使用JaVers记录地图更改

时间:2017-12-08 15:11:04

标签: java javers

是否可以使用JaVers记录Map中值的更改?

我想将所有更改(添加,更新和删除)记录到我的RecordStore对象中,以便我对已发生的事情进行审计跟踪。目前,我正在使用以下代码,并在每次更改后提交。

private Map<String, Record> records = new HashMap<>();
private Javers history = JaversBuilder.javers().build();

public RecordStore(){
    history.commit("user", records);
}

public void addRecord(Record a){
    records.put(a.getId(), a);
    history.commit("user", records);
}
public void removeRecord(Record a){
    records.remove(a.getId());
    history.commit("user", records);
}
public void updateRecord(Record a){
    records.put(a.getId(), a);
    history.commit("user", records);
}

public String printHistory(){
    List<Change> changes = history.findChanges(QueryBuilder.anyDomainObject().build());
    return history.processChangeList(changes, new SimpleTextChangeLog());
}

但是,JaVers(printHistory())生成的更改列表中只包含EntryAdded和EntryRemoved记录。更糟糕的是,它在整个日志中使用更改的值,而不是仅在更改后使用。我之前没有使用过JaVers,所以任何帮助它按照需要运行都会受到赞赏。使用RecordStore的测试类如下:

public static void main(String[] args){
    RecordStore store = new RecordStore();

    Record a1 = new Record();
    a1.setStart(0);
    a1.setEnd(5);
    a1.setValue("James");
    store.addRecord(a1);

    Record a2 = new Record();
    a2.setStart(10);
    a2.setEnd(15);
    a2.setValue("Jimmy");
    store.addRecord(a2);

    Record a3 = new Record();
    a3.setStart(20);
    a3.setEnd(25);
    a3.setValue("Jimbo");
    store.addRecord(a3);

    a2.setValue("JIMMY");
    store.updateRecord(a2);

    store.removeRecord(a1);

    System.out.println(store.printHistory());
}

1 个答案:

答案 0 :(得分:0)

通常,您逐个提交域对象,例如:

public void addRecord(Record a){
    records.put(a.getId(), a);
    history.commit("user", a);
}
public void removeRecord(Record a){
    records.remove(a.getId());
    history.commitShallowDelete("user", a);
}
public void updateRecord(Record a){
    records.put(a.getId(), a);
    history.commit("user", a); 
}

但是,Record应该映射为实体类型(使用@Id)。