使用拦截器在休眠状态下使用新值和旧值进行审计跟踪

Question

我可以轻松地记录上次修改日期、修改者等。但是，我也需要记录旧值和新值。在拦截器中，我可以在 postflush 开始执行之前触发一个 select 以获取当前记录的值。然后我可以在该记录和新记录之间进行比较，以查看发生了什么变化，并将该信息记录为旧值和新值。有更好的办法吗？

问题是我要修改的对象可能非常巨大，并且还引用其他对象。进行 diff 可能会很昂贵。

-谢谢

Answer 1

重写 EmptyInterceptor(IInterceptor) 的 onFlushDirty 为您提供数组 previousState 和 currentState。您可以使用这两个数组来查找旧值和新值。

查看此示例

Answer 2

为什么不使用审计表和触发器？

Answer 3

您可以尝试 Envers ，它现在是 Hibernate 的一部分： http://www.jboss.org/envers

Answer 4

我以这种方式审核，但日期很难看：

persistence.xml: property name="hibernate.ejb.interceptor" value="siapen.jpa.interceptor.MeuInterceptador" />

    package siapen.jpa.interceptor;

import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;

import org.apache.commons.lang3.ObjectUtils;
import org.hibernate.CallbackException;
import org.hibernate.EmptyInterceptor;
import org.hibernate.type.Type;

import siapen.model.BaseEntity;

public class MeuInterceptador extends EmptyInterceptor {

    private static final long serialVersionUID = 7853236444153436270L;

    private String strSQL = "";
    String acao;
    @SuppressWarnings("rawtypes")
    BaseEntity entity;
    String s = "";

    @SuppressWarnings("unchecked")
    // 1
    public boolean onSave(Object obj, Serializable id, Object[] valores, String[] propertyNames, Type[] types)
            throws CallbackException {
        if (obj instanceof BaseEntity) {
            entity = (BaseEntity) obj;
            for (int i = 0; i < valores.length; i++) {
                if (valores[i] != null && !valores[i].equals("")) {
                    s += propertyNames[i] + ":" + valores[i];
                    if (i != valores.length - 1) {
                        s += "___";
                    }
                }
            }
        }
        return false;
    }

    @SuppressWarnings("unchecked")
    // 1
    public boolean onFlushDirty(Object obj, Serializable id, Object[] valoresAtuais, Object[] valoresAnteriores,
            String[] propertyNames, Type[] types) throws CallbackException {
        if (obj instanceof BaseEntity) {
            entity = (BaseEntity) obj;

            for (int i = 0; i < valoresAtuais.length; i++) {

                if (!ObjectUtils.equals(valoresAtuais[i], valoresAnteriores[i])) {
                    if (!s.equals("")) {
                        s += "___";
                    }
                    s += propertyNames[i] + "-Anterior:" + valoresAnteriores[i] + ">>>Novo:" + valoresAtuais[i];
                }
            }
        }
        return false;

    }

    @SuppressWarnings("unchecked")
    // 1
    public void onDelete(Object obj, Serializable id, Object[] state, String[] propertyNames, Type[] types) {
        if (obj instanceof BaseEntity) {
            entity = (BaseEntity) obj;
        }
    }

    // CHAMADO ANTES DO COMMIT
    // 2
    @SuppressWarnings("rawtypes")
    public void preFlush(Iterator iterator) {
    }

    // 3
    public String onPrepareStatement(String sql) {
        acao = "";
        if (sql.startsWith("/* update")) {
            acao = "update";
        } else if (sql.startsWith("/* insert")) {
            acao = "insert";
        } else if (sql.startsWith("/* delete")) {
            acao = "delete";
        }
        if (acao != null) {
            strSQL = sql;
        }
        return sql;
    }

    // CHAMADO APÓS O COMMIT
    // 4
    @SuppressWarnings("rawtypes")
    public void postFlush(Iterator iterator) {
        if (acao != null) {
            try {
                if (acao.equals("insert")) {
                    AuditLogUtil audi = new AuditLogUtil();
                    audi.LogIt("Salvo", entity, s);
                }
                if (acao.equals("update")) {
                    AuditLogUtil audi = new AuditLogUtil();
                    audi.LogIt("Atualizado", entity, s);
                }
                if (acao.equals("delete")) {
                    AuditLogUtil audi = new AuditLogUtil();
                    audi.LogIt("Deletado", entity, "");
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                strSQL = "";
                s = "";
            }
        }
    }

}

Answer 5

对于那些使用 Envers 的人来说，这可以使用自定义 Envers 侦听器轻松实现。而且它可能会是一个更干净的解决方案。

1. 实现自定义 evnvers 集成器并注册您的侦听器（查看 envers docs )
2. 实现您的更新/插入侦听器

---

public class UpdateEnversListener extends EnversPostUpdateEventListenerImpl {

    private static Logger log = LoggerFactory.getLogger(UpdateEnversListener.class);
    public UpdateEnversListener(EnversService enversService) {

        super(enversService);

    }
    @Override

    public void onPostUpdate(PostUpdateEvent event) {
        List<String> auditedProperties = Arrays.asList(event.getPersister().getPropertyNames());

            List<Integer> dirtyFieldsIndices = Ints.asList(event.getDirtyProperties());
        // In the event you have a object

        // In the persister you have indices of fields that changed and also their values

        // Do your magic