IWMSAdminArchiveSink::ExpandTemplate

IWMSAdminArchiveSink::ExpandTemplate

The ExpandTemplate method retrieves the expanded path of the tokenized template.

Syntax

Parameters

bstrTemplate

[in] BSTR containing the tokenized template.

pbstrExpandedPath

[out] Pointer to a BSTR containing the expanded path of the template.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Remarks

A template path can contain environment variables and wildcard characters that are replaced with appropriate values when the file is created by the server. Valid wildcard characters used by Windows Media Services are identified in the following table.

• Note   When the information denoted by the wildcard is not present on the system, the server will substitute an underscore character (_) for it. Also, because a playlist is considered a single presentation unit, time and date wildcards will expand to the same value for all entries in the playlist.

The following wildcard characters are available for use with archive files only.

Example Code

#include <windows.h>
#include <atlbase.h>    // Includes CComBSTR and CComVariant.

// To access system plug-in interfaces, the
// entire type library must be imported as shown.

#import "WMSServerTypeLib.dll" no_namespace named_guids \
                               raw_interfaces_only

// Declare variables and interfaces.
IWMSServer                    *pServer;
IWMSPublishingPoints          *pPubPoints;
IWMSPublishingPoint           *pPubPoint;
IWMSBroadcastPublishingPoint  *pBCPubPoint;
IWMSPlugins                   *pPlugins;
IWMSPlugin                    *pPlugin;
IDispatch                     *pDispatch;
IWMSAdminArchiveSink          *pAdminArchiveSink;

HRESULT         hr;
CComVariant     varIndex;
CComBSTR        bstrName;
CComBSTR        bstrFile;
CComBSTR        bstrExpanded;

// Initialize the COM library and retrieve a pointer
// to an IWMSServer interface.
hr = CoInitialize(NULL);
hr = CoCreateInstance(CLSID_WMSServer,
                      NULL,
                      CLSCTX_ALL,
                      IID_IWMSServer,
                      (void **)&pServer);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSPublishingPoints
// interface and add a new broadcast publishing point.
hr = pServer->get_PublishingPoints(&pPubPoints);
if (FAILED(hr)) goto EXIT;
bstrName = "NewPubPoint";
bstrFile = "https://encoder:port";
hr = pPubPoints->Add(bstrName, WMS_PUBLISHING_POINT_BROADCAST,
                     bstrFile, &pPubPoint);
if (FAILED(hr)) goto EXIT;

// Query the IWMSBroadcastPublishingPoint interface from
// the newly created publishing point.
hr = pPubPoint->QueryInterface(IID_IWMSBroadcastPublishingPoint,
                              (void **)&pBCPubPoint);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to an IWMSPlugins interface
// containing broadcast data sink plug-ins.
hr = pBCPubPoint->get_BroadcastDataSinks(&pPlugins);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the IWMSPlugin interface
// of the plug-in to be configured.
varIndex = "WMS Archive Data Writer";
hr = pPlugins->get_Item(varIndex, &pPlugin);
if (FAILED(hr)) goto EXIT;

// Retrieve a pointer to the custom interface
// of the plug-in.
hr = pPlugin->get_CustomInterface(&pDispatch);
if (FAILED(hr)) goto EXIT;

// Query the specific administration interface
// for the plug-in.
hr = pDispatch->QueryInterface(IID_IWMSAdminArchiveSink,
                              (void **)&pAdminArchiveSink);
if (FAILED(hr)) goto EXIT;

// Retrieve the path to content currently being archived.
hr = pAdminArchiveSink->get_ActivePath(&bstrFile);
if (FAILED(hr)) goto EXIT;

// Expand the template path for archived content.
hr = pAdminArchiveSink->get_Path(&bstrFile);
if (FAILED(hr)) goto EXIT;
hr = pAdminArchiveSink->ExpandTemplate(bstrFile, &bstrExpanded);
if (FAILED(hr)) goto EXIT;

EXIT:
    // TODO: Release temporary COM objects and uninitialize COM.

Requirements

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003 family, Windows Server 2008 family.

See Also

• IWMSAdminArchiveSink Interface