new project showing hibernate second-level caching with spring data j…

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spring-data-hibernate-caching/build.gradle

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+apply plugin: 'groovy'
+apply plugin: 'idea'
+
+repositories { mavenCentral() }
+dependencies {
+    compile(
+        'org.codehaus.groovy:groovy-all:2.1.1',
+        'org.hibernate:hibernate-core:3.5.2-Final',
+        'org.hibernate:hibernate-ehcache:3.5.2-Final',
+        'org.hibernate:hibernate-entitymanager:3.5.2-Final',
+        'net.sf.ehcache:ehcache:2.4.7',
+        'org.springframework:spring-core:3.1.0.RELEASE',
+        'org.springframework:spring-context:3.1.0.RELEASE',
+        'org.springframework.data:spring-data-jpa:1.2.0.RELEASE',
+        'ch.qos.logback:logback-classic:1.0.13',
+        'com.h2database:h2:1.3.172',
+    )
+}

spring-data-hibernate-caching/src/main/groovy/rds/testbed/Main.groovy

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+package rds.testbed;
+
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+class Main {
+    public static void main(String[] args) {
+        def context = new ClassPathXmlApplicationContext('/applicationContext.xml')
+        def repo = context.getBean(ThingRepo)
+        println "Saving bob"
+        // Like this, won't cache on save because of https://hibernate.atlassian.net/browse/HHH-7964
+        Thing saved = repo.save(new Thing('bob'))
+        println "Loading bob"
+        Thing loaded = repo.findByName('bob')
+        assert !saved.is(loaded)
+        assert saved.name == loaded.name
+        println "bob is: $loaded"
+        println "Loading bob again"
+        println "bob is: " + repo.findByName('bob')
+    }
+}

spring-data-hibernate-caching/src/main/java/rds/testbed/Thing.java

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+package rds.testbed;
+
+import org.hibernate.annotations.Cache;
+import org.hibernate.annotations.CacheConcurrencyStrategy;
+
+import javax.persistence.Cacheable;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+@Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
+public class Thing {
+    @Id @GeneratedValue
+    private long id;
+    private String name;
+
+    public Thing() {}
+
+    public Thing(String name) {
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Thing{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

spring-data-hibernate-caching/src/main/java/rds/testbed/ThingRepo.java

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+package rds.testbed;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.QueryHints;
+
+import javax.persistence.QueryHint;
+
+public interface ThingRepo extends JpaRepository<Thing, Long> {
+    @QueryHints({@QueryHint(name = "org.hibernate.cacheable", value = "true")})
+    Thing findByName(String name);
+}

spring-data-hibernate-caching/src/main/resources/META-INF/persistence.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<persistence version="2.0"
+             xmlns="http://java.sun.com/xml/ns/persistence"
+             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="
+                http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd
+             ">
+    <persistence-unit name="spring-data-hibernate-caching"/>
+</persistence>

spring-data-hibernate-caching/src/main/resources/applicationContext.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns:p="http://www.springframework.org/schema/p"
+       xmlns:jpa="http://www.springframework.org/schema/data/jpa"
+       xmlns:jdbc="http://www.springframework.org/schema/jdbc"
+       xsi:schemaLocation="
+        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
+        http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
+       ">
+
+    <jpa:repositories base-package="rds.testbed" />
+    <jdbc:embedded-database id="dataSource" type="H2"/>
+
+    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
+            p:dataSource-ref="dataSource"
+            p:persistenceUnitName="spring-data-hibernate-caching"
+            p:persistenceProvider-ref="provider">
+        <property name="jpaProperties">
+            <props>
+                <prop key="hibernate.hbm2ddl.auto">create</prop>
+                <prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
+                <prop key="hibernate.cache.use_query_cache">true</prop>
+                <!-- Should be set to some value according to docs, but doesn't seem necessary for this simple test -->
+                <!--<prop key="javax.persistence.sharedCache.mode">ALL</prop>-->
+            </props>
+        </property>
+    </bean>
+    <bean id="provider" class="org.hibernate.ejb.HibernatePersistence"/>
+
+    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"/>
+</beans>

spring-data-hibernate-caching/src/main/resources/ehcache.xml

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+<ehcache>
+    <cache name="org.hibernate.cache.StandardQueryCache"/>
+    <cache name="org.hibernate.cache.UpdateTimestampsCache"/>
+    <cache name="rds.testbed.Thing"/>
+</ehcache>

spring-data-hibernate-caching/src/main/resources/logback.xml

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+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.hibernate.SQL" level="trace"/>
+
+    <root level="info">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>