@FlowScoped, @Named and @ManagedBean
Dear all,
I am starting to really use JSF 2.2. I am trying to use Faces Flows. I
am starting with a very simple flow, whose name is flow1.
So, under src/main/webapp, I have a flow1 directory containing
flow1-flow.xml
flow1.xhtml
flow1b.xhtml
flow1-flow.xml contains :
?xml version=1.0 encoding=UTF-8?
faces-config
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xmlns='http://xmlns.jcp.org/xml/ns/javaee'
xsi:schemaLocation='http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd'
version='2.2'
flow-definition id=flow1
flow-return id=returnFromFlow1
from-outcome/accueil/from-outcome
/flow-return
/flow-definition
/faces-config
With such a simple config, using conventions would be a better choice
than configuration, but I plan to add more things to it... :-)
I use a @FlowScoped bean declared this way :
@Named
@FlowScoped(flow1)
public class MinintFileContext implements Serializable {
}
and it does not work. I have the following exception :
javax.servlet.ServletException: javax.servlet.ServletException:
javax.el.ELException:
javax.enterprise.context.ContextNotActiveException: WebBeans context
with scope type annotation @FlowScoped does not exist within current thread
To make it work, I have to use @ManagedBean instead of @Named.
My first question is : I do not understand why... In my (obviously
wrong) understanding, @Named was a super-set of CDI-managed beans,
including @ManagedBean-s.
Another question...
I am using PrimeFaces p:menubar . I noticed that I can not use /flow1
as the outcome of a menuitem
Ex : p:menuitem value=Blah blah blah outcome=/flow1 /
I have to use
p:menuitem value=Blah blah blah outcome=/flow1/flow1 /
Why ? This might be a PF-specific question.
Finally, I am failing to use the flow-return configuration.
I tried
p:commandButton value=Terminer action=returnFromFlow1/
and
h:commandButton value=Terminer action=returnFromFlow1/
But it just does not work.
So, I tried to change the config to
flow-return id=returnFromFlow1
from-outcome#{minintFileContext.returnValue}/from-outcome
/flow-return
and added a
public String getReturnValue() {
return /accueil;
}
method to he MinintFileContext bean, but it does not work better.
Any idea ?
Thanks in advance
I have the following JSF-related or generic dependencies (I mean that I
remove in-house dependencies from the following tree) :
[INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @
faces-dependencies ---
[INFO] fr.senat:faces-dependencies:jar:4.0.0-SNAPSHOT
[INFO] +- commons-lang:commons-lang:jar:2.6:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.1:compile
[INFO] +- org.apache.tomcat:tomcat-catalina:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-servlet-api:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-juli:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-annotations-api:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-api:jar:7.0.47:provided
[INFO] | \- org.apache.tomcat:tomcat-util:jar:7.0.47:provided
[INFO] +- org.apache.myfaces.core:myfaces-api:jar:2.2.0:compile
[INFO] +- org.apache.myfaces.core:myfaces-impl:jar:2.2.0:compile
[INFO] | +- commons-collections:commons-collections:jar:3.2:compile
[INFO] | +- commons-codec:commons-codec:jar:1.3:compile
[INFO] | +- commons-beanutils:commons-beanutils:jar:1.8.3:compile
[INFO] | | \- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] | \- commons-digester:commons-digester:jar:1.8:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-jsf20-module-api:jar:1.0.5:compile
[INFO] | \-
org.apache.myfaces.extensions.cdi.core:myfaces-extcdi-core-api:jar:1.0.5:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-jsf20-module-impl:jar:1.0.5:runtime
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-jpa1-module-api:jar:1.0.5:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-jpa1-module-impl:jar:1.0.5:runtime
[INFO] | \-
org.apache.myfaces.extensions.cdi.core:myfaces-extcdi-core-impl:jar:1.0.5:runtime
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-bv1-module-api:jar:1.0.5:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-bv1-module-impl:jar:1.0.5:runtime
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-scripting-module-api:jar:1.0.5:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-scripting-module-impl:jar:1.0.5:runtime
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-message-module-api:jar:1.0.5:compile
[INFO] +-
org.apache.myfaces.extensions.cdi.modules:myfaces-extcdi-message-module-impl:jar:1.0.5:runtime
[INFO] +-
org.apache.geronimo.specs:geronimo-atinject_1.0_spec:jar:1.0:compile
[INFO] +-
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Re: @FlowScoped, @Named and @ManagedBean
Hi
2014-02-10 11:56 GMT-05:00 l.pe...@senat.fr l.pe...@senat.fr:
Dear all,
I am starting to really use JSF 2.2. I am trying to use Faces Flows. I am
starting with a very simple flow, whose name is flow1.
So, under src/main/webapp, I have a flow1 directory containing
flow1-flow.xml
flow1.xhtml
flow1b.xhtml
flow1-flow.xml contains :
?xml version=1.0 encoding=UTF-8?
faces-config
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xmlns='http://xmlns.jcp.org/xml/ns/javaee'
xsi:schemaLocation='http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd'
version='2.2'
flow-definition id=flow1
flow-return id=returnFromFlow1
from-outcome/accueil/from-outcome
/flow-return
/flow-definition
/faces-config
With such a simple config, using conventions would be a better choice than
configuration, but I plan to add more things to it... :-)
I use a @FlowScoped bean declared this way :
@Named
@FlowScoped(flow1)
public class MinintFileContext implements Serializable {
}
and it does not work. I have the following exception :
javax.servlet.ServletException: javax.servlet.ServletException:
javax.el.ELException: javax.enterprise.context.ContextNotActiveException:
WebBeans context with scope type annotation @FlowScoped does not exist
within current thread
To make it work, I have to use @ManagedBean instead of @Named.
My first question is : I do not understand why... In my (obviously wrong)
understanding, @Named was a super-set of CDI-managed beans, including
@ManagedBean-s.
@FlowScoped annotation is for CDI only, so it will not work for JSF
managed beans. In your case, I believe the bean is instantiated but it
is not stored in any context, so once is created is discarded, giving
the impression that the bean is working but it is not.
In MyFaces it is possible to create a custom flow scope annotation for
other containers that works just like @FlowScoped, implementing
org.apache.myfaces.spi.FacesFlowProvider SPI interface. You are
already in CDI, so you don't need to bother about that.
I have seen @Named annotation working with Spring, so it is not
something specific for CDI, but @FlowScoped depends of CDI API.
Another question...
I am using PrimeFaces p:menubar . I noticed that I can not use /flow1 as
the outcome of a menuitem
Ex : p:menuitem value=Blah blah blah outcome=/flow1 /
I have to use
p:menuitem value=Blah blah blah outcome=/flow1/flow1 /
Why ? This might be a PF-specific question.
Try in this way:
p:menuitem value=Blah blah blah outcome=flow1 /
If you put /flow1 as outcome, the navigation algorithm will
interpret this as a normal navigation to a page (/flow1.xhtml), so the
flow scope will not be activated and the bean will not be instantiated
correctly. It should work without any changes in primefaces, because
the outcome should be calculated using
ConfigurableNavigationHandler.getNavigationCase(...).
Finally, I am failing to use the flow-return configuration.
I tried
p:commandButton value=Terminer action=returnFromFlow1/
and
h:commandButton value=Terminer action=returnFromFlow1/
But it just does not work.
So, I tried to change the config to
flow-return id=returnFromFlow1
from-outcome#{minintFileContext.returnValue}/from-outcome
/flow-return
and added a
public String getReturnValue() {
return /accueil;
}
method to he MinintFileContext bean, but it does not work better.
Any idea ?
Try it again, maybe the reason is that it seems you are inside the
flow but it is not. You can check if you are in the flow using
facesContext.getApplication().getFlowHandler().isActive(...).
regards,
Leonardo Uribe
Thanks in advance
I have the following JSF-related or generic dependencies (I mean that I
remove in-house dependencies from the following tree) :
[INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @
faces-dependencies ---
[INFO] fr.senat:faces-dependencies:jar:4.0.0-SNAPSHOT
[INFO] +- commons-lang:commons-lang:jar:2.6:compile
[INFO] +- org.apache.commons:commons-lang3:jar:3.1:compile
[INFO] +- org.apache.tomcat:tomcat-catalina:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-servlet-api:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-juli:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-annotations-api:jar:7.0.47:provided
[INFO] | +- org.apache.tomcat:tomcat-api:jar:7.0.47:provided
[INFO] | \- org.apache.tomcat:tomcat-util:jar:7.0.47:provided
[INFO] +- org.apache.myfaces.core:myfaces-api:jar:2.2.0:compile
[INFO] +- org.apache.myfaces.core:myfaces-impl:jar:2.2.0:compile
[INFO] | +- commons-collections:commons-collections:jar:3.2:compile
[INFO] | +- commons-codec:commons-codec:jar:1.3:compile
[INFO] | +- commons-beanutils:commons-beanutils:jar:1.8.3:compile
[INFO] | | \-
