Is there any way to create a custom ActionListener class in JSF so that I can intercept an exception if it occurs on pressing the command button using my own ActionListener class
I tried using the following code:
firstpage.jsp
<f:view>
<html>
<head>
<title>firstpage</title>
</head>
<body>
<h:form>
<h:commandButton id="button" value="submit"
actionListener="#{databasebean.fetchUserName}"/>
</h:form>
</body>
</html>
</f:view>
Dao.java
package getexception;
import java.sql.*;
import java.util.ArrayList;
import javax.faces.event.ActionEvent;
public class Dao {
String firstname;
private Connection con=null;
private Statement stmt = null;
private ResultSet rst = null;
private ArrayList ar;
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
String url = "jdbc:odbc:" + "new";
public Dao() {
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getFirstname() {
return firstname;
}
public void fetchUserName(ActionEvent ae) throws Exception{
Driver d= (Driver)Class.forName(driver).newInstance();
con = DriverManager.getConnection(url,"","");
stmt = con.createStatement();
rst=stmt.executeQuery("select firstname from employee where firstname like '%e'");
if(rst.next()) {
this.setFirstname(rst.getString("firstname"));
}
rst.close();
stmt.close();
con.close();
}}
NewActionListener.java
package getexception;
import com.sun.faces.application.ActionListenerImpl;
import javax.faces.application.Application;
import javax.faces.application.NavigationHandler;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;
public class NewActionListener extends ActionListenerImpl{
public void processAction(ActionEvent event) {
try {
System.out.println("try block");
super.processAction(event);
} catch (Exception exception) {
System.out.println("catch block");
FacesContext facesContext = FacesContext.getCurrentInstance();
Application application = facesContext.getApplication();
NavigationHandler navigationHandler = application.getNavigationHandler();
navigationHandler.handleNavigation(facesContext,null,"exceptionNavigation");
facesContext.renderResponse();
}
}}
faces-config.xml
<faces-config xmlns="http://java.sun.com/JSF/Configuration">
<managed-bean>
<managed-bean-name>databasebean</managed-bean-name>
<managed-bean-class>getexception.Dao</managed-bean-class>
<managed-bean-scope>application</managed-bean-scope>
</managed-bean>
<navigation-rule>
<navigation-case>
<from-outcome>exceptionNavigation</from-outcome>
<to-view-id>/error.jsp/<to-view-id>
</navigation-case>
</navigation-rule>
<application>
<action-listener>getexception.NewActionListener</action-listener>
</application>
<managed-bean>
<managed-bean-name>backing_hellopage</managed-bean-name>
<managed-bean-class>getexception.backing.Hellopage</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
error.jsp
<html>
<f:view>
<head>
<title>firstpage</title>
</head>
<body>
<h:form>
<h:outputText value="Exception succesfully navigated"/>
</h:form>
</body>
</f:view>
</html>
The code generated an SQL exception but it was not showing me the error.jsp page.
What have I misconfigured so that the error page is not showing when an exception fired?