Spring Data JPA事务支持
标签：end 而在 iter action 源码 sim readonly serial 方法
一 点睛
Spring Data JPA对所有默认方法都开启了事务支持，且查询类事务默认启用readOnly=true属性。
二 SimpleJpaRepository缩减版源码
@Repository
@Transactional(readOnly = true)
public class SimpleJpaRepositoryextends Serializable> implements JpaRepository,
JpaSpecificationExecutor {
......
@Transactional
public void delete(ID id) {
......
}
@Transactional
public void delete(T entity) {
......
}
@Transactional
public void delete(Iterable extends T> entities) {
......
}
@Transactional
public void deleteInBatch(Iterable entities) {
......
}
@Transactional
public void deleteAll() {
......
}
@Transactional
public void deleteAllInBatch() {
......
}
public T findOne(ID id) {
......
}
protected Map getQueryHints() {
......
}
private JpaEntityGraph getEntityGraph() {
......
}
@Override
public T getOne(ID id) {
......
}
public boolean exists(ID id) {
......
}
public List findAll() {
......
}
public List findAll(Iterable ids) {
......
}
public List findAll(Sort sort) {
......
}
public Page findAll(Pageable pageable) {
......
}
public T findOne(Specification spec) {
......
}
public List findAll(Specification spec) {
......
}
public Page findAll(Specification spec, Pageable pageable) {
......
}
public List findAll(Specification spec, Sort sort) {
......
}
public long count() {
......
}
public long count(Specification spec) {
......
}
@Transactional
public extends T> S save(S entity) {
......
}
@Transactional
public extends T> S saveAndFlush(S entity) {
......
}
@Transactional
public extends T> List save(Iterable entities) {
......
}
......
}
三 源码分析
从源码分析可以看出，SimpleJpaRepository在类级别定义了@Transactional(readOnly = true)，而在和save、delete相关的操作重写了@Transactional属性，此时readOnly属性是false，其余查询操作readOnly仍然为true。
Spring Data JPA事务支持
标签：end 而在 iter action 源码 sim readonly serial 方法
原文地址：https://www.cnblogs.com/zouhong/p/13289130.html
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