OLE DB的SAS提供程序（SAS.IOMProvider）不适用于ObjectPool

Posted 2021-04-19

我正在使用SAS Integration Technologies COM组件从C＃.NET项目连接到SAS服务器。我想将语句提交给SAS工作区，然后使用OLE DB提供程序（SAS.IOMProvider）从SAS加载输出数据集。我可以使用这样的代码成功完成此操作：

static int Main(string[] args)
{
    var keeper = new ObjectKeeper();
    var factory = new ObjectFactoryMulti2();
    var server = new ServerDef()
    {
        MachineDNSName = "sas.server.com",
        Protocol = Protocols.ProtocolBridge,
        Port = 8591,
        BridgeSecurityPackage = "Negotiate",
    };
    var workspace = (IWorkspace)factory.CreateObjectByServer("Workspace1", true, server, null, null);

    keeper.AddObject(1, workspace.UniqueIdentifier, workspace);

    try
    {
        using (var conn = new OleDbConnection("Provider=SAS.IOMProvider.1; Data Source=iom-id://" + workspace.UniqueIdentifier))
        {
            // success
            conn.Open();
        }
    }
    catch (Exception ex)
    {
        System.Console.Error.WriteLine(ex.ToString());
        return 1;
    }
    finally
    {
        keeper.RemoveObject(workspace);
        workspace.Close();
    }

    return 0;
}

但是，当我尝试使用ObjectPool的ObjectFactoryMulti2功能时，OLE DB连接不起作用。它总是抛出“无法找到对象;确保它先前已添加到对象管理器中。”这是不起作用的代码：

static int Main(string[] args)
{
    var keeper = new ObjectKeeper();
    var factory = new ObjectFactoryMulti2();
    var server = new ServerDef()
    {
        MachineDNSName = "sas.server.com`",
        Protocol = Protocols.ProtocolBridge,
        Port = 8591,
        BridgeSecurityPackage = "Negotiate",
        MaxPerObjectPool = Environment.ProcessorCount,
        RunForever = true,
        RecycleActivationLimit = 100,
    };
    var login = new LoginDef();

    var pool = factory.ObjectPools.CreatePoolByServer("Pool1", server, login);
    var lease = pool.GetPooledObject(null, null, 5000);
    var workspace = (IWorkspace)lease.SASObject;

    keeper.AddObject(1, workspace.UniqueIdentifier, workspace);

    try
    {
        using (var conn = new OleDbConnection("Provider=SAS.IOMProvider.1; Data Source=iom-id://" + workspace.UniqueIdentifier))
        {
            // throws System.Data.OleDb.OleDbException: 'The object 1EFCE532-99BA-4A27-AF37-574EAE1CD04C could not be found; make sure it was previously added to the object keeper.'
            conn.Open();
        }
    }
    catch (Exception ex)
    {
        System.Console.Error.WriteLine(ex.ToString());
        return 1;
    }
    finally
    {
        keeper.RemoveObject(workspace);
        lease.ReturnToPool();
        pool.Shutdown();
    }

    return 0;
}

有没有办法在SAS OLE DB提供程序中使用SAS连接池？

答案

SAS支持部门对此问题给出了很好的答案。使用连接池时，必须将工作空间强制转换为IServerStatus并使用其ServerStatusUniqueID属性而不是IWorkspace.UniqueIdentifier进行连接。

var pool = factory.ObjectPools.CreatePoolByServer("Pool1", server, login);
var lease = pool.GetPooledObject(null, null, 5000);
var workspace = (IWorkspace)lease.SASObject;
var status = (IServerStatus)lease.SASObject;

keeper.AddObject(1, workspace.UniqueIdentifier, workspace);

using (var conn = new OleDbConnection("Provider=SAS.IOMProvider.1; Data Source=iom-id://" + status.ServerStatusUniqueID))
{
    // success
    conn.Open();
}

keeper.RemoveObject(workspace);
lease.ReturnToPool();