I have a java ee 6 project bundled as ear-file that contains two web war-archive. Both using Omnifaces. Today I upgrade Omnifaces to the newest version 1.6. But now I cannot deploy anymore. I got the following exception:
java.lang.IllegalArgumentException: Registering validator 'class org.omnifaces.validator.RequiredCheckboxValidator' failed, duplicates validator ID 'omnifaces.RequiredCheckboxValidator' of other validator 'class org.omnifaces.validator.RequiredCheckboxValidator'.
at org.omnifaces.cdi.validator.ValidatorExtension.processValidators(ValidatorExtension.java:73)
...
My Envroiment:
JBoss AS 7.1.1/ Omnifaces 1.6/ JSF Mojarra 2.1.26/ Primefaces 3.5
THX in advance.
This bug has been fixed in 1.6.1. There's quite a story behind this bug, so I just wrote a blog on that: CDI behaved unexpectedly in EAR, so OmniFaces 1.6.1 released!
Summarized: CDI context isn't WAR-wide, but EAR-wide. As to the particular exception you faced, it's because there was only one CDI ValidatorExtension being loaded from one WAR which is then applied EAR-wide and thus processing all #FacesValidator classes from both WARs instead of the WAR where the CDI extension was being loaded from.
Note that this is not a problem in OmniFaces. This is a problem in the way how CDI works in EARs.
Related
I'm planning to convert a web app from using JSF managed bean to using CDI managed beans. I know I'll need to do below:
Add a empty beans.xml file in WEB-INF.
Replace all JSF #ManagedBean to CDI #Named annotations.
Replace all JSF scope annotations with CDI or OmniFaces scope annotations.
Replace all JSF #ManagedProperty with CDI #Inject annotations.
Is that all that needs to be done? Are there any gotchas that I need to be aware of?
Basically, that's indeed all you need to do provided that you're on a Java EE server already. When on Tomcat, you'd need to manually install CDI first. Instructions for both Weld and OpenWebBeans are detailed in the blog How to install CDI in Tomcat?
The below gotchas need to be taken care of:
While OmniFaces 2.x "officially" requires JSF 2.2, OmniFaces 2.0/2.1 is technically backwards compatible with JSF 2.1 and should in TomEE's case work on TomEE 1.x with JSF 2.1 as well, but OmniFaces 2.2 has a hard JSF 2.2 dependency (due to the new <o:viewAction> tag) and won't deploy on TomEE 1.x without upgrading its MyFaces JSF implementation to a 2.2 compatible version, or itself being upgraded to TomEE 7.x. See also OmniFaces Compatibility Matrix.
When you deploy an EAR with multiple WARs with each its own OmniFaces library, then generally all CDI functionality will work in only one WAR as the CDI context of a WAR-provided library is incorrectly interpreted as EAR-wide. This is an oversight in CDI spec and yet to be fixed in a future CDI version. See also OmniFaces Known Issues (CDI).
When you want to use OmniFaces-provided CDI injection support in #FacesConverter or #FacesValidator, and you're going to create/use a CDI 1.1 compatible beans.xml (and thus not a CDI 1.0 compatible one or an empty one), then you need to make sure that you have explicitly set bean-discovery-mode="all" in beans.xml. See also #FacesConverter showcase.
When replacing #ManagedBean(eager=true), be aware that standard CDI has no direct equivalent for this. You would use #Observes for this. OmniFaces offers #Eager annotation for the purpose. See also How to configure a start up managed bean?
When replacing #ManagedProperty in JSF 2.0/2.1/2.2, be aware that you can't inject #{param.xxx}, #{cookie.xxx} and #{initParam.xxx} directly via #Inject alone, while that was just possible via #ManagedProperty. OmniFaces offers respectively #Param, #Cookie and #ContextParam for the purpose. Only in JSF 2.3 there's a new #javax.faces.annotation.ManagedProperty annotation which can be used exactly the same way as original #javax.faces.bean.ManagedProperty which got deprecated since JSF 2.3.
It seems like this questions should be easy but the installation requirements for Grails (http://www.grails.org/Installation) haven't been updated in 2 years. Does anyone know for sure is Grails 2.3 will run on JDK 8?
As noticed by heikkim this ticket which is now closed suggests that support for Java 8 will start on Grails 2.4:
http://jira.grails.org/browse/GRAILS-11063 (title: Java 8 support)
Tried an app (built on v2.3.7) on JDK 8 and hit a road block with database-migration plugin while compiling the app. If that particular plugin is commented out then everything looks good during compilation.
Running the app (with a sample controller) throws an error related to withFormat method from grails-plugin-mimetypes. Looking into it.
Raised an improvement defect for grails-database-migration plugin. I think this may not be required as well but making grails JDK8 compatible might need changes in grails-core. However, I have not checked with latest milestone build for Grails 2.4 which might already be taking care of those compatibility issues.
I have a JSF 2.0 application. Can we use acegi-jsf of version 1.1.3. Can we use this tag library for JSF 2.0.
Acegi does not exist anymore. It was taken over by Spring in April 2008 and continued under the brand "Spring Security". That Acegi tag library is likely JSP targeted and not Facelets targeted. JSF 2.0 was namely introduced in December 2009, which is a long time after the Acegi takeover by Spring.
You should be looking for Spring Security JSF 2.0 tag library instead. However, a "JSF 2.0 tag library" can better be rephrased to "Facelets tag library" in order to end up with a more correct term and thus get better Google hits. You ultimately want to use this on Facelets (XHTML) files, right?
I don't do Spring, but Googling on "Spring Security Facelets tag library" yields among others this link which describes how to manually declare Facelets tag libraries and EL functions. There does thus not seem to be a full integration (i.e. just dropping JAR in webapp without the need to manually create .taglib.xml files), they seem to be working on that for future releases.
We would like to create a completely new service using JBoss 7.1 with modern technologies
such as JPA, Java EE 6, etc....
Alas, we have a legacy system running on a JBoss 4.2.2 that is definitely NOT portable to JBoss 7. The old system will have to access the new system, i.e. call methods via RMI.
Unfortunately, that is not possible out of the box:
JBoss 7 does not support the old JNP protocol anymore that was usually used in JBoss 4 for JNDI lookups.
(See https://docs.jboss.org/author/display/AS71/JNDI+Reference)
We cannot just add the new JARs needed for the new protocol to, say, default/lib, because this will cause version conflicts (logging, e.g.) and simply does not work.
I see two possible solutions, which are both complicated and error-prone:
We add a new Deployment to JBoss 4 that is packaged with all
necessary libraries to access JBoss 7 using and try to use JBoss'
class loader magic in jboss-app.xml to make it work.
We retrofit the old JNP server which can be found in jnpserver.jar
as a new JBoss 7 module.
In both cases we would have to bind a Bridge/Adapter object to the JNDI context via JNP that forwards all requests.
Does anyone have experiences in bridging the gap (rather a snake pit in fact) between JBoss 4 to JBoss 7 or a better idea?
Thanks in advance.
Markus
Make your life easier and use web services between them as this will also avoid and classloader / serialization hell
I'm migrating a JSF 1.2 project, running in WAS7, to JSF2 with Myfaces 2.1.7 and Primefaces.
Until now, everything was more or less working, putting myfaces-bundle-2.1.7.jar and primefaces 3.3.RC1.jar in the WEB-INF/lib and changing to classloading order.
Now, I'm trying to get EL2.2 working :
Are the corresponding classes part of the Myfaces Impl classes (in myfaces-bundle-2.1.7.jar, but with which specific configuration ?), or did I miss some specific library to add to the /WEB-INF/lib ?
Thanks for reading me ;)
EL 2.2 is not part of JSF 2.0. It's part of Servlet 3.0 which in turn is part of Java EE 6. But WebSphere 7 is a Java EE 5 container, not a Java EE 6 one. JSF 2.0 is part of Java EE 6 but backwards compatible with Servlet 2.5 / Java EE 5, that's probably where your confusion is coming from.
As said, WebSphere 7 is a Servlet 2.5 container and thus doesn't ship with EL 2.2, but with EL 2.1. Your best bet is to install an EL 2.1 implementation which supports the same enhancements (invoking methods with arguments) as in EL 2.2. There's only one: JBoss EL. To install it, just drop jboss-el.jar in webapp's /WEB-INF/lib and add the following context parameter to your web.xml to tell MyFaces to use it instead.
<context-param>
<param-name>org.apache.myfaces.EXPRESSION_FACTORY</param-name>
<param-value>org.jboss.el.ExpressionFactoryImpl</param-value>
</context-param>