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Struts & Hibernate
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| | | - Conversations - do not work in Seam 1.2.1? | - Conversations - do not work in Seam 1.2.1? 2007-06-13 - By bsmithjj
Back
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 @(protected), using a custom conversation id
2a. the custom conversation id comes from the following
2a-1. a @(protected) 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 @(protected) 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 @(protected) for the entity.
2a-3. here is the class with the @(protected) method:
| @(protected)
| @(protected)("draftAccessRequestFinder")
| public class DraftAccessRequestFinderBean implements
DraftAccessRequestFinder {
|
| @(protected)
| private Log log;
|
| @(protected)(unitName = "accessControlDatabase")
| private EntityManager em;
|
| @(protected)
| private Principal userPrincipal;
|
| @(protected)("#{conversation.id}")
| private String conversationId;
|
| @(protected)(required = false) @(protected)(scope= ScopeType.CONVERSATION)
| private DraftAccessRequestMaster draftAccessRequestMaster;
|
| @(protected)("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:
| @(protected)
| // Seam - defaults to Conversational context...
| @(protected)("accessRequestManager2")
| public class AccessRequestManager2Bean implements AccessRequestManager2 {
|
| @(protected)
| private Log log;
|
| @(protected)(unitName = "accessControlDatabase")
| private EntityManager em;
|
| @(protected)
| private UserPrincipal userPrincipal;
|
| // for development purposes only - todo remove this
| @(protected)
| private Conversation conversation;
|
| @(protected)(create=true) @(protected)(scope= ScopeType.CONVERSATION)
| private DraftAccessRequestMaster draftAccessRequestMaster;
|
| @(protected)
| 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 -
| */
| @(protected)(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@(protected)
| 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@(protected)
| 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 @(protected)(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 @(protected)(ning) or
joining based on whether or not the conversation exists.
Thanks,
Brad Smith
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&p=4054036#4054036
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