/////////////////////////////////////////////////////////////////////////////
//
// Copyright(C) 1999 Microsoft Corporation all rights reserved.
//
// Module:      appliancetask.idl
//
// Project:     Chameleon
//
// Description: Appliance Task Interfaces
//
// Log: 
//
// Who     When            What
// ---     ----         ----
// TLP       01/28/1999    Original Version
//
/////////////////////////////////////////////////////////////////////////////

import "oaidl.idl";
import "ocidl.idl";

    //////////////////////////////////////////////////////////////////////////
    // IApplianceTask Interface
    //////////////////////////////////////////////////////////////////////////

    //////////////////////////////////////////////////////////////////////
        
    [public] typedef enum _SA_TASK_RESULT
    {
        SA_TASK_RESULT_COMMIT,
        SA_TASK_RESULT_ROLLBACK    

    } SA_TASK_RESULT;

    //////////////////////////////////////////////////////////////////////

    [
        object,
        uuid(845066C0-B8E2-11D2-A91C-00AA00A71DCA),
        dual,
        pointer_default(unique)
    ]

    interface IApplianceTask : IDispatch
    {

        //////////////////////////////////////////////////////////////////////
        //
        // Function: OnTaskExecute() - Called to invoke a task executable
        //
        // Inputs:   pTaskContext: Pointer to the ITaskContext interface on the
        //                           object that implements the task context. Note
        //                           that the task context object always contains
        //                           the "TaskId" in its input parameter set. Thus
        //                           Thus a single task executable can participate
        //                           in the execution of multiple tasks by taking
        //                           appropriate action based on the task id.
        //
        // Outputs:  S_OK:          Task execution succeeded
        //                 
        //             FAILED(hr):  Unable to complete the task - result in hr
        //                          is returned to the calling application.
        //
        //////////////////////////////////////////////////////////////////////
        [id(1)]
        HRESULT OnTaskExecute(
                              [in] IUnknown* pTaskContext
                             );

        //////////////////////////////////////////////////////////////////////
        //
        // Function: OnTaskComplete() - Called when a task has completed 
        //
        // Inputs:   pTaskContext: Pointer to the ITaskContext interface on the
        //                           object that implements the task context. Note
        //                           that the task context object always contains
        //                           the "TaskId" in its input parameter set. Thus
        //                           Thus a single task executable can participate
        //                           in the execution of multiple tasks.
        //
        //           lTaskResult: Task result. If set to SA_TASK_RESULT_COMMIT 
        //                          then task execution was successful. If set
        //                          to SA_TASK_RESULT_ROLLBACK then task exectuion
        //                          failed and the component should rollback any
        //                          changes performed during task execution
        //                          (if appropriate)
        //
        // Outputs:  Task Components should return S_OK
        //
        //////////////////////////////////////////////////////////////////////
        [id(2)]
        HRESULT OnTaskComplete(
                               [in] IUnknown* pTaskContext, 
                               [in] LONG      lTaskResult
                              );
    };