Conversations - do not work in Seam 1.2.1?
I'm working on some code where I am trying to do the following:
1. User clicks a link to an action method on a SFSB
2. method is annotated with @Begin, using a custom conversation id
2a. the custom conversation id comes from the following
2a-1. a @Factory method in a SLSB creates a new persistent entity; the id of this entity will be appended to a String to create a custom conversation id
2a-2. the @Factory class would like to use the existing persistent entity if possible (avoid creating new persistent or querying for existing persistent entity) - thus, I have an @In for the entity.
2a-3. here is the class with the @Factory method:
@Stateless
@Name("draftAccessRequestFinder")
public class DraftAccessRequestFinderBean implements DraftAccessRequestFinder {
@Logger
private Log log;
@PersistenceContext(unitName = "accessControlDatabase")
private EntityManager em;
@In
private Principal userPrincipal;
@In("#{conversation.id}")
private String conversationId;
@In(required = false) @Out(scope= ScopeType.CONVERSATION)
private DraftAccessRequestMaster draftAccessRequestMaster;
@Factory("draftAccessRequestMaster")
public DraftAccessRequestMaster createMaster() {
log.info("DraftAccessRequestFinderBean.createMaster() : conversationId -> "+conversationId);
log.info("DraftAccessRequestFinderBean.createMaster() : draftAccessRequestMaster -> "+draftAccessRequestMaster);
// create or load draftAccessRequest....
if (conversationId != null && conversationId.indexOf(':')>0 && draftAccessRequestMaster == null) {
long id = Long.valueOf(conversationId.substring(conversationId.indexOf(':')+1));
draftAccessRequestMaster = em.find(
DraftAccessRequestMaster.class, id
);
log.info("loaded draftAccessRequestMaster -> "+draftAccessRequestMaster);
}
if (draftAccessRequestMaster == null) {
if (userPrincipal == null) {
throw new RuntimeException("userPrincipal is null.");
}
if (!(userPrincipal instanceof UserPrincipal)) {
throw new RuntimeException("userPrincipal is not an instance of com.evergreen.jaas.UserPrincipal.");
}
draftAccessRequestMaster = new DraftAccessRequestMaster();
draftAccessRequestMaster.setUserId(
((UserPrincipal) userPrincipal).getUserid()
);
draftAccessRequestMaster.setUserName(
((UserPrincipal) userPrincipal).getPersonName()
);
em.persist(draftAccessRequestMaster);
em.flush(); // we need to obtain a PK for this entity now...
}
return draftAccessRequestMaster;
}
}
3. here is the SFSB that wants the custom conversation id as well as a reference to the persistent entity:
@Stateful
// Seam - defaults to Conversational context...
@Name("accessRequestManager2")
public class AccessRequestManager2Bean implements AccessRequestManager2 {
@Logger
private Log log;
@PersistenceContext(unitName = "accessControlDatabase")
private EntityManager em;
@In
private UserPrincipal userPrincipal;
// for development purposes only - todo remove this
@In
private Conversation conversation;
@In(create=true) @Out(scope= ScopeType.CONVERSATION)
private DraftAccessRequestMaster draftAccessRequestMaster;
@Out
private List<String> errors = new ArrayList<String>();
/**
* Start a new add-access request. This method also generates the conversationId to
* use in the conversation that beans of this class are associated with.
*
* This is complicated - in 1 swoop, we need to
* 1 - create the DraftAccessRequestMaster for the conversation component
* 2 -
*/
@Begin(id = "DraftAccessRequestID:#{draftAccessRequestMaster.id}", join = true)
public void startAddRequest() {
log.info("startAddRequest()");
log.info(conversation);
log.info("conversation.id = " + conversation.getId());
log.info("conversation.parentId = " + conversation.getParentId());
if (draftAccessRequestMaster == null) {
log.info("draftAccessRequestMaster is null...not expected.");
}
....
}
}
4. here is a link that calls the SFSB method:
<s:link action="#{accessRequestManager2.startAddRequest}" value="Add 2"
title="Add entitlements to an application for a user.">
</s:link>
5. and here is a log of what occurs
First click of link...
10:53:32,805 INFO com.evergreen.accesscontrol.impl.DraftAccessRequestFinderBean - DraftAccessRequestFinderBean.createMaster() : conversationId -> 3
10:53:32,805 INFO com.evergreen.accesscontrol.impl.DraftAccessRequestFinderBean - DraftAccessRequestFinderBean.createMaster() : draftAccessRequestMaster -> null
10:53:32,805 INFO com.evergreen.accesscontrol.entity.DraftAccessRequestMaster - new DraftAccessRequestMaster()
10:53:32,821 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - startAddRequest()
10:53:32,821 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - org.jboss.seam.core.Conversation@54d3dd
10:53:32,821 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - conversation.id = DraftAccessRequestID:50
10:53:32,821 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - conversation.parentId = null
Second click of link (expecting to find draftAccessRequestMaster in memory for conversation but it's not found...)
10:53:36,915 INFO com.evergreen.accesscontrol.impl.DraftAccessRequestFinderBean - DraftAccessRequestFinderBean.createMaster() : conversationId -> DraftAccessRequestID:50
10:53:36,915 INFO com.evergreen.accesscontrol.impl.DraftAccessRequestFinderBean - DraftAccessRequestFinderBean.createMaster() : draftAccessRequestMaster -> null
10:53:36,930 INFO com.evergreen.accesscontrol.entity.DraftAccessRequestMaster - new DraftAccessRequestMaster()
10:53:36,930 INFO com.evergreen.accesscontrol.impl.DraftAccessRequestFinderBean - loaded draftAccessRequestMaster -> DraftAccessRequestMaster{...}
10:53:36,930 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - startAddRequest()
10:53:36,930 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - org.jboss.seam.core.Conversation@adf2c7
10:53:36,946 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - conversation.id = DraftAccessRequestID:50
10:53:36,946 INFO com.evergreen.accesscontrol.impl.AccessRequestManager2Bean - conversation.parentId = null
So note that I @Out(ject) the entity to Conversation scope, however, when the link is clicked the second time the SLSB and the SFSB don't have an instance of draftAccessRequestMaster injected. So why can't I find my conversational-scoped entity? It looks like the conversation is correctly @Begin(ning) or joining based on whether or not the conversation exists.
Thanks,
Brad Smith
