<h:form id="userDetailsForm">
<p:panel header="User Details Form" style="width: 800px;">
  <p:messages/>
  <h:panelGrid columns="3">
    
    <p:outputLabel value="UserId:*"/>
    <p:inputText id="userId" value="#{userController.loginUser.id}" required="true" label="UserId" />
    <p:message id="userIdMsg" for="userId"/>
      
    <p:outputLabel value="UserName:*"/>
    <p:inputText id="userName" value="#{userController.loginUser.userName}" required="true" label="UserName" />      
    <p:message id="userNameMsg" for="userName"/>
      
    <p:outputLabel value="Password:*"/>
    <p:password id="password" value="#{userController.loginUser.password}" required="true" label="Password"/>
    <p:message id="passwordMsg" for="password"/>
      
    <p:outputLabel value="FirstName:*"/>
    <p:inputText id="firstName" value="#{userController.loginUser.firstName}" required="true"   label="FirstName"/>
    <p:message id="firstNameMsg" for="firstName"/>
      
    <p:commandButton value="Update" action="#{userController.updateUser()}" update="userDetailsForm"/>    
    <p:commandButton value="Delete" action="#{userController.deleteUser()}" update="userDetailsForm"/>
            
  </h:panelGrid>
</p:panel>
</h:form>

@ManagedBean
@RequestScoped
public class UserController 
{
  private User loginUser;
    
  public UserController() 
  {
    this.loginUser = new User();    
  }

  public User getLoginUser() 
  {
    return loginUser;
  }

  public void setLoginUser(User loginUser) 
  {
    this.loginUser = loginUser;
  }

  public String  updateUser() {
    System.out.println("Updating User Id: "+this.loginUser.getId());
    String msg = "User updated Successfully";
    FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg));
    return "userDetails.jsf";
  }
  
  public String  deleteUser() {
    System.out.println("deleting User Id: "+this.loginUser.getId());
    String msg = "User deleted Successfully";
    FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg));
    return "userDetails.jsf";
  }
}