我是春天的新手,hibernate,c3p0&的Ehcache。我正在使用Java配置完全开发一个应用程序,除了web.xml。我必须在我的应用程序中使用二级缓存。所以我添加了以下代码
import net.sf.ehcache.config.CacheConfiguration;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurer;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.ehcache.EhCacheCacheManager;
import org.springframework.cache.interceptor.CacheErrorHandler;
import org.springframework.cache.interceptor.CacheResolver;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.cache.interceptor.SimpleKeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableCaching
public class CachingConfig implements CachingConfigurer{
@Bean(destroyMethod="shutdown")
public net.sf.ehcache.CacheManager ehCacheManager() {
CacheConfiguration cacheConfiguration = new CacheConfiguration();
cacheConfiguration.setName("myCacheName");
cacheConfiguration.setMemoryStoreEvictionPolicy("LRU");
cacheConfiguration.setMaxEntriesLocalHeap(1000);
net.sf.ehcache.config.Configuration config = new net.sf.ehcache.config.Configuration();
config.addCache(cacheConfiguration);
return net.sf.ehcache.CacheManager.newInstance(config);
}
@Bean
@Override
public CacheManager cacheManager() {
return new EhCacheCacheManager(ehCacheManager());
}
@Override
public CacheResolver cacheResolver() {
return null;
}
@Override
public CacheErrorHandler errorHandler() {
return null;
}
@Override
public KeyGenerator keyGenerator() {
return new SimpleKeyGenerator();
}
}
在web.xml中我将其添加为
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
ApplicationContextConfiguration
CachingConfig
</param-value>
</context-param>
我的ApplicationContextConfiguration是
import java.beans.PropertyVetoException;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import com.mchange.v2.c3p0.ComboPooledDataSource;
@Configuration
@EnableTransactionManagement
public class ApplicationContextConfiguration
{
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws IOException {
LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
entityManagerFactory.setDataSource(pooledDataSource());
entityManagerFactory.setPackagesToScan(new String[] { "*" });
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
entityManagerFactory.setJpaVendorAdapter(vendorAdapter);
entityManagerFactory.setJpaProperties(additionalProperties());
return entityManagerFactory;
}
@Bean
public ComboPooledDataSource pooledDataSource() throws IOException{
ComboPooledDataSource dataSource = new ComboPooledDataSource();
Properties properties = new Properties();
BufferedReader input = new BufferedReader (new InputStreamReader (getClass().getResourceAsStream("/config/hibernate.properties")));
properties.load(input);
try {
dataSource.setDriverClass(properties.getProperty("hibernate.connection.driver_class"));
} catch (PropertyVetoException e) {
e.printStackTrace();
}
dataSource.setJdbcUrl(properties.getProperty("hibernate.connection.url"));
dataSource.setUser(properties.getProperty("hibernate.connection.username"));
dataSource.setPassword(properties.getProperty("hibernate.connection.password"));
dataSource.setMaxPoolSize(Integer.parseInt(properties.getProperty("hibernate.c3p0.max_size")));
dataSource.setMinPoolSize(Integer.parseInt(properties.getProperty("hibernate.c3p0.min_size")));
dataSource.setCheckoutTimeout(Integer.parseInt(properties.getProperty("hibernate.c3p0.timeout")));
dataSource.setMaxStatements(Integer.parseInt(properties.getProperty("hibernate.c3p0.max_statements")));
dataSource.setIdleConnectionTestPeriod(Integer.parseInt(properties.getProperty("hibernate.c3p0.idle_test_period")));
dataSource.setAcquireIncrement(Integer.parseInt(properties.getProperty("hibernate.c3p0.acquire_increment")));
return dataSource;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
return new PersistenceExceptionTranslationPostProcessor();
}
Properties additionalProperties() throws IOException {
Properties properties = new Properties();
Properties hibernateProperties = new Properties();
BufferedReader input = new BufferedReader (new InputStreamReader (getClass().getResourceAsStream("/config/hibernate.properties")));
hibernateProperties.load(input);
properties.setProperty("hibernate.dialect", hibernateProperties.getProperty("hibernate.dialect"));
return properties;
}
}
当我尝试运行时,我收到以下错误
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 class name to property hibernate.cache.region.factory_class (and make sure the second level cache provider, hibernate-infinispan, for example, is available in the classpath).
我明白我必须添加
<property name="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</property>
但不确定在何处以及如何通过Java配置添加它。请有人帮忙。
另外,我是否需要添加以下内容?
<property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.use_query_cache">true</property>
答案 0 :(得分:1)
假设您能够检索实体并且您只想启用二级缓存:
在现有的additionalProperties()
方法中添加以下属性。
properties.setProperty("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory");
properties.setProperty("hibernate.cache.use_second_level_cache", "true");
properties.setProperty("hibernate.cache.use_query_cache", "true");
并在entity
您要在该实体上启用二级缓存位置@Cache
注释:@Cache(usage=CacheConcurrencyStrategy.READ_WRITE)
您可以删除CachingConfig
类,因为它与为Hibernate启用二级缓存无关。