static public void Reset()
{
lock (syncRoot)
{
instance = null;
}
}
public WmiSession(string sessionqualifier, WmiBase wmibase)
{
items = new Dictionary <string, XenStoreItem>();
cacheditems = new Dictionary <string, XenStoreItemCached>();
this.wmibase = wmibase;
name = sessionqualifier;
// First check to see if a "Citrix Xen Service" session exists. If
// so, we use that
// Otherwise we have to create a new session from scratch
try
{
ObjectQuery obq = new ObjectQuery(String.Format("SELECT * from CitrixXenStoreSession WHERE Id=\"Citrix Xen Service: {0}\"", sessionqualifier));
ManagementObjectSearcher mobs = new ManagementObjectSearcher(wmibase.Scope, obq);;
session = WmiBase.getFirst(mobs.Get());
session.InvokeMethod("EndSession", null);
}
catch
{
}
ManagementBaseObject inparam = wmibase.XenBase.GetMethodParameters("AddSession");
inparam["ID"] = String.Format("Citrix Xen Service: {0}", sessionqualifier);
ManagementBaseObject outparam = wmibase.XenBase.InvokeMethod("AddSession", inparam, null);
UInt32 sessionid = (UInt32)outparam["SessionId"];
ObjectQuery query = new ObjectQuery("SELECT * from CitrixXenStoreSession WHERE SessionId=" + sessionid.ToString());
ManagementObjectSearcher objects = new ManagementObjectSearcher(wmibase.Scope, query);;
session = WmiBase.getFirst(objects.Get());
}
public void HandleException(string from, Exception e)
{
try
{
if (e is ManagementException)
{
if (WmiBase.HandleManagementException(e as ManagementException))
{
Debug.Print("WMI objects cannot be located. Resetting service");
OnNeedsReset();
return;
}
}
wmisession.Log("Unhandled exception from " + from + ". Resetting service:\n" + e.ToString());
wmisession.Log("Dumping stored debug messages");
WmiBase.Singleton.DumpDebugMsg();
}
catch {
}
try
{
OnNeedsReset();
}
catch
{
Debug.Print("Reset failed");
}
}
void ServiceThreadHandler()
{
try {
Debug.Print("ServiceThreadHandler");
needsShutdown.Reset();
NetInfo.StoreChangedNetworkSettings();
WmiBase.Reset();
Debug.Print("WMI Check");
if (WmiBase.Check())
{
starting = true;
WmiCapableServiceThreadHandler();
starting = false;
running = true;
}
else
{
running = false;
WaitHandle[] waitHandles = new WaitHandle[]
{
(new WmiIncapableThread()).Incapable,
needsShutdown
};
Debug.Print("Waiting for WMI capability to begin");
try
{
EventLog.WriteEntry(Branding.Instance.getString("BRANDING_errNoWMI"));
}
catch { };
int activehandle = WaitHandle.WaitAny(waitHandles);
Debug.Print("Received event");
if (activehandle == 0)
{
try
{
EventLog.WriteEntry(Branding.Instance.getString("BRANDING_errNoWMI"));
}
catch { };
starting = true;
WmiCapableServiceThreadHandler();
starting = false;
running = true;
}
}
}
catch (Exception e) {
HandleException("Main Service Thread", e);
}
}
void ServiceThreadHandler()
{
try {
Debug.Print("ServiceThreadHandler");
needsShutdown.Reset();
WmiBase.Reset();
Debug.Print("WMI Check");
if (WmiBase.Check())
{
starting = true;
WmiCapableServiceThreadHandler();
starting = false;
running = true;
}
else
{
running = false;
WaitHandle[] waitHandles = new WaitHandle[]
{
(new WmiIncapableThread()).Incapable,
needsShutdown
};
Debug.Print("Waiting for WMI capability to begin");
try
{
EventLog.WriteEntry("Citrix Xen Guest Agent cannot find XenIface WMI interface");
}
catch { };
int activehandle = WaitHandle.WaitAny(waitHandles);
Debug.Print("Received event");
if (activehandle == 0)
{
try
{
EventLog.WriteEntry("Citrix Xen Guest Agent cannot find XenIface WMI interface");
}
catch { };
starting = true;
WmiCapableServiceThreadHandler();
starting = false;
running = true;
}
}
}
catch (Exception e) {
HandleException("Main Service Thread", e);
}
}
void WmiIncapableServiceThreadHandler(object nothing)
{
try {
WmiBase.Reset();
if (WmiBase.Check())
{
timer.Dispose();
Incapable.Set();
}
}
catch {
timer.Dispose();
Incapable.Set();
}
}
void ServiceThreadShutdown()
{
try {
try {
Refresher.Dispose();
Disposer.Dispose();
}
catch (Exception ex) {
wmisession.Log("Errors disposing of threads: " + ex.ToString());
throw;
}
wmisession.Log("Guest Agent Stopped");
try
{
wmisession.Dispose();
}
catch { }
}
catch {}
finally {
WmiBase.Reset();
}
}
public WmiSession(string sessionqualifier, WmiBase wmibase)
{
items = new Dictionary<string, XenStoreItem>();
cacheditems = new Dictionary<string, XenStoreItemCached>();
this.wmibase = wmibase;
name = sessionqualifier;
// First check to see if a "Citrix Xen Service" session exists. If
// so, we use that
// Otherwise we have to create a new session from scratch
try
{
ObjectQuery obq = new ObjectQuery(String.Format("SELECT * from CitrixXenStoreSession WHERE Id=\"Citrix Xen Service: {0}\"", sessionqualifier));
ManagementObjectSearcher mobs = new ManagementObjectSearcher(wmibase.Scope, obq); ;
session = WmiBase.getFirst(mobs.Get());
session.InvokeMethod("EndSession", null);
}
catch
{
}
ManagementBaseObject inparam = wmibase.XenBase.GetMethodParameters("AddSession");
inparam["ID"] = String.Format("Citrix Xen Service: {0}", sessionqualifier);
ManagementBaseObject outparam = wmibase.XenBase.InvokeMethod("AddSession", inparam, null);
UInt32 sessionid = (UInt32)outparam["SessionId"];
ObjectQuery query = new ObjectQuery("SELECT * from CitrixXenStoreSession WHERE SessionId=" + sessionid.ToString());
ManagementObjectSearcher objects = new ManagementObjectSearcher(wmibase.Scope, query); ;
session = WmiBase.getFirst(objects.Get());
}
public static void Reset()
{
lock (syncRoot)
{
instance = null;
}
}
