IWMSAdminMulticastSink::put_UnicastRolloverURL

The put_UnicastRolloverURL method specifies the unicast URL used to redirect clients when a multicast session request fails.

HRESULT put_UnicastRolloverURL(
  BSTR  bstrUnicastURL
);

Arguments

bstrUnicastURL

[in] BSTR containing the URL.

Return Value

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

Return code	Number	Description
E_INVALIDARG	0x80070057	The bstrUnicastURL parameter is NULL.
E_OUTOFMEMORY	0x8007000E	The server could not allocate memory to copy the rollover URL to a local variable.

Example

#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;
IWMSAdminMulticastSink        *pAdminMulticastSink;

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

// 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 = "Push:*";
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 Multicast 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_IWMSAdminMulticastSink,
                              (void **)&pAdminMulticastSink);
if (FAILED(hr)) goto EXIT;

// Set the default unicast rollover URL.
bstrValue = "mms://unicast_server/";
hr = pAdminMulticastSink->put_UnicastRolloverURL(bstrValue);
if (FAILED(hr)) goto EXIT;

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

Requirements

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008 Enterprise; Windows Server 2008 Datacenter.

See Also

Reference

IWMSAdminMulticastSink Interface