C++ LM_E函数代码示例

/* ****************************************************************************
*
* semInit -
*
*   parameter #2: 0 - the semaphore is to be shared between threads,
*   parameter #3: 1 - initially the semaphore is free
*
* RETURN VALUE (of sem_init)
*   0 on success,
*  -1 on failure
*
*/
int semInit(SemOpType _reqPolicy, bool semTimeStat, int shared, int takenInitially)
{
  if (sem_init(&reqSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'req' semaphore: %s)", strerror(errno)));
    return -1;
  }

  if (sem_init(&transSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'transactionId' semaphore: %s)", strerror(errno)));
    return -1;
  }

  if (sem_init(&cacheSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'cache' semaphore: %s)", strerror(errno)));
    return -1;
  }

  if (sem_init(&timeStatSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'timeStat' semaphore: %s)", strerror(errno)));
    return -1;
  }

  reqPolicy = _reqPolicy;

  // Measure accumulated semaphore waiting time?
  semWaitStatistics = semTimeStat;
  return 0;
}

/* ****************************************************************************
*
* attributeValue - return value of attribute as a string
*/
static void attributeValue(std::string* valueP, const std::vector<ContextAttribute*>& vec, char* attrName)
{
  for (unsigned int ix = 0; ix < vec.size(); ++ix)
  {
    if (vec[ix]->name != attrName)
    {
      continue;
    }

    if (vec[ix]->valueType == orion::ValueTypeString)
    {
      *valueP = vec[ix]->stringValue;
    }
    else if (vec[ix]->valueType == orion::ValueTypeNumber)
    {
      *valueP = toString(vec[ix]->numberValue);
    }
    else if (vec[ix]->valueType == orion::ValueTypeBoolean)
    {
      *valueP = (vec[ix]->boolValue == true)? "true" : "false";
    }
    else if (vec[ix]->valueType == orion::ValueTypeNone)
    {
      *valueP = "null";
    }
    else if ((vec[ix]->valueType == orion::ValueTypeObject) || (vec[ix]->valueType == orion::ValueTypeVector))
    {
      if (vec[ix]->compoundValueP)
      {
        if (vec[ix]->compoundValueP->valueType == orion::ValueTypeVector)
        {
          *valueP = "[" + vec[ix]->compoundValueP->toJson(true) + "]";
        }
        else if (vec[ix]->compoundValueP->valueType == orion::ValueTypeObject)
        {
          *valueP = "{" + vec[ix]->compoundValueP->toJson(true) + "}";
        }
        else
        {
          LM_E(("Runtime Error (attribute is of object type but its compound is of invalid type)"));
          *valueP = "";
        }
      }
      else
      {
        LM_E(("Runtime Error (attribute is of object type but has no compound)"));
        *valueP = "";
      }
    }
    else
    {
      LM_E(("Runtime Error (unknown value type for attribute)"));
      *valueP = "";
    }

    return;
  }

  *valueP = "";
}

/* ****************************************************************************
*
* RegisterContextRequest::check - 
*/
std::string RegisterContextRequest::check(RequestType requestType, Format format, std::string indent, std::string predetectedError, int counter)
{
  RegisterContextResponse  response(this);
  std::string              res;

  if (predetectedError != "")
  {
    LM_E(("predetectedError not empty"));
    response.errorCode.fill(SccBadRequest, predetectedError);
  }
  else if (contextRegistrationVector.size() == 0)
  {
    LM_E(("contextRegistrationVector.size() == 0"));
    response.errorCode.fill(SccBadRequest, "Empty Context Registration List");
  }
  else if (((res = contextRegistrationVector.check(RegisterContext, format, indent, predetectedError, counter)) != "OK") ||
           ((res = duration.check(RegisterContext, format, indent, predetectedError, counter))                  != "OK") ||
           ((res = registrationId.check(RegisterContext, format, indent, predetectedError, counter))            != "OK"))
  {
    LM_E(("Some check method failed: %s", res.c_str()));
    response.errorCode.fill(SccBadRequest, res);
  }
  else
    return "OK";

  LM_E(("Not OK - returning rendered error result"));     
  return response.render(RegisterContext, format, indent);
}

/* ****************************************************************************
*
* Notifier::destroyOntimeIntervalThreads -
*/
void Notifier::destroyOntimeIntervalThreads(const std::string& subId) {

    std::vector<pthread_t> canceled;

    /* Get all the ThreadParams associated to the given subId. Inspired in
     * http://advancedcppwithexamples.blogspot.com.es/2009/04/example-of-c-multimap.html
     */
    std::pair<std::multimap<std::string, ThreadData>::iterator, std::multimap<std::string, ThreadData>::iterator> ii;
    std::multimap<std::string, ThreadData>::iterator it;
    ii = this->threadsMap.equal_range(subId);
    for (it = ii.first; it != ii.second; ++it) {

        ThreadData td = it->second;

        /* Destroy thread */        
        int ret = pthread_cancel(td.tid);
        if (ret != 0)
        {
          LM_E(("Runtime Error (error canceling thread %lu: %d)", (unsigned long) td.tid, ret));
          return;
        }

        /* Note that we do the cancelation in parallel, storing the thread ID. This
         * vector is processed afterwards to wait for every thread to finish */
        canceled.push_back(td.tid);

        /* Release memory */
        delete td.params;

    }

    /* Remove key from the hashmap */
    threadsMap.erase(subId);

    /* Wait for all the cancelation to end */
    for (unsigned int ix = 0; ix < canceled.size(); ++ix) {
        void* res;

        /* pthread_join in blocking */
        int ret = pthread_join(canceled[ix], &res);
        if (ret != 0)
        {
          LM_E(("Runtime Error (error joining thread %lu: %d)", (unsigned long) canceled[ix], ret));
          return;
        }

        if (res == PTHREAD_CANCELED)
        {
            LM_T(LmtNotifier, ("canceled thread: %lu", (unsigned long) canceled[ix]));
        }
        else
        {
          LM_E(("Runtime Error (unexpected error: thread can not be canceled)"));
          return;
        }
    }

    canceled.clear();
}

/* ****************************************************************************
*
* jsonTreat - 
*/
std::string jsonTreat(const char* content, ConnectionInfo* ciP, ParseData* parseDataP, RequestType request, std::string payloadWord, JsonRequest** reqPP)
{
  std::string   res   = "OK";
  JsonRequest*  reqP  = jsonRequestGet(request, ciP->method);

  LM_T(LmtParse, ("Treating a JSON request: '%s'", content));

  ciP->parseDataP = parseDataP;

  if (reqP == NULL)
  {
    std::string errorReply = restErrorReplyGet(ciP, ciP->outFormat, "", requestType(request), SccBadRequest,
                                               std::string("Sorry, no request treating object found for RequestType '") + requestType(request) + "'");

    LM_RE(errorReply, ("Sorry, no request treating object found for RequestType %d (%s)", request, requestType(request)));
  }

  if (reqPP != NULL)
    *reqPP = reqP;

  LM_T(LmtParse, ("Treating '%s' request", reqP->keyword.c_str()));

  reqP->init(parseDataP);

  try
  {
    res = jsonParse(ciP, content, reqP->keyword, reqP->parseVector, parseDataP);
    if (ciP->inCompoundValue == true)
      orion::compoundValueEnd(ciP, parseDataP);
    if ((lmTraceIsSet(LmtCompoundValueShow)) && (ciP->compoundValueP != NULL))
      ciP->compoundValueP->shortShow("after parse: ");
  }
  catch (std::exception &e)
  {
    std::string errorReply  = restErrorReplyGet(ciP, ciP->outFormat, "", reqP->keyword, SccBadRequest, std::string("JSON Parse Error: ") + e.what());
    LM_E(("JSON Parse Error: '%s'", e.what()));
    LM_RE(errorReply, (res.c_str()));
  }

  if (res != "OK")
  {
    LM_E(("JSON parse error: %s", res.c_str()));
    ciP->httpStatusCode = SccBadRequest;

    std::string answer = restErrorReplyGet(ciP, ciP->outFormat, "", payloadWord, ciP->httpStatusCode, res);
    return answer; 
  }

  reqP->present(parseDataP);

  LM_T(LmtParseCheck, ("Calling check for JSON parsed tree (%s)", ciP->payloadWord));
  res = reqP->check(parseDataP, ciP);
  reqP->present(parseDataP);

  return res;
}

/* ****************************************************************************
*
* treat -
*
* This is the function that actually treats a node, bu calling its treat function
* provided by src/lib/xmlRequest - the entry point of XML parsing.
*
* It simple compares the current path with the paths in the incoming vector 'parseVector'
* and if a hit is found calls the 'treat' function of that hit (the instance of the vector).
*
* If no hit is found it means that the path of the current XML node is unknown.
* This will result in either a 'PARSE ERROR' or thatthe node is part of a Compound.
*/
static bool treat(ConnectionInfo* ciP, xml_node<>* node, const std::string& path, XmlNode* parseVector, ParseData* parseDataP)
{
  for (unsigned int ix = 0; parseVector[ix].path != "LAST"; ++ix)
  {
    if (path == parseVector[ix].path)
    {
      int r;

      //
      // Before treating a node, a check is made that the value of the node has no forbidden
      // characters.
      // However, if the the node has attributes, then the values of the attributes are checked instead
      //
      if (node->first_attribute() == NULL)
      {
        if (forbiddenChars(node->value()) == true)
        {
          LM_E(("Found a forbidden value in '%s'", node->value()));
          ciP->httpStatusCode = SccBadRequest;
          ciP->answer = std::string("Illegal value for XML attribute");
          return true;
        }
      }
      else
      {
        for (xml_attribute<> *attr = node->first_attribute(); attr; attr = attr->next_attribute())
        {
          if (forbiddenChars(attr->value()) == true)
          {
            LM_E(("Found a forbidden value in attribute: '%s'", node->value()));
            ciP->httpStatusCode = SccBadRequest;
            ciP->answer = std::string("Illegal value for XML attribute");
            return true;
          }
        }
      }

      if ((r = parseVector[ix].treat(node, parseDataP)) != 0)
      {
        LM_W(("Bad Input (xml parse error %d)", r));
      }

      return true;  // Node has been treated
    }
  }

  return false;  // Node was not found in the parse vector
}

/* ****************************************************************************
*
* strToLower - 
*/
char* strToLower(char* to, const char* from, int toSize)
{
  int fromSize = strlen(from);

  if (toSize < fromSize + 1)
  {
    LM_E(("Runtime Error (cannot copy %d bytes into a buffer of %d bytes)", fromSize + 1, toSize));
    fromSize = toSize;
  }

  int ix;
  for (ix = 0; ix < fromSize; ix++)
  {
    if ((from[ix] >= 'A') && (from[ix] <= 'Z'))
    {
      to[ix] = from[ix] + ('a' - 'A');
    }
    else
    {
      to[ix] = from[ix];
    }
  }

  to[ix] = 0;

  return to;
}

/* ****************************************************************************
*
* forbiddenChars - 
*/
bool forbiddenChars(const char* s, const char* exceptions)
{
  if (s == (void*) 0)
  {
    return false;
  }

  while (*s != 0)
  {
    if ((exceptions != NULL) && (strchr(exceptions, *s) != NULL))
    {
      ++s;
      continue;
    }

    switch (*s)
    {
    case '<':
    case '>':
    case '"':
    case '\'':
    case '=':
    case ';':
    case '(':
    case ')':
      LM_E(("Bad Input (character '%c')", *s));
      return true;
    }

    ++s;
  }

  return false;
}

/* ****************************************************************************
*
* restReply - 
*/
void restReply(ConnectionInfo* ciP, const std::string& answer)
{
  MHD_Response*  response;

  ++replyIx;
  LM_T(LmtServiceOutPayload, ("Response %d: responding with %d bytes, Status Code %d", replyIx, answer.length(), ciP->httpStatusCode));
  LM_T(LmtServiceOutPayload, ("Response payload: '%s'", answer.c_str()));

  if (answer == "")
    response = MHD_create_response_from_data(answer.length(), (void*) answer.c_str(), MHD_NO, MHD_NO);
  else
    response = MHD_create_response_from_data(answer.length(), (void*) answer.c_str(), MHD_YES, MHD_YES);

  if (!response)
  {
    LM_E(("Runtime Error (MHD_create_response_from_buffer FAILED)"));
    return;
  }

  for (unsigned int hIx = 0; hIx < ciP->httpHeader.size(); ++hIx)
    MHD_add_response_header(response, ciP->httpHeader[hIx].c_str(), ciP->httpHeaderValue[hIx].c_str());

  if (answer != "")
  {
    if (ciP->outFormat == XML)
      MHD_add_response_header(response, "Content-Type", "application/xml");
    else if (ciP->outFormat == JSON)
      MHD_add_response_header(response, "Content-Type", "application/json");
  }

  MHD_queue_response(ciP->connection, ciP->httpStatusCode, response);
  MHD_destroy_response(response);
}

/* ****************************************************************************
*
* QueueNotifier::sendNotifyContextRequest -
*/
void QueueNotifier::sendNotifyContextRequest
(
    NotifyContextRequest*            ncr,
    const ngsiv2::HttpInfo&          httpInfo,
    const std::string&               tenant,
    const std::string&               xauthToken,
    const std::string&               fiwareCorrelator,
    RenderFormat                     renderFormat,
    const std::vector<std::string>&  attrsOrder,
    const std::vector<std::string>&  metadataFilter,
    bool                             blacklist
    )
{
  std::vector<SenderThreadParams*> *paramsV = Notifier::buildSenderParams(ncr, httpInfo, tenant, xauthToken, fiwareCorrelator, renderFormat, attrsOrder, metadataFilter, blacklist);

  for (unsigned ix = 0; ix < paramsV->size(); ix++) {
    clock_gettime(CLOCK_REALTIME, &(((*paramsV)[ix])->timeStamp));
  }
  bool enqueued = queue.try_push(paramsV);
  if (!enqueued)
  {
    QueueStatistics::incReject(paramsV->size());

    LM_E(("Runtime Error (notification queue is full)"));
    for (unsigned ix = 0; ix < paramsV->size(); ix++) {
      delete (*paramsV)[ix];
    }
    delete paramsV;

    return;
  }

  QueueStatistics::incIn(paramsV->size());

}

/* ****************************************************************************
*
* httpRequestSend - 
*
* RETURN VALUES
*   httpRequestSend returns 0 on success and a negative number on failure:
*     -1: Invalid port
*     -2: Invalid IP
*     -3: Invalid verb
*     -4: Invalid resource
*     -5: No Content-Type BUT content present
*     -6: Content-Type present but there is no content
*     -7: Total outgoing message size is too big
*     -8: Unable to initialize libcurl
*     -9: Error making HTTP request
*
*   [ error codes -1 to -7 comes from httpRequestSendWithCurl ]
*/
int httpRequestSend
(
   const std::string&     _ip,
   unsigned short         port,
   const std::string&     protocol,
   const std::string&     verb,
   const std::string&     tenant,
   const std::string&     servicePath,
   const std::string&     xauthToken,
   const std::string&     resource,
   const std::string&     orig_content_type,
   const std::string&     content,
   const std::string&     fiwareCorrelation,
   const std::string&     ngisv2AttrFormat,
   bool                   useRush,
   bool                   waitForResponse,
   std::string*           outP,
   const std::string&     acceptFormat,
   long                   timeoutInMilliseconds
)
{
  struct curl_context  cc;
  int                  response;

  get_curl_context(_ip, &cc);
  if (cc.curl == NULL)
  {
    release_curl_context(&cc);
    LM_E(("Runtime Error (could not init libcurl)"));
    lmTransactionEnd();

    *outP = "error";
    return -8;
  }

  response = httpRequestSendWithCurl(cc.curl,
                                     _ip,
                                     port,
                                     protocol,
                                     verb,
                                     tenant,
                                     servicePath,
                                     xauthToken,
                                     resource,
                                     orig_content_type,
                                     content,
                                     fiwareCorrelation,
                                     ngisv2AttrFormat,
                                     useRush,
                                     waitForResponse,
                                     outP,
                                     acceptFormat,
                                     timeoutInMilliseconds);
  release_curl_context(&cc);
  return response;
}

/* ****************************************************************************
*
* AlarmManager::semInit - 
*/
int AlarmManager::semInit(void)
{
  if (sem_init(&sem, 0, 1) == -1)
  {
    LM_E(("Runtime Error (error initializing 'alarm mgr' semaphore: %s)", strerror(errno)));
    return -1;
  }

  return 0;
}

/* ****************************************************************************
*
* Notifier::sendNotifyContextAvailabilityRequest -
*
* FIXME: this method is very similar to sendNotifyContextRequest and probably
* they could be refactored in the future to have a common part using a parent
* class for both types of notifications and using it as first argument
*/
void Notifier::sendNotifyContextAvailabilityRequest
(
  NotifyContextAvailabilityRequest*  ncar,
  const std::string&                 url,
  const std::string&                 tenant,
  const std::string&                 fiwareCorrelator,
  RenderFormat                       renderFormat
)
{
    /* Render NotifyContextAvailabilityRequest */
    std::string payload = ncar->render(NotifyContextAvailability, "");

    /* Parse URL */
    std::string  host;
    int          port;
    std::string  uriPath;
    std::string  protocol;

    if (!parseUrl(url, host, port, uriPath, protocol))
    {
      std::string details = std::string("sending NotifyContextAvailabilityRequest: malformed URL: '") + url + "'";
      alarmMgr.badInput(clientIp, details);

      return;
    }

    /* Set Content-Type */
    std::string content_type = "application/json";

    /* Send the message (without awaiting response, in a separate thread to avoid blocking) */
    pthread_t            tid;
    SenderThreadParams*  params = new SenderThreadParams();

    params->ip               = host;
    params->port             = port;
    params->verb             = "POST";
    params->tenant           = tenant;
    params->resource         = uriPath;   
    params->content_type     = content_type;
    params->content          = payload;
    params->mimeType         = JSON;
    params->fiwareCorrelator = fiwareCorrelator;
    params->renderFormat     = renderFormatToString(renderFormat);

    strncpy(params->transactionId, transactionId, sizeof(params->transactionId));

    int ret = pthread_create(&tid, NULL, startSenderThread, params);
    if (ret != 0)
    {
      LM_E(("Runtime Error (error creating thread: %d)", ret));
      return;
    }
    pthread_detach(tid);
}

/* ****************************************************************************
*
* SubscriptionCache::insert - 
*/
void SubscriptionCache::insert(Subscription* subP)
{
  if (subP->entityIdInfos.size() == 0)
  {
    LM_E(("Runtime Error (no entity for subscription - not inserted in subscription cache)"));
    return;
  }

  subs.push_back(subP);

  ++noOfSubCacheEntries;
}

/* ****************************************************************************
*
* semInit -
*
*   parameter #1: 0 - the semaphore is to be shared between threads,
*   parameter #2: 1 - initially the semaphore is free
*
* RETURN VALUE (of sem_init)
*   0 on success,
*  -1 on failure
*
*/
int semInit(int shared, int takenInitially)
{
  if (sem_init(&reqSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'req' semaphore: %s)", strerror(errno)));
    return 1;
  }

  if (sem_init(&mongoSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'mongo' semaphore: %s)", strerror(errno)));
    return 2;
  }

  if (sem_init(&transSem, shared, takenInitially) == -1)
  {
    LM_E(("Runtime Error (error initializing 'transactionId' semaphore: %s)", strerror(errno)));
    return 3;
  }

  return 0;
}