Going stateless

src/main/java/org/springframework/samples/petclinic/model/BaseEntity.java

@@ -45,4 +45,20 @@ public class BaseEntity {
         return (this.id == null);
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        BaseEntity that = (BaseEntity) o;
+
+        if (id != null ? !id.equals(that.id) : that.id != null) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        return id != null ? id.hashCode() : 0;
+    }
 }

src/main/java/org/springframework/samples/petclinic/web/OwnerController.java

@@ -23,7 +23,6 @@ import org.springframework.ui.Model;
 import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.support.SessionStatus;
 import org.springframework.web.servlet.ModelAndView;
 
 import javax.validation.Valid;
@@ -36,7 +35,6 @@ import java.util.Collection;
  * @author Michael Isvy
  */
 @Controller
-@SessionAttributes(types = Owner.class)
 public class OwnerController {
 
     private final ClinicService clinicService;
@@ -60,12 +58,11 @@ public class OwnerController {
     }
 
     @RequestMapping(value = "/owners/new", method = RequestMethod.POST)
-    public String processCreationForm(@Valid Owner owner, BindingResult result, SessionStatus status) {
+    public String processCreationForm(@Valid Owner owner, BindingResult result) {
         if (result.hasErrors()) {
             return "owners/createOrUpdateOwnerForm";
         } else {
             this.clinicService.saveOwner(owner);
-            status.setComplete();
             return "redirect:/owners/" + owner.getId();
         }
     }
@@ -110,12 +107,12 @@ public class OwnerController {
     }
 
     @RequestMapping(value = "/owners/{ownerId}/edit", method = RequestMethod.PUT)
-    public String processUpdateOwnerForm(@Valid Owner owner, BindingResult result, SessionStatus status) {
+    public String processUpdateOwnerForm(@PathVariable("ownerId") int ownerId, @Valid Owner owner, BindingResult result) {
         if (result.hasErrors()) {
             return "owners/createOrUpdateOwnerForm";
         } else {
+            owner.setId(ownerId);
             this.clinicService.saveOwner(owner);
-            status.setComplete();
             return "redirect:/owners/{ownerId}";
         }
     }

src/main/java/org/springframework/samples/petclinic/web/PetController.java

@@ -25,7 +25,6 @@ import org.springframework.ui.Model;
 import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.support.SessionStatus;
 
 import java.util.Collection;
 
@@ -35,7 +34,6 @@ import java.util.Collection;
  * @author Arjen Poutsma
  */
 @Controller
-@SessionAttributes("pet")
 public class PetController {
 
     private final ClinicService clinicService;
@@ -66,13 +64,14 @@ public class PetController {
     }
 
     @RequestMapping(value = "/owners/{ownerId}/pets/new", method = RequestMethod.POST)
-    public String processCreationForm(@ModelAttribute("pet") Pet pet, BindingResult result, SessionStatus status) {
+    public String processCreationForm(@PathVariable("ownerId") int ownerId, @ModelAttribute("pet") Pet pet, BindingResult result) {
+        Owner owner = this.clinicService.findOwnerById(ownerId);
+        owner.addPet(pet);
         new PetValidator().validate(pet, result);
         if (result.hasErrors()) {
             return "pets/createOrUpdatePetForm";
         } else {
             this.clinicService.savePet(pet);
-            status.setComplete();
             return "redirect:/owners/{ownerId}";
         }
     }
@@ -85,14 +84,20 @@ public class PetController {
     }
 
     @RequestMapping(value = "/owners/{ownerId}/pets/{petId}/edit", method = {RequestMethod.PUT, RequestMethod.POST})
-    public String processUpdateForm(@ModelAttribute("pet") Pet pet, BindingResult result, SessionStatus status) {
+    public String processUpdateForm(@PathVariable("ownerId") int ownerId,
+                                    @PathVariable("petId") int petId,
+                                    @ModelAttribute("pet") Pet pet,
+                                    BindingResult result) {
+
+        pet.setId(petId);
+        Owner owner = this.clinicService.findOwnerById(ownerId);
+        owner.addPet(pet);
         // we're not using @Valid annotation here because it is easier to define such validation rule in Java
         new PetValidator().validate(pet, result);
         if (result.hasErrors()) {
             return "pets/createOrUpdatePetForm";
         } else {
             this.clinicService.savePet(pet);
-            status.setComplete();
             return "redirect:/owners/{ownerId}";
         }
     }

src/main/java/org/springframework/samples/petclinic/web/VisitController.java

@@ -24,7 +24,6 @@ import org.springframework.ui.Model;
 import org.springframework.validation.BindingResult;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.support.SessionStatus;
 import org.springframework.web.servlet.ModelAndView;
 
 import javax.validation.Valid;
@@ -36,7 +35,6 @@ import javax.validation.Valid;
  * @author Michael Isvy
  */
 @Controller
-@SessionAttributes("visit")
 public class VisitController {
 
     private final ClinicService clinicService;
@@ -62,12 +60,13 @@ public class VisitController {
     }
 
     @RequestMapping(value = "/owners/{ownerId}/pets/{petId}/visits/new", method = RequestMethod.POST)
-    public String processNewVisitForm(@Valid Visit visit, BindingResult result, SessionStatus status) {
+    public String processNewVisitForm(@PathVariable("petId") int petId, @Valid Visit visit, BindingResult result) {
+        Pet pet = this.clinicService.findPetById(petId);
+        visit.setPet(pet);
         if (result.hasErrors()) {
             return "pets/createOrUpdateVisitForm";
         } else {
-            this.clinicService.saveVisit(visit);
-            status.setComplete();
+            this.clinicService.saveVisit(visit);;
             return "redirect:/owners/{ownerId}";
         }
     }

src/main/webapp/WEB-INF/jsp/exception.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <html lang="en">
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

src/main/webapp/WEB-INF/jsp/fragments/bodyHeader.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 

src/main/webapp/WEB-INF/jsp/fragments/footer.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 
 <table class="footer">

src/main/webapp/WEB-INF/jsp/fragments/headTag.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 
 <!--

src/main/webapp/WEB-INF/jsp/owners/createOrUpdateOwnerForm.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

src/main/webapp/WEB-INF/jsp/owners/findOwners.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

src/main/webapp/WEB-INF/jsp/owners/ownerDetails.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

src/main/webapp/WEB-INF/jsp/owners/ownersList.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

src/main/webapp/WEB-INF/jsp/pets/createOrUpdatePetForm.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

src/main/webapp/WEB-INF/jsp/pets/createOrUpdateVisitForm.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

src/main/webapp/WEB-INF/jsp/vets/vetList.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

src/main/webapp/WEB-INF/jsp/welcome.jsp

@@ -1,3 +1,4 @@
+<%@page session="false" %>
 <%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>