对于每个保存(更新)Hibernate Envers创建修订版在表中是否更改

Question

在我的客户端服务器应用程序中，我使用javafx作为客户端，Java Hibernate作为服务器连接。

问题

我有一个保存按钮，对于每次单击按钮，Envers会创建一个修订版，是否在表值没有更改。基本上，它没有将旧数据检查到新数据，而只是创建修订。

这是我的豆代码

@Entity
@Audited
@Table(name = "DOMAIN")
public class Domain implements java.io.Serializable {
private Long domainId;
private String domainName;
private String dataType;
private Long valueSize;
private Long valuePrecision;
private Long valueScale;
private String valueRangeLow;
private String valueRangeHigh;
private String description;
private String comments;
private Date effectiveStartDate;
private Date effectiveEndDate;
private String status;
public Domain() {
}
public Domain(Long domainId, String domainName, String dataType,
        Date effectiveStartDate, Date effectiveEndDate, String status) {
    this.domainId = domainId;
    this.domainName = domainName;
    this.dataType = dataType;
    this.effectiveStartDate = effectiveStartDate;
    this.effectiveEndDate = effectiveEndDate;
    this.status = status;
}
public Domain(Long domainId, String domainName, String dataType,
        Long valueSize, Long valuePrecision,
        Long valueScale, String valueRangeLow, String valueRangeHigh,
        String description, String comments, Date effectiveStartDate,
        Date effectiveEndDate, String status) {
    this.domainId = domainId;
    this.domainName = domainName;
    this.dataType = dataType;
    this.valueSize = valueSize;
    this.valuePrecision = valuePrecision;
    this.valueScale = valueScale;
    this.valueRangeLow = valueRangeLow;
    this.valueRangeHigh = valueRangeHigh;
    this.description = description;
    this.comments = comments;
    this.effectiveStartDate = effectiveStartDate;
    this.effectiveEndDate = effectiveEndDate;
    this.status = status;
}
@Id
@GeneratedValue(generator = "DOMAIN_SEQ")
@SequenceGenerator(name="DOMAIN_SEQ", sequenceName="DOMAIN_SEQ",allocationSize=1)
@Column(name = "DOMAIN_ID", unique = true, nullable = false, precision = 22, scale = 0)
public Long getDomainId() {
    return this.domainId;
}
public void setDomainId(Long domainId) {
    this.domainId = domainId;
}
@Column(name = "DOMAIN_NAME", nullable = false, length = 50)
public String getDomainName() {
    return this.domainName;
}
public void setDomainName(String domainName) {
    this.domainName = domainName;
}
@Column(name = "DATA_TYPE", nullable = false, length = 50)
public String getDataType() {
    return this.dataType;
}
public void setDataType(String dataType) {
    this.dataType = dataType;
}
@Column(name = "VALUE_SIZE", precision = 22, scale = 0)
public Long getValueSize() {
    return this.valueSize;
}
public void setValueSize(Long valueSize) {
    this.valueSize = valueSize;
}
@Column(name = "VALUE_PRECISION", precision = 22, scale = 0)
public Long getValuePrecision() {
    return this.valuePrecision;
}
public void setValuePrecision(Long valuePrecision) {
    this.valuePrecision = valuePrecision;
}
@Column(name = "VALUE_SCALE", precision = 22, scale = 0)
public Long getValueScale() {
    return this.valueScale;
}
public void setValueScale(Long valueScale) {
    this.valueScale = valueScale;
}
@Column(name = "VALUE_RANGE_LOW", length = 50)
public String getValueRangeLow() {
    return this.valueRangeLow;
}
public void setValueRangeLow(String valueRangeLow) {
    this.valueRangeLow = valueRangeLow;
}
@Column(name = "VALUE_RANGE_HIGH", length = 50)
public String getValueRangeHigh() {
    return this.valueRangeHigh;
}
public void setValueRangeHigh(String valueRangeHigh) {
    this.valueRangeHigh = valueRangeHigh;
}
@Column(name = "DESCRIPTION", length = 200)
public String getDescription() {
    return this.description;
}
public void setDescription(String description) {
    this.description = description;
}
@Column(name = "COMMENTS")
public String getComments() {
    return this.comments;
}
public void setComments(String comments) {
    this.comments = comments;
}
@Temporal(TemporalType.DATE)
@Column(name = "EFFECTIVE_START_DATE", nullable = false, length = 7)
public Date getEffectiveStartDate() {
    return this.effectiveStartDate;
}
public void setEffectiveStartDate(Date effectiveStartDate) {
    this.effectiveStartDate = effectiveStartDate;
}
@Temporal(TemporalType.DATE)
@Column(name = "EFFECTIVE_END_DATE", nullable = false, length = 7)
public Date getEffectiveEndDate() {
    return this.effectiveEndDate;
}
public void setEffectiveEndDate(Date effectiveEndDate) {
    this.effectiveEndDate = effectiveEndDate;
}
@Column(name = "STATUS", nullable = false, length = 50)
public String getStatus() {
    return this.status;
}
public void setStatus(String status) {
    this.status = status;
}

问题仅在客户端服务器应用程序中。

使用普通独立程序，它可以正常工作。

有人可以帮我吗？我一直坚持这一点。我是否想念任何罐子或其他任何东西？如果您需要更多关于问题的澄清，请告诉我。

服务器端代码

public long saveDomainFromJson(String domainJsonData) throws Exception {
    long domainId = 0;
    try {
        // here I am setting data to bean, getting from client side
        Domain domain = getDomainFromJson(domainJsonData);           
        Session session = HibernateUtil.currentSession();
        Transaction tx = session.beginTransaction();
        domainId  = session.saveOrUpdate(domain);
        tx.commit();
        HibernateUtil.closeSession();
    } catch (Exception e) {
        e.printStackTrace();
        throw e;
    }
    return domainId;
}

JSON DATA

{  " domain_id"：36，  " domain_name"：" test_type"，  " domain_data_type"："字符串"，  " domain_eff_start_date"：" 2016-11-08"，  " domain_eff_end_date"：" 2099-12-31"，  " domain_status"："草稿"，  " domain_description"："对象类型：添加以进行测试目的"}

Answer 1

对不起，我没有很快看到这个，但是问题是您对session#save的呼吁。在此处的Session的Javadocs中，您会注意到以下段落：

save（）和persist（）在sql delete和update（）或sql update中的sql delete（）中导致sql insert，delete（）。在冲洗时间检测到持续实例的更改，也导致SQL更新。saveorupdate（）和replicate（）在插入或更新中结果。

因此，您基本上想使用session#saveOrUpdate，以便根据实体状态获得插入和更新语义。

由于session#save正在生成新的INSERT操作，因此Envers将始终为该情况创建新的修订。