7:38 p.m.
Hello
I'm having problems with a nested conversation, which after termination cannot restore
the parent conversation only in 1 out of 3 similar (it seems so) cases.
Its a case of edition of item A which has a collection of items B, when edition of item A
starts I begin a conversation,
inside that page every edition of items B is done inside a nested conversation.
It works fine except in case of deletion of item B, which throws IllegalStateException:
missing conversation entry.
Here is the relevant code
this is the extract from master page (company which holds a collection of employees):
<!-- page for edition of Company -->
| <s:link value="Add employee" action="#{editorEmployee.create}"
rendered="#{editorCompany.company.id!=null}"/>
|
| <rich:dataTable value="#{editorCompany.company.employees}"
var="emp" rows="5"
rendered="#{editorCompany.company.employees.size>0}">
| <h:column>
| <h:outputText value="#{emp.name}" />
| <br/>
| <s:link value="Edit"
action="#{editorEmployee.select(emp)}" />
| </h:column>
| </rich:dataTable>
|
this is the extract from detail page (employee data):
| <h:form id="f">
|
| <s:div rendered="#{editorEmployee.employee.id!=null}">
| <h:commandLink id="btnEliminar" value=""
action="#{editorEmployee.delete}"/>
| </s:div>
|
| <s:decorate id="nameDecorate"
template="/layout/edit.xhtml">
| <ui:define name="label">Name:</ui:define>
| <h:inputText id="name"
value="#{editorEmployee.employee.name}" required="true">
| <a4j:support event="onblur" reRender="nameDecorate"/>
| </h:inputText>
| </s:decorate>
|
| <div class="buttonBox">
| <h:commandLink action="#{editorEmployee.save}">
| <h:graphicImage value="/img/btn/btn_save.gif" alt="save"
styleClass="btn" />
| </h:commandLink>
|
| <h:commandLink action="#{editorEmployee.cancel}"
immediate="true">
| <h:graphicImage value="/img/btn/btn_cancel.gif" alt="cancel"
styleClass="btn" />
| </h:commandLink>
| </div>
| </h:form>
|
the pages.xml:
| <page view-id="/admin/editorEmployee.xhtml">
| <navigation from-action="#{editorEmployee.save}">
| <rule if="#{editorEmployee.ok}">
| <redirect view-id="/admin/editorCompany.xhtml"/>
| </rule>
| <rule if="#{not editorEmployee.ok}">
| <redirect view-id="/admin/editorEmployee.xhtml"/>
| </rule>
| </navigation>
| <navigation from-action="#{editorEmployee.cancel}">
| <redirect view-id="/admin/editorCompany.xhtml"/>
| </navigation>
| <navigation from-action="#{editorEmployee.delete}">
| <redirect view-id="/admin/editorCompany.xhtml"/>
| </navigation>
| </page>
|
finally, the EditorEmployee.java
| @Scope(ScopeType.CONVERSATION)
| @Name("editorEmployee")
| @Restrict("#{identity.loggedIn and s:hasRole('Administrator')}")
| public class EditorEmployeeAction {
| @In("#{editorSede.sede}")
| Company company ;
|
| @Begin(nested=true, flushMode=FlushModeType.MANUAL)
| public void select(Employee selectedEmployee) {
| log.info("selectEmployee, beginning
conversation.id=#0",Conversation.instance().getId()) ;
| employee = entityManager.merge(selectedEmployee);
| }
|
| @Begin(nested=true, flushMode=FlushModeType.MANUAL)
| public void crear() {
| log.info("newEmployee, beginning
conversation.id=#0",Conversation.instance().getId()) ;
| employee = new Employee(company, "") ;
| }
|
| @End
| public void delete() {
| company.getEmployees().remove(employee) ;
| entityManager.remove(employee) ;
| entityManager.flush() ;
| log.info("deleted employee #0, conversation.id:
#1",employee,Conversation.instance().getId()) ;
| facesMessages.add("Employee deleted successfully.") ;
| }
|
| public void save() {
| boolean valid = validateEmployee(employee) ;
| ok = false ;
| if(valid) {
| //agregate to collection only if new employee
| if(employee.getId()==null)
| company.getEmployees().add(employee) ;
|
| entityManager.persist(employee);
| facesMessages.add("Employee data saved ok");
| ok = true;
| entityManager.flush() ;
|
| log.info("finishing nested conversation
#0",Conversation.instance().getId());
| //conversation ended programmatically because in case validation fails the
page is redisplayed
| //and conversation must continue until canceled or data ok.
| Conversation.instance().end() ;
| }
| }
|
| @End
| public void cancel() {
| log.info("editing employee canceled.") ;
| }
|
Must part of this code works ok: creation or modification of employee, also if cancel
action invoked.
But something goes wrong with invocation of editorEmployee.delete(), the object is deleted
correctly
but the next view is not displayed, here is the complete stack trace:
| GRAVE: uncaught exception
| java.lang.IllegalStateException: missing conversation entry
| at org.jboss.seam.core.Conversation.flush(Conversation.java:124)
| at org.jboss.seam.core.Manager.flushConversationMetadata(Manager.java:882)
| at org.jboss.seam.faces.FacesManager.prepareBackswitch(FacesManager.java:278)
| at
org.jboss.seam.jsf.SeamPhaseListener.beforeRenderResponse(SeamPhaseListener.java:470)
| at
org.jboss.seam.jsf.SeamPhaseListener.beforeServletPhase(SeamPhaseListener.java:146)
| at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:116)
| at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:222)
| at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
| at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
| at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
| at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
| at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
| at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
| at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
| at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
| at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
| at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
| at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
| at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
| at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
| at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
| at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
| at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:834)
| at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:640)
| at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1286)
| at java.lang.Thread.run(Unknown Source)
|
I can not see what is the difference with delete action, respect the others, could someone
please give some advice on this?
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