private void appendStructuredElements(final StringBuilder buffer, final LogEvent event) {
final Message message = event.getMessage();
final boolean isStructured = message instanceof StructuredDataMessage;
if (!isStructured && (fieldFormatters != null && fieldFormatters.isEmpty()) && !includeMdc) {
buffer.append('-');
return;
}
final Map<String, StructuredDataElement> sdElements =
new HashMap<String, StructuredDataElement>();
final Map<String, String> contextMap = event.getContextMap();
if (mdcRequired != null) {
checkRequired(contextMap);
}
if (fieldFormatters != null) {
for (final Map.Entry<String, FieldFormatter> sdElement : fieldFormatters.entrySet()) {
final String sdId = sdElement.getKey();
final StructuredDataElement elem = sdElement.getValue().format(event);
sdElements.put(sdId, elem);
}
}
if (includeMdc && contextMap.size() > 0) {
if (sdElements.containsKey(mdcSdId.toString())) {
final StructuredDataElement union = sdElements.get(mdcSdId.toString());
union.union(contextMap);
sdElements.put(mdcSdId.toString(), union);
} else {
final StructuredDataElement formattedContextMap =
new StructuredDataElement(contextMap, false);
sdElements.put(mdcSdId.toString(), formattedContextMap);
}
}
if (isStructured) {
final StructuredDataMessage data = (StructuredDataMessage) message;
final Map<String, String> map = data.getData();
final StructuredDataId id = data.getId();
final String sdId = getId(id);
if (sdElements.containsKey(sdId)) {
final StructuredDataElement union = sdElements.get(id.toString());
union.union(map);
sdElements.put(sdId, union);
} else {
final StructuredDataElement formattedData = new StructuredDataElement(map, false);
sdElements.put(sdId, formattedData);
}
}
if (sdElements.isEmpty()) {
buffer.append('-');
return;
}
for (final Map.Entry<String, StructuredDataElement> entry : sdElements.entrySet()) {
formatStructuredElement(entry.getKey(), mdcPrefix, entry.getValue(), buffer, checker);
}
}
