枚举服务的副本

本主题包括一个代码示例,该示例枚举整个企业中不同主机计算机上的已复制服务的已安装实例。 若要为复制的服务的每个实例更改服务帐户密码,请将此代码示例与 " 更改服务用户帐户的密码 " 主题中的代码示例结合使用。

此代码示例假定每个服务实例都有其自己的服务连接点 (SCP) 目录中的对象。 SCP 是 serviceConnectionPoint 类的对象。 此类具有 关键字 属性,该属性是复制到林中的每个全局编录 (GC) 的多值属性。 每个实例的 SCP 的 关键字 属性包含服务的产品 GUID。 这样,就可以通过搜索具有等于产品 GUID 的 关键字 属性的对象的 GC,查找各种服务实例的所有 scp。

此代码示例获取指向 GC 的 IDirectorySearch 指针,并使用 IDirectorySearch:: ExecuteSearch 方法搜索 scp。 请注意,GC 包含每个 SCP 的部分副本。 也就是说,它包含一些 SCP 属性,但并非全部。 在此代码示例中,重点介绍 serviceDNSName 属性,该属性包含该服务实例的主机服务器的 DNS 名称。 由于 serviceDNSName 不是在 GC 中复制的属性之一,此代码示例使用两个步骤来检索它。 首先,它使用垃圾搜索来获取 SCP (DN) 的可分辨名称,然后使用该 DN 直接绑定到 SCP 来检索 serviceDNSName 属性。

HRESULT EnumerateServiceInstances(
       LPWSTR szQuery,                // Search string filter.
       LPWSTR *pszAttribs,            // An array of attributes 
                                      // to retrieve.
       DWORD dwAttribs,               // # of attributes requested.
       DWORD *pdwAttribs,             // # of attributes retrieved.
       ADS_ATTR_INFO **ppPropEntries  // Returns a pointer to the 
                                      // retrieved attributes.
        )
{
HRESULT hr;
IEnumVARIANT *pEnum = NULL;
IADsContainer *pCont = NULL;
VARIANT var;
IDispatch *pDisp = NULL;
BSTR  bstrPath = NULL;
ULONG lFetch;
IADs *pADs = NULL;
int iRows=0;
static IDirectorySearch *pSearch = NULL;
static ADS_SEARCH_HANDLE hSearch = NULL;

// Parameters for IDirectoryObject.
IDirectoryObject *pSCP = NULL;
 
// Structures and parameters for IDirectorySearch.
DWORD               dwPref;
ADS_SEARCH_COLUMN   Col;
ADS_SEARCHPREF_INFO SearchPref[2];
 
// First time through; set up the search.
if (pSearch == NULL) 
{
    // Bind to the GC: namespace container object. The GC DN 
    // is a single immediate child of the GC: namespace, which must 
    // be obtained through enumeration.
    hr = ADsGetObject(L"GC:", 
        IID_IADsContainer, 
        (void**) &pCont );
    if (FAILED(hr)) {
        _tprintf(TEXT("ADsGetObject(GC) failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Obtain an enumeration interface for the GC container. 
    hr = ADsBuildEnumerator(pCont,&pEnum);
    if (FAILED(hr)) {
        _tprintf(TEXT("ADsBuildEnumerator failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Enumerate. There is only one child of the GC: object.
    hr = ADsEnumerateNext(pEnum,1,&var,&lFetch);
    if (( hr == S_OK ) && ( lFetch == 1 ) ) 
    {
        pDisp = V_DISPATCH(&var);
        hr = pDisp->QueryInterface( IID_IADs, (void**)&pADs);
        if (hr == S_OK) 
            hr = pADs->get_ADsPath(&bstrPath);
    }
    if (FAILED(hr)) {
        _tprintf(TEXT("Enumeration failed: 0x%x\n"), hr);
        goto Cleanup;
    }
 
    // Now bstrPath contains the ADsPath for the current GC.  
    // Bind the GC to get the search interface.
    hr = ADsGetObject(bstrPath, 
                      IID_IDirectorySearch, 
                      (void**)&pSearch);
    if (FAILED(hr)) {
        _tprintf(TEXT("Failed to bind search root: 0x%x\n"), hr);
        goto Cleanup;
    } 
 
    // Set up a deep search.
    // Thousands of objects are not expected
    // in this example; request 1000 rows per page.
    dwPref=sizeof(SearchPref)/sizeof(ADS_SEARCHPREF_INFO);
    SearchPref[0].dwSearchPref =    ADS_SEARCHPREF_SEARCH_SCOPE;
    SearchPref[0].vValue.dwType =   ADSTYPE_INTEGER;
    SearchPref[0].vValue.Integer =  ADS_SCOPE_SUBTREE;
 
    SearchPref[1].dwSearchPref =    ADS_SEARCHPREF_PAGESIZE;
    SearchPref[1].vValue.dwType =   ADSTYPE_INTEGER;
    SearchPref[1].vValue.Integer =  1000;
 
    hr = pSearch->SetSearchPreference(SearchPref, dwPref);
    if (FAILED(hr))    {
        _tprintf(TEXT("Failed to set search prefs: 0x%x\n"), hr);
        goto Cleanup;
    } 
 
    // Execute the search. From the GC, get the distinguished name 
    // of the SCP. Use the DN to bind to the SCP and get the other 
    // properties.
    hr = pSearch->ExecuteSearch(szQuery, pszAttribs, 1, &hSearch);
    if (FAILED(hr)) {
        _tprintf(TEXT("ExecuteSearch failed: 0x%x\n"), hr);
        goto Cleanup;
    } 
}
 
// Get the next row.
hr = pSearch->GetNextRow(hSearch);
 
// Process the row.
if (SUCCEEDED(hr) && hr !=S_ADS_NOMORE_ROWS) 
{
    // Get the distinguished name of the object in this row.
    hr = pSearch->GetColumn(hSearch, L"distinguishedName", &Col);
    if FAILED(hr) { 
        _tprintf(TEXT("GetColumn failed: 0x%x\n"), hr);
        goto Cleanup;
    }
    // Bind to the DN to get the properties.
    if (Col.dwADsType == ADSTYPE_CASE_IGNORE_STRING)
    {
        LPWSTR szSCPPath = 
          new WCHAR[7 + lstrlenW(Col.pADsValues->CaseIgnoreString) + 1];
        wcscpy_s(szSCPPath, L"LDAP://");
        wcscat_s(szSCPPath, Col.pADsValues->CaseIgnoreString);
        hr = ADsGetObject(szSCPPath, 
                          IID_IDirectoryObject,
                          (void**)&pSCP);
        delete szSCPPath;
        if (SUCCEEDED(hr)) 
        {
            hr = pSCP->GetObjectAttributes(pszAttribs, dwAttribs,
                          ppPropEntries, pdwAttribs);
            if(FAILED(hr)) {
                _tprintf(TEXT("GetObjectAttributes Failed."), hr);
                goto Cleanup;
            }
        }
    }
    pSearch->FreeColumn(&Col);}
 
Cleanup:
if (bstrPath)
    SysFreeString(bstrPath);
if (pSCP) 
    pSCP->Release();
if (pCont) 
    pCont->Release();
if (pEnum)
    ADsFreeEnumerator(pEnum);
if (pADs) 
    pADs->Release();
if (pDisp)
    pDisp->Release();
 
return hr;
 
}