Scope of managed bean for a modifiable list

Question

I have a business entity set stored in database. I want to show them with JSF as elements of a list with each element having a delete button. If the database changes in the background because entitites are removed or inserted, the delete function certainly must work well.
I'm clear of the key stuff I have to use:
-a managed bean, probably containing some list coming from database through dao or o/r mapper.
-some iterator, e.g. t:dataList (using Tomahawk)
-h:commandButton with action referring to methods in the managed-bean's elements.
The question is, what usually would be the scope of the managed-bean.
If the scope is "request", delete function may work wrong when database changes between the first and the "delete" request.
-First request: managed-bean created with ids and event handlers.
-Database changes: new entity is inserted.
-Secont request: managed-bean created with id-s and event handlers according to the new database content. id-s have been shifted.
It may help if I override somehow the default id generation of the JSF, by using directly id-s of business entities but I think it's an unproposed hack.
If the scope of the managed bean is "session", the delete function works well, however we've a lot of stuff to store in the session.
So, what would be the scope of the managed-bean?
Or a completely different approach should be used?

Answer 1

hi,
faces-config:---------
<faces-config version="1.2"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd">
<!-- ***************Country************-->
<managed-bean>
<managed-bean-name>countryMBean</managed-bean-name>
<managed-bean-class>com.tnhsp.mbeans.CountryMBean</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
<!-- ***************country************-->
<navigation-case> <!-- DEfault mode - Fetches all data in datatable -->
<from-outcome>fetch_country</from-outcome>
<to-view-id>/hospitalAdmin/country/countryDisplayContent.jsp</to-view-id>
<redirect/>
</navigation-case>
<navigation-case> <!-- Displayes the screen to add data -->
<from-outcome>add_country</from-outcome>
<to-view-id>/hospitalAdmin/country/countryCreateContent.jsp</to-view-id>
<redirect/>
</navigation-case>
</faces-config>
MBEAN:-----
public class CountryMBean {
@EJB
CountrySRemote countrySRemote;
private Country country = new Country();
public CountryMBean() {
System.out.println("countryMBean.countryMBean()");
country = new Country();
fc = FacesContext.getCurrentInstance();
public String actionAdd() {
renderFlag = 1;
errorStatus = "";
System.out.println("countryMBean. - actionadd");
retValue = "add_country";
setLinkMode(ADD_MODE");
setDisableCodeField("false");
saveStatus = "false";
listEmptyStatus = "false";
country = new Country();
Date dt = new Date();
country.setEffectFromDt(dt);
country.setCreatedDate(dt);
country.setLastUpdatedDate(dt);
country.setCreatedUser("user");
country.setLastUpdatedUser("user");
System.out.print("returning from actionadd");
return retValue;
Please help.