I just tried to add a composite JSF component into my weld project on glassfish 3.1.2.
This always fails with a null pointer exception.
I traced down the problem and found out, that it results from the following code within the class
com.sun.faces.application.ApplicationImpl.
#Override
public UIComponent [More ...] createComponent(FacesContext context, Resource componentResource) throws FacesException {
// RELEASE_PENDING (rlubke,driscoll) this method needs review.
Util.notNull("context", context);
Util.notNull("componentResource", componentResource);
UIComponent result = null;
// use the application defined in the FacesContext as we may be calling
// overriden methods
Application app = context.getApplication();
ViewDeclarationLanguage pdl = app.getViewHandler().getViewDeclarationLanguage(context, context.getViewRoot().getViewId());
BeanInfo componentMetadata = pdl.getComponentMetadata(context, componentResource);
....
The problem seems to be, that the ViewDeclarationLanguage pdl result to null and therefore the call for getComponentMetadata(...) result in the NPE.
The question is, why is this ViewDeclarationLanguage null? Is there anything special in this stack or do I have to configure any further properties?
Thank you very much for your help!
Thomas
I found the solution myself, but would like to share it, if someone else stumbles over the same problem.
Within the faces-config, there was a definition of a custom view-handler. This view-handler did not handle this request correctly, so I changed it to the "org.jboss.weld.jsf.ConversationAwareViewHandler".
Now it works!
Related
I tried to set up a simple JSF 2.2 application using MyFaces 2.2.8.
Since MyFaces has some context parameters that I never used before, I tried to get familiar with those.
So I got to use org.apache.myfaces.JSF_JS_MODE for the first time and ran into problems with h:commandLink.
The commandLink is trying to call myfaces.oam.submitForm() which is not defined if I set the mode to minimal-modern.
If I set the mode to minimal or normal it works.
From reading some internet articles I assume this is a bug because submitForm is neither part of jsf-legacy.js nor jsf-i18n.js nor jsf-experimental.js and it apparently is needed by h:commandLink.
Also the source code comment of org.apache.myfaces.shared.renderkit.html.util.ResourceUtils.markScriptAsRendered(FacesContext, String, String) tells me
oamSubmit script is included inside jsf.js
here:
public static void markScriptAsRendered(FacesContext facesContext, String libraryName, String resourceName)
{
getRenderedScriptResources(facesContext).put(
libraryName != null ? libraryName+'/'+resourceName : resourceName, Boolean.TRUE);
if (JAVAX_FACES_LIBRARY_NAME.equals(libraryName) &&
JSF_JS_RESOURCE_NAME.equals(resourceName))
{
// If we are calling this method, it is expected myfaces core is being used as runtime and note
// oamSubmit script is included inside jsf.js, so mark this one too.
getRenderedScriptResources(facesContext).put(
MYFACES_LIBRARY_NAME+'/'+MYFACES_JS_RESOURCE_NAME, Boolean.TRUE);
}
}
What am I missing here? Thanks in advance!
I can confirm it is a bug. Solved in MYFACES-4034 for 2.2.10
We are facing one issue in our Mule Adapter related to JAXB context, needed some opinion on the same
We are using xpath to evaluate some expressions in the choice blocks in our adapter like below for instance,
<choice doc:name="Choice">
<when expression="//env:abc/env:Body/ref:dataelement/ref:/ref:element" evaluator="xpath">
......
</when>
Now, this works perfectly fine in our application but the problem arises when one of other team uses this Adapter as a jar in their application.
When they try to use this adapter, they are getting below error,
Message : More than one object of type class javax.xml.bind.JAXBContext registered but only one expected.
Type : org.mule.api.registry.RegistrationException
Code : MULE_ERROR--2
JavaDoc : http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/api/registry /RegistrationException.html.
After debugging with the help of loggers etc, we narrowed down to the choice block used above which is causing this particular issue. Also, googled a bit and found one of the posts pointing out the same issue.
Also, to confirm we commented out the choice block having xpath expression and the flow went ahead but broke again where was xpath used in some other way.
https://www.mulesoft.org/jira/browse/MULE-5926
Can anyone please suggest any suitable workaround to resolve this issue?
I agree with you. It is an unresolved issue in Mule.
One solution we have implemented is not define the jaxb context in the config you are providing in the jar file.
Along with the jar file, give instructions to the end application using it, to include the JAXB packages in their JAXB Context object definition.
This way there will be only one JAXB context and it will work smoothly.
Hope this helps.
This is a bit late however the solution that worked was
<mulexml:jaxb-context name=“JAXB_Context“ packageNames=“org.example.test1:org.example.test2“ doc:name=“JAXB Context1“ />
Please note that there must be no space between package names.
Thanks to: http://dominikbial.de/quicktipp-working-with-more-than-one-package-name-in-a-jaxb-context-config-in-mule-esb/
As of now we cannot add more than one JAXBContext in mule. As an alternative you can write your custom transformer.
I implemented something like
public interface MyAppJaxbObj2XmlComponent<I,O> extends
MyAppComponent<I,O>,Callable {
public O marshal(I input) throws Exception;
}
Abstart transformer
public abstract class AbstractMyAppJaxbObj2XmlComponent<I,O> implements
MyAppJaxbObj2XmlComponent<I,O>{
private Class<I> inputType;
public AbstractMyAppJaxbObj2XmlComponent(){
this.inputType = (Class<I>) new TypeToken<I>(getClass())
{}.getRawType();
}
public AbstractMyAppJaxbObj2XmlComponent(Class<I> type){
this.inputType = type;
}
#Override
public Object onCall(MuleEventContext eventContext) throws Exception {
I input = eventContext.getMessage().getPayload(inputType);
O output = marshal(input);
return output;
}
}
Your flow transformer this will load your needed jaxb during startup.
#Component
public class MyFlowJaxbObj2XmlComponent extends
AbstractMyAppJaxbObj2XmlComponent<RequestPayloadType,String> {
#PostConstruct
public void init() {
//Load your schema during startup
}
}
You can also implement a fluid interface as an alternative for this.
I've a Groovy project where I use RESTEasy with Weld and deploy to embedded Jetty. What I can't seem to get working is bean validation. RESTEasy documentation says that adding resteasy-validator-provider-11 along with hibernate validator dependencies (hibernate-validator, hibernate-validator-cdi, javax.el-api, javax.el) is enough. But the bean validation is simply ignored by RESTEasy. I curiously also get the following message in the logs:
plugins.validation.ValidatorContextResolver - Unable to find CDI supporting ValidatorFactory. Using default ValidatorFactory
Based on the suggestions on [this][1] post, I tried registering Hibernate InjectingConstraintValidatorFactory in META-INF/validation.xml but it depends on a BeanManager being injected and blows up at runtime.
The code can be found here https://github.com/abhijitsarkar/groovy/tree/master/movie-manager/movie-manager-web
A log gist is here: https://gist.github.com/anonymous/8947319
I've tried everything under the sun without any success. Pls help.
To do this without EE, I believe you'll need to fork the existing InjectingConstraintValidatorFactory but instead of using injection of the bean manager, use the CDI 1.1 class CDI to get a reference to the bean manager, e.g. CDI.current().getBeanManager(). http://docs.jboss.org/cdi/api/1.1/javax/enterprise/inject/spi/CDI.html
You do need to be on CDI 1.1 to do this (so Weld 2+, 2.1.1 is current I believe). Here's an example impl, based on: https://github.com/hibernate/hibernate-validator/blob/master/cdi/src/main/java/org/hibernate/validator/internal/cdi/InjectingConstraintValidatorFactory.java
public class InjectingConstraintValidatorFactory implements ConstraintValidatorFactory {
// TODO look for something with better performance (HF)
private final Map<Object, DestructibleBeanInstance<?>> constraintValidatorMap =
Collections.synchronizedMap( new IdentityHashMap<Object, DestructibleBeanInstance<?>>() );
private final BeanManager beanManager;
public InjectingConstraintValidatorFactory() {
this.beanManager = CDI.current().getBeanManager();
Contracts.assertNotNull( this.beanManager, "The BeanManager cannot be null" );
}
#Override
public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) {
DestructibleBeanInstance<T> destructibleBeanInstance = new DestructibleBeanInstance<T>( beanManager, key );
constraintValidatorMap.put( destructibleBeanInstance.getInstance(), destructibleBeanInstance );
return destructibleBeanInstance.getInstance();
}
#Override
public void releaseInstance(ConstraintValidator<?, ?> instance) {
DestructibleBeanInstance<?> destructibleBeanInstance = constraintValidatorMap.remove( instance );
destructibleBeanInstance.destroy();
}
}
I finally fixed this. Turns out, a validation.xml is not really required, resteasy-cdi module does a fine job of registering the BeanManager. What I was missing and not clearly documented anywhere, is that if an annotation is placed on a method, the validation engine just "decides" what should be validated. I placed a #NotNull on a method and it was validating the return type, not the parameters. One can use validationAppliesTo element in some cases but #NotNull doesn't have it. When I moved it from the method to the parameter, it started working.
Now I ran across what I believe is a Weld bug but I'll post that question separately.
I want my session to timeout after a given interval of time. In web.xml I've been using code like:
<session-config>
<session-timeout>20</session-timeout>
</session-config>
where 20 is the timeout period in minutes, which works correctly.
What I would like to do is to do it programatically using code like this inside one of my beans as follow:
#ManagedBean(name="login")
#SessionScoped
public class MyLoginBean implements HttpSessionListener, Serializable {
// private variables etc.
HttpServletRequest request;
HttpSession session = request.getSession();
// Constructor
public MyLoginBean() {
session.setMaxInactiveInterval(1200);
}
// The rest of the code
}
where the timeout here is 1200 seconds, i.e. 20 minutes. Unfortunately, on opening up a browser to look at the application, it fails with the message:
com.sun.faces.mgbean.ManagedBeanCreationException: Cant instantiate class: com.csharp.MyLoginBean.
Followed by:
java.lang.NullPointerException
What am I doing wrong here? I know that setMaxInactiveInterval() refers to the particular session, which in this case is the login bean, rather than everything, which is what the code in web.xml file specifies. I have several beans, but timing out the login bean is the only one that matters.
I'm using JSF 2.0 with Glassfish 3.1.1 and Eclipse Indigo, so some advice would be very much appreciated.
The NullPointerException has an extremely simple cause. It's one of the most simplest exceptions. To learn about the cause of an arbitrary exception, just look in its javadoc. All Java exceptions have their causes explained in the javadoc. Here's an extract of the javadoc of NullPointerException:
Thrown when an application attempts to use null in a case where an object is required. These include:
Calling the instance method of a null object.
Accessing or modifying the field of a null object.
Taking the length of null as if it were an array.
Accessing or modifying the slots of null as if it were an array.
Throwing null as if it were a Throwable value.
Applications should throw instances of this class to indicate other illegal uses of the null object.
Your problem is caused by point 1. Here,
HttpServletRequest request;
HttpSession session = request.getSession();
you're trying to invoke getSession() method on null instead of a concrete HttpServletRequest instance. In fact, you should have obtained the HttpServletRequest via ExternalContext#getRequest() and assigned it to request.
However, you've bigger problems: you should absolutely not get hold of the current servlet request as a property of a session scoped bean (which lives longer than the HTTP request!). You should get it inside the thread local scope (i.e. wholly inside the constructor or the method block). You should also not let your JSF managed bean implement the HttpSessionListener. This makes no utter sense. You'd end up with 2 instances, one created as listener by the container and another one created as managed bean by JSF.
Just thus should do:
#ManagedBean(name="login")
#SessionScoped
public class MyLoginBean implements Serializable {
public MyLoginBean() {
HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext().getSession();
session.setMaxInactiveInterval(1200);
}
// ...
}
Or, if you're using JSF 2.1, use the one provided by ExternalContext:
FacesContext.getCurrentInstance().getExternalContext().setSessionMaxInactiveInterval(1200);
I have a JSF Validator that I'm building that has properties in it that I would like to have loaded from a ResourceBundle. However, I'm not quite sure how to work this, as it isn't loading properly. Any ideas on how I can make this work?
I've tried using a #PostContruct to do it, but I'm getting the following error in Eclipse:
Access restriction: The type
PostConstruct is not accessible due to
restriction on required library
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Classes/classes.jar
So, I'm not too sure what the best way to work this. A sample of what I'm talking about is below...
The validator...
#FacesValidator("usernameValidator")
public class UserNameValidator implements Validator {
#ManagedProperty(value="#{props_userNamePattern}")
private String userNamePattern;
#ManagedProperty(value="#{props_minUserNameLength}")
private int minUserNameLength;
#ManagedProperty(value="#{props_maxUserNameLength}")
private int maxUserNameLength;
public void validate(FacesContext context, UIComponent component, Object
value) throws ValidatorException {
//My validations here...
}
//Setters for the class properties
}
faces-config.xml
<resource-bundle>
<base-name>settings</base-name>
</resource-bundle>
settings.properties
props_userNamePattern = /^[a-z0-9_-]+$/
props_minUserNameLength = 3
props_maxUserNameLength = 30
The #ManagedProperty works on #ManagedBean classes only. The #PostConstruct will also not be the correct solution for your functional requirement. It is intented to be placed on a method which is to be executed when the class has been constructed and all dependency injections are been finished. The error which you're facing is caused by a specific combination of older Eclipse+JRE versions. If upgrading is not an option, you could disable the warning/error by Window > Preferences > Java > Compiler > Errors/Warnings > Deprecated and restricted API > Forbidden reference > Ignore.
As to your functional requirement, unfortunately no annotation which achieves that comes to mind. You could however get it programmatically.
String bundlename = "settings";
Locale locale = FacesContext.getCurrentInstance().getViewRoot().getLocale();
ResourceBundle bundle = ResourceBundle.getBundle(bundlename, locale);
String usernamePattern = bundle.getString("props_userNamePattern");
// ...
You can do that in the constructor of the validator. When used properly a new instance will be created for every view anyway.
Adding to the correct answer of BalusC; In JSF 2.0/2.1 Validators, Converters, PhaseListeners, etc are a kind of 'second-class' citizen as they are not injection targets.
This also means you can't inject an entity manager or an EJB, which can sometimes be used for validation purposes.
In JSF 2.2 this is supposed to change:
All JSF lifecycle artifacts should be
CDI-aware and support
injection/JSR-299/JSR-330
(PhaseListeners, NavHandlers,
Components, ActionListeners,
everything.)
See: http://jcp.org/en/jsr/detail?id=344
Perhaps seam-faces might help for this situation?
http://docs.jboss.org/seam/3/faces/latest/reference/en-US/html/artifacts.html
http://docs.jboss.org/seam/3/faces/latest/reference/en-US/html/faces.messages.html