java - Spring JPA 有时会跳过插入实体

Question

我有一个 springboot 应用程序，并且有一个自定义实现来记录 JPA 实体的更改历史记录。

我的主要实体是 Test，它从 Base 类扩展而来。基类有如下注解

@EntityListeners(HistoryEntityUpdater.class)
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "object_type")

我有一个自定义实体监听器，其方法用 @PostPersist 和 @PostUpdate 注释。在这些方法中，我创建了一个 TestHistory 实例并调用 entityManager.persist。虽然这有效，但一些历史记录没有被插入。这是调用保存时的日志，但数据库未更新。

2016-04-22 19:57:58.428 TRACE 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Releasing statement [sql : 'update managed_object set last_updated_time=?, name=?, workflow_status=? where id=?', parameters : ['2016-04-22 19:57:26.185','tests1','ERROR',1]]
2016-04-22 19:57:58.429 TRACE 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Closing prepared statement [sql : 'update managed_object set last_updated_time=?, name=?, workflow_status=? where id=?', parameters : ['2016-04-22 19:57:26.185','tests1','ERROR',1]]
2016-04-22 19:57:58.429 TRACE 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Starting after statement execution processing [ON_CLOSE]
2016-04-22 19:57:58.429 TRACE 18060 --- [nio-9285-exec-2] o.h.internal.util.SerializationHelper    : Starting clone through serialization
2016-04-22 19:57:58.429 TRACE 18060 --- [nio-9285-exec-2] o.h.internal.util.SerializationHelper    : Starting serialization of object [2016-04-22T14:27:26.185Z]
2016-04-22 19:57:58.429 TRACE 18060 --- [nio-9285-exec-2] o.h.internal.util.SerializationHelper    : Starting deserialization of object
2016-04-22 19:57:58.433 TRACE 18060 --- [nio-9285-exec-2] o.h.internal.util.SerializationHelper    : Attempting to locate class [java.time.Ser]
2016-04-22 19:57:58.434 DEBUG 18060 --- [nio-9285-exec-2] c.b.b.m.db.history.HistoryEntityUpdater  : postUpdate com.xyz.model.db.Test@4dcfc8b8
2016-04-22 19:57:58.435 TRACE 18060 --- [nio-9285-exec-2] o.hibernate.engine.spi.IdentifierValue   : ID unsaved-value strategy UNDEFINED
2016-04-22 19:57:58.436 TRACE 18060 --- [nio-9285-exec-2] o.h.e.i.AbstractSaveEventListener        : Transient instance of: com.xyz.model.db.history.TestHistory
2016-04-22 19:57:58.436 TRACE 18060 --- [nio-9285-exec-2] o.h.e.i.DefaultPersistEventListener      : Saving transient instance
2016-04-22 19:57:58.437 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.i.AbstractSaveEventListener        : Generated identifier: component[id,revisionTime,revisionType]{revisionType=UPDATED, id=1, revisionTime=Fri Apr 22 19:57:58 IST 2016}, using strategy: org.hibernate.id.CompositeNestedGeneratedValueGenerator
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] o.h.e.i.AbstractSaveEventListener        : Saving [com.xyz.model.db.history.TestHistory#component[id,revisionTime,revisionType]{revisionType=UPDATED, id=1, revisionTime=Fri Apr 22 19:57:58 IST 2016}]
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.engine.spi.ActionQueue     : Adding an EntityInsertAction for [com.xyz.model.db.history.TestHistory] object
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.engine.spi.ActionQueue     : Adding insert with no non-nullable, transient entities: [EntityInsertAction[com.xyz.model.db.history.TestHistory#com.xyz.model.db.history.HistoryObject$HistoryId@4b74eea0]]
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.engine.spi.ActionQueue     : Adding resolved non-early insert action.
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] o.h.a.i.UnresolvedEntityInsertActions    : No unresolved entity inserts that depended on [[com.xyz.db.history.TestHistory#com.xyz.db.history.HistoryObject$HistoryId@4b74eea0]]
2016-04-22 19:57:58.437 TRACE 18060 --- [nio-9285-exec-2] o.h.a.i.UnresolvedEntityInsertActions    : No entity insert actions have non-nullable, transient entity dependencies.
2016-04-22 19:57:58.438 TRACE 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Starting after statement execution processing [ON_CLOSE]
2016-04-22 19:57:58.438 TRACE 18060 --- [nio-9285-exec-2] o.h.e.i.AbstractFlushingEventListener    : Post flush
2016-04-22 19:57:58.438 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.internal.SessionImpl       : before transaction completion
2016-04-22 19:57:58.440 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.t.internal.jdbc.JdbcTransaction    : committed JDBC Connection
2016-04-22 19:57:58.440 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.t.internal.jdbc.JdbcTransaction    : re-enabling autocommit
2016-04-22 19:57:58.441 TRACE 18060 --- [nio-9285-exec-2] o.h.e.t.i.TransactionCoordinatorImpl     : after transaction completion
2016-04-22 19:57:58.442 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.internal.SessionImpl       : after transaction completion
2016-04-22 19:57:58.443 TRACE 18060 --- [nio-9285-exec-2] org.hibernate.internal.SessionImpl       : Closing session
2016-04-22 19:57:58.443 TRACE 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@5be5a598]
2016-04-22 19:57:58.443 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : HHH000420: Closing un-released batch
2016-04-22 19:57:58.443 TRACE 18060 --- [nio-9285-exec-2] o.h.e.j.internal.LogicalConnectionImpl   : Closing logical connection
2016-04-22 19:57:58.443 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.j.internal.LogicalConnectionImpl   : Releasing JDBC connection
2016-04-22 19:57:58.443 DEBUG 18060 --- [nio-9285-exec-2] o.h.e.j.internal.LogicalConnectionImpl   : Released JDBC connection
2016-04-22 19:57:58.443 TRACE 18060 --- [nio-9285-exec-2] o.h.e.j.internal.LogicalConnectionImpl   : Logical connection closed

HistoryEntityUpdater 上的 postUpdate 和 postPersist 方法使用 @Transactional 进行注释

Answer 1

JPA 规范规定 EntityListener 不应使用 EntityManager。这使得它们对于大多数用例(包括您的用例)毫无用处。

我也不知道这一点。

从您的堆栈跟踪看来，JDBC 事务已提交并且实体管理器已刷新。所以至少当你的监听器运行时你没有任何事务。这可能会导致写入的历史实体未写入数据库的情况。EntityListener 由 hibernate 调用，而不是由 spring 调用，因此监听器上的任何 @Transactional 注释都不起作用。

终于有一个解决方案适合你，使用'Envers'来实现实体审计:

database auditing jpa