json_object * api_json_tuples(Buffer::Ptr buf) {
json_object *json_tuples = json_object_new_array();
Buffer::iterator it;
print(log_debug, "==> number of tuples: %d", "api", buf->size());
for (it = buf->begin(); it != buf->end(); it++) {
struct json_object *json_tuple = json_object_new_array();
buf->lock();
// TODO use long int of new json-c version
// API requires milliseconds => * 1000
double timestamp = it->tvtod() * 1000;
double value = it->value();
buf->unlock();
json_object_array_add(json_tuple, json_object_new_double(timestamp));
json_object_array_add(json_tuple, json_object_new_double(value));
json_object_array_add(json_tuples, json_tuple);
}
return json_tuples;
}
json_object * vz::api::Volkszaehler::api_json_tuples(Buffer::Ptr buf) {
json_object *json_tuples = json_object_new_array();
Buffer::iterator it;
print(log_debug, "==> number of tuples: %d", channel()->name(), buf->size());
uint64_t timestamp = 1;
// copy all values to local buffer queue
buf->lock();
for (it = buf->begin(); it != buf->end(); it++) {
timestamp = round(it->tvtod() * 1000);
print(log_debug, "compare: %llu %llu %f", channel()->name(), _last_timestamp, timestamp, it->tvtod() * 1000);
if (_last_timestamp < timestamp ) {
_values.push_back(*it);
_last_timestamp = timestamp;
}
it->mark_delete();
}
buf->unlock();
buf->clean();
if (_values.size() < 1 ) {
return NULL;
}
for (it = _values.begin(); it != _values.end(); it++) {
struct json_object *json_tuple = json_object_new_array();
// TODO use long int of new json-c version
// API requires milliseconds => * 1000
double timestamp = it->tvtod() * 1000;
double value = it->value();
json_object_array_add(json_tuple, json_object_new_double(timestamp));
json_object_array_add(json_tuple, json_object_new_double(value));
json_object_array_add(json_tuples, json_tuple);
}
return json_tuples;
}