sensorconfig.cpp 40.8 KB
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SCError SensorConfigImpl::getSensorListForPattern(std::list<SensorId>& sensorIds, std::string pattern, TimeStamp start, TimeStamp end)
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{
  /* Clear the list of sensorIds */
  sensorIds.clear();

  /* Strip all slashes from publishedSensorName */
  pattern.erase(std::remove(pattern.begin(), pattern.end(), '/'), pattern.end());

  /* Calculate lower and upper boundaries for the expansion of the pattern */
  std::string low  = pattern;
  std::string high = pattern;
  if (pattern.find("*") != std::string::npos) {
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      low.replace(pattern.find("*"), 1, 29-pattern.length(), '0');
      high.replace(pattern.find("*"), 1, 29-pattern.length(), 'F');
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  }

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  /* The week stamp is imprinted on the lower 4 bits */
  low.append("0000");
  high.append("FFFF");
	
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  SensorId lowId, highId;
  if (!lowId.mqttTopicConvert(low)) {
      return SC_INVALIDPATTERN;
  }
  if (!highId.mqttTopicConvert(high)) {
      return SC_INVALIDPATTERN;
  }
  lowId.setRsvd(start.getWeekstamp());
  highId.setRsvd(end.getWeekstamp());

  low = lowId.serialize();
  high = highId.serialize();

//  std::cout << "Lower boundary for sensor scan: " << std::hex << std::setfill('0') << std::setw(16) << lowId.raw[0] << " " << std::hex << std::setfill('0') << std::setw(16) << lowId.raw[1] << std::endl;
//  std::cout << "Upper boundary for sensor scan: " << std::hex << std::setfill('0') << std::setw(16) << highId.raw[0] << " " << std::hex << std::setfill('0') << std::setw(16) << highId.raw[1] << std::endl;

  /* Query the database to see which raw sensors actually exist in the interval between low and high */
  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "SELECT DISTINCT sid FROM " KEYSPACE_NAME "." CF_SENSORDATA " WHERE TOKEN(sid) >= ? and TOKEN(sid) <= ?;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_bytes(statement, 0, (const cass_byte_t*)(low.c_str()), 16);
  cass_statement_bind_bytes(statement, 1, (const cass_byte_t*)(high.c_str()), 16);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      return SC_UNKNOWNERROR;
  }

  const CassResult* result = cass_future_get_result(future);
  cass_future_free(future);

  CassIterator* iterator = cass_iterator_from_result(result);
  while (cass_iterator_next(iterator)) {
      const CassRow* row = cass_iterator_get_row(iterator);
      const cass_byte_t* res;
      size_t       res_len;
      cass_value_get_bytes(cass_row_get_column_by_name(row, "sid"), &res, &res_len);

      uint64_t raw[2];
      raw[0] = Endian::BEToHost(((uint64_t*)res)[0]);
      raw[1] = Endian::BEToHost(((uint64_t*)res)[1]);

      SensorId sensor;
      sensor.setRaw(raw);

      /* Check if the sensorId matches the pattern and append to result */
      if (sensor.patternMatch(pattern)) {
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          /* Only append if within the weekstamp window */
          if ((sensor.getRsvd() >= start.getWeekstamp()) && (sensor.getRsvd() <= end.getWeekstamp())) {
              sensorIds.push_back(sensor);
          }
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      }
  }
  cass_result_free(result);
  cass_iterator_free(iterator);
  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return SC_OK;
}

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SCError SensorConfigImpl::setSensorScalingFactor(std::string publicName, double scalingFactor)
{
  SCError error = SC_UNKNOWNERROR;

  /* Check the sensorconfig whether the given public sensor has the integrable flag set to true */
  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET scaling_factor = ? WHERE name = ? ;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_double(statement, 0, scalingFactor);
  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}

SCError SensorConfigImpl::setSensorUnit(std::string publicName, std::string unit)
{
  SCError error = SC_UNKNOWNERROR;

  /* Check the sensorconfig whether the given public sensor has the integrable flag set to true */
  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET unit = ? WHERE name = ? ;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_string(statement, 0, unit.c_str());
  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}

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SCError SensorConfigImpl::setSensorMask(std::string publicName, uint64_t mask)
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{
  SCError error = SC_UNKNOWNERROR;

  /* Check the sensorconfig whether the given public sensor has the integrable flag set to true */
  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
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  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET sensor_mask = ? WHERE name = ? ;";
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  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

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  cass_statement_bind_int64(statement, 0, mask);
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  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}
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SCError SensorConfigImpl::setVirtualSensorExpression(std::string publicName, std::string expression)
{
  /* Check if the session is valid */
  if (!session) {
      return SC_INVALIDSESSION;
  }

  /* Ensure that the public sensor is virtual */
  bool virt;
  SCError err = isVirtual(virt, publicName);
  if (err != SC_OK) {
      return err;
  }
  if (!virt) {
      return SC_WRONGTYPE;
  }

  /* TODO: Validate expression! */

  /* Update the database with the new expression */
  SCError error = SC_UNKNOWNERROR;

  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET expression = ? WHERE name = ? ;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_string(statement, 0, expression.c_str());
  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}

SCError SensorConfigImpl::setVirtualSensorTZero(std::string publicName, TimeStamp tZero)
{
  /* Check if the session is valid */
  if (!session) {
      return SC_INVALIDSESSION;
  }

  /* Ensure that the public sensor is virtual */
  bool virt;
  SCError err = isVirtual(virt, publicName);
  if (err != SC_OK) {
      return err;
  }
  if (!virt) {
      return SC_WRONGTYPE;
  }

  /* Update the database with the new expression */
  SCError error = SC_UNKNOWNERROR;

  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET tzero = ? WHERE name = ? ;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_int64(statement, 0, tZero.getRaw());
  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}

SCError SensorConfigImpl::setVirtualSensorFrequency(std::string publicName, uint64_t frequency)
{
  /* Check if the session is valid */
  if (!session) {
      return SC_INVALIDSESSION;
  }

  /* Ensure that the public sensor is virtual */
  bool virt;
  SCError err = isVirtual(virt, publicName);
  if (err != SC_OK) {
      return err;
  }
  if (!virt) {
      return SC_WRONGTYPE;
  }

  /* Update the database with the new expression */
  SCError error = SC_UNKNOWNERROR;

  CassError rc = CASS_OK;
  CassStatement* statement = nullptr;
  CassFuture* future = nullptr;
  const CassPrepared* prepared = nullptr;
  const char* query = "UPDATE " CONFIG_KEYSPACE_NAME "." CF_PUBLISHEDSENSORS " SET frequency = ? WHERE name = ? ;";

  future = cass_session_prepare(session, query);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    connection->printError(future);
    return SC_UNKNOWNERROR;
  }

  prepared = cass_future_get_prepared(future);
  cass_future_free(future);

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_int64(statement, 0, frequency);
  cass_statement_bind_string(statement, 1, publicName.c_str());

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
      connection->printError(future);
      error = SC_UNKNOWNERROR;
  }
  else {
      error = SC_OK;
  }

  cass_statement_free(statement);
  cass_prepared_free(prepared);

  return error;
}

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SensorConfigImpl::SensorConfigImpl(Connection* conn)
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{
  connection = conn;
  session = connection->getSessionHandle();
}

SensorConfigImpl::~SensorConfigImpl()
{
  connection = nullptr;
  session = nullptr;
}