领域花费的时间太长，无法将对象复制到RealmObject [英] Realm taking too long to copy objects to RealmObject

问题描述

我正在使用领域将产品列表存储在我的Andorid应用程序中. 因此，我收到一个包含约3k个对象的产品列表. 而且我正在尝试像这样存储它们:

I'm using realm to store a list of Products in my Andorid App. So, I receive a produtc's list with about 3k objects. And I'm trying to store them like this:

@Override
public void saveAll(List<ProductsDomain> domainProducts) throws InstantiationException, IllegalAccessException {
    Realm instance = getRealmInstance();

    RealmList<ProdutcsRealm> realmProducts = new RealmList<ProdutcsRealm>();
    try {
        ProdutcsRealm realmProduct = getClasseEntidadePersistencia().newInstance();
        for (ProductsDomain domainProduct : domainProducts) {
            fromDomainToPersistence(domainProduct, realmProduct);
            realmProducts.add(realmProduct);
        }
        instance.beginTransaction();
        instance.copyToRealm(realmProducts);// taking to long, 3k items
        instance.commitTransaction();

    } catch (Exception e) {
        e.printStackTrace();
        instance.cancelTransaction();
        return;
    }


}

因此，该领域花费了太多时间，例如20分钟.任何人都有提高性能的想法吗?

So, the realm is taking too much time, something like 20 minutes. Anybody have any idea to get better performace?

已解决: 我发现了问题！我在所有迭代中都使用相同的ProductsRealm实例.尝试将多个引用的列表保存到同一对象时，似乎Realm不能很好地工作.

Solved: I've found the problem! I was using the same ProductsRealm instance for all iteration. Looks like that Realm dont work well when you try to save a list of multiple references to de same object.

推荐答案

如果可以在fromDomainToPersistence()中将对象添加到Realm中，则会更快. saveAll()方法可能类似于:

It will be faster if you can add the objects to your Realm in fromDomainToPersistence(). The saveAll() method could be something like:

public void saveAll(...) {
    Realm instance = getRealmInstance();
    try {
        instance.beginTransaction();
        for (ProductsDomain domainProduct : domainProducts) {
            fromDomainToPersistence(instance, domainProduct);
        }
        instance.commitTransaction();
    } catch (Exception e) {
        // ...
    }
}

和

public void fromDomainToPersistence(Realm r, DomainProduct domainProduct) {
     ProductRealm realmProduct = r.createObject(ProductRealm.class);
     // set the fields' values
}

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