我们正在使用休眠将存储过程结果映射到 java 对象。它使用休眠 4.1.x 在 SQL Server 2008 上执行
@XmlRootElement(name = "hotel")
@Entity
@NamedNativeQuery(name = "fetchHotel",
query = "{ call usp_iconnect_dashboard_gethotels(:screenname) }",
resultSetMapping = "hotel-data",
hints = {@QueryHint(name = "org.hibernate.callable", value = "true") }
)
@SqlResultSetMapping(name = "hotel-data",
entities = @EntityResult(entityClass = Hotel.class))
@Cache(usage = CacheConcurrencyStrategy.READ_ONLY)
public class Hotel {
/**
* Unique hotel code.
*/
@Id
@Column(name = "hotelcode")
private String code;
/**
* Hotel name.
*/
@Column(name = "hotel")
private String name;
/**
* Indicates if user belongs to hotel.
* Y - if it is default hotel.
* N - if it is not default hotel.
*/
@Column(name = "is_default")
private String isDefault;
/**
* @return the code
*/
public final String getCode() {
return code;
}
/**
* @param code the code to set
*/
public final void setCode(final String code) {
this.code = code;
}
/**
* @return the name
*/
public final String getName() {
return name;
}
/**
* @param name the name to set
*/
public final void setName(final String name) {
this.name = name;
}
/**
* @return the isDefault
*/
public final String getIsDefault() {
return isDefault;
}
/**
* @param isDefault the isDefault to set
*/
public final void setIsDefault(final String isDefault) {
this.isDefault = isDefault;
}
}
它可以很好地获取结果。
但是，当启用二级缓存 (ehcache) 和查询缓存时。
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${dialect}</prop>
<prop key="hibernate.show_sql">${showSQL}</prop>
<prop key="format_sql">true</prop>
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.connection.release_mode">on_close</prop>
<prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
</props>
</property>
添加查询缓存可以正常工作。然而，经过几次通话，它给出的错误如下。
DEBUG StandardQueryCache - Checking cached query results in region: DailyExpire
DEBUG EhcacheGeneralDataRegion - key: sql: { call usp_iconnect_dashboard_gethotels(?) }; parameters: ; named parameters: {screenname=dhulipah}; transformer: org.hibernate.transform.CacheableResultTransformer@110f2
DEBUG StandardQueryCache - Checking query spaces are up-to-date: [Hotel]
DEBUG EhcacheGeneralDataRegion - key: Hotel
DEBUG EhcacheGeneralDataRegion - Element for key Hotel is null
DEBUG StandardQueryCache - Returning cached query results
Hibernate: select hotel0_.hotelcode as hotelcod1_1_0_, hotel0_.is_default as is2_1_0_, hotel0_.hotel as hotel3_1_0_ from Hotel hotel0_ where hotel0_.hotelcode=?
WARN SqlExceptionHelper - SQL Error: 208, SQLState: S0002
ERROR SqlExceptionHelper - Invalid object name 'Hotel'.
INFO DefaultLoadEventListener - HHH000327: Error performing load command : org.hibernate.exception.SQLGrammarException: Invalid object name 'Hotel'.
Jul 22, 2013 3:25:39 PM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
SEVERE: The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
org.hibernate.exception.SQLGrammarException: Invalid object name 'Hotel'.
与上面的日志一样，它试图在一段时间后作为 SELECT 查询而不是存储过程调用来获取。
知道为什么会这样吗？因此，查询缓存不能用于在休眠中缓存存储过程。有没有其他方法可以为存储过程结果使用缓存？
提前感谢您的帮助。