IWMSAdminMulticastSink::get_UnicastRolloverURL
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IWMSAdminMulticastSink::get_UnicastRolloverURL
The get_UnicastRolloverURL method retrieves a custom unicast URL used to redirect clients when a multicast session request fails.
Syntax
HRESULT get_UnicastRolloverURL( BSTR* pbstrUnicastURL );
Parameters
pbstrUnicastURL
[out] Pointer to a BSTR containing the unicast URL.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Number | Description |
| E_POINTER | 0x80004003 | The pbstrUnicastURL parameter is NULL. |
Remarks
A unicast rollover URL can be either a custom or default type.
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;
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;
// Retrieve the default unicast rollover URL.
hr = pAdminMulticastSink->get_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
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