如何配置 Hibernate Envers 以避免实体修订查询中的某些集合(连接表)
How to configure Hibernate Envers to avoid certain collections (join tables) in entity revision queries
我正在使用 Hibernate Envers 4.2
,我想从实体中的某些集合中获取仅包含详细信息的实体的修订版。
但我可以看到针对实体中的所有集合触发的休眠查询导致性能问题。
也无法对集合使用 @NotAudited
注释以避免在此特定查询中出现,因为在其他情况下需要对这些集合进行审核。
例如,如果我的审计实体将这两个连接作为集合。
但是我希望获取实体修订的查询只获取地址信息而忽略订单信息,这可能吗?我不想用@NotAudited 注释订单信息,因为在其他情况下可能需要历史信息。
@ManyToOne
@JoinColumn(name="ADDR_ID")
public Address getAddress() { return address; }
@OneToMany
@JoinColumn(name="CUST_ID")
public Set<Order> getOrders() {return orders;}
与 this Hibernate documentation example 一样,如果我有一个 Customer
与 Address
关联:
@Audited( withModifiedFlag = true )
@Entity(name = "Customer")
public class Customer {
...
@ManyToOne(fetch = FetchType.LAZY)
private Address address;
}
我使用 this query:
查询修订
List<Customer> customers = AuditReaderFactory
.get( entityManager )
.createQuery()
.forRevisionsOfEntity( Customer.class, false, true )
.add( AuditEntity.id().eq( 1L ) )
.add( AuditEntity.property( "lastName" ).hasChanged() )
.getResultList();
仅启用 Customers
的查询,而不启用 Address
:
select
c.id as id1_3_0_,
c.REV as REV2_3_0_,
defaultrev1_.REV as REV1_4_1_,
c.REVTYPE as REVTYPE3_3_0_,
c.REVEND as REVEND4_3_0_,
c.created_on as created_5_3_0_,
c.createdOn_MOD as createdO6_3_0_,
c.firstName as firstNam7_3_0_,
c.firstName_MOD as firstNam8_3_0_,
c.lastName as lastName9_3_0_,
c.lastName_MOD as lastNam10_3_0_,
c.address_id as address11_3_0_,
c.address_MOD as address12_3_0_,
defaultrev1_.REVTSTMP as REVTSTMP2_4_1_
from
Customer_AUD c cross
join
REVINFO defaultrev1_
where
c.id = ?
and c.lastName_MOD = ?
and c.REV=defaultrev1_.REV
order by
c.REV asc
-- binding parameter [1] as [BIGINT] - [1]
-- binding parameter [2] as [BOOLEAN] - [true]
除非您像这样浏览关联:
AuditQuery innerJoinAuditQuery = AuditReaderFactory
.get( entityManager )
.createQuery()
.forEntitiesAtRevision( Customer.class, 1 )
.traverseRelation( "address", JoinType.INNER );
Hibernate Envers 不应将它们包含在 SQL 修订查询中。
我正在使用 Hibernate Envers 4.2
,我想从实体中的某些集合中获取仅包含详细信息的实体的修订版。
但我可以看到针对实体中的所有集合触发的休眠查询导致性能问题。
也无法对集合使用 @NotAudited
注释以避免在此特定查询中出现,因为在其他情况下需要对这些集合进行审核。
例如,如果我的审计实体将这两个连接作为集合。 但是我希望获取实体修订的查询只获取地址信息而忽略订单信息,这可能吗?我不想用@NotAudited 注释订单信息,因为在其他情况下可能需要历史信息。
@ManyToOne
@JoinColumn(name="ADDR_ID")
public Address getAddress() { return address; }
@OneToMany
@JoinColumn(name="CUST_ID")
public Set<Order> getOrders() {return orders;}
与 this Hibernate documentation example 一样,如果我有一个 Customer
与 Address
关联:
@Audited( withModifiedFlag = true )
@Entity(name = "Customer")
public class Customer {
...
@ManyToOne(fetch = FetchType.LAZY)
private Address address;
}
我使用 this query:
查询修订List<Customer> customers = AuditReaderFactory
.get( entityManager )
.createQuery()
.forRevisionsOfEntity( Customer.class, false, true )
.add( AuditEntity.id().eq( 1L ) )
.add( AuditEntity.property( "lastName" ).hasChanged() )
.getResultList();
仅启用 Customers
的查询,而不启用 Address
:
select
c.id as id1_3_0_,
c.REV as REV2_3_0_,
defaultrev1_.REV as REV1_4_1_,
c.REVTYPE as REVTYPE3_3_0_,
c.REVEND as REVEND4_3_0_,
c.created_on as created_5_3_0_,
c.createdOn_MOD as createdO6_3_0_,
c.firstName as firstNam7_3_0_,
c.firstName_MOD as firstNam8_3_0_,
c.lastName as lastName9_3_0_,
c.lastName_MOD as lastNam10_3_0_,
c.address_id as address11_3_0_,
c.address_MOD as address12_3_0_,
defaultrev1_.REVTSTMP as REVTSTMP2_4_1_
from
Customer_AUD c cross
join
REVINFO defaultrev1_
where
c.id = ?
and c.lastName_MOD = ?
and c.REV=defaultrev1_.REV
order by
c.REV asc
-- binding parameter [1] as [BIGINT] - [1]
-- binding parameter [2] as [BOOLEAN] - [true]
除非您像这样浏览关联:
AuditQuery innerJoinAuditQuery = AuditReaderFactory
.get( entityManager )
.createQuery()
.forEntitiesAtRevision( Customer.class, 1 )
.traverseRelation( "address", JoinType.INNER );
Hibernate Envers 不应将它们包含在 SQL 修订查询中。