2 Replies Latest reply on Sep 10, 2009 7:50 PM by nagendra_singh_krishnawat

Seam Conversation: Required Clarification.

nagendra_singh_krishnawat Sep 5, 2009 3:40 AM

My understanding of conversation is:
1. By default for every request there is a conversation which ends after the response, thats the reason why I see different conversationID for each JSF request.

2. If I write @Begin on the method and when that method is invoked the conversation is promoted to long running conversation (which means whatever components I am outjecting in seam context will remain in seam context until End is called), For entire long running conversation cid remains same.

3. "@End" will destroy the long running conversation and the default behavior(As per point 1, that is for each conversation new conversation id) is restored.

Taking this assumption I created a functionality which starts the conversation when the user make a search and ends the conversation when user updates the search results

I used @Begin(join=true) and @End(beforeRedirect=true) on search and update function respectively.

But after I leave the page the conversation is not ending and everytime I am visiting the portfolio page for any portfolio through a link its taking me to same portfolio. Seems like conversation has not actually ended and all the outjected variables are restored from conversation context.

Are my assumptions wrong, Am I doing anything fundamentally wrong.

1. Re: Seam Conversation: Required Clarification.

asookazian Sep 5, 2009 4:34 AM (in response to nagendra_singh_krishnawat)

In Seam apps, there is always either a temporary conversation or long-running conversation for each HTTP request/response cycle.

@Begin will promote a temporary conversation to LRC after method completion.

@End will demote the LRC to temporary conversation (for later destruction) after method completion.

You will need to show your code for more answers...
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2. Re: Seam Conversation: Required Clarification.

nagendra_singh_krishnawat Sep 10, 2009 7:50 PM (in response to nagendra_singh_krishnawat)

I could reply on very day, I was busy in other stuff, ok here is the code which kind of looks big but its very simple:

ok, Here is very simple logic of this page: This is an xhtml page containing bulk update functionality, it shows a scrollable table, user selects some rows and then user selects new values from select menu, then press 'save', thus new values get updated for selected rows:

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
                             "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:s="http://jboss.com/products/seam/taglib"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core"
                xmlns:h="http://java.sun.com/jsf/html"
                xmlns:a="http://richfaces.org/a4j"
                xmlns:rich="http://richfaces.org/rich"
                   template="#{theme.template}">
                       
<ui:define name="body">
          <style>
            .scrolls{
                width:300px;
                height:200px;
                overflow:auto;
            }
          </style> 
        
     <rich:panel headerClass="wamHeaderClass" header="Update Custodian Account Information">
      <f:facet name="header">Update Custodian Account Information</f:facet>

     <a:form>
          <h:panelGroup id="globalmessagepanel">
              <rich:messages globalOnly="true" styleClass="message" id="globalMessages"/>
         </h:panelGroup>
          <rich:toolTip followMouse="true" direction="top-right" showDelay="500" styleClass="tooltip" attached="true" id="toolTipForUpdateCustodianSteps" for="portfolioName" >
                <span  style="white-space:nowrap">
                    <h:panelGrid columns="2" width="55%">
                    <strong>1.</strong> <h:outputText value="Search a Custodian by Bank Name or CCA."/>
                    <strong>2.</strong> <h:outputText value="From search results, select a row by clicking on row; for multiple row selection press CTRL key, and then make selections."/>
                    <strong>3.</strong> <h:outputText value="Select the new value in the dropdown below and press 'Update' to update for selected rows for corrosponding values."/>
                    </h:panelGrid>
                </span>
            </rich:toolTip>
          <h:panelGrid columns="2" id="searchGrid" styleClass="gridStyle" border="0">
               <h:inputText id="portfolioName" size="15" value="#{custodianAccountList.name}" style="width:200px" />
               <a:commandButton id="search" value="Search Custodian" action="#{custodianAccountList.getSearchedPortfolios}"  reRender="portfolioListId,ajaxLoadingModalBox" onclick="Richfaces.showModalPanel('ajaxLoadingModalBox',{width:300, top:300})"/>
      </h:panelGrid>
       </a:form>  
      <a:form>
           <rich:spacer height="30"/>
       <rich:scrollableDataTable width="100%" 
                      id="portfolioListId" rows="40" selectionMode="multi" rowKeyVar="rkv" 
                value="#{searchedPortfolios}" var="costodianAccountRow" selection="#{custodianAccountList.selection}">
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Portfolio Number" /></f:facet>
                    <h:outputText value="#{costodianAccountRow.portfolio.portfolioNumber}" />
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Portfolio Name" /></f:facet>
                    <s:link view="/portfolio/#{empty from ? 'Portfolio' : from}.xhtml" value="#{costodianAccountRow.portfolio.name}" id="account" styleClass="tooltip-text">
                        <f:param name="portfolioId" value="#{costodianAccountRow.portfolio.id}" />
                    </s:link>
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Cash Control Administrator" /></f:facet>
                    <s:link view="/party/#{empty from ? 'Person' : from}.xhtml" value="#{costodianAccountRow.cca.fullName}">
                        <f:param name="personId" value="#{costodianAccountRow.cca.id}" />
                    </s:link>  
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Lending Agent" /></f:facet>
                    <s:link view="/party/#{empty from ? 'Person' : from}.xhtml" value="#{costodianAccountRow.lendingAgent.name}">
                        <f:param name="personId" value="#{costodianAccountRow.lendingAgent.id}" />
                    </s:link>  
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Trade Contact" /></f:facet>
                    <s:link view="/party/#{empty from ? 'Person' : from}.xhtml" value="#{costodianAccountRow.tradeContact.name}">
                        <f:param name="personId" value="#{costodianAccountRow.tradeContact.id}" />
                    </s:link>  
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Custodian Bank" /></f:facet>
                    <h:outputText value="#{costodianAccountRow.bank.name}" /> 
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Branch" /></f:facet>
                    <h:outputText value="#{costodianAccountRow.branch.name}" />
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Failed Trade DataSource" /></f:facet>
                    <h:outputText value="#{costodianAccountRow.failedTradeDataSource}" /> 
                </rich:column>
                
                <rich:column >
                    <f:facet name="header"><h:outputText styleClass="headerText" value="Security Lending Allowed" /></f:facet>
                    <h:outputText value="#{costodianAccountRow.securityLendingAllowed}" />
                </rich:column>

      </rich:scrollableDataTable>
       <rich:spacer height="20px"/>
      <h:panelGrid columns="6" id="updateCcaGrid" border="0">
      <s:decorate id="ccaDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.custodianAccount.cca']} </ui:define>
                    
                    <h:selectOneMenu value="#{custodianAccountList.cca}"  style="width:110px" id="ccaId" required="false">
                         <s:selectItems value="#{allPersonExcludingEmployeeContext}" var="ccaVar"  label="#{ccaVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       <s:decorate id="tradeContactDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.custodianAccount.tradeContact']} </ui:define>
                    <h:selectOneMenu value="#{custodianAccountList.tradeContact}"  style="width:110px" id="tradeContactaId" required="false">
                         <s:selectItems value="#{allPersonExcludingEmployeeContext}" var="tradeContactVar"  label="#{tradeContactVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       <s:decorate id="accountingContactDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.custodianAccount.accountingContact']} </ui:define>
                    <h:selectOneMenu value="#{custodianAccountList.accountingContact}"  style="width:110px" id="accountingContactId" required="false">
                         <s:selectItems value="#{allPersonExcludingEmployeeContext}" var="accountingContactVar"  label="#{accountingContactVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       
       <s:decorate id="lendingAgentDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.custodianAccount.lendingAgent']} </ui:define>
                    <h:selectOneMenu value="#{custodianAccountList.lendingAgent}"  style="width:110px" id="lendingAgentId" required="false">
                         <s:selectItems value="#{allPersonExcludingEmployeeContext}" var="lendingAgentVar"  label="#{lendingAgentVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       
       <s:decorate id="bankDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.account.custodian']} </ui:define>
                    <h:selectOneMenu value="#{custodianAccountList.bank}"  style="width:110px" id="bankId" required="false">
                         <s:selectItems value="#{allCustodians}" var="bankVar"  label="#{bankVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       
       <s:decorate id="branchDecoration" template="../layout/edit.xhtml">
                    <ui:define name="label">#{messages['label.account.custodianbranch']} </ui:define>
                    <h:selectOneMenu value="#{custodianAccountList.branch}"  style="width:110px" id="custodianId" required="false">
                         <s:selectItems value="#{allCustodianBranches}" var="custodianVar"  label="#{custodianVar.name}" noSelectionLabel="Please Select.."/>
                         <s:convertEntity/>
                    </h:selectOneMenu>
       </s:decorate>
       <h:commandButton action="#{custodianAccountList.updateSelection}" value="Update"/>
                     
      </h:panelGrid>
     </a:form>
     </rich:panel>
     </ui:define>
</ui:composition>

Java Bean code:

package com.xyz.party.action;

import java.util.Iterator;
import java.util.List;

import javax.persistence.EntityManager;

import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.Begin;
import org.jboss.seam.annotations.End;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.annotations.datamodel.DataModel;
import org.jboss.seam.faces.FacesMessages;
import org.jboss.seam.framework.EntityQuery;
import org.richfaces.model.selection.Selection;

import com.xyz.party.Bank;
import com.xyz.party.BankBranch;
import com.xyz.party.Person;
import com.xyz.portfolio.CustodianAccount;
import com.xyz.portfolio.action.ArmConstant;


/**
 * @author NKrishnawat
 *
 */
@Name("custodianAccountList")
@Scope(ScopeType.CONVERSATION)
public class CustodianAccountList extends EntityQuery<CustodianAccount>{

    private static final String EJBQL = "select t.id, t.name,t.primary_account_number, t.cca, t.lending_agent,t.data_source from custodian_account t";

    @In
    private transient FacesMessages facesMessages;
    
    @In
    EntityManager entityManager;

    public CustodianAccountList() {
        setEjbql(EJBQL);
        setMaxResults(new Integer(ArmConstant.MAX_QUERY_RESULTS_CONSTANT));
    }

    private Person cca,tradeContact,accountingContact,lendingAgent;
    
    private Bank bank;
    
    private BankBranch branch;

    private Selection selection;
    
    public Selection getSelection() {
        return selection;
    }
    
    public void setSelection(Selection selection) {
        this.selection = selection;
    }

    @End(beforeRedirect=true)
    public String updateSelection() {
        Iterator<Object> itr = selection.getKeys();
        try{
            while(itr.hasNext()){
                Integer indexNumber = (Integer)itr.next();
                CustodianAccount managedEntity = ((CustodianAccount)searchedPortfolios.get(indexNumber.intValue()));
                managedEntity.setCca(cca);
                if(tradeContact!=null){
                     managedEntity.setTradeContact(tradeContact);
                }
                if(accountingContact!=null){
                     managedEntity.setAccountingContact(accountingContact);
                }
                if(lendingAgent!=null){
                     managedEntity.setLendingAgent(lendingAgent);     
                }
                if(bank!=null){
                     managedEntity.setBank(bank);     
                }
                if(branch!=null){
                     managedEntity.setBranch(branch);     
                }
                entityManager.persist(managedEntity);
            }
            entityManager.flush();
            this.facesMessages.addFromResourceBundle("custodianaccountccaupdate.success");
        }catch(Exception exception){
            this.facesMessages.addFromResourceBundle("custodianaccountccaupdate.faliure");
        }
        return null;
    }
    
    @DataModel
    List<CustodianAccount> searchedPortfolios;
    
    List<CustodianAccount> toUpdateList;
    
    @SuppressWarnings("unchecked")
    @Begin(join=true)
    public List<CustodianAccount> getSearchedPortfolios(){
        if(name==null){ return null; }
        searchedPortfolios = entityManager.createQuery(ArmConstant.getUpdatePortfolioResultListQuery(name)).getResultList();
        return searchedPortfolios;
    }
    
    private int portfolioNumber;
    
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPortfolioNumber() {
        return portfolioNumber;
    }

    public void setPortfolioNumber(int portfolioNumber) {
        this.portfolioNumber = portfolioNumber;
    }
    
    public void search(){
        
    }
    
    public Person getCca() {
        return cca;
    }
    public void setCca(Person cca) {
        this.cca = cca;
    }

     public Person getTradeContact() {
          return tradeContact;
     }

     public void setTradeContact(Person tradeContact) {
          this.tradeContact = tradeContact;
     }

     public Person getAccountingContact() {
          return accountingContact;
     }

     public void setAccountingContact(Person accountingContact) {
          this.accountingContact = accountingContact;
     }

     public Bank getBank() {
          return bank;
     }

     public void setBank(Bank bank) {
          this.bank = bank;
     }

     public BankBranch getBranch() {
          return branch;
     }

     public void setBranch(BankBranch branch) {
          this.branch = branch;
     }

     public Person getLendingAgent() {
          return lendingAgent;
     }

     public void setLendingAgent(Person lendingAgent) {
          this.lendingAgent = lendingAgent;
     }
}

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