CMessage *
CMyApplication::transact (
CMessage * pSendMsg)
{
CConnection * pConn = m_pConnectionToReader;
CMessage * pRspMsg;
/*
* Print the XML text for the outbound message if
* verbosity is 2 or higher.
*/
if(1 < m_Verbose)
{
printf("\n===================================\n");
printf("INFO: Transact sending\n");
printXMLMessage(pSendMsg);
}
/*
* Send the message, expect the response of certain type.
* If LLRP::CConnection::transact() returns NULL then there was
* an error. In that case we try to print the error details.
*/
pRspMsg = pConn->transact(pSendMsg, 5000);
if(NULL == pRspMsg)
{
const CErrorDetails * pError = pConn->getTransactError();
printf("ERROR: %s transact failed, %s\n",
pSendMsg->m_pType->m_pName,
pError->m_pWhatStr ? pError->m_pWhatStr : "no reason given");
if(NULL != pError->m_pRefType)
{
printf("ERROR: ... reference type %s\n",
pError->m_pRefType->m_pName);
}
if(NULL != pError->m_pRefField)
{
printf("ERROR: ... reference field %s\n",
pError->m_pRefField->m_pName);
}
return NULL;
}
/*
* Print the XML text for the inbound message if
* verbosity is 2 or higher.
*/
if(1 < m_Verbose)
{
printf("\n- - - - - - - - - - - - - - - - - -\n");
printf("INFO: Transact received response\n");
printXMLMessage(pRspMsg);
}
/*
* If it is an ERROR_MESSAGE (response from reader
* when it can't understand the request), tattle
* and declare defeat.
*/
if(&CERROR_MESSAGE::s_typeDescriptor == pRspMsg->m_pType)
{
const CTypeDescriptor * pResponseType;
pResponseType = pSendMsg->m_pType->m_pResponseType;
printf("ERROR: Received ERROR_MESSAGE instead of %s\n",
pResponseType->m_pName);
delete pRspMsg;
pRspMsg = NULL;
}
return pRspMsg;
}
