Adding cache

pom.xml

@@ -148,6 +148,10 @@
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-entitymanager</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-ehcache</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-validator</artifactId>

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

@@ -15,6 +15,7 @@
  */
 package org.springframework.samples.petclinic.model;
 
+import org.hibernate.annotations.CacheConcurrencyStrategy;
 import org.hibernate.validator.constraints.NotEmpty;
 import org.springframework.beans.support.MutableSortDefinition;
 import org.springframework.beans.support.PropertyComparator;
@@ -34,6 +35,7 @@
  */
 @Entity
 @Table(name = "owners")
+@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
 public class Owner extends Person {
     @Column(name = "address")
     @NotEmpty
@@ -48,7 +50,8 @@ public class Owner extends Person {
     @Digits(fraction = 0, integer = 10)
     private String telephone;
 
-    @OneToMany(cascade = CascadeType.ALL, mappedBy = "owner")
+    @OneToMany(mappedBy = "owner")
+    @org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
     private Set<Pet> pets;
 
 

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

@@ -15,6 +15,7 @@
  */
 package org.springframework.samples.petclinic.model;
 
+import org.hibernate.annotations.CacheConcurrencyStrategy;
 import org.hibernate.annotations.Type;
 import org.joda.time.DateTime;
 import org.springframework.beans.support.MutableSortDefinition;
@@ -33,6 +34,7 @@
  */
 @Entity
 @Table(name = "pets")
+@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
 public class Pet extends NamedEntity {
 
     @Column(name = "birth_date")
@@ -48,7 +50,8 @@ public class Pet extends NamedEntity {
     @JoinColumn(name = "owner_id")
     private Owner owner;
 
-    @OneToMany(cascade = CascadeType.ALL, mappedBy = "pet")
+    @OneToMany(mappedBy = "pet")
+    @org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
     private Set<Visit> visits;
 
 

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

@@ -15,6 +15,9 @@
  */
 package org.springframework.samples.petclinic.model;
 
+import org.hibernate.annotations.CacheConcurrencyStrategy;
+
+import javax.persistence.Cacheable;
 import javax.persistence.Entity;
 import javax.persistence.Table;
 
@@ -23,6 +26,7 @@
  */
 @Entity
 @Table(name = "types")
+@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
 public class PetType extends NamedEntity {
 
 }

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

@@ -15,6 +15,7 @@
  */
 package org.springframework.samples.petclinic.model;
 
+import org.hibernate.annotations.CacheConcurrencyStrategy;
 import org.hibernate.annotations.Type;
 import org.hibernate.validator.constraints.NotEmpty;
 import org.joda.time.DateTime;
@@ -29,6 +30,7 @@
  */
 @Entity
 @Table(name = "visits")
+@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
 public class Visit extends BaseEntity {
 
     /**

src/main/java/org/springframework/samples/petclinic/repository/jpa/JpaOwnerRepositoryImpl.java

@@ -23,6 +23,7 @@
 import javax.persistence.PersistenceContext;
 import javax.persistence.Query;
 import java.util.Collection;
+import org.springframework.cache.annotation.Cacheable;
 
 /**
  * JPA implementation of the {@link OwnerRepository} interface.
@@ -42,6 +43,7 @@ public class JpaOwnerRepositoryImpl implements OwnerRepository {
 
     @Override
     @SuppressWarnings("unchecked")
+    @Cacheable(value = "ownersByLastName")
     public Collection<Owner> findByLastName(String lastName) {
         // using 'join fetch' because a single query should load both owners and pets
         // using 'left join fetch' because it might happen that an owner does not have pets yet
@@ -52,18 +54,13 @@ public Collection<Owner> findByLastName(String lastName) {
 
     @Override
     public Owner findById(int id) {
-        // using 'join fetch' because a single query should load both owners and pets
-        // using 'left join fetch' because it might happen that an owner does not have pets yet
-        Query query = this.em.createQuery("SELECT owner FROM Owner owner left join fetch owner.pets WHERE owner.id =:id");
-        query.setParameter("id", id);
-        return (Owner) query.getSingleResult();
+        return em.find(Owner.class, id);
     }
 
 
     @Override
     public void save(Owner owner) {
-        this.em.merge(owner);
-
+        em.merge(owner);
     }
 
 }

src/main/java/org/springframework/samples/petclinic/repository/jpa/JpaPetRepositoryImpl.java

@@ -19,6 +19,7 @@
 import org.springframework.samples.petclinic.model.PetType;
 import org.springframework.samples.petclinic.repository.PetRepository;
 import org.springframework.stereotype.Repository;
+import org.springframework.cache.annotation.Cacheable;
 
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
@@ -41,6 +42,7 @@ public class JpaPetRepositoryImpl implements PetRepository {
 
     @Override
     @SuppressWarnings("unchecked")
+    @Cacheable(value = "pettype")
     public List<PetType> findPetTypes() {
         return this.em.createQuery("SELECT ptype FROM PetType ptype ORDER BY ptype.name").getResultList();
     }

src/main/java/org/springframework/samples/petclinic/repository/jpa/JpaVisitRepositoryImpl.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.samples.petclinic.repository.jpa;
 
+import org.springframework.samples.petclinic.model.Pet;
 import org.springframework.samples.petclinic.model.Visit;
 import org.springframework.samples.petclinic.repository.VisitRepository;
 import org.springframework.stereotype.Repository;
@@ -51,9 +52,8 @@ public void save(Visit visit) {
     @Override
     @SuppressWarnings("unchecked")
     public List<Visit> findByPetId(Integer petId) {
-        Query query = this.em.createQuery("SELECT visit FROM Visit v where v.pets.id= :id");
-        query.setParameter("id", petId);
-        return query.getResultList();
+        Pet pet = em.find(Pet.class, petId);
+        return pet.getVisits();
     }
 
 }

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

@@ -63,6 +63,7 @@ public String initNewVisitForm(@PathVariable("petId") int petId, Model model) {
     public String processNewVisitForm(@PathVariable("petId") int petId, @Valid Visit visit, BindingResult result) {
         Pet pet = this.clinicService.findPetById(petId);
         visit.setPet(pet);
+        pet.addVisit(visit);
         if (result.hasErrors()) {
             return "pets/createOrUpdateVisitForm";
         } else {

src/main/resources/ehcache.xml

@@ -13,5 +13,37 @@
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="1"
            memoryStoreEvictionPolicy="LRU"/>
+
+	<cache name="ownersByLastName"
+           timeToLiveSeconds="60"
+           maxElementsInMemory="10000"/>
+
+    <cache name="pettype"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="10000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.Pet"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="10000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.Pet.visits"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="100000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.Visit"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="100000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.Owner"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="10000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.Owner.pets"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="100000"/>
+
+    <cache name="org.springframework.samples.petclinic.model.PetType"
+           timeToLiveSeconds="600"
+           maxElementsInMemory="100"/>
 
 </ehcache>

src/main/resources/spring/business-config.xml

@@ -58,6 +58,13 @@
             <!-- gDickens: BOTH Persistence Unit and Packages to Scan are NOT compatible, persistenceUnit will win -->
             <property name="persistenceUnitName" value="petclinic"/>
             <property name="packagesToScan" value="org.springframework.samples.petclinic"/>
+            <property name="jpaProperties">
+                <props>
+                    <prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory</prop>
+                    <prop key="hibernate.cache.use_second_level_cache">true</prop>
+                    <prop key="hibernate.cache.use_query_cache">false</prop>
+                </props>
+            </property>
         </bean>
 
         <!-- Transaction manager for a single JPA EntityManagerFactory (alternative to JTA) -->

src/main/resources/spring/tools-config.xml

@@ -43,6 +43,7 @@
 
     <bean id="ehcache" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
         <property name="configLocation" value="classpath:ehcache.xml"/>
+        <property name="shared" value="true"/>
     </bean>