private void clearDatabaseTables(Data.Contexts.DomainModelMySqlContext context,
IEnumerable <JToken> models)
{
Console.WriteLine("emptying whole DB...");
var dbName = context.Database.GetDbConnection().Database;
// this is for returning all tables from DB for deleting
// but there doesn't seem to be a way to return string
// from DB
var sql = @"SELECT concat('DROP TABLE IF EXISTS `', table_name, '`;')
FROM information_schema.tables
WHERE table_schema = '" + dbName + "';";
/*
* sql += " AND (";
* foreach(var model in models)
* {
* var s = string.Format(" OR table_name = '{0}'", (string)model["Name"]);
* sql += s;
* }
* sql += ");";
*/
var conn = context.Database.GetDbConnection();
try
{
conn.Open();
var delScript = "SET FOREIGN_KEY_CHECKS = 0;" + Environment.NewLine;
// get the delete script
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = sql;
using (var rdr = cmd.ExecuteReader())
{
while (rdr.Read())
{
delScript += rdr[0] + Environment.NewLine;
}
rdr.Close();
}
delScript += "SET FOREIGN_KEY_CHECKS = 1;";
cmd.CommandText = delScript;
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
throw ex.InnerException;
}
finally
{
conn.Close();
}
}
private void importType(JToken model, Data.Contexts.DomainModelMySqlContext context)
{
var typeName = (string)model["ModelTypeName"];
var fileName = (string)model["Name"];
fileName = _inputDirectory + "extracted-files" + Path.DirectorySeparatorChar + fileName + ".json";
var oneAtTheTime = _globalOneAtTheTime;
// check if we should import one at the time (this is used for debugging)
if (model["ImportOneAtTheTime"] != null)
{
oneAtTheTime = (bool)model["ImportOneAtTheTime"];
}
Console.Write("seeding data: " + typeName + " .... ");
// get types
var myType = Type.GetType(typeName);
var myListType = typeof(List <>).MakeGenericType(myType);
var items = (IEnumerable <object>)JsonConvert.DeserializeObject(File.ReadAllText(fileName), myListType);
var objItems = items.ToArray <object>();
if (!oneAtTheTime)
{
context.AddRange(objItems);
try
{
context.SaveChanges();
}
catch (Exception ex)
{
Console.Write(ex.ToString());
}
}
else
{
var count = objItems.Count();
var ind = 0;
Console.Write(" " + count.ToString() + " items ... ");
// lets add one by one
foreach (var item in objItems)
{
ind++;
if (ind % 10 == 0)
{
Console.Write(".");
}
try
{
context.Add(item);
context.SaveChanges();
}
catch (Exception ex)
{
Console.WriteLine("EXCEPTION ADDING OBJECT:");
Console.WriteLine(item);
throw ex.InnerException;
}
}
}
Console.Write("done!" + Environment.NewLine);
}
private void importTypeWithReader(JToken model, Data.Contexts.DomainModelMySqlContext context)
{
var typeName = (string)model["ModelTypeName"];
var fileName = (string)model["Name"];
fileName = _inputDirectory + "extracted-files" + Path.DirectorySeparatorChar + fileName + ".json";
var oneAtTheTime = _globalOneAtTheTime;
// check if we should import one at the time (this is used for debugging)
if (model["ImportOneAtTheTime"] != null)
{
oneAtTheTime = (bool)model["ImportOneAtTheTime"];
}
Console.WriteLine("seeding data: " + typeName + " .... ");
// get types
var myType = Type.GetType(typeName);
var myListType = typeof(List <>).MakeGenericType(myType);
var logTimes = 0; // used for debugging
context.ChangeTracker.AutoDetectChangesEnabled = false;
var commitCount = 100000;
var objItems = new HashSet <object>();
using (var stream = File.OpenRead(fileName))
using (StreamReader streamReader = new StreamReader(stream))
using (JsonTextReader reader = new JsonTextReader(streamReader))
{
reader.SupportMultipleContent = true;
var serializer = new JsonSerializer();
while (reader.Read())
{
if (reader.TokenType == JsonToken.StartObject)
{
var myObject = serializer.Deserialize(reader, myType);
objItems.Add(myObject);
// save to every x-objects
if (objItems.Count() == commitCount)
{
Console.WriteLine("inserting " + (++logTimes * commitCount).ToString("#,##0"));
context.AddRange(objItems);
try
{
context.SaveChanges();
}
catch (Exception ex)
{
Console.Write(ex.ToString());
}
objItems = new HashSet <object>();
}
}
}
if (objItems.Any())
{
Console.WriteLine("inserting: " + objItems.Count().ToString("#,##0"));
context.AddRange(objItems);
context.SaveChanges();
}
}
Console.Write("done!" + Environment.NewLine);
}
