Please have a look at the following JSF page and at the definition of the managed bean class which it references.
When I run my app and load the page I get the results shown in the "Good Results" screen shot. Note that the page is displaying data and that the "Hello World" string printed by the bean's constructor appears in the console.
If I alter the bean's definition by commenting out the definition of the "junk" integer (near the top) then I get the results shown in the "Bad Results" screen shot. Now there is no data and, most tellingly, the "Hello World" string does not appear in the console. No errors are reported to the console. The page is being rendered but it appears as though the JSF engine has decided that it does not like the bean's definition and is therefore not going to use it (the constructor is not called).
I have tried mightily to produce a Minimal, Complete, and Verifiable example. I eliminated several forms from the JSF page (you can observe that much of the bean's code is no longer being referenced by the JSF page). I eliminated JPA from the picture by creating the DummyDataAccessService class. I tried to eliminate the use of one or more of my own custom classes (Order, Patient, Product, DataAccessService, and DummyDataAccessService) but I could not: almost any alteration of the bean's definition produces the same strange behavior that results from removing the definition of the "junk" member variable.
I created a custom logging.properties file which bumped the level to ALL. The logging produced by the Good vs. Bad cases were close to the same. The two "Logging Differences" screen shots below reveal the primary differences.
I do not know how to explore this further. I don't know enough to even conjecture what might be going on. Any clue or recommendation on a course of action will be greatly appreciated.
JSF Page
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>
<h:outputStylesheet library="default" name="css/style.css" />
<title>Managed Bean Problem</title>
</h:head>
<h:body>
<h3 class="title">Managed Bean Problem</h3>
<h:outputText value=" " />
<table align="center" width="600">
<tr><td><h:form>
<h:dataTable value="#{orderController.table}" var="order" styleClass="demo" columnClasses="columns, columns">
<h:column>
<f:facet name="header">
<h:column>
<h:outputText value="Patient"></h:outputText>
</h:column>
</f:facet>
<h:outputText value="#{order.patient.fullName}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:column>
<h:outputText value="Product"></h:outputText>
</h:column>
</f:facet>
<h:outputText value="#{order.product.name}"></h:outputText>
</h:column>
<h:column>
<f:facet name="header">
<h:column>
<h:outputText value="Actions"></h:outputText>
</h:column>
</f:facet>
<h:panelGrid columns="1">
<h:commandLink value="delete" action="#{orderController.delete}">
<f:setPropertyActionListener target="#{orderController.target}" value="#{order}" />
</h:commandLink>
</h:panelGrid>
</h:column>
</h:dataTable>
</h:form></td></tr>
</table>
</h:body>
Order Controller Managed Bean
package com.rvaessen.dmescripts.controllers;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.model.SelectItem;
import com.rvaessen.dmescripts.model.*;
@ManagedBean
public class OrderController {
private int junk; // Leave it in; Good. Comment it out; Bad.
private DataAccessService dataService = new DummyDataAccessService();
public OrderController() {
System.out.println("Hello, World");
}
@PostConstruct
public void init() {
initPatients();
initProducts();
initOrders();
}
// ********************************* The Orders Table ***************************************
private Order target;
private List<Order> table;
private void initOrders() { table = dataService.getOrders(); }
public List<Order> getTable() { return table; }
public void setTarget(Order order) { target = order; }
public String delete() {
dataService.removeOrder(target);
table.remove(target);
return null;
}
// ********************************* Add New Order ***************************************
// NOTE: The Add New Order methods are no longer referenced by the JSF page
private Order newOrder;
public String addNew() {
newOrder = new Order();
return null;
}
public String save() {
dataService.addOrder(newOrder, patient, product);
table.add(newOrder);
cancel();
return null;
}
public String cancel() {
newOrder = null;
return null;
}
public boolean getAddingNew() { return newOrder != null; }
/************************ The Patients Menu **********************************/
// NOTE: The Patients Menu methods are no longer referenced by the JSF page
private Patient patient;
private List<Patient> patients;
private void initPatients() {
patients = dataService.getPatients();
if (patients.size() > 0) patient = patients.get(0);
}
public List<SelectItem> getPatients() {
List<SelectItem> list = new ArrayList<SelectItem>();
patients.forEach(patient -> list.add(new SelectItem(patient.getId(), patient.getFullName())));
return list;
}
public Long getPatientId() {
return patient == null ? 0 : patient.getId();
}
public void setPatientId(Long id) {
patients.forEach(patient -> {
if (patient.getId() == id) {
this.patient = patient;
}
});
}
/************************ The Products Menu **********************************/
// NOTE: The Products Menu methods are no longer referenced by JSF page
private Product product;
private List<Product> products;
private void initProducts() {
products = dataService.getProducts();
if (products.size() > 0) product = products.get(0);
}
public List<SelectItem> getProducts() {
List<SelectItem> list = new ArrayList<SelectItem>();
if (patient != null) {
products.forEach(product -> {
if (product.getInsurance().equals(patient.getInsurance())) {
list.add(new SelectItem(product.getId(), product.getName()));
}
});
}
return list;
}
public Long getProductId() {
return product == null ? 0 : product.getId();
}
public void setProductId(Long id) {
products.forEach(product -> {
if (product.getId() == id) {
this.product = product;
}
});
}
}
Good Results
Bad Results
Log Differences 1
Log Differences 2
