jsf h:dataTable - not refreshing after deleting row - jsf

Question

Hello Guys i need your help as usual
Jsf h:dataTable - not refreshing after deleting row.
Not until i have to restart the programm.
what can i do please to resolve this problem?
Thanks John.
ManagedBean
public List<Customer> getCustomerList() {
if (customerList == null) {
customerList = new ArrayList<Customer>(bookstoreManager.getAllCustomers());
for (Customer cus : customerList) {
System.out.println("Hello" + cus.getFirstName() + "......." + cus.getLastName());
}
}
return customerList;
}
Business Logik
public List<Customer> getAllCustomers() {
TypedQuery<Customer> query = em.createQuery("Select c from Customer c", Customer.class);
return query.getResultList();
}
XHTML Code
<ui:define name="content">
<h:body>
<h:outputStylesheet name="css/style.css" />
<h:form id="form">
<h:dataTable var="cus" cellpadding="5" cellspacing="5" border="1"
width="400" styleClass="customerList"
value="#{customerBean.getCustomerList()}">
<h:column>
<f:facet name="header">
<h:outputText value="#{texts.firstName}" />
</f:facet>
<h:outputText value="#{cus.firstName}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{ texts.lastName}" />
</f:facet>
<h:outputText value="#{cus.lastName}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{texts.address}" />
</f:facet>
<h:outputText value="#{cus.address}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{texts.creditCard}" />
</f:facet>
<h:outputText value="#{cus.creditCard}" />
</h:column>
<h:column>
<h:commandLink action="#{customerBean.selectCustomer(cus)}"
value="Edit" />
</h:column>
<h:column headerText="Delete">
<h:commandLink value="#{texts.delete}"
action="#{customerBean.deleteCustomer(cus)}" />
</h:column>
</h:dataTable>
</h:form>
</h:body>
</ui:define>