internal static SafeHResource GetTransactionManagerClusterResource(string virtualServerName, out string[] nodes)
{
nodes = null;
#pragma warning suppress 56523
SafeHCluster hCluster = SafeNativeMethods.OpenCluster(null);
if (hCluster.IsInvalid)
{
return null;
}
using (hCluster)
{
//W2k3 cluster
if (Utilities.OSMajor <= 5)
{
if (Utilities.IsLocalMachineName(virtualServerName))
{
virtualServerName = GetClusterName(hCluster);
}
}
#pragma warning suppress 56523
SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Resource);
if (hEnum.IsInvalid)
{
return null;
}
using (hEnum)
{
uint index = 0;
bool moreToEnumerate;
SafeHResource hResource;
do
{
string theResourceName = string.Empty;
moreToEnumerate = GetResourceFromEnumeration(hCluster, hEnum, index, out hResource, out theResourceName);
if (moreToEnumerate)
{
if (IsTransactionManager(hResource))
{
string networkName = GetResourceNetworkName(hResource);
Utilities.Log("Resource network name: " + networkName);
if (Utilities.SafeCompare(networkName, virtualServerName))
{
nodes = GetClusterNodes(hCluster);
return hResource;
}
}
hResource.Dispose();
index++;
}
} while (moreToEnumerate);
}
}
return null;
}
internal static bool ResolveVirtualServerName(string machineName, string dtcResourceName, out string virtualServer)
{
virtualServer = string.Empty;
#pragma warning suppress 56523
SafeHCluster hCluster = SafeNativeMethods.OpenCluster(Utilities.IsLocalMachineName(machineName) ? null : machineName);
if (hCluster.IsInvalid)
{
return false;
}
using (hCluster)
{
#pragma warning suppress 56523
SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Resource);
if (hEnum.IsInvalid)
{
return false;
}
using (hEnum)
{
uint index = 0;
bool moreToEnumerate;
SafeHResource hResource;
do
{
string theResourceName = string.Empty;
moreToEnumerate = GetResourceFromEnumeration(hCluster, hEnum, index, out hResource, out theResourceName);
if (moreToEnumerate)
{
if (IsTransactionManager(hResource))
{
if (string.CompareOrdinal(theResourceName, dtcResourceName) == 0)
{
virtualServer = GetResourceNetworkName(hResource);
return true;
}
}
hResource.Dispose();
index++;
}
} while (moreToEnumerate);
}
}
return false;
}
static bool GetResourceFromEnumeration(SafeHCluster hCluster,
SafeHClusEnum hEnum,
uint index, out SafeHResource hResource, out string theResourceName)
{
uint type, cch = 0;
hResource = null;
theResourceName = string.Empty;
uint ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, null, ref cch);
if (ret == SafeNativeMethods.ERROR_NO_MORE_ITEMS)
{
return(false);
}
else if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA)
{
StringBuilder sb = new StringBuilder((int)(++cch));
ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, sb, ref cch);
if (ret == SafeNativeMethods.ERROR_SUCCESS)
{
string resourceName = sb.ToString();
#pragma warning suppress 56523
hResource = SafeNativeMethods.OpenClusterResource(hCluster, resourceName);
if (hResource.IsInvalid)
{
hResource = null;
}
else
{
theResourceName = resourceName;
}
}
}
return(true);
}
static string[] GetClusterNodes(SafeHCluster hCluster)
{
#pragma warning suppress 56523
SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Node);
if (hEnum.IsInvalid)
{
return null;
}
List<string> nodeList = new List<string>(2); // 2 nodes are a typical cluster configuration
using (hEnum)
{
uint ret, index = 0;
do
{
uint type, cch = 0;
ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, null, ref cch);
if (ret == SafeNativeMethods.ERROR_NO_MORE_ITEMS)
{
break;
}
else if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA)
{
StringBuilder sb = new StringBuilder((int)(++cch));
ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, sb, ref cch);
if (ret == SafeNativeMethods.ERROR_SUCCESS)
{
Utilities.Log("Found a node: [" + sb.ToString() + "]");
nodeList.Add(sb.ToString());
}
}
index++;
} while (ret == SafeNativeMethods.ERROR_SUCCESS);
}
return nodeList.ToArray();
}
static bool GetResourceFromEnumeration(SafeHCluster hCluster,
SafeHClusEnum hEnum,
uint index, out SafeHResource hResource, out string theResourceName)
{
uint type, cch = 0;
hResource = null;
theResourceName = string.Empty;
uint ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, null, ref cch);
if (ret == SafeNativeMethods.ERROR_NO_MORE_ITEMS)
{
return false;
}
else if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA)
{
StringBuilder sb = new StringBuilder((int)(++cch));
ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, sb, ref cch);
if (ret == SafeNativeMethods.ERROR_SUCCESS)
{
string resourceName = sb.ToString();
#pragma warning suppress 56523
hResource = SafeNativeMethods.OpenClusterResource(hCluster, resourceName);
if (hResource.IsInvalid)
{
hResource = null;
}
else
{
theResourceName = resourceName;
}
}
}
return true;
}
internal static extern uint ClusterEnum(
[In] SafeHClusEnum hEnum,
[In] uint dwIndex,
[Out] out uint lpdwType,
[Out] StringBuilder lpszName,
[In, Out] ref uint lpcchName);