spring boot 1.5.1- hibernate second level cache

问题

I am trying to implement hibernate second level cache in spring-boot 1.5.1 . Facing the below error

Caused by: org.hibernate.cache.NoCacheRegionFactoryAvailableException: Second-level cache is used in the application, but property hibernate.cache.region.factory_class is not given; please either disable second level cache or set correct region factory using the hibernate.cache.region.factory_class setting and make sure the second level cache provider (hibernate-infinispan, e.g.) is available on the classpath.

Session cofiguration

hibernateProperties.put("hibernate.cache.use_second_level_cache", true);
hibernateProperties.put("hibernate.cache.provider_class", "org.hibernate.cache.EhCacheProvider");
hibernateProperties.put("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.EhCacheRegionFactory");

JPA POJO

@Entity
@Cacheable
@Cache(usage= CacheConcurrencyStrategy.READ_ONLY, region="messageCache")
@Table(name="AWARD")
public class Award {

ehcache.xml

<?xml version="1.0" encoding="UTF-8"?>
<ehcache>
    <defaultCache eternal="true" maxElementsInMemory="1000" overflowToDisk="false" />
    <cache name="messageCache" maxElementsInMemory="100" eternal="true" overflowToDisk="false" />
</ehcache>

回答1:

I just tested this using Spring Boot 1.5.1 and Hibernate 5.2.8 using the following settings in hibernate.properties (even specifying the properties when creating the entity manager bean in java config works too)

hibernate.cache.use_second_level_cache=true   
hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactory

I setup a simple entity as follows:

@Entity
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.READ_ONLY, region = "simpleCache")
public class Simple {
}

And specified my ehcache.xml as follows:

<?xml version="1.0" encoding="UTF-8"?>
<ehcache>
  <defaultCache eternal="true" maxElementsInMemory="1000" overflowToDisk="false"/>
  <cache name="simpleCache" maxElementsInMemory="100" eternal="true" overflowToDisk="false" />
</ehcache>

The pom.xml things:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.hibernate.stackoverflow</groupId>
    <artifactId>stackoverflow</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>stackoverflow</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.8.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-ehcache</artifactId>
            <version>5.2.8.Final</version>
        </dependency>

        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-core</artifactId>
            <version>2.4.3</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

Spring starts up just fine:

INFO 8674 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {5.2.8.Final}
INFO 8674 --- [           main] org.hibernate.cfg.Environment            : HHH000205: Loaded properties from resource hibernate.properties: {hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.EhCacheRegionFactory, hibernate.cache.use_second_level_cache=true, hibernate.bytecode.use_reflection_optimizer=false}
INFO 8674 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
INFO 8674 --- [           main] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
WARN 8674 --- [           main] c.e.i.s.EhcacheAccessStrategyFactoryImpl : HHH020007: read-only cache configured for mutable entity [simpleCache]

回答2:

It is NOT a classpath issue. It is a missing hibernate configuration. So basically, your session configuration is not reaching hibernate.

I can't tell why because I don't know how hibernate was initialized. I can show you a working Spring-boot implementation though. With Ehcache 3.

https://github.com/spring-projects/spring-petclinic/blob/master/src/main/java/org/springframework/samples/petclinic/system/CacheConfiguration.java

and a fully configured cache in JHipster: https://github.com/ehcache/ehcache3-samples/blob/master/fullstack/src/main/java/org/ehcache/sample/config/CacheConfiguration.java

回答3:

You need to add ehcache jar to your class path. The one you listed in the comment above is not the ehcache jar.

This is what you need to add:

https://mvnrepository.com/artifact/net.sf.ehcache/ehcache/2.10.3

回答4:

spring.jpa.properties.hibernate.cache.use_second_level_cache=true
spring.jpa.properties.hibernate.cache.region.factory_class=org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory
spring.jpa.properties.hibernate.cache.use_query_cache=true

Had same issue, appending your property with this spring.jpa.properties is important if you are using Spring JPA.

来源：https://stackoverflow.com/questions/42457760/spring-boot-1-5-1-hibernate-second-level-cache

标签

hibernate

spring-boot

Ehcache