public virtual IDbConnection CreateDbConnection(string connectionString, IDbConnectionResolver connectionResolver, string connectionProviderName)
{
IDbConnection dbConnection = null;
var activeTransaction = this.GetActiveTransactionInfo(connectionString);
if (activeTransaction == null)
{
dbConnection = connectionResolver.Resolve(connectionString, this.Options, connectionProviderName);
var dbTransaction = dbConnection.BeginTransaction(
(Options.IsolationLevel ?? System.Transactions.IsolationLevel.ReadUncommitted).ToSystemDataIsolationLevel()
);
activeTransaction = new ActiveTransactionInfo(dbTransaction, dbConnection);
ActiveTransactions[connectionString] = activeTransaction;
}
return(dbConnection);
}
public virtual DbContext CreateDbContext(string connectionString, IDbContextResolver dbContextResolver, string dbContextProviderName)
{
DbContext dbContext;
var activeTransaction = ActiveTransactions.GetOrDefault(connectionString);
if (activeTransaction == null)
{
dbContext = dbContextResolver.Resolve(connectionString, null, this.Options, dbContextProviderName);
// 缓存模型
_contextModelStorage.AddOrUpdate(connectionString, dbContext.Model);
var dbtransaction = dbContext.Database.BeginTransaction((Options.IsolationLevel ?? IsolationLevel.ReadUncommitted).ToSystemDataIsolationLevel());
activeTransaction = new ActiveTransactionInfo(dbtransaction, dbContext);
ActiveTransactions[connectionString] = activeTransaction;
}
else
{
dbContext = dbContextResolver.Resolve(
connectionString,
activeTransaction.DbContextTransaction.GetDbTransaction().Connection,
this.Options,
dbContextProviderName
);
if (dbContext.HasRelationalTransactionManager())
{
dbContext.Database.UseTransaction(activeTransaction.DbContextTransaction.GetDbTransaction());
}
else
{
dbContext.Database.BeginTransaction();
}
activeTransaction.AttendedDbContexts.Add(dbContext);
}
return(dbContext);
}
