eventHeader.cc

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// gstreamer
#include "gstreamerJSONFactory.h"
#include "gstreamerConventions.h"
 
// Implementation summary:
// Append the event header fields to the JSON event object currently under construction.
 
bool GstreamerJsonFactory::publishEventHeaderImpl(const std::unique_ptr<GEventHeader>& gevent_header) {
    if (!is_building_event) {
        log->error(gstreamer::ERR_PUBLISH_ERROR,
                   "publishEventHeaderImpl called without an active event in GstreamerJsonFactory");
        return false;
    }
    if (!gevent_header) {
        log->error(gstreamer::ERR_PUBLISH_ERROR,
                   "gevent_header is null in GstreamerJsonFactory::publishEventHeaderImpl");
        return false;
    }
 
    // Cache selected values because other publish steps may use them for diagnostics
    // or schema shaping.
    timestamp = gevent_header->getTimeStamp();
    thread_id = gevent_header->getThreadID();
 
    // startEventImpl() already emitted:
    //   { "event_number": ..., "header": {
    // so this method only appends the header fields themselves.
    current_event << "\"timestamp\": \"" << jsonEscape(timestamp) << "\""
                  << ", \"thread_id\": " << thread_id
                  << ", \"g4local_event\": " << gevent_header->getG4LocalEvn();
    current_event << "}"; // close the "header" object opened in startEventImpl
 
    current_event_has_header = true;
    return true;
}