如何使用hibernate envers审计日志获取JIRA之类的更改历史记录？

Question

我试图在UI上向JIRA展示改变历史。我正在使用Spring Data JPA，我已经使用Envers（v5.3.7）配置了审计跟踪。我可以使用AuditQuery获取所有修订的列表，用于特定实体的主键值。

是否有一种简单的方法来计算修订版的“delta”并识别已更改的属性？ （有新旧价值）

我已将@Audited(withModifiedFlag = true)注释添加到我的实体类中。它在<entity>_aud表中为每个属性添加了一个列，指示属性是否已更改。我想弄清楚，如何利用这些额外的列。

Answer 1

如果您需要像JIRA这样的东西，您必须自己构建它。

我建议您使用Hibernate拦截器：

http://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#events

正如您在以下示例中所看到的，您将获得当前和之前的状态，然后可以创建增量并将其存储在您自己的更改日志表中：

public static class LoggingInterceptor extends EmptyInterceptor {
    @Override
    public boolean onFlushDirty(
        Object entity,
        Serializable id,
        Object[] currentState,
        Object[] previousState,
        String[] propertyNames,
        Type[] types) {
            LOGGER.debugv( "Entity {0}#{1} changed from {2} to {3}",
                entity.getClass().getSimpleName(),
                id,
                Arrays.toString( previousState ),
                Arrays.toString( currentState )
            );
            return super.onFlushDirty( entity, id, currentState,
                previousState, propertyNames, types
        );
    }
}

Answer 2

这是我的代码

import javax.annotation.PostConstruct;
import javax.persistence.EntityManagerFactory;

import org.hibernate.event.service.spi.EventListenerRegistry;
import org.hibernate.event.spi.EventType;
import org.hibernate.event.spi.PreUpdateEvent;
import org.hibernate.event.spi.PreUpdateEventListener;
import org.hibernate.internal.SessionFactoryImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class AuditListener implements PreUpdateEventListener {   
    @Autowired
    private EntityManagerFactory entityManagerFactory;

    @PostConstruct
    private void init() {
        SessionFactoryImpl sessionFactory = entityManagerFactory.unwrap(SessionFactoryImpl.class);
        EventListenerRegistry registry = sessionFactory.getServiceRegistry().getService(EventListenerRegistry.class);

        // You can also add listener for a specific entity-type instead of event-group
        // In my case I needed global event listener
        registry.getEventListenerGroup(EventType.PRE_UPDATE).appendListener(this);
    }

    @Override
    public boolean onPreUpdate(PreUpdateEvent event) {
        String[] propertyNames = event.getPersister().getPropertyNames();
        Object[] oldValues = event.getOldState();
        Object[] newValues = event.getState();
        for (int index = 0; index < propertyNames.length; index++) {
            String propertyName = propertyNames[index];
            Object oldValue = oldValues[index];
            Object newValue = newValues[index];

            // This is just sample code
            boolean changed = oldValue != newValue;
            if (changed) {
                System.out.println("Audit log -> Property: " + propertyName + ", Old value: " + oldValue + ", New value: " + newValue);

                // Actual code that persists audit log
                ...
                ...
            }
        }
        return false;
    }
}