Question

我有一个事务方法相互调用，但似乎事务提交应该提交的地点或至少在此之后出现插入日志。这是呼叫层次结构：

@Override
@Transactional
public DataProcessingStatistics copyInitialRevision() {
    try {
        DataProcessingStatistics statistics = new DataProcessingStatistics();
        transaction(statistics);
        statistics.printResult();
        return statistics;
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    }
}

@Override
@Transactional(propagation = Propagation.REQUIRES_NEW)  
public void transaction(DataProcessingStatistics statistics) {
    entityAuditTableService.generateTables(statistics);
    oneToManyRelationAuditTableService.generateTables(statistics);
    manyToManyRelationAuditTableService.generateTables(statistics);
}

...

 @Service
 public class EntityAuditTableServiceImpl implements EntityAuditTableService {
...

@Override
public void generateTables(DataProcessingStatistics statistics) {
    List<EntityAuditTable> auditTables = loadAll();
    for (EntityAuditTable auditTable : auditTables) {
        try {
            statistics.addAsProcessed(auditTable, process(auditTable));
        } catch (Exception e) {
            statistics.addAsSkipped(auditTable.getAuditTable(), e);             
        }
    }
}

@Transactional(propagation = Propagation.REQUIRES_NEW)
public int process(EntityAuditTable auditTable) {
    EntityDataTable table = entityDataTableService.create(auditTable.getEntityDataTable().getEntityClass());
    List<EntityDataTableRow> rows = entityDataTableService.readAllData(table);
    List<EntityAuditTableRow> auditTableRows = entityAuditTableRowService.generateTableData(auditTable, rows);
    entityAuditTableRowService.saveAll(auditTableRows);
    return auditTableRows.size();
}

...


 @Service
 public class EntityAuditTableRowServiceImpl implements EntityAuditTableRowService {

...


@Override
@Transactional
public void saveAll(List<EntityAuditTableRow> auditTableRows) {
    jdbcService.saveArraysAs500RowChunks(auditTableRows, new ListSaver<EntityAuditTableRow>(){
        @Override
        public void save(List<EntityAuditTableRow> list) {
            EntityAuditTableRowServiceImpl.this.saveJdbc(list);
            for (EntityAuditTableRow auditTableRow: list) {
                entityChangeService.saveFromRow(auditTableRow);
            }
        }
    });
}

...


@Service
public class JdbcServiceImpl implements JdbcService {

@Override
public <E> void saveArraysAs500RowChunks(List<E> rows, ListSaver<E> saver) {
    for (int i = 0; i < rows.size(); i += 500) {
        save500(rows.subList(i, Math.min(i +500, rows.size())), saver);
    }
}

@Override
@Transactional(propagation=Propagation.REQUIRES_NEW)
public <E> void save500(final List<E> rows, ListSaver<E> saver) {
    if (rows == null || rows.size() == 0) {
        return;
    }
    if (rows.size() > 500) {
        throw new IllegalStateException("(auditTableRows.size() > 500)");
    }
    saver.save(rows);
}   

...

@Service
public class EntityChangeServiceImpl implements EntityChangeService {


@Override
@Transactional
public void saveFromRow(EntityAuditTableRow auditTableRow) {
    Revision revision = revisionsService.load(auditTableRow.getAuditTableRow().getRevision().getId());
    EntityChange entityChange = create(auditTableRow);
    save(entityChange);
    revision.getEntitiesChanges().add(entityChange);
    revisionsService.save(revision);
}

...
@Service
public class RevisionServiceImpl implements RevisionService {

@Override
@Transactional(propagation = Propagation.REQUIRES_NEW)
public Revision create() {
    Revision revisionEntity = createDetached();
    long generateNextIdForClass = idService.generateNextIdForClass(Revision.class);
    revisionEntity.setId(generateNextIdForClass);
    revisionEntity.setTimestamp(new Date());
    save(revisionEntity);
    return revisionEntity;
}

@Override
@Transactional
public void save(Revision revisionEntity) {
    persistenceManagerHibernate.save(revisionEntity);
}

事情是只有在从root / initial方法调用返回后才会收到ENTITY_CHANGED_IN_REVISION表/ EntityChange实体的日志中的插入：

这一点：

@Override
@Transactional
public DataProcessingStatistics copyInitialRevision() {
    try {
        DataProcessingStatistics statistics = new DataProcessingStatistics();
        transaction(statistics);
        statistics.printResult();
        return statistics; // only after that return insert log appear
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException(e);
    }
}

此日志仅在返回后显示：

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

Hibernate: insert into ENTITY_CHANGED_IN_REVISION (ENTITY_ID, ENTITY_NAME, GROUP_ENTITY_ID, GROUP_NAME, REV_ID, REVISION_TYPE, ID) values (?, ?, ?, ?, ?, ?, ?)

从“保存500行块”方法返回后，而不是从@Transactional（propagation = Propagation.REQUIRES_NEW）返回后获取它们：

@Override
@Transactional(propagation=Propagation.REQUIRES_NEW)
public <E> void save500(final List<E> rows, ListSaver<E> saver) {
    if (rows == null || rows.size() == 0) {
        return;
    }
    if (rows.size() > 500) {
        throw new IllegalStateException("(auditTableRows.size() > 500)");
    }
    saver.save(rows); // invokes EntityChangeServiceImpl.saveFromRow
}   

...

@Service
public class EntityChangeServiceImpl implements EntityChangeService {


@Override
@Transactional
public void saveFromRow(EntityAuditTableRow auditTableRow) {
    Revision revision = revisionsService.load(auditTableRow.getAuditTableRow().getRevision().getId());
    EntityChange entityChange = create(auditTableRow);
    save(entityChange);
    revision.getEntitiesChanges().add(entityChange);
    revisionsService.save(revision);
}

Answer 1

类的事务方法在没有代理的情况下调用此类的其他事务方法，因此第二个方法事务不在invokation中使用。

Answer 2

要应用@Transactional并将其打开，必须通过proxy执行。

Spring Propagation.REQUIRES_NEW @Transaction commit仅在outter事务结束后出现在日志中

2 个答案: