Dear Dimitry!
Thanks for your input!
We already have a custom component developed by Axeda, so (not knowing whether IEnterpriseProxy is COM, in-process, out-of-process, ...) I decided to extend that component (it also already has member of IEnterpriseProxy) and then (also adding this DI through Builder project) add my own DataItem.
The design seems not to be 100%ly elegant, but it does the job.
For usage, I have to set the DataItem with a "T" value, wait a bit, and then either get an "N" or an "F" (also not sure about AX_Char being wchar or something else, also unsure about allowed size of string, so I just limit to 1 char..).
I tested this and saw that I get the desired result (there is some delay when unplugging network, I suppose this is based on the ping rate currently set - can I force a connection attempt?).
Many thanks, best
Andreas
/////////////////////////////////////////////////////////////////////////////
//
// OnDataChange() Handle data change
//
/////////////////////////////////////////////////////////////////////////////
void StateChange::OnDataChange(int count, AX_DataItem* pItems)
{
AX_Char myResChars[64];
for (int i = 0; i < count; i++)
{
AX_DataItem* pItem = &pItems;
EString strDataItem = pItem->pszName;
if(strDataItem == /* ... */)
{
// ... existing code
}
else if(strDataItem == AGENT_QUERY_ONLINE)
{
AX_DataValue *pValue = &pItem->value;
if(pValue->iQuality == AX_DataGood && pValue->iType == AX_DataString)
{
AX_Char* pCh = pValue->data.pszString;
if (*pCh != 0)
{
if (*pCh == (AX_Char)TEXT('T')) // T == Test
{
AX_DataItem Item;
Item.iDeviceId = CONNECTOR_GATEWAY; // AgentQueryOnline data item lives on the Gateway
Item.pszName = (AX_Char*)AGENT_QUERY_ONLINE;
Item.bInhibit = AX_False;
Item.value.iType = AX_DataString;
Item.value.iQuality = AX_DataGood;
Item.value.timeStamp.iSec = time(NULL);
Item.value.timeStamp.iMilliSec = 0;
bool online;
this->m_pEnterprise->GetServerStatus(&online);
if (online)
myResChars[0]= (AX_Char)TEXT('N'); // N == oNline
else
myResChars[0]= (AX_Char)TEXT('F'); // F == oFfline
myResChars[1] = 0;
Item.value.data.pszString = myResChars;
AX_SetDataItems(1, &Item);
}
}
}
}
}
}
