public void Run()
{
using (AliRecommend2DataEntities db = new AliRecommend2DataEntities())
{
((IObjectContextAdapter)db).ObjectContext.CommandTimeout = 600;
long startTime = DateTime.Now.Ticks;
var data = db.T_UserAction.Where(d => d.actiondate >= StartDate && d.actiondate < PredictDate).ToList();
Console.WriteLine("数据库数据读取完毕，正在进行处理中...");
FeatureCollection features = new FeatureCollection();
features.UpdateOnlineItemSet(db);
Console.WriteLine("正在读取正例数据...");
features.UpdatePositiveSet(db, PredictDate);
var categories = data.GroupBy(d => d.category);
Console.WriteLine("正在添加类别特征...");
foreach (var categoryData in categories)
{
CategoryFeature categoryFeature = new CategoryFeature(categoryData.Key, PredictDate);
categoryFeature.Update(categoryData);
features.AddCategoryFeature(categoryFeature);
}
var items = data.GroupBy(d => d.itemid);
Console.WriteLine("正在添加商品特征...");
//按商品分组，itemData是每个商品的所有记录
foreach (var itemData in items)
{
ItemFeature itemFeature = new ItemFeature(itemData.Key, PredictDate);
itemFeature.Update(itemData);
itemFeature.IsOnline = features.CheckIsOnline(itemFeature.Id);
//向ItemFeature绑定CategoryFeature
itemFeature.CategoryFeature = features.CategoryFeatureDict[itemFeature.CategoryId];
features.AddItemFeature(itemFeature);
}
var users = data.GroupBy(d => d.userid);
Console.WriteLine("正在添加用户相关特征...");
foreach (var userData in users)
{
UserFeature userFeature = new UserFeature(userData.Key, PredictDate);
userFeature.Update(userData);
features.AddUserFeature(userFeature);
var userCategories = userData.GroupBy(d => d.category);
foreach (var userCategoryData in userCategories)
{
UserCategoryFeature userCategoryFeature = new UserCategoryFeature(userCategoryData.Key, PredictDate);
userCategoryFeature.Update(userCategoryData);
userFeature.UserCategorieDict.Add(userCategoryFeature.CategoryId, userCategoryFeature);
features.AddUserCategoryFeature(userCategoryFeature);
}
var userItems = userData.GroupBy(d => d.itemid);
foreach (var userItemData in userItems)
{
UserItemFeature userItemFeature = new UserItemFeature(userFeature, userItemData.Key);
userItemFeature.Update(userItemData);
//是否是正例
userItemFeature.Label = features.CheckIsPositive(userItemFeature.UserId, userItemFeature.ItemId);
//向UserItemFeature 绑定ItemFeature
userItemFeature.ItemFeature = features.ItemFeatureDict[userItemFeature.ItemId];
//向UserItemFeature绑定UserCategoryFeature
userItemFeature.UserCategoryFeature = userItemFeature.UserFeature.UserCategorieDict[userItemFeature.ItemFeature.CategoryId];
features.AddUserItemFeature(userItemFeature);
}
}
if (Global.Normalized)
{
features.Normalize();
}
string dirname = Global.GetDirectoryName();
if (Directory.Exists(dirname) == false)
{
Directory.CreateDirectory(dirname);
}
string filename = dirname + Global.GetFileName(PredictDate);
features.Write(filename);
Console.WriteLine("运行完毕,耗时{0}s", (DateTime.Now.Ticks - startTime) / 10000000);
Console.WriteLine("{0} 输出完毕。", filename);
}
//Console.ReadKey();
}