private IDatabase CreateDatabase(ContextServiceContext context)
{
var factory = context.ServiceProvider.TryGetService <IDatabaseFactory>();
if (factory != null)
{
return(factory.Create(context.Options));
}
IDatabase database;
if (context.Options.Provider != null && context.Options.ConnectionString != null)
{
database = new Database(context.Options.ConnectionString, context.Options.Provider).TrySetServiceProvider(context.ServiceProvider);
}
else
{
throw new InvalidOperationException(SR.GetString(SRKind.NotSupportDatabaseFactory));
}
if (EntityTransactionScope.IsInTransaction())
{
database.BeginTransaction();
EntityTransactionScope.Current.Addransaction((string)context.Options.ConnectionString, this);
}
return(database);
}
/// <summary>
/// 初始化 <see cref="DefaultContextService"/> 类的新实例。
/// </summary>
/// <param name="context"></param>
/// <param name="databaseFactory">一个用于创建 <see cref="IDatabase"/> 的工厂函数。</param>
public DefaultContextService(ContextServiceContext context)
: base(context)
{
_databaseCreateor = () => CreateDatabase(context);
QueryPolicy = new DefaultQueryPolicy(Provider);
}
/// <summary>
/// 初始化 <see cref="ContextServiceBase"/> 类的新实例。
/// </summary>
/// <param name="context"></param>
protected ContextServiceBase(ContextServiceContext context)
{
Provider = context.Options.Provider;
ContextType = context.ContextType;
ServiceProvider = context.ServiceProvider;
Options = context.Options;
InstanceName = ContextInstanceManager.TryAdd(context.Options);
}
IContextService IContextProvider.CreateContextService(ContextServiceContext context)
{
return(new DefaultContextService(context));
}
