Question

我们正在将项目迁移到Hibernate 5，并且启动时间很慢。

Hibernate似乎在org.hibernate.persister.walking.spi.MetamodelGraphWalker

中花了很多时间

2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s23>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s24>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s25>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s26>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s27>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s28>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s29>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s30>
2018-02-06 07:24:49,167 DEBUG [org.hibernate.persister.walking.spi.MetamodelGraphWalker] - <Visiting attribute path : s31>

以下是Hibernate的配置方式：

hibernateProp.put(Environment.HBM2DDL_AUTO, "update");
hibernateProp.put(Environment.CURRENT_SESSION_CONTEXT_CLASS,"org.hibernate.context.internal.ThreadLocalSessionContext");
hibernateProp.put(Environment.DIALECT, "com.orbis.portal.OrbisSQLServerDialect");
hibernateProp.put("org.hibernate.flushMode", "COMMIT");
hibernateProp.put(Environment.USE_QUERY_CACHE, "true");
hibernateProp.put(Environment.CACHE_REGION_FACTORY, "org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory");
hibernateProp.put(Environment.CACHE_PROVIDER_CONFIG, "classpath:ehcache.xml");
hibernateProp.put(Environment.USE_SECOND_LEVEL_CACHE, "true");
hibernateProp.put("hibernate.enable_lazy_load_no_trans", "true");
hibernateProp.put("hibernate.jdbc.use_get_generated_keys", "true");

以下是会话工厂的构建方式：

final BootstrapServiceRegistry bootstrapServiceRegistry = new BootstrapServiceRegistryBuilder()
                .enableAutoClose()
                .applyIntegrator(MetadataExtractorIntegrator.INSTANCE).build();

registry = new StandardServiceRegistryBuilder(bootstrapServiceRegistry)
                .applySettings(getHibernateSettings()).build();

MetadataSources sources = new MetadataSources(registry);

processHbmMappings(sources);

processAnnotatedMappings(sources);

Metadata metadata = sources.getMetadataBuilder().build();

sessionFactory = metadata.getSessionFactoryBuilder().build();

有什么想法吗？

更新

OrbisSQLServerDialect只是扩展SQLServer2008Dialect来改变几个列类型

public class OrbisSQLServerDialect extends SQLServer2008Dialect
{
    public OrbisSQLServerDialect()
    {
        super();
        registerColumnType(Types.TIMESTAMP, "datetime");
        registerColumnType(Types.BOOLEAN, "tinyint");
    }
}

使用OrbisSQLServerDialect进行Hibernate 5慢启动

0 个答案: