2:20 p.m.
[ http://jira.jboss.com/jira/browse/JBSEAM-1770?page=comments#action_12401051 ]
Pete Muir commented on JBSEAM-1770:
-----------------------------------
Can you provide an attached app which shows this? It needs to have an ant script which we
can use to build and deploy to JBoss AS with HSQL as the database.
Infinite loop when in some pages.xml configuration
--------------------------------------------------
Key: JBSEAM-1770
URL: http://jira.jboss.com/jira/browse/JBSEAM-1770
Project: JBoss Seam
Issue Type: Bug
Components: Core
Affects Versions: 2.0.0.BETA1
Environment: windows XP, RHEL 5.0
Reporter: Richard Leherpeur
Assigned To: Pete Muir
You can download this example on the Seam web site: navigation.zip
I have the following classes:
Code:
@Name("user")
@Scope(ScopeType.CONVERSATION)
public class User implements Serializable {
private String pet;
public String getPet() {
return pet;
}
public void setPet(String pet) {
this.pet = pet;
}
}
Code:
@Name("navigation")
@Scope(ScopeType.CONVERSATION)
public class Navigation implements Serializable {
@In(required=true)
User user;
@Logger
private Log log;
public String animalOutcome(){
if (user == null){
return "Dog"; // Just to make sure we don't return null
}
log.info("********* Outcome: " + user.getPet());
return user.getPet();
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
Code:
@Name("animals")
public class AnimalList
{
private List<String> animals;
@Unwrap
public List<String> unwrap()
{
if (animals == null)
{
animals = new ArrayList<String>();
animals.add("Dog");
animals.add("Cat");
animals.add("Goldfish");
animals.add("Rabbit");
animals.add("Snake");
animals.add("Parrot");
}
return animals;
}
}
Pages.xhtml is defined as followed:
Code:
<pages xmlns="http://jboss.com/products/seam/pages"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jboss.com/products/seam/pages
http://jboss.com/products/seam/pages-2.0.xsd">
<page view-id="/pageOne.xhtml">
<begin-conversation join="true" pageflow="navigation" />
</page>
<page view-id="/animalPage.xhtml"
action="#{navigation.animalOutcome}">
<navigation>
<rule if-outcome="Dog">
<redirect view-id="/animal/dog.xhtml"/>
</rule>
<rule if-outcome="Cat">
<redirect view-id="/animal/cat.xhtml"/>
</rule>
<rule if-outcome="Goldfish">
<redirect view-id="/animal/goldfish.xhtml"/>
</rule>
<rule if-outcome="Rabbit">
<redirect view-id="/animal/rabbit.xhtml"/>
</rule>
<rule if-outcome="Snake">
<redirect view-id="/animal/snake.xhtml"/>
</rule>
<rule if-outcome="Parrot">
<redirect view-id="/animal/parrot.xhtml"/>
</rule>
</navigation>
</page>
</pages>
The pageflow is defined as:
Code:
<pageflow-definition
xmlns="http://jboss.com/products/seam/pageflow"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jboss.com/products/seam/pageflow
http://jboss.com/products/seam/pageflow-2.0.xsd"
name="navigation">
<start-page name="displayChoice" view-id="/pageOne.xhtml">
<redirect/>
<transition name="next" to="animalPage" />
</start-page>
<page name="animalPage" view-id="/animalPage.xhtml">
<end-conversation/>
<redirect/>
</page>
</pageflow-definition>
And finally the pageOne.xhtml:
Code:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:c="http://java.sun.com/jstl/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:s="http://jboss.com/products/seam/taglib">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8" />
<title>Test Navigation</title>
</head>
<body>
<div id="container">
<h3>Choose an animal</h3>
<h:form>
<h:selectOneMenu value="#{user.pet}">
<s:selectItems value="#{animals}" var="animal"
label="#{animal}" noSelectionLabel="Select your pet"/>
</h:selectOneMenu>
<h:commandButton value="Go To Pet Page" action="next" />
</h:form>
</div>
</body>
</html>
When I select an animal, I get the following stacktrace:
Code:
INFO: Added Library from: jar:file:/C:/Jboss/jboss-4.2.0.GA/server/default/tmp/d
eploy/tmp50163navigation.ear-contents/navigation-exp.war/WEB-INF/lib/jsf-facelet
s.jar!/META-INF/jstl-core.taglib.xml
13:23:07,046 INFO [Navigation] ********* Outcome: Cat
13:23:07,218 INFO [Navigation] ********* Outcome: Cat
13:23:07,281 INFO [Navigation] ********* Outcome: Cat
13:23:07,359 INFO [Navigation] ********* Outcome: Cat
13:23:07,437 INFO [Navigation] ********* Outcome: Cat
13:23:07,515 INFO [Navigation] ********* Outcome: Cat
13:23:07,609 INFO [Navigation] ********* Outcome: Cat
13:23:07,687 INFO [Navigation] ********* Outcome: Cat
13:23:07,781 INFO [Navigation] ********* Outcome: Cat
13:23:07,859 INFO [Navigation] ********* Outcome: Cat
1:
Code:
<page view-id="/animalPage.xhtml">
<navigation evaluate="#{navigation.outcome}">
...
where #{navigation.outcome} returns outcome
-> redirection to /animalPage.xhtml (which doesn't exist) because evaluate EL
expression is never called
2:
Code:
<page view-id="/animalPage.xhtml"
action="#{navigation.animalOutcome}">
<navigation evaluate="#{navigation.outcome}">
...
where #{navigation.animalOutcome} returns void and #{navigation.outcome} returns outcome
-> We enter a loop where action expression is called then evaluate expression is
called, etc....
3:
Code:
<page view-id="/animalPage.xhtml"
action="#{navigation.animalOutcome}">
<navigation from-action="#{navigation.animalOutcome}">
...
where #{navigation.animalOutcome} returns outcome
-> We enter a loop where action expression is called indefinitely
4:
Code:
<page view-id="/animalPage.xhtml"
action="#{navigation.animalOutcome}">
<navigation>
...
where #{navigation.animalOutcome} returns outcome
-> We enter a loop where action expression is called indefinitely
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