Batch Fetching stops working when I enable bytecode enhancement.
I'm using hibernate-enhance-maven-plugin for build time enhancement.
I used reflection at the Test case, is there a better way to validate this issue?
{code:java}
@Entity
public class Team {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@OneToMany(mappedBy="team")
private List<Member> members;
{code}
{code:java}
@Entity
public class Member {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String name;
@ManyToOne
@JoinColumn(name="team_id")
private Team team;
{code}
persistence.xml
{code:xml}
<property name="hibernate.batch_fetch_style" value="DYNAMIC" />
<property name="hibernate.default_batch_fetch_size" value="100" />
{code}
{panel:title=Bytecode Enabled, n+1 problem loading members}
Hibernate:
/*
from
Team */ select
team0_.id as id1_1_
from
Team team0_
Hibernate:
/* load one-to-many com.test.entities.Team.members */ select
members0_.team_id as team_id3_0_1_,
members0_.id as id1_0_1_,
members0_.id as id1_0_0_,
members0_.name as name2_0_0_,
members0_.team_id as team_id3_0_0_
from
Member members0_
where
members0_.team_id=?
(repeats for each team)
{panel}
{panel:title=Bytecode Disabled, Batch Fetching working properly}
Hibernate:
/*
from
Team */ select
team0_.id as id1_1_
from
Team team0_
Hibernate:
/* load one-to-many com.test.entities.Team.members */ select
members0_.team_id as team_id3_0_1_,
members0_.id as id1_0_1_,
members0_.id as id1_0_0_,
members0_.name as name2_0_0_,
members0_.team_id as team_id3_0_0_
from
Member members0_
where
members0_.team_id in (
?,?,?,?,?,?,?,?,?,?
)
{panel} |
|