Question

因此，我们将GreenDao用作我们的ORM，就在昨天，我注意到新功能有些严重滞后。经过一番调查，我发现这不是我们的代码，而是greenDao生成的一些代码。

当我们调用someEntity.getContacts()时，需要10到15秒才能运行查询。一周前，相同的代码非常快。有谁知道为什么要花这么长时间以及我们可以做什么来解决它？我已经包含了下面的代码。

构建模型的代码（DaoGenerator.java）这是我们实际编写的代码。

/*
 * MyEntity Entity
 */
Entity lead = schema.addEntity("MyEntity");
myEntity.setSuperclass("MainSyncableEntity");
myEntity.implementsInterface("ClusterItem");
myEntity.implementsInterface("PointQuadTree.Item");
myEntity.implementsInterface("BaseEntityGetter");
myEntity.addIdProperty().autoincrement();
myEntity.setConstructors(false);

// Attributes
myEntity.addStringProperty("myEntityId").unique().index();
myEntity.addStringProperty("clientUniqueId").unique();
myEntity.addDateProperty("dateModified").notNull().index();
myEntity.addDateProperty("visibleCreated").notNull().index();
myEntity.addDateProperty("visibleModified").notNull().index();
myEntity.addStringProperty("notes").notNull();
myEntity.addStringProperty("businessName").notNull();
myEntity.addStringProperty("statusId").notNull();
myEntity.addStringProperty("ownerId").notNull();
/*
 * Contact Entity
 */
Entity contact = schema.addEntity("Contact");
contact.setSuperclass("MainSyncableEntity");
contact.implementsInterface("BaseEntityGetter");
contact.addIdProperty().autoincrement();
contact.setConstructors(false);

// Attributes
contact.addStringProperty("contactId").unique().index();
contact.addStringProperty("clientUniqueId").unique();
contact.addDateProperty("dateModified").notNull().index();
contact.addStringProperty("firstName").notNull();
contact.addStringProperty("lastName").notNull();
contact.addStringProperty("email").notNull();
contact.addStringProperty("phonePrimary").notNull();
contact.addStringProperty("phoneSecondary").notNull();
contact.addStringProperty("ssn").notNull();
contact.addStringProperty("dateOfBirth");
Property leadContactSortOrder = contact.addIntProperty("sortOrder").notNull().getProperty();

/*
* MyEntity Relationships
*/
myEntity.addToMany(contact, contactMyEntityId, "contacts").orderAsc(contactSortOrder);


  /*
 * Contact Relationships
 */
// Properties
Property contactLeadId = contact.addLongProperty("contactMyEntityId").notNull().index().getProperty();

// Relationships
contact.addToOne(myEntity, contactMyEntityId);

运行缓慢的Generated方法：

public List<LeadContact> getContacts() {
    long start = System.currentTimeMillis();
    if (contacts == null) {
        if (daoSession == null) {
            throw new DaoException("Entity is detached from DAO context");
        }
        LeadContactDao targetDao = daoSession.getLeadContactDao();
        List<LeadContact> contactsNew = targetDao._queryLead_Contacts(id);
        synchronized (this) {
            if (contacts == null) {
                contacts = contactsNew;
            }
        }
    }
    return contacts;
}

然后使用生成的代码进行查询：

/** Internal query to resolve the "contacts" to-many relationship of Lead. */
public List<LeadContact> _queryLead_Contacts(long leadContactLeadId) {
    synchronized (this) {
        if (lead_ContactsQuery == null) {
            QueryBuilder<LeadContact> queryBuilder = queryBuilder();
            queryBuilder.where(Properties.LeadContactLeadId.eq(null));
            queryBuilder.orderRaw("T.'SORT_ORDER' ASC");
            lead_ContactsQuery = queryBuilder.build();
        }
    }
    Query<LeadContact> query = lead_ContactsQuery.forCurrentThread();
    query.setParameter(0, leadContactLeadId);
    return query.list();
}

为什么greenDao查询需要15秒？

0 个答案: