object you use in this manner has a user defined equals comparator. Thanks, James View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3919687#3919687 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3919687 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Hi
Worked like a treat.
| /**
| * Fetches the contract object direct from the database each time it is
selected
| */
| public Object getAsObject (FacesContext context, UIComponent component,
String value){
| log.debug(getAsObject: Called with value = + value);
|
| // Fetch the entity manager from the one managed in seam.
| EntityManager em = (EntityManager)Component.getInstance(em,
true);
| return (Object)(Contract)em.find(Contract.class,
Long.valueOf(value).longValue());
| }
|
Thanks for the help.
Thinking about the reverse engineering tool, it would be possible to
automatically generate the different converters as long as each entity had a
@Id and a field that could be used as the name element (the tricky part).
As far as extending seam with further annotations, I will have to think about
this further (i.e. how the converter could be generalised further, to lookup
any type of entity, rather than converter per entity type). Allow possibly the
converters could be created and cached at seam scanner time for each entity
component that had @Selectable annotation?, this scanner task would also need
to dynamically register the converters with jsf/myfaces which I believe is
possible using the myfaces Application class (don't know about the RI
implementation).
The entity class annotated with @Selectable would have to have an @Id attribute
and a attribute annotated with something like @SelectionName for the displayed
name of the object in the selectItems. I don't know if it possible to pass in
the function that you want to use dynamically to a function, but if it is then
its a possibility?
Just thoughts currently.
James
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[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
After further reading, the problem probably lies in the method that jsf uses to create/lookup the Converter class. With variables Seam is able to plug-in a SeamVariableResolver which allows Seam to intercept the call to Seam components and do the appropriate actions. However on a converter object, myfaces/jsf has an internal hashmap of converters that it looks up in via the converterid (which it creates at deployement time). This means Seam does not have an opportunity to manage the instantiation of the Converter object, and therefore @In(create=true) EntityManager em; does not work. Therefore the only way of fetching seam components or the persistence context would be to use a manual referencing technique, byassing the seam framework. This should not be a problem architecturaly if it is pratical. If anyone has anything to correct/clarify please chip in. Thanks, James View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3918957#3918957 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3918957 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
So what happens if you do: Component.getInstance(em, true); View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3918969#3918969 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3918969 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Hi Gavin Unfortuneatly I know the EntityManager em (Factory) exists as I can see it being deployed, and it is used in many other places in my application. I thought the problem could be in one of two areas: 1. I have an ejb3 and a war packaged inside an ear. Obviously the converter is being called from within the war, is it possible to instantiate a seam component in the war file. I know that I had classpath issues (with converters) (to resolve this I created a ejbclient.jar which is imported into the war). I imagine it could be using the class file from the jar rather than the ejb3? I am also using RepositoryLocatorURL = local for my deployments. 2. Could it be that seam components are not injected by the time it gets the conversion phase in the jsf lifecycle? Now I have written it down, I imagine it is more likely to be 1. How have other people got round seam component type jsf converters and classpath issues between ejb3 and war deployements. Many thanks, James View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3918827#3918827 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3918827 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
Which JSF phase are converters called in? Apply request values, right? So it should not be a problem. AFTER_RESTORE_VIEW is the default Seam interception type, and conversational components are available from the end of the restore view phase. View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3918863#3918863 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3918863 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [JBoss Seam] - Re: Seam component as converter with EntityManager/Persisten
That code looks ok to me. Should work. You do need to have a seam-managed persistence context named em, however. Probably you have not got that configured, or it has a different name View the original post : http://www.jboss.com/index.html?module=bbop=viewtopicp=3918480#3918480 Reply to the post : http://www.jboss.com/index.html?module=bbop=postingmode=replyp=3918480 --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnkkid=103432bid=230486dat=121642 ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
